<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I haven’t seen any further issues, so have merged in spimaster branch to master.<div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 19 Jan 2022, at 6:28 PM, Michael Balzer <<a href="mailto:dexter@expeedo.de" class="">dexter@expeedo.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="content-isolator__container"><div class="protected-part"><div class="protected-title">Signed PGP part</div><div class="protected-content">
  
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  <div class="">
    I recently have begun using CAN3 on my car to log the original OCU
    CAN communication.<br class="">
    <br class="">
    I'm using the 'spimaster' branch for this now (with latest master
    merged in) and everything looks fine.<br class="">
    <br class="">
    I cannot test high volume performance in my setup though, as the bus
    is only running at 100 kbit.<br class="">
    <br class="">
    Regards,<br class="">
    Michael<br class="">
    <br class="">
    <br class="">
    <div class="moz-cite-prefix">Am 04.01.22 um 02:09 schrieb Mark
      Webb-Johnson:<br class="">
    </div>
    <blockquote type="cite" cite="mid:6AE6EF67-B29F-4637-BE2E-D054CA8C38F8@webb-johnson.net" class="">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
      An update on this.
      <div class=""><br class="">
      </div>
      <div class="">Working with another developer, we have made some
        changes in a ’spimaster’ branch:</div>
      <div class=""><br class="">
      </div>
      <div class="">
        <ol class="MailOutline">
          <li class="">Stop using spi_nodma fork of ESP’s standard spi
            code, and switch back to use the standard ESP IDF spi
            master.<br class="">
            <br class="">
          </li>
          <li class="">To support >3 devices (which ESP IDF spi
            master doesn’t due to hardware limitations of CS line and 3x
            DMA channels), change to use software CS line for the
            MAX7317 driver (the MCP2515 continue to use hardware CS).<br class="">
            <br class="">
          </li>
          <li class="">Confirm the changes to our MCP2515 driver related
            to keeping track of the last buffer read, to solve the
            out-of-order issue.<br class="">
            <br class="">
          </li>
          <li class="">Confirm the fix for another related issue where
            we don’t block (delay) if the can tx queue is full.</li>
        </ol>
        <div class=""><br class="">
        </div>
        <div class="">These seem better now, and I am able to establish a CAN IP
          connection over MCP2515. Frames come in order, and we are
          seeing performance around 700 frames/second - which should be
          adequate for our needs.</div>
        <div class=""><br class="">
        </div>
        <div class="">I’ll do some more testing over the next few days, and if no
          issues found merge back to master.</div>
        <div class=""><br class="">
        </div>
        <div class="">Regards, Mark.</div>
        <div class=""><br class="">
          <blockquote type="cite" class="">
            <div class="">On 7 Jun 2021, at 12:16 AM, Michael Balzer
              <<a href="mailto:dexter@expeedo.de" class="moz-txt-link-freetext" moz-do-not-send="true">dexter@expeedo.de</a>>
              wrote:</div>
            <br class="Apple-interchange-newline">
            <div class="">
              <div class="content-isolator__container">
                <div class="protected-part">
                  <div class="protected-title">Signed PGP part</div>
                  <div class="protected-content">
                    <meta http-equiv="Content-Type" content="text/html;
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                    <div class=""> Mark,<br class="">
                      <br class="">
                      I've just found a spot-on post on this issue:<br class="">
                      <br class="">
                      <a class="moz-txt-link-freetext" href="https://www.microchip.com/forums/tm.aspx?m=620741" moz-do-not-send="true">https://www.microchip.com/forums/tm.aspx?m=620741</a><br class="">
                      <br class="">
                      Tom suggests implementing a state machine to
                      reproduce the receive order. His analysis &
                      solution looks sound to me.<br class="">
                      <br class="">
                      Regards,<br class="">
                      Michael<br class="">
                      <br class="">
                      <br class="">
                      <div class="moz-cite-prefix">Am 06.06.21 um 14:50
                        schrieb Mark Webb-Johnson:<br class="">
                      </div>
                      <blockquote type="cite" cite="mid:87628F90-5C9C-4BA0-BC26-6A3C2F6941AA@webb-johnson.net" class="">
                        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
                        <div class=""><br class="">
                        </div>
                        I spent quite a bit of time on this. With my
                        standard test packet of 11 CAN frames expected,
                        and the standard driver, I get perhaps 4 or 5 of
                        them (about half are lost, and some are out of
                        order).
                        <div class=""><br class="">
                        </div>
                        <div class="">I made the suggested change to
                          move the MyCan.IncomingFrame() call out of the
                          ‘can’ object (when frameReceived is true) to
                          within the
                          mcp2515 AsynchronousInterruptHandler itself.
                          That allows the handler to receive more than
                          one frame per call and is a very simple
                          change. Once that is done, we can at least now
                          try to tune it.</div>
                        <div class=""><br class="">
                        </div>
                        <div class="">So I then modified the code of
                          mcp2515 AsynchronousInterruptHandler to loop
                          so long as the interrupt flag says either
                          buffer #0 or #1 has a frame. The result looks
                          something like this:</div>
                        <div class=""><br class="">
                        </div>
                        <blockquote style="margin: 0 0 0 40px; border:
                          none; padding: 0px;" class="">
                          <div class="">
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  instat=01 errflag=00 txb0ctrl=00</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  rx frame from buffer #0 (ID 0x110
                                  B1=54)</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  instat=23 errflag=40 txb0ctrl=00</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  rx frame from buffer #0 (ID 0x110
                                  B1=40)</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  rx frame from buffer #1 (ID 0x110
                                  B1=45)</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  Clear RX buffer #0 overflow flag</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  instat=23 errflag=00 txb0ctrl=00</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  rx frame from buffer #0 (ID 0x110
                                  B1=24)</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  rx frame from buffer #1 (ID 0x110
                                  B1=34)</span></font></div>
                            <div class=""><font class="" face="Andale
                                Mono"><span style="font-style: normal;
                                  font-size: 14px;" class="">D (63192)
                                  mcp2515: AsynchronousInterruptHandler
                                  instat=20 errflag=00 txb0ctrl=00</span></font></div>
                          </div>
                        </blockquote>
                        <div class="">
                          <div class=""><br class="">
                          </div>
                          <div class="">The actual frames on the bus are
                            (B1 values) 54, 45, 40, 0a, 7a, d5, 0c, 14,
                            1c, 24, 2c, and 34. Looking at the above
                            debug output, we get:</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">
                            <ul class="MailOutline">
                              <li class="">Interrupt flags show buffer
                                #0 has a frame. It is B1=54. Good.</li>
                              <li class="">Interrupt flags show buffers
                                #0 and #1 both have frames. Buffer #0
                                has B1=40 and buffer #1 has B1=45.</li>
                              <li class="">Etc etc</li>
                            </ul>
                          </div>
                          <div class=""><br class="">
                          </div>
                          <div class="">That is not good. What must have
                            happened is that the first B1=54 frame
                            arrived, got put in buffer #0, and interrupt
                            was raised. We checked the interrupt flags,
                            found buffer #0 had something, and read the
                            frame ok. All is good. But what is happening
                            now is that between the time we checked the
                            interrupt flags and the time we finished
                            reading the 13 bytes from buffer #0, a
                            second frame arrived and was put in buffer
                            #1. Then a third frame arrives and is put in
                            buffer #0. We loop back to check the
                            interrupt flags and find both buffers have
                            frames ready. So we ready buffer #0 to get
                            the third frame, then buffer #1 to get the
                            second frame. We are out of sequence.</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">By removing the ESP_LOGD
                            statements, I can improve performance enough
                            to get 10 out of the 11 frames, but still
                            sometimes frames are swapped in order.</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">By over-clocking the MCP2515 SPI
                            bus (supposed to be 10MHz, but I push it to
                            15MHz), I can get all 11 frames, but two are
                            out of order.</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">I suppose I can minimise the
                            chance of the out-of-order issue by
                            repeating the call to read interrupt flags
                            after processing buffer #0 but before
                            checking for buffer #1. That would at least
                            reduce the time window to as small as
                            possible, but would be another SPI call and
                            is too slow. Doing that brings us back to
                            losing frames.</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">Another approach may relate to
                            our current use of the READ command to read
                            5 status registers (interrupt flags, error
                            flags, two skipped, then transmit buffer #0
                            flags). There are two specific commands
                            ‘read status’ (which gets the rx and tx
                            buffer status flags in one byte), and ‘rx
                            status’ (which gets just the receive buffer
                            status and some info on the frames received,
                            again in one byte). I think those are more
                            designed for what we are trying to do. I can
                            try to optimise the read loop at the start
                            of the AsynchronousInterruptHandler to use
                            one of those - they are 2 SPI bytes vs 7 for
                            what we are doing at the moment (so more
                            than three times as fast).</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">I think it will also be
                            worthwhile having a look at some other open
                            source mcp2515 drivers to see how other
                            people are doing it.</div>
                          <div class=""><br class="">
                          </div>
                          <div class="">Regards, Mark.</div>
                          <div class=""><br class="">
                            <blockquote type="cite" class="">
                              <div class="">On 4 Jun 2021, at 3:02 PM,
                                Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" class="moz-txt-link-freetext" moz-do-not-send="true">mark@webb-johnson.net</a>>
                                wrote:</div>
                              <br class="Apple-interchange-newline">
                              <div class="">
                                <div class="content-isolator__container">
                                  <div class="protected-part">
                                    <div class="protected-title">Signed
                                      PGP part</div>
                                    <div class="protected-content">
                                      <meta http-equiv="Content-Type" content="text/html;
                                        charset=UTF-8" class="">
                                      <div style="word-wrap: break-word;
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                                        line-break: after-white-space;" class="">
                                        <div class=""><br class="">
                                        </div>
                                        The handler can only return one
                                        frame. As it is, if both buffers
                                        #0 and #1 have a frame, it
                                        returns #0. I am not sure if it
                                        gets called again (seems to
                                        depend on the interrupt gpio
                                        status).
                                        <div class=""><br class="">
                                        </div>
                                        <blockquote style="margin: 0 0 0
                                          40px; border: none; padding:
                                          0px;" class="">
                                          <div class="">
                                            <div class="">// Read the
                                              interrupt pin status and
                                              if it's still active
                                              (low), require another
                                              interrupt handling
                                              iteration</div>
                                            <div class="">  return
                                              !gpio_get_level((gpio_num_t)m_intpin);</div>
                                          </div>
                                        </blockquote>
                                        <div class=""><br class="">
                                        </div>
                                        <div class="">Maybe a quick
                                          solution is to just return
                                          true, immediately
                                          after *frameReceived=true, if
                                          intflag=0x01 and (intstat
                                          & CANINTF_RX1IF)? That
                                          would dispatch the incoming
                                          frame, then call back for more
                                          (from the loop in the can
                                          object).</div>
                                        <div class=""><br class="">
                                        </div>
                                        <div class="">I am not sure in
                                          general
                                          why AsynchronousInterruptHandler
                                          uses a bool frameReceived
                                          flag, and doesn’t just simply
                                          dispatch the frame immediately
                                          to the can object? That would
                                          simplify things and allow
                                          the AsynchronousInterruptHandler
                                          to handle receiving both
                                          frames in the same call. Given
                                          that MCP2515 is the only
                                          driver
                                          using AsynchronousInterruptHandler,
                                          that would be an easy fix.</div>
                                        <div class=""><br class="">
                                        </div>
                                        <div class="">Regards, Mark.</div>
                                        <div class="">
                                          <div class=""><br class="">
                                            <blockquote type="cite" class="">
                                              <div class="">On 4 Jun
                                                2021, at 2:29 PM,
                                                Michael Balzer <<a href="mailto:dexter@expeedo.de" class="moz-txt-link-freetext" moz-do-not-send="true">dexter@expeedo.de</a>>
                                                wrote:</div>
                                              <br class="Apple-interchange-newline">
                                              <div class="">
                                                <div class="content-isolator__container">
                                                  <div class="protected-part">
                                                    <div class="protected-title">Signed
                                                      PGP part</div>
                                                    <div class="protected-content">
                                                      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
                                                      <div class="">
                                                        Mark,<br class="">
                                                        <br class="">
                                                        the handler is
                                                        meant to read
                                                        both buffers
                                                        sequentially,
                                                        and on a quick
                                                        glance I don't
                                                        see why it
                                                        wouldn't. But it
                                                        can't hurt if
                                                        you do an audit
                                                        of the code.<br class="">
                                                        <br class="">
                                                        I remember
                                                        having had that
                                                        out-of-order
                                                        discussion when
                                                        handling both RX
                                                        buffers before
                                                        here, but don't
                                                        remember the
                                                        outcome. Too bad
                                                        the list
                                                        archives cannot
                                                        be searched.<br class="">
                                                        <br class="">
                                                        I think it was
                                                        the MCP not
                                                        doing overflows
                                                        from RX buffer 1
                                                        to 0. I.e. if
                                                        buffer 1 still
                                                        has a frame on
                                                        arrival, the new
                                                        frame will be
                                                        lost. That means
                                                        losing a frame
                                                        if the handler
                                                        cannot react
                                                        fast enough, but
                                                        receiving out of
                                                        order would be
                                                        worse.<br class="">
                                                        <br class="">
                                                        Regards,<br class="">
                                                        Michael<br class="">
                                                        <br class="">
                                                        <br class="">
                                                        <div class="moz-cite-prefix">Am
                                                          04.06.21 um
                                                          04:16 schrieb
                                                          Mark
                                                          Webb-Johnson:<br class="">
                                                        </div>
                                                        <blockquote type="cite" cite="mid:D8550468-CA1D-4552-93D6-CAB4DC5B364F@webb-johnson.net" class="">
                                                          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
                                                          Michael,
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">Good
                                                          suggestion on
                                                          the timing. I
                                                          think it best
                                                          to use the
                                                          same timings
                                                          as the Arduino
                                                          library, and
                                                          have committed
                                                          that change.
                                                          No vehicle
                                                          modules
                                                          currently use
                                                          1Mbps on
                                                          MCP2515
                                                          anyway.
                                                          Unfortunately,
                                                          it didn’t
                                                          resolve my
                                                          problem.</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">Looking
                                                          at the error
                                                          flags I see:</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <div class="">
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">Error
                                                          flag:
                                                           0x23401c01</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">intstat
                                                          0x23</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            ERRIF Error
                                                          Interrupt
                                                          pending</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            RX0IF Rx
                                                          buffer 0 full
                                                          interrupt</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            RX1IF Rx
                                                          buffer 1 full
                                                          interrupt</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">errflag
                                                          0x40</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            RX0OVR Rx
                                                          buffer 0
                                                          overflow</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">intflag
                                                          0x1c01</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            0x01 Implied
                                                          from Rx buffer
                                                          0 full</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            0x1c = 0001
                                                          1100</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            Means RXB0
                                                          overflow. No
                                                          data lost in
                                                          this case (it
                                                          went into
                                                          RXB1)</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            Means
                                                          (errflag &
                                                          EFLG_RX01OVR),
                                                          clear RX
                                                          buffer
                                                          overflow flags</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;
                                                          font-size:
                                                          12px;" class="">     
                                                            Means
                                                          (intstat &
                                                          (CANINTF_MERRF
                                                          |
                                                          CANINTF_WAKIF
                                                          |
                                                          CANINTF_ERRIF)),
                                                          clear error
                                                          & wakeup
                                                          interrupts</span></font></div>
                                                          </div>
                                                          </blockquote>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">So
                                                          we have CAN
                                                          frames in BOTH
                                                          rx buffers #0
                                                          and #1.
                                                          Looking at our
                                                          driver code
                                                          (mcp2515::AsynchronousInterruptHandler),
                                                          it seems in
                                                          that case we
                                                          only read from
                                                          buffer #0.
                                                          From the flow
                                                          I can see, we
                                                          are going to
                                                          lose that
                                                          second frame.
                                                          We’re not
                                                          really
                                                          handling the
                                                          issue of two
                                                          frames being
                                                          in the buffers
                                                          when the
                                                          interrupt
                                                          handler is
                                                          called.</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">As
                                                          the
                                                          architecture
                                                          of <span style="caret-color:
                                                          rgb(0, 0, 0);" class="">mcp2515::AsynchronousInterruptHandler
                                                          can only
                                                          receive one
                                                          frame, it is
                                                          not so simple
                                                          to fix. We
                                                          could simply
                                                          read and
                                                          return the
                                                          frame in
                                                          buffer #0,
                                                          requesting to
                                                          be called
                                                          again (return
                                                          true), but
                                                          another frame
                                                          may arrive
                                                          (into buffer
                                                          #0) before we
                                                          get called
                                                          again, and
                                                          that is going
                                                          to result in
                                                          out-of-order
                                                          frames.</span></div>
                                                          <div class=""><span style="caret-color: rgb(0, 0, 0);" class=""><br class="">
                                                          </span></div>
                                                          <div class="">I’ll
                                                          work on
                                                          improving the
                                                          handling of
                                                          this case.</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">Regards,
                                                          Mark.</div>
                                                          <div class="">
                                                          <div class=""><br class="">
                                                          <blockquote type="cite" class="">
                                                          <div class="">On
                                                          3 Jun 2021, at
                                                          3:07 PM,
                                                          Michael Balzer
                                                          <<a href="mailto:dexter@expeedo.de" class="moz-txt-link-freetext" moz-do-not-send="true">dexter@expeedo.de</a>>
                                                          wrote:</div>
                                                          <br class="Apple-interchange-newline">
                                                          <div class="">
                                                          <div class="content-isolator__container">
                                                          <div class="protected-part">
                                                          <div class="protected-title">Signed
                                                          PGP part</div>
                                                          <div class="protected-content">
                                                          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
                                                          <div class="">
                                                          Mark,<br class="">
                                                          <br class="">
                                                          I'd give the
                                                          bit timing a
                                                          try first, the
                                                          MCP2515 seems
                                                          to be very
                                                          sensitive for
                                                          this. I've
                                                          even had some
                                                          trouble
                                                          finding a
                                                          working
                                                          configuration
                                                          for the 50
                                                          kbit timing
                                                          I've added a
                                                          couple weeks
                                                          ago.<br class="">
                                                          <br class="">
                                                          We currently
                                                          use 00 / D0 /
                                                          82 which is
                                                          also the
                                                          result of the
                                                          old Intrepid
                                                          timing
                                                          calculator.
                                                          That's a
                                                          propagation
                                                          segment of 1
                                                          Tq and 3 Tq
                                                          per phase,
                                                          resulting in
                                                          samling
                                                          between 50% -
                                                          62.5%.<br class="">
                                                          <br class="">
                                                          The Arduino
                                                          MCP CAN lib by
                                                          Cory Fowler
                                                          also had this
                                                          previously,
                                                          but then
                                                          changed in…<br class="">
                                                          <br class="">
                                                          <a class="moz-txt-link-freetext" href="https://github.com/coryjfowler/MCP_CAN_lib/commit/ece730cf697fef1cbe8a90111694868168d41000" moz-do-not-send="true">https://github.com/coryjfowler/MCP_CAN_lib/commit/ece730cf697fef1cbe8a90111694868168d41000</a><br class="">
                                                          <br class="">
                                                          …to 00 / CA /
                                                          81, which is a
                                                          propagation
                                                          segment of 3
                                                          Tq and 2 Tq
                                                          per phase,
                                                          shifting the
                                                          sampling
                                                          window to 62.5
                                                          - 75%.<br class="">
                                                          <br class="">
                                                          Our current
                                                          configuration
                                                          scheme for the
                                                          internal
                                                          SJA1000
                                                          compatible CAN
                                                          seems to
                                                          sample at 62.5
                                                          - 75% as well,
                                                          so that would
                                                          also match.<br class="">
                                                          <br class="">
                                                          Regards,<br class="">
                                                          Michael<br class="">
                                                          <br class="">
                                                          <br class="">
                                                          <div class="moz-cite-prefix">Am
                                                          03.06.21 um
                                                          07:36 schrieb
                                                          Mark
                                                          Webb-Johnson:<br class="">
                                                          </div>
                                                          <blockquote type="cite" cite="mid:B95AD300-ED38-4826-8581-607C4170461E@webb-johnson.net" class="">
                                                          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">I’m
                                                          working on an
                                                          implementation
                                                          of IP stack
                                                          over CAN for
                                                          the Tesla
                                                          Roadster. IP
                                                          frames are
                                                          encoded as a
                                                          length
                                                          followed by a
                                                          sequence of
                                                          CAN frames,
                                                          all on the
                                                          same ID. This
                                                          runs over a
                                                          1MHz bus, so
                                                          presumably the
                                                          traffic volume
                                                          could be high
                                                          at times.</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">I
                                                          was having
                                                          problems with
                                                          this running
                                                          on CAN2, so
                                                          tried CAN1 and
                                                          it worked
                                                          perfectly.
                                                          Here are some
                                                          simple dumps
                                                          of a single
                                                          PING packet
                                                          (and single
                                                          PING response
                                                          packet):</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">ID
                                                          #111 is used
                                                          to transmit an
                                                          IP packet, and
                                                          ID #110 is
                                                          used to
                                                          receive an IP
                                                          packet. The
                                                          special empty
                                                          data frame is
                                                          an
                                                          acknowledgment.</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">Using
                                                          latest master
                                                          branch code
                                                          (3.2.016-196-g0aad1a9f/ota_1/edge
                                                          (build idf
                                                          v3.3.4-848-g1ff5e24b1
                                                          Jun  2 2021
                                                          09:28:58)).</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <div class="">So,
                                                          first let’s
                                                          test with
                                                          traffic on
                                                          CAN1 (active,
                                                          1Mbps), and
                                                          listening on
                                                          CAN2 (listen,
                                                          1Mbps):</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class="">TCPDUMP:</span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><span style="font-family: "Andale Mono";" class="">05:57:55.980291
                                                          IP (tos 0x0,
                                                          ttl 64, id
                                                          43101, offset
                                                          0, flags [DF],
                                                          proto ICMP
                                                          (1), length
                                                          84)</span></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class="">   
                                                          10.10.99.3
                                                          >
                                                          10.10.99.2:
                                                          ICMP echo
                                                          request, id
                                                          23372, seq 1,
                                                          length 64</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0000:
                                                           4500 0054
                                                          a85d 4000 4001
                                                          b832 0a0a 6303
                                                           <a class="moz-txt-link-abbreviated
moz-txt-link-freetext" href="mailto:E..T.]@.@..2..c" moz-do-not-send="true">E..T.]@.@..2..c</a>.</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0010:
                                                           0a0a 6302
                                                          0800 7df8 5b4c
                                                          0001 5361 b860
 ..c...}.[L..Sa.`</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0020:
                                                           19f5 0e00
                                                          0809 0a0b 0c0d
                                                          0e0f 1011 1213
 ................</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0030:
                                                           1415 1617
                                                          1819 1a1b 1c1d
                                                          1e1f 2021 2223
 .............!"#</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0040:
                                                           2425 2627
                                                          2829 2a2b 2c2d
                                                          2e2f 3031 3233
 $%&'()*+,-./0123</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0050:
                                                           3435 3637    
                                                                       
                                                                     
                                                           4567</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class="">05:57:56.436190
                                                          IP (tos 0x0,
                                                          ttl 64, id
                                                          14937, offset
                                                          0, flags
                                                          [none], proto
                                                          ICMP (1),
                                                          length 84)</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class="">   
                                                          10.10.99.2
                                                          >
                                                          10.10.99.3:
                                                          ICMP echo
                                                          reply, id
                                                          23372, seq 1,
                                                          length 64</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0000:
                                                           4500 0054
                                                          3a59 0000 4001
                                                          6637 0a0a 6302
                                                           <a class="moz-txt-link-abbreviated
moz-txt-link-freetext" href="mailto:E..T:Y..@.f7..c" moz-do-not-send="true">E..T:Y..@.f7..c</a>.</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0010:
                                                           0a0a 6303
                                                          0000 85f8 5b4c
                                                          0001 5361 b860
 ..c.....[L..Sa.`</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0020:
                                                           19f5 0e00
                                                          0809 0a0b 0c0d
                                                          0e0f 1011 1213
 ................</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0030:
                                                           1415 1617
                                                          1819 1a1b 1c1d
                                                          1e1f 2021 2223
 .............!"#</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0040:
                                                           2425 2627
                                                          2829 2a2b 2c2d
                                                          2e2f 3031 3233
 $%&'()*+,-./0123</span></font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><span class="Apple-tab-span" style="white-space:pre">   </span>0x0050:
                                                           3435 3637    
                                                                       
                                                                     
                                                           4567</span></font></blockquote>
                                                          <font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class="">Traffic
                                                          (as shown on
                                                          PC the other
                                                          end of the can
                                                          log tcp
                                                          connection):</span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 45 00 00
                                                          54 a8 5d 40 00</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 40 01 b8
                                                          32 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 0a 0a 63
                                                          02 08 00 7d f8</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">tx:
                                                          #111 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 45 00 00
                                                          54 3a 59 00 00</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 40 01 66
                                                          37 0a 0a 63 02</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 0a 0a 63
                                                          03 00 00 85 f8</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0px 0px 0px
                                                          40px; border:
                                                          none; padding:
                                                          0px;" class="">rx:
                                                          #110 34 35 36
                                                          37</blockquote>
                                                          <br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">CAN1
                                                          active:</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1CER
                                                          TX_Queue T11
                                                          111 40 01 b8
                                                          32 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 45 00 00
                                                          54 a8 5d 40 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 40 01 b8
                                                          32 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1CER
                                                          TX_Queue T11
                                                          111 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 0a 0a 63
                                                          02 08 00 7d f8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1CER
                                                          TX_Queue T11
                                                          111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1CER
                                                          TX_Queue T11
                                                          111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1CER
                                                          TX_Queue T11
                                                          111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1T11
                                                          111 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 45 00 00
                                                          54 3a 59 00 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 40 01 66
                                                          37 0a 0a 63 02</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 0a 0a 63
                                                          03 00 00 85 f8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">1R11
                                                          110 34 35 36
                                                          37</blockquote>
                                                          <br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">CAN2
                                                          listen:</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 45 00 00
                                                          54 a8 5d 40 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 40 01 b8
                                                          32 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 0a 0a 63
                                                          02 08 00 7d f8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 5b 4c 00
                                                          01 53 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          111 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          Error intr=10
                                                          rxpkt=14
                                                          txpkt=0
                                                          errflags=0x23401c01
                                                          rxerr=0
                                                          txerr=0
                                                          rxinval=0
                                                          rxovr=0
                                                          txovr=0
                                                          txdelay=0
                                                          txfail=0
                                                          wdgreset=0
                                                          errreset=0</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 40 01 66
                                                          37 0a 0a 63 02</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 19 f5 0e
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 45 00 00
                                                          54 3a 59 00 00</blockquote>
                                                          </font></blockquote>
                                                          </blockquote>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">Conclusion
                                                          is that the
                                                          CAN1 traffic
                                                          looks fine,
                                                          and the PING
                                                          packet gets a
                                                          good reply.
                                                          All
                                                          successful.
                                                          But the CAN2
                                                          listen is
                                                          missing a few
                                                          packets and
                                                          the last
                                                          packet is out
                                                          of order.</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">Now,
                                                          let’s test
                                                          with traffic
                                                          on CAN2
                                                          (active,
                                                          1Mbps), and
                                                          listening on
                                                          CAN1 (listen,
                                                          1Mbps):</div>
                                                          <div class=""><br class="">
                                                          </div>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><font class="" face="Andale
                                                          Mono">TCPDUMP:</font></div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></div>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class="">06:00:33.004060
                                                          IP (tos 0x0,
                                                          ttl 64, id
                                                          58240, offset
                                                          0, flags [DF],
                                                          proto ICMP
                                                          (1), length
                                                          84)</div>
                                                          </span></font></div>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""> 
                                                            10.10.99.3
                                                          >
                                                          10.10.99.2:
                                                          ICMP echo
                                                          request, id
                                                          23393, seq 1,
                                                          length 64</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>0x0000:
                                                           4500 0054
                                                          e380 4000 4001
                                                          7d0f 0a0a 6303
                                                           <a class="moz-txt-link-abbreviated
moz-txt-link-freetext" href="mailto:E..T..@.@" moz-do-not-send="true">E..T..@.@</a>.}...c.</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>0x0010:
                                                           0a0a 6302
                                                          0800 7cc8 5b61
                                                          0001 f161 b860
 ..c...|.[a...a.`</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>0x0020:
                                                           8b0f 0000
                                                          0809 0a0b 0c0d
                                                          0e0f 1011 1213
 ................</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>0x0030:
                                                           1415 1617
                                                          1819 1a1b 1c1d
                                                          1e1f 2021 2223
 .............!"#</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>0x0040:
                                                           2425 2627
                                                          2829 2a2b 2c2d
                                                          2e2f 3031 3233
 $%&'()*+,-./0123</div>
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class="">
                                                          <div class=""><span class="Apple-tab-span" style="white-space: pre;">       </span>0x0050:
                                                           3435 3637    
                                                                       
                                                                     
                                                           4567</div>
                                                          </span></font></blockquote>
                                                          <font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </span></font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">Traffic
                                                          (as shown on
                                                          PC the other
                                                          end of the can
                                                          log tcp
                                                          connection):</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 45 00 00
                                                          54 e3 80 40 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 40 01 7d
                                                          0f 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 0a 0a 63
                                                          02 08 00 7c c8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 5b 61 00
                                                          01 f1 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 8b 0f 00
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">tx:
                                                          #111 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 45 00 00
                                                          54 3a 5a 00 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 0a 0a 63
                                                          03 00 00 84 c8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 8b 0f 00
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">rx:
                                                          #110 40 01 66
                                                          36 0a 0a 63 02</blockquote>
                                                          </font></blockquote>
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">CAN2
                                                          active:</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          TX_Queue T11
                                                          111 40 01 7d
                                                          0f 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 45 00 00
                                                          54 e3 80 40 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 40 01 7d
                                                          0f 0a 0a 63 03</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          TX_Queue T11
                                                          111 5b 61 00
                                                          01 f1 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 0a 0a 63
                                                          02 08 00 7c c8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 5b 61 00
                                                          01 f1 61 b8 60</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          TX_Queue T11
                                                          111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 8b 0f 00
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 0c 0d 0e
                                                          0f 10 11 12 13</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          TX_Queue T11
                                                          111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 14 15 16
                                                          17 18 19 1a 1b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 1c 1d 1e
                                                          1f 20 21 22 23</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          TX_Queue T11
                                                          111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 24 25 26
                                                          27 28 29 2a 2b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 2c 2d 2e
                                                          2f 30 31 32 33</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2T11
                                                          111 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><br class="">
                                                          </blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 54 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 45 00 00
                                                          54 3a 5a 00 00</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2CER
                                                          Error intr=15
                                                          rxpkt=3
                                                          txpkt=12
                                                          errflags=0x23401c01
                                                          rxerr=0
                                                          txerr=0
                                                          rxinval=0
                                                          rxovr=0
                                                          txovr=0
                                                          txdelay=5
                                                          txfail=0
                                                          wdgreset=0
                                                          errreset=0</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 0a 0a 63
                                                          03 00 00 84 c8</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 8b 0f 00
                                                          00 08 09 0a 0b</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 34 35 36
                                                          37</blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">2R11
                                                          110 40 01 66
                                                          36 0a 0a 63 02</blockquote>
                                                          <br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">CAN1
                                                          listen:</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          </font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono">1R11 111
                                                          54 00<br class="">
                                                          1R11 110</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          1R11 111 45 00
                                                          00 54 e3 80 40
                                                          00<br class="">
                                                          1R11 111 40 01
                                                          7d 0f 0a 0a 63
                                                          03<br class="">
                                                          1R11 111 0a 0a
                                                          63 02 08 00 7c
                                                          c8<br class="">
                                                          1R11 111 5b 61
                                                          00 01 f1 61 b8
                                                          60<br class="">
                                                          1R11 111 8b 0f
                                                          00 00 08 09 0a
                                                          0b<br class="">
                                                          1R11 111 0c 0d
                                                          0e 0f 10 11 12
                                                          13<br class="">
                                                          1R11 111 14 15
                                                          16 17 18 19 1a
                                                          1b<br class="">
                                                          1R11 111 1c 1d
                                                          1e 1f 20 21 22
                                                          23<br class="">
                                                          1R11 111 24 25
                                                          26 27 28 29 2a
                                                          2b<br class="">
                                                          1R11 111 2c 2d
                                                          2e 2f 30 31 32
                                                          33<br class="">
                                                          1R11 111 34 35
                                                          36 37</font></blockquote>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class=""><font class="" face="Andale
                                                          Mono"><br class="">
                                                          1R11 110 54 00<br class="">
                                                          1R11 110 45 00
                                                          00 54 3a 5a 00
                                                          00<br class="">
                                                          1R11 110 40 01
                                                          66 36 0a 0a 63
                                                          02<br class="">
                                                          1R11 110 0a 0a
                                                          63 03 00 00 84
                                                          c8<br class="">
                                                          1R11 110 5b 61
                                                          00 01 f1 61 b8
                                                          60<br class="">
                                                          1R11 110 8b 0f
                                                          00 00 08 09 0a
                                                          0b<br class="">
                                                          1R11 110 0c 0d
                                                          0e 0f 10 11 12
                                                          13<br class="">
                                                          1R11 110 14 15
                                                          16 17 18 19 1a
                                                          1b<br class="">
                                                          1R11 110 1c 1d
                                                          1e 1f 20 21 22
                                                          23<br class="">
                                                          1R11 110 24 25
                                                          26 27 28 29 2a
                                                          2b<br class="">
                                                          1R11 110 2c 2d
                                                          2e 2f 30 31 32
                                                          33<br class="">
                                                          1R11 110 34 35
                                                          36 37</font></blockquote>
                                                          </blockquote>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">Conclusion
                                                          is that the
                                                          CAN2 transmit
                                                          traffic looks
                                                          fine, but no
                                                          PING reply
                                                          received via
                                                          CAN. The CAN1
                                                          listen shows
                                                          the reply just
                                                          fine.</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">Here
                                                          is that last
                                                          CAN1 listen,
                                                          with
                                                          timestamps:</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <blockquote style="margin:
                                                          0 0 0 40px;
                                                          border: none;
                                                          padding: 0px;" class="">
                                                          <div class="">
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.080107
                                                          1R11 111 54 00</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.081657
                                                          1R11 110</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.227479
                                                          1R11 111 45 00
                                                          00 54 e3 80 40
                                                          00</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.228318
                                                          1R11 111 40 01
                                                          7d 0f 0a 0a 63
                                                          03</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.245727
                                                          1R11 111 0a 0a
                                                          63 02 08 00 7c
                                                          c8</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.246214
                                                          1R11 111 5b 61
                                                          00 01 f1 61 b8
                                                          60</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.248219
                                                          1R11 111 8b 0f
                                                          00 00 08 09 0a
                                                          0b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.248772
                                                          1R11 111 0c 0d
                                                          0e 0f 10 11 12
                                                          13</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.250774
                                                          1R11 111 14 15
                                                          16 17 18 19 1a
                                                          1b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.251338
                                                          1R11 111 1c 1d
                                                          1e 1f 20 21 22
                                                          23</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.253380
                                                          1R11 111 24 25
                                                          26 27 28 29 2a
                                                          2b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.253944
                                                          1R11 111 2c 2d
                                                          2e 2f 30 31 32
                                                          33</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.265937
                                                          1R11 111 34 35
                                                          36 37</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class=""><br class="">
                                                          </span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.269221
                                                          1R11 110 54 00</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272095
                                                          1R11 110 45 00
                                                          00 54 3a 5a 00
                                                          00</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272125
                                                          1R11 110 40 01
                                                          66 36 0a 0a 63
                                                          02</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272156
                                                          1R11 110 0a 0a
                                                          63 03 00 00 84
                                                          c8</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272193
                                                          1R11 110 5b 61
                                                          00 01 f1 61 b8
                                                          60</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272245
                                                          1R11 110 8b 0f
                                                          00 00 08 09 0a
                                                          0b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272277
                                                          1R11 110 0c 0d
                                                          0e 0f 10 11 12
                                                          13</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272314
                                                          1R11 110 14 15
                                                          16 17 18 19 1a
                                                          1b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272354
                                                          1R11 110 1c 1d
                                                          1e 1f 20 21 22
                                                          23</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272387
                                                          1R11 110 24 25
                                                          26 27 28 29 2a
                                                          2b</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272420
                                                          1R11 110 2c 2d
                                                          2e 2f 30 31 32
                                                          33</span></font></div>
                                                          <div class=""><font class="" face="Andale
                                                          Mono"><span style="caret-color:
                                                          rgb(0, 0, 0);
                                                          font-style:
                                                          normal;" class="">1622696433.272452
                                                          1R11 110 34 35
                                                          36 37</span></font></div>
                                                          </div>
                                                          </blockquote>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">It is
                                                          1Mbps, with
                                                          30us or so
                                                          between each
                                                          packet. This
                                                          is the <b class="">only</b>
                                                          traffic on the
                                                          bus.
                                                          Everything
                                                          else is turned
                                                          off. Roughly
                                                          12 packets
                                                          each way.
                                                          Surely even if
                                                          we were
                                                          hitting a
                                                          performance
                                                          limit, our
                                                          buffers can
                                                          handle 12
                                                          packets?</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">The
                                                          good news is
                                                          that I have a
                                                          good
                                                          environment to
                                                          replicate this
                                                          issue now, so
                                                          any fix should
                                                          be easy to
                                                          test.</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">I
                                                          haven’t worked
                                                          on the MCP2515
                                                          driver in our
                                                          code in a long
                                                          time, but it
                                                          certainly
                                                          seems
                                                          something is
                                                          messed up and
                                                          that could be
                                                          badly
                                                          affecting
                                                          vehicle
                                                          modules using
                                                          anything other
                                                          than CAN1.</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">I
                                                          will start to
                                                          look at this
                                                          over the
                                                          weekend, but
                                                          has anyone got
                                                          any
                                                          ideas/suggestions?
                                                          Perhaps the
                                                          bit timing
                                                          registers are
                                                          off by a small
                                                          amount (so it
                                                          works on CAN1
                                                          but not on
                                                          CAN2)? Or
                                                          something more
                                                          serious in our
                                                          driver?</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class="">Regards,
                                                          Mark.</div>
                                                          <div style="caret-color:
                                                          rgb(0, 0, 0);" class=""><br class="">
                                                          </div>
                                                          <br class="">
                                                          <fieldset class="mimeAttachmentHeader"></fieldset>
                                                          <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
                                                          </blockquote>
                                                          <br class="">
                                                          <pre class="moz-signature" cols="72">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
                                                          </div>
                                                          <span id="cid:4729234A-8C3A-401F-9A97-EA6C8CE8B462" class=""><MCP2515Calc-1000kbit.ods></span></div>
                                                          </div>
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                                                          <pre class="moz-quote-pre" wrap="">_______________________________________________
OvmsDev mailing list
<a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:OvmsDev@lists.openvehicles.com" moz-do-not-send="true">OvmsDev@lists.openvehicles.com</a>
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</pre>
                                                        </blockquote>
                                                        <br class="">
                                                        <pre class="moz-signature" cols="72">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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                          <br class="">
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                        <br class="">
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                        <pre class="moz-quote-pre" wrap="">_______________________________________________
OvmsDev mailing list
<a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:OvmsDev@lists.openvehicles.com" moz-do-not-send="true">OvmsDev@lists.openvehicles.com</a>
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</pre>
                      </blockquote>
                      <br class="">
                      <pre class="moz-signature" cols="72">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
OvmsDev mailing list
<a class="moz-txt-link-abbreviated" href="mailto:OvmsDev@lists.openvehicles.com">OvmsDev@lists.openvehicles.com</a>
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</pre>
    </blockquote>
    <br class="">
    <pre class="moz-signature" cols="72">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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