<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="">In the case of the vehicle modules, the CAN ports are open at boot, work well, but fail some time later.<div class=""><br class=""></div><div class="">The issue seems to be caused by errors on the CAN bus not recovered from, and opening the port could trigger that. But in the case of the vehicle modules, I don’t think that is the cause.</div><div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 30 May 2019, at 1:25 AM, Greg D. <<a href="mailto:gregd2350@gmail.com" class="">gregd2350@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class="">
<div text="#000000" bgcolor="#FFFFFF" class="">
Hi Tom,<br class="">
<br class="">
My suspicion is that it's the opening of the CAN port where the
problem is. I tried putting delays in the OBD2ECU code to cause a
receive overrun, and things recovered just fine when the delay
cleared. Writes to the CAN bus are generally once per read (request
and response sequence), but there are a few places where the task
can issue multiple writes to the bus back-to-back. Some time ago,
two writes were fine, but three (I think) would cause a transmit
overflow. Michael and I fixed that, so even if you're sending
multiple frames it should be fine. Basically, once the bus is open
and running, it seems to work pretty well. It's just that 'open'
procedure that seems to have a problem when the bus is already
active.<br class="">
<br class="">
Note that the only way I have found to clear the hung bus condition
is to stop the traffic, close the port, open the port, and resume
the traffic.<br class="">
<br class="">
I haven't looked at the Leaf code, but I suspect that the climate
commands open the CAN bus, write the necessary frames, and then
close it afterward. If so, that would definitely risk the issue I'm
seeing. If there's a way to open the environmental bus at boot time
and leave it open, that should workaround the problem, assuming of
course that you survive the initial open. I can control the
external device with ext12v power; you can't control the Leaf
environmental bus...<br class="">
<br class="">
Greg<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">Tom Parker wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:25c75c25-b5db-ace9-3bdf-9c8a5c480ac4@carrott.org" class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class=""><p class="">On the 2016 Leaf the Climate Control command is sent on the
'CAR' CAN bus which is connected to on of the exernal can
busses. I'm not sure if there is a task, or if there are other
usages of the CAN2 bus in the Leaf implementation (there weren't
last time I looked closely but I haven't been able to keep up
with the improvements others have made). The Climate Control
does do task or timer related stuff because it sends the CAN
message several times over a period of a second or two.<br class="">
</p><p class="">This is distinct from the earlier Leafs where climate control
is on the EV can bus connected to the internal CAN bus.<br class="">
</p>
<div class="moz-cite-prefix">On 29/05/19 2:57 PM, Greg D. wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:47e335be-220d-9853-7cb9-9306b822e369@gmail.com" class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class="">
Hi Stein,<br class="">
<br class="">
Interesting. Does the "start climate control" command start a
new process/task on OVMS, or otherwise cause the CAN2 bus to be
"opened" at the time of the command? If so, that would be
consistent with what I see. <br class="">
<br class="">
With the OBD2ECU translator, if I have an OBDII device (e.g.
head-up display) running first, and then start the OBD2ECU task,
the bus will hang every time. If I start the task first, then
power up the OBDII device, all will be fine. There seems to be
a collision between the task starting and the data coming in
that triggers the bus hang.<br class="">
<br class="">
I have a pair of scripts to turn on and turn off the Ext12v
supply to the OBDII device when the car is turned on or off,
respectively. That's just to manage the OBDII device as if it
were in an ICE vehicle. What I do now, as a workaround for the
bus hang, is to stop and restart the OBD2ECU task before turning
on the ext12v supply in the car turn-on script. That seems to
work.<br class="">
<br class="">
Not sure how that might help your problem (since you can't turn
off the car's data stream), but at least it would confirm that
we're looking at the same bug. <br class="">
<br class="">
Greg<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">ovms wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:2ed9270d-368d-4798-aabc-8510ee5aa911@DISKSTATION2" class="">
<div class="">I just discovered something. Since the temperature has
been pretty stable the last month (not cold, and not warm) I
have not used the climate control function in OVMS.</div>
<div class="">With the latest firmware, CAN2 can recieve data for many
days, until I trigger the "start climate control" command.
Then CAN2 stops receiving. (and "possible theft" message
occurs). Car is 2016 Leaf. </div>
<div class=""> </div>
<div class="">Kind regards,</div>
<div class="">Stein Arne Sordal</div>
<div class="syno-mc-signature"> </div>
<div class=""> </div>
<div class="">
<div class="">On 2019-04-01 14:56, Mark Webb-Johnson <a class="moz-txt-link-rfc2396E" href="mailto:mark@webb-johnson.net" moz-do-not-send="true"><mark@webb-johnson.net></a>
wrote:</div>
<blockquote class="syno-mc-blockquote" style="padding-left:
5px; margin-left: 5px; border-left: #c8d2dc 2px solid;">So
this is with CAN2 not working?
<div class=""> </div>
<div class="">Err flags are 0x80001080. For MCP2515 that
is:</div>
<div class=""> </div>
<div class="">
<ul class="MailOutline">
<li class="">(intstat << 24) |</li>
<li class="">(errflag << 16) |</li>
<li class="">intflag</li>
</ul>
</div>
<div class=""> </div>
<div class="">So intstat = 0x80, errflag = 0x00, intflag =
0x1080.</div>
<div class=""> </div>
<div class="">The 0x10.. in intflag indicates that this
just ran:</div>
<div class=""> </div>
<blockquote class="" style="margin: 0 0 0 40px; border:
none; padding: 0px;">
<div class="">
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
// clear error & wakeup interrupts:</span></span></div>
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
if (intstat & 0b11100000)</span></span></div>
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
{</span></span></div>
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
m_status.error_flags |= 0x1000;</span></span></div>
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
m_spibus->spi_cmd(m_spi, buf, 0, 4,
CMD_BITMODIFY, 0x2c, intstat & 0b11100000,
0x00);</span></span></div>
<div class=""><span style="font-family: 'Andale
Mono';" class=""><span class="" style="font-size: 14px;">
}</span></span></div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">The instat=0x80 indicates "MERRF: Message Error
Interrupt Flag bit”. So that is a bus error, but the
errflag=0x00 so there are no indicated issues with
either the 96 or 128 successive errors hit. The
documentation (mcp2515 spec sheet) for this says:</div>
<div class=""> </div>
</div>
<blockquote class="" style="margin: 0 0 0 40px; border:
none; padding: 0px;">
<div class="">
<div class="">7.4 Message Error Interrupt<br class="">
<br class="">
When an error occurs during the transmission
or reception of a message, the message error
flag (CANINTF.MERRF) will be set and, if
the CANINTE.MERRE bit is set, an interrupt will be
gener- ated on the INT pin. This is intended to be
used to facilitate baud rate determination when used
in conjunction with Listen-only mode.</div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">I can’t see anything obviously wrong with that. Not
sure how to proceed. Perhaps we need a command to dump
all the MCP2515 registers? We could at least then see
the current state of the chip with all the gory
details.</div>
<div class=""> </div>
<div class="">Regards, Mark.</div>
<div class=""> </div>
<div class="">
<blockquote class="">
<div class="">On 1 Apr 2019, at 3:49 PM, ovms <<a href="mailto:ovms@topphemmelig.no" target="_blank" rel="noopener noreferrer" moz-do-not-send="true" class="">ovms@topphemmelig.no</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">Looks the same, see attachment.</div>
<div class=""> </div>
<div class="">-Stein Arne-</div>
<div class=""> </div>
<div class="syno-mc-signature"> </div>
<div class=""> </div>
<div class="">
<div class="">On 2019-04-01 09:38, Mark
Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank" rel="noopener noreferrer" moz-do-not-send="true" class="">mark@webb-johnson.net</a>>
wrote:</div>
<div class="">
<blockquote class="syno-mc-blockquote" style="padding-left: 5px; margin-left: 5px;
border-left: #c8d2dc 2px solid;">This is the
thread from last summer talking about CAN
bus lock-ups.
<div class=""> </div>
<div class="">I’m guessing this is still
happening for Leaf? Since the changes made
below (back then), I haven’t seen it in my
car.</div>
<div class=""> </div>
<div class="">Next time this happens to you
guys (can2 stopped), can you get a ‘can
can2 status’, wait 30 seconds, and repeat.
Then send it here for us to look at.</div>
<div class=""> </div>
<div class="">Regards, Mark.<br class="">
<div class=""><br class="">
<blockquote class="">
<div class="">On 7 Jul 2018, at 10:37
PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank" rel="noopener
noreferrer" moz-do-not-send="true" class="">mark@webb-johnson.net</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="" style="word-wrap:
break-word; -webkit-nbsp-mode:
space; line-break:
after-white-space;">I’m trying to
recreate this with my
three-can-buses-connected DB9
plugged in. Transmitting on CAN1
should make it appear on CAN2 and
CAN3.
<div class=""> </div>
<div class="">Here is what I see:</div>
<div class=""> </div>
<blockquote class="" style="margin: 0 0 0 40px;
border: none; padding: 0px;">
<div class="">
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">OVMS#
can can1 start active
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Can
bus can1 started in mode
active at speed
1000000bps</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">OVMS#
can can2 start active
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Can
bus can2 started in mode
active at speed
1000000bps</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">OVMS#
test cantx can1 25000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Testing
25000 frames on can1</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Transmitted
25000 frames in
6.466209s = 258us/frame</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;"> </span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">OVMS#
can can1 status</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">CAN:
can1</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Mode:
Active</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Speed:
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Interrupts:
24771</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
pkt:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
ovrflw:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
pkt:
24880</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
delays:
24703</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
ovrflw:
109</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Err
flags: 0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">OVMS#
can can2 status</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;"> </span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">CAN:
can2</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Mode:
Active</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Speed:
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Interrupts:
19084</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
pkt:
24770</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Rx
ovrflw:
1</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
pkt:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
delays:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Tx
ovrflw:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">Err
flags: 0x2040</span></span></div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">Note the err flags
0x2040 on CAN2, but the bus
remains up and working fine.</div>
<div class=""> </div>
<div class="">Repeating the test
gives us:</div>
<div class=""> </div>
</div>
<blockquote class="" style="margin: 0 0 0 40px;
border: none; padding: 0px;">
<div class="">
<div class="">
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">OVMS# test
cantx can1 25000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Testing 25000
frames on can1</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Transmitted
25000 frames in
6.479670s =
259us/frame</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;"> </span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">OVMS# can can1
status</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">CAN: can1</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Mode:
Active</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Speed:
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Interrupts:
49546</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx pkt:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx ovrflw:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx pkt:
49771</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx delays:
49417</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx ovrflw:
207</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Err flags: 0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;"> </span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">OVMS# can can2
status</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">CAN: can2</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Mode:
Active</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Speed:
1000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Interrupts:
38288</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx pkt:
49545</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Rx ovrflw:
3</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx pkt:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx delays:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx err:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Tx ovrflw:
0</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">Err flags:
0x2040</span></span></div>
</div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">Looking at the
mcp2515 code, it seems that
Err flags are only stored "if
(intstat & 0b10100000)”.
That is "ERRF 0x80 = message
tx/rx error” or "ERRIF 0x20 =
overflow / error state
change”. It is also set to
"(intstat & 0b10100000)
<< 8 | errflag”, so
doesn’t show all the error
statuses. It is hard to rely
on that for other
errors/status on lock-up.
Given that error_flags is a
uint32_t, I think we can store
more in it to allow for better
diagnosis.</div>
<div class=""> </div>
<div class="">I changed the
mcp2515 driver to always set
error_flags, on each interrupt
handled (except spurious
interrupts with no flags
found), as follows:</div>
<div class=""> </div>
</div>
<blockquote class="" style="margin: 0 0 0 40px;
border: none; padding: 0px;">
<div class="">
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size: 14px;">SSSSSSSSFFFFFFFF***EB01TLLLLLLLL</span></span></div>
<div class="">
<ul class="MailOutline">
<li class=""><span class="" style="font-family:
'Andale Mono';
font-size: 14px;">SSSSSSSS
= intstat</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">FFFFFFFF
= errflag</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">B =
RXB0 or RXB1 overflow
flags cleared</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">0 =
RXB0 overflowed</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">1 =
RXB1 overflowed</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">T = TX
buffer has become
available</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">E =
Error/WakeUp flags
were cleared</span></li>
<li class=""><span class="" style="font-size:
14px; font-family:
'Andale Mono';">LLLLLLLL
= intflag</span></li>
</ul>
</div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">I did find a
problem on line 300: if
(intstat & 0b10100000). It
think that should be
0b11100000 (to also pickup the
RXB0 overflow), and removed
the m_status.rxbuf_overflow++
from RXB0 overflow (as it is
not really an overflow - as
RXB1 got the data).</div>
<div class=""> </div>
<div class="">With those changes
made, I get:</div>
<div class=""> </div>
</div>
<blockquote class="" style="margin: 0 0 0 40px;
border: none; padding: 0px;">
<div class="">
<div class="">
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;">OVMS# test
cantx can1 25000<br class="">
Testing 25000 frames
on can1<br class="">
Transmitted 25000
frames in 6.389849s =
255us/frame</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;"><br class="">
OVMS# can can1 status<br class="">
CAN: can1<br class="">
Mode: Active<br class="">
Speed: 1000000<br class="">
Interrupts:
24777<br class="">
Rx pkt:
0<br class="">
Rx err:
0<br class="">
Rx ovrflw:
0<br class="">
Tx pkt:
24884<br class="">
Tx delays:
24739<br class="">
Tx err:
0<br class="">
Tx ovrflw:
116<br class="">
Err flags: 0x00000000</span></span></div>
<div class=""><span class="" style="font-family:
'Andale Mono';"><span class="" style="font-size:
14px;"><br class="">
OVMS# can can2 status<br class="">
CAN: can2<br class="">
Mode: Active<br class="">
Speed: 1000000<br class="">
Interrupts:
18935<br class="">
Rx pkt:
24777<br class="">
Rx err:
0<br class="">
Rx ovrflw:
0<br class="">
Tx pkt:
0<br class="">
Tx delays:
0<br class="">
Tx err:
0<br class="">
Tx ovrflw:
0<br class="">
Err flags: 0x01000001</span></span></div>
</div>
</div>
</blockquote>
<div class="">
<div class=""> </div>
<div class="">I don’t think I’ve
fixed anything (apart from
that minor issue with RXB0
overflow diagnostics), but
hopefully the new error_flags
display should help finding
out what is causing this
lockup. Hopefully I haven’t
broken anything.</div>
<div class=""> </div>
<div class="">Regards, Mark.</div>
<div class=""> </div>
<div class="">
<blockquote class="">
<div class="">On 7 Jul 2018,
at 10:42 AM, Tom Parker
<<a href="mailto:tom@carrott.org" target="_blank" rel="noopener
noreferrer" moz-do-not-send="true" class="">tom@carrott.org</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">On 07/07/18
00:05, Mark Webb-Johnson
wrote:<br class="">
<blockquote class="">Err
flags 0x2040. The 0x20
part is the error
interrupt. The 0x40
part is "RX0OVR:
Receive Buffer 0
Overflow Flag bit”.<br class="">
<br class="">
Where the number on
‘can can2 status’
moving at all? Or
completely stuck?</blockquote>
<br class="">
None of the can can2
status numbers change
when the can bus is
broken. After power
cycling it they move.<br class="">
<br class="">
<blockquote class="">Seems
different than the
fault Greg and I are
seeing. This one
likely to be interrupt
flag, or buffer
overflow, not being
cleared correctly. I’m
guessing the overflow
because that just
doesn’t seem correct
in
mcp2515::RxCallback().
I’ll focus on that and
have a look.</blockquote>
<br class="">
I just checked the car
again and it stopped
with Rx ovrflw number
only 1281, half what it
got to last time.<br class="">
<br class="">
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