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Hi Marko,<br>
<br>
wow, now that's an intro :) Great work!<br>
<br>
If your MCP2515 driver changes are fully compatible with the base
hardware, or can be switched on by a config, we can merge them into
the master. Send a pull request when you think it's time for that.<br>
<br>
Some testing from developers using the MCP2515 buses would be good.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 18.07.19 um 10:14 schrieb Marko
Juhanne:<br>
</div>
<blockquote type="cite"
cite="mid:CAMmS7LpYZn4Wf_10VrSJ8M7MN4fcFc9xWs0sP53Tc3m1DtOwiQ@mail.gmail.com">
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<div dir="ltr">Hi all,
<div><br>
</div>
<div>I've been tinkering with OVMS and Opel Ampera these few
past months, and the I've made some progress with the SWCAN
support. </div>
<div><br>
</div>
<div>As you know, the SN65 transceiver cannot do High-Voltage
Wake Up, so many of the nice-to-have polling and remote
controlling functions are not available on those cars that
rely on it, such as Volt/Ampera. So I've created an add-on
SWCAN board that attaches to the internal OVMS extension
header. The board uses TH8056 transceiver, which is
specifically designed for SWCAN bus. As for the controller,
same MCP2515 is used as in OVMS.</div>
<div><br>
</div>
<div>Here's the link to the boards GitHub page: <a
href="https://github.com/mjuhanne/OVMS-SWCAN"
moz-do-not-send="true">https://github.com/mjuhanne/OVMS-SWCAN</a></div>
<div><br>
</div>
<div>For the firmware patches, here's my OVMS branch: <a
href="https://github.com/mjuhanne/Open-Vehicle-Monitoring-System-3"
moz-do-not-send="true">https://github.com/mjuhanne/Open-Vehicle-Monitoring-System-3</a></div>
<div><br>
</div>
<div>There are a lot of changes, especially MCP2515 code add-ons
and refactoring, of which some are specific to the new
swcan-bus, but some could be beneficial otherwise as well.
Then there's the support for the new board and TH8056. On the
other hand, if a car can be woken up without HV WakeUp, the
board is not really needed and the SN65 can be used with 33.3
kbps speed to communicate on SWCAN bus.</div>
<div><br>
</div>
<div>Since ESP32 supports only 3 hardware CS on one SPI bus and
all the CS lines are now already used, there's also patches
for software CS (that's what the additional MCP2515 is using).
With my OBD cable I wire SWCAN to use CAN2 lines and put the
2nd MCP2515 on OVMS to sleep, but there's no reason why all
the 4 CAN controllers couldn't work independently at the same
time (untested at this time).</div>
<div><br>
</div>
<div>There's also patches to the Ampera/Volt module code base to
include SWCAN support, add handling of several new CAN
messages (still work in progress, more to come!), as well as
VoltStar-like capabilities (locking/unlocking doors, remote
preheat) similar to Brian Batista's MyVolStar app/OBDLink
MX-combo. Sadly, I haven't been able to get the
VoltStar-specific functionality to work on my 2014 Ampera, but
other non-Voltstar SWCAN messages do work (waking up the car,
controlling windows etc.). This is is similar to other reports
of MyVolStar on 2014 Volt/Ampera, so maybe something has
changed in the ECU behaviour between MY13 and MY14. </div>
<div><br>
</div>
<div>It would be really nice to get other OVMS developers with
SWCAN/GMLAN enabled cars to test these. SWCAN specific patches
can be tested also without the board, but naturally the HV
Wakeup functionality is not available. Let me know if you're
interested so I can send a PCB or two for testing (I have
bunch of leftovers). </div>
<div><br>
</div>
<div>Best regards,</div>
<div>Marko</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</blockquote>
<br>
<pre class="moz-signature" cols="160">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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