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Also wondering if by some chance (or intent) he's fixed the issue
where the receiver stops working...<br>
<br>
Greg<br>
<br>
<br>
<div class="moz-cite-prefix">Michael Balzer wrote:<br>
</div>
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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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<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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