[Ovmsdev] Extended CAN Frame support on CAN2/3

Mark Webb-Johnson mark at webb-johnson.net
Tue Oct 10 08:21:36 HKT 2017


Looks good. I’ve merged it in.

Regards, Mark.

> On 10 Oct 2017, at 4:20 AM, Greg D. <gregd2350 at gmail.com> wrote:
> Hi folks,  (Mark, in particular),
> I've tweaked the mcp2515.cpp code to support Extended CAN frames on CAN
> 2 & 3.  Needed this for the OBD2ECU code, but it's there for anyone else
> who may want it.
> Mark - I did a bit of this by trial & error, since some of what I was
> doing wasn't working as I expected it would.  Bits upside down, that
> sort of thing...  So I expect some of the middle bits around the three
> frame flags is wrong, particularly on the transmit side, but for the
> PIDs I use, the results I get match what Wireshark decodes.  So, I think
> it's close.
> Greg
> p.s.  Got my first CAN 3 bus hang too...  hope it's not related. :)
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