Okay, this is an interesting option, if I understand what the intention=20
is.  CAN is differential, but I know the MCP2551 has RX and TX pins.  So=20
if I feed it a high or low TTL voltage, it will send the correct CANH/L=20
signal pair accordingly?  And it will also handle bidirectional comms on=20
that line to send me back a high or low TTL voltage?

I don't want to mess with firmware anymore, so really want this to be a=20
hardware-only change.



On 12/2/2014 10:58 AM, Denny Esterline wrote:
> I suspect you could misuse and abuse several different types of
> transceivers for this application.
> RS232 / 485 / CAN come to mind. All designed for various noise immunity a=
nd
> tolerance levels. Not suggesting you use the actual protocol, but just th=
e
> physical link with your data protocol.
>
> Personally, I'm fond of CAN. As to a specific part recommendation...
> MCP2551.
>
>
> -Denny

--=20
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