Re: What are you doing if the TX buffer overflows?

[Jason White <white_jason_r1@cat.com>]

Kurt Van Dijck <kurt.van.dijck <at> eia.be> writes:

> > 
> > Officially the TX-timeout has been removed as the controller just sends out
> > the CAN frames, when it comes back to life ...
> > 
> > The question is, if the controller gets into the BUS_OFF state and if the
> > restart-ms option (see ip tool) would help here.
> FYI:
> A CAN chip that sits alone on a proper bus, trying to transmit a frame,
> will never go into BUS_OFF. It can only go in BUS_OFF when a bad network
> is encountered, i.e. the chip does not see it's TX activity on its RX.
> 
> I think this scenario (chip alone, going in BUS_OFF) is no different
> than regular BUS_OFF, and should be treated likewise.
> > 

This sounds like something I would be interested in.  Just a couple of
questions.  What do you mean TX-timeout has been removed?  Also does
it work in error passive state (scenario where the ECU is alone on
the bus - no ack from another ECU).  Does it just reset the CAN
hardware or does the queues get flushed as well?

Jason