Re: flexcan napi poll and error frames

[Steffen Rose <ro@emtas.de>]

Hello,

Am Freitag, 24. Oktober 2014, 16:04:56 schrieben Sie:
> > We can do little if the CAN controller does not notify the Software
> >> via interrupt.

> > Yes, that's why I wanted to figure out if it's a controller problem or
> > not.
> > Turns out it's a controller problem, but perhaps we can work around it?
> > E.g. if we check esr for state changes every time someone transmits a
> > frame, both of these problems would go away. Would it be unacceptable
> > overhead to do so?
> 
> I've just confirmed that this "fix" works, but only if berr-reporting is
> enabled.

Is this workaround working in case of an open CAN Bus?
(Ack error situation)

The flexcan can generate an error interrupt after every CAN bus error. But in 
case of an error situation the interrupt load would be very high (e.g. short 
circuit of the CAN).

-- 

Mit freundlichen Grüßen

Steffen Rose
www.emtas.de