Re: CAN Ack Error with filtering on / CAN / Controller Area Network / filter

lyleboys@xxxxxxxxx wrote:
That is my experience as well, that the filtering happens after the
message receive and ack.

BUT, I couldn't find that specified in the CAN spec downloaded from
Bosch.

Rather than chip specific info, I was wondering if the _the spec_
dictates whether filtering affects generation of the ACK.

The hardware seems to do as you say, generate the ACK independent of
filtering, but is that only chip by chip? Or is there a specified
behaviour?

thanks

I don't recall the filtering even being mentioned by the Bosch spec -- AFAIK it's just a really cool feature of the first CAN controller chip that everyone else adopted.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/
.

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