On 03/28/2011 04:05 PM, Georgy Lukonin wrote:
> Hello!
> 
> Currently there is a problem if two programs trying to access the socket.
> In my case the one program sends only few packets over the CAN. The
> another one sends a huge amount of packets. This causes a frequently
> reset of the device and the lost of messages in the buffer. 

What makes you think that the device has been resetted?

> I get this messages:
> 
> can: chip_stopped
> can: at91_close
> at91_can at91_can: bitrate error 0.3%
> at91_can at91_can: writing AT91_BR: 0x000a0122
> can: chip_started!
> can: at91_open
> 
> 
> What is the best way to avoid this behaviour? How can I check if there
> are any free buffers available?

You should check the return code of the send/write function and retry it
it returns -ENOBUFS (after some delay). Or are you doing that already?

Wolfgang.


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