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CAN message repeats flood bus

Question asked by David Pekin on Mar 12, 2018
Latest reply on Mar 13, 2018 by AvaTar

Hello,

 

I have a system using the CAN bus with a STM32F303 talking to a motor controller and a STM32F722 silently monitoring the F3 / motor controller communications.  It seems to work relatively reliably.

 

While bringing up the system, I noticed that sometimes the F3 would send a command and then unexpectedly that command would be repeated on the bus a bazillion times about as fast as is possible on the CAN bus.  I'd need to reset the F3 to stop the TX repeats.   I suspect there's a wiring or terminating resistor issue but am not exactly sure at this point. 

 

Is continued TX retries typical CAN modality when a TX fails?  If so, is this configurable in the HAL CAN implementation?

 

Thanks.

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