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can bus message vanish

Nilesh Deshmukh
Prodigy 10 points

Respected Sir,
           I am working on DSP281x for can protocol. I have can bus communication between 3 devices. One is Texas instrument DSP281x controller and Two are Dspic30f4011.
           Texas instrument DSP281x controller is always asking data from 2 Dspic30f4011.I am working on the 1 mbps baud rate. It is working fine. But some time one of message from Texas instrument DSP281x controller to Dspic30f4011 is not transferring and none of the controller getting any kind of error. Somehow data gets vanish. On next message every thing start properly.
I am not able to understand this problem. Please help me to solve this problem.

Regards’,
Nilesh

  • 0
    Prodigy 110 points

    Hi,

    CANbus module on 281x devices is affected by a silicon bug that causes massages to be read from mailboxes as all zeros under certain conditions: is your code using the software workaround suggested in the silicon errata documentation?

    I've used the CAN with DSP2812 devices and with that workaround and I had no difficulties in make them work connected on a bus with Atmel AVR devices.