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Message doubling in CAN

Other Parts Discussed in Thread: TMS320F2808

Using TMS320F2808 in grid connected inverter and CAN controller is working fine. But some times,

the CAN controller is transmitting the same message twice in response to a message. The contents

of the messages are same.

Message Received:

7    01    12    00    C8    07   D0    55
Message Transmitted:

2    41    12    55    55    55    55    55
2    41    12    55    55    55    55    55

In CAN controller, if a message is corrupted (if there is no error until the end of the frame),

retransmission will follow automatically.

Would you please explain why the transmitter is sending the messages twice even though the

messages are same.

  • Hi, i was reading your post. I'm working with Tms320F2808 and a modem named USB CAN adapter of Peak. I can transmit a message that i want on the software PCAN-VIew and receive too, but my question is how i know if the data that i'm transmitting is save on F2808. Where and how can i see the messages on F2808.

     

    Thank you so much for your response

    Karol

  • Karol Jimena Bernal Cort��s said:
    I can transmit a message that i want on the software PCAN-VIew and receive too […]. Where and how can i see the messages on F2808.

    How do you receive messages from F2808 on USB CAN adapter? If you able to successfully transmit messages from F2808, you'll able to look at your ECANA_MBOX registers in CCS during debug session to find incoming messages.

  • I have almost the same problem. Did you found a solution ?