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CC2745R10-Q1: CAN BUS recv ID0 ERR

min wu
Prodigy 60 points
Part Number: CC2745R10-Q1
Other Parts Discussed in Thread: TCAN4550

Tool/software:

hello，

When I use CC2745r10 CAN-FD, I do not send any data to can bus, but I found can tools recv ID0 , and DLC is 0 too.

can setting:

can tool device setting:

error happen:

sdk and example informations：simplelink_lowpower_f3_sdk_9_10_00_83\examples\rtos\LP_EM_CC2745R10_Q1\drivers\canInitiator

why this happen？

Thanks！

  • 0
    TI__Genius 14785 points

    Hello,

    Do you mind rephrasing your question? What is the issue? Are you having trouble sending data over CAN?

    Best,

    Nima Behmanesh

  • 0 in reply to Nima
    Prodigy 60 points

    Hi Nima

    I did not send data to the CAN bus through the CAN module of CC2745, but the CAN bus received a packet with ID 0, suspecting that CC2745 was sent by the underlying driver under special circumstances.The following figure shows the data packets received by the CAN bus.

    Best regard!

  • 0 in reply to min wu
    TI__Genius 14785 points

    Hello,

    Let me reach out to the R&D team and see if I can get any information regarding this. Please allow me a couple of days to look into this.

    Best,

    Nima Behmanesh

  • 0 in reply to Nima
    TI__Genius 14785 points

    Hello,

    The CC2745 CAN driver does not send any data packets without the developer sending them explicitly. This activity on the bus may be coming from another device or the CAN driver is misconfigured.

    Best,

    Nima Behmanesh

  • 0 in reply to Nima
    Prodigy 60 points

    Hi Nima,

    1.CAN system only have CC2745 and Gcan tool, and GCAN is only used as a receiver. Previously, using cc2642+TCAN4550 and Gcan tool did not have this issue.

    2.CAN driver is misconfigured？For example, which configuration may cause this issue？The following figure shows the configuration of CAN,

    Best,

    Will

  • 0 in reply to min wu
    TI__Genius 14785 points

    Hello,

    The CAN stacks on both the CC2745 and CC2642 are very simliar. Do you mind attaching an analyzer on the analog in and digital out lines? Additionally, do you mind checking the terminations on the GCAN side as well?

    Best,

    Nima Behmanesh