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TCAN1145-Q1: Error counter exception

Colin Chen
Intellectual 825 points
Part Number: TCAN1145-Q1

Tool/software:

Dears,

After the chip enters sleep monitoring mode, There are only about 5 error frames in the CAN network, but the error count of the CAN chip has reached the threshold of 250, which is much higher than the actual error frame count. Could you please advise on the reason for this situation? There have been no issues during previous testing, but after testing on the vehicle, the problem occurred

  • 0
    TI__Guru 53555 points

    Hi Chen,

    How are you detecting error frames on the CAN bus? Is this only what is being reported by the active CAN controllers in the system? 

    The SW_CONFIG_1 configuration here (h80) has SW_FD_PASSIVE enabled and the CAN data rate set to 50bpbs. Is this the correct data rate for the system? Is there a mix of CAN and CAN FD frames being transmitted on the bus during this test?

    It looks like the FRAME_OVF flag is not being set in this case. Is the FRAME_CNTx field in SW_CONFIG_2 set to the maximum of 255 (hFF)? If so I am surprised you caught the system at a count of 250. If the system were to run for longer would the TCAN1145 wake up and set the FRAME_OVF interrupt? 

    Regards, 
    Eric Schott

  • 0 in reply to Eric Schott1
    Intellectual 825 points

    Hi Schott,

    The SW-CONFIG signal is not the value of the SW-CONFIG_1 register, it is only used to determine the completion of configuration.Currently, the SW-FD­_PASSIVE configuration in SW-CONFIG_1 is 1, ignoring the CANFD frame.

    This abnormal phenomenon occurs occasionally, and the phenomenon is that after the car key KEY_Flag is powered off, the CAN wake-up can be stable, but there is a certain probability that the CAN wake-up cannot be achieved when it is used again. Currently, it only occurs in some Specific vehicle models test.

    For more information, please refer to the email I sent you, email address Colin.Chen@arrow.com

    Regards, 
    Colin

  • 0 in reply to Colin Chen
    TI__Guru 74252 points

    Colin,

    Please keep the conversation on E2E, and share the extra information you sent to Eric Schott in this thread. If it is sensitive information, please add me to the email thread.

    Regards,

    Eric Hackett