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TMS570LS3137: Do not detect CAN bus-off error

user4777395
Intellectual 480 points
Part Number: TMS570LS3137
Other Parts Discussed in Thread: HALCOGEN

I use TMS570LS3137.

Do not detect CAN bus-off error

I want to detect a Bus-off when Can3 bus beging  locked in dominant state.

but DCAN ES BOff is 0.

CAN 1, CAN 2, and CAN 3 are set to the same setting, but only CAN 3 is not detected.

  • 0
    TI__Guru 72500 points
    The three DCAN modules on the TMS570LS3137 are the same. If you are having difficulty detecting a bus-off condition on DCAN3, but not on DCAN1 or DCAN2, then there is a difference in either the software configuration or the hardware hookup.
  • 0 in reply to Bob Crosby
    Intellectual 480 points
    Hi,Bob.

    After calling CanTransmit, the value of CAN Control Register for CAN 1 is 0x00021403.
    However, in CAN 3, the value of CAN Control Register is 0x00031403.

    Do you think the reason why the InitDbg of the CAN control register is not changed?

    HALCoGen's CAN 1 General and CAN 3 General have the same settings.