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TMS570LC4357: Does the LIN module provide loopback mode when it is configured for general-purpose I/O?

Andrew Harrington
Intellectual 445 points
Part Number: TMS570LC4357

Hello,

Does the LIN module provide loopback mode when it is configured for general-purpose I/O?

The following extract from the TRM implies that it doesn't.

Thank you.

  • +1
    TI__Guru 69891 points

    Hi Andrew,

    When you configure LIN pins into GPIO pins then you can't perform loopback. Instead of you can do the following things,

    Similar to the other GPIO pins, you can simply set the pin direction as output, set it high/low then read back on the input side to make sure it's matching. For additional error checking, on GPIO, you can also test for shorts by setting a pin high, the adjacent pin low, then readback both. Since we use zero dominant structures, if both read low, then the pins are shorted. This could also be applied to signals on board that are next to each other.

    --

    Thanks & regards,
    Jagadish.

  • 0 in reply to jagadish gundavarapu
    Intellectual 445 points

    Hi Jagadish,

    Thank you for your reply.

    Regards,

    Andrew