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Original question:

TMS320F280025C: LIN SCI Mode - Multi buffer enabled, 3-bit Counter and 3-bit Compare registers are not found in the device...

TMS320F280039C: LIN SCI mode resetting the 3-bit counter

Hang Yang
Intellectual 2026 points
Part Number: TMS320F280039C

Tool/software:

Hi Experts,

My customer would like to reset this 3-bit counter, but they can't find it in the register map. May I know where we can find the register map and how to reset this counter?

Regards,

Hang

  • 0
    TI__Mastermind 20440 points

    Hello,

    This is an internal counter to the module without read/write access (it is essentially how the LIN module tracks how many elements are written). If the customer wants to clear it, I believe they would have to reset the LIN module/registers. Is there a specific reason they need to clear it?

    Best Regards,

    Allison

  • 0 in reply to Allison Nguyen
    TI__Intellectual 2026 points

    Hi Allison,

    So resetting the module can reset it to 0, right? I am not sure because I can not check the "reset" value in the register map.

    Sometimes their SCI would miss some frames, and there would be a "offset" remaining in the counter when the next transfer comes, resulting in a data offset after DMA transfer. They want to eliminate the offset by resetting the counter when it's idle. 

    Regards,

    Hang.

  • 0 in reply to Hang Yang
    TI__Mastermind 20440 points

    Hello,

    Are you seeing any error flags getting set when the data frames are missed? You could then trigger an interrupt based on this to reset the LIN module in this case. 

        //
        // Reset LIN module
        // Release from hard reset
        //
        LIN_disableModule(base);
        LIN_enableModule(base);

    What is the desired condition to reset the LIN? Is there a known reason why the data packets are being missed? It would be good to understand why this is occurring.

    Best Regards,

    Allison

  • 0 in reply to Allison Nguyen
    TI__Intellectual 2026 points

    Hi Allison,

    Thanks for the method of resetting! customer is trying the method.

    The data is missing because of the partner, but we don't we exact reason yet. 

    Regards,

    Hang/

  • 0 in reply to Hang Yang
    TI__Mastermind 20440 points

    Hi Hang,

    Sounds good! Let me know if there is any further update or debug done by the customer. 

    Best Regards,

    Allison