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TMS320F28388D: Question about eQEP module

Green Deng
Expert 4490 points
Part Number: TMS320F28388D

Dear team:

My customer wants to know how to clear the QCTMR register to 0 after UTIME is enabled?

Best regards

  • 0
    TI__Genius 15385 points

    Hi,

    QCTMR is R/W register, so you can just write "0" to it if you want to clear. Also it clears on SYSRSn (reset).

    Best Regards,

    Nirav

  • 0
    Prodigy 20 points

    Though QCTMR is R/W register,write "0" to it doesn't take effect. The QCTMR is still run from the Register monitoring interface. Here is the source code.

    EQEP_Test();    //just configure EQEP1,such as configure  CTCU and enable EPEQ1
    while (1)
    {
    HWREGH(EQEP1_BASE + EQEP_O_QCTMR) &= 0U;
    }

  • 0 in reply to Liu Lining
    TI__Genius 15385 points

    Yes, when the counter is running writes to this register are blocked to prevent unexpected behavior. Can you please explain why you are trying to write to this register in middle of the application running?

    Best Regards,

    Nirav

  • 0
    Prodigy 20 points

    A special algorithm may need this action.

    When the counter is running ,how to make it stopped, and then write to this register