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TMS320F2812: EVA capure issue

Hardy Zhou
Intellectual 1650 points
Part Number: TMS320F2812


My customer finds that the bit  EvaRegs.EVAIFRC.bit.CAP2INT is accidentialy cleared when they clear the bit EvaRegs.EVAIFRC.bit.CAP2INT, i check the EV reference guide, but can not find clue to the relationship between the two clear action, any comments for this issue? thanks.

http://www.ti.com/lit/ug/spru065e/spru065e.pdf

 

  • 0
    TI__Mastermind 42195 points

    Hardy,

              it looks like writing a 0 should have not effect. Writing a 1 should reset the flag.

    Can you confirm my understanding of your post?...

    1. The customer reads the bit, sees a 1.
    2. The customer then writes a 0 to the bit.
    3. The customer reads the bit one more time and sees a 0.

    Regards,
    Cody

  • 0 in reply to Cody Watkins
    TI__Intellectual 1650 points
    My writing mistake, it should be that when I write 1 to clear EvaRegs.EVAIFRC.bit.CAP2INT bit , the EvaRegs.EVAIFRC.bit.CAP3INT is accidently cleared at the same time, i can not find any clue for why CAP3INT is cleared.
  • 0 in reply to Hardy Zhou
    TI__Mastermind 42195 points

    Hardy,

    CAP2INT and CAP3INT should be independent.

    When you write to CAP2INT are both CAP2INT and CAP3INT cleared, or just CAP3INT?

    If only one is cleared, you should check if you are writing to the correct bit. Are you using the TI provided headerfiles, have the header files been modified at all?

    Regards,
    Cody