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DMA problem

Greg_
Prodigy 60 points

After enabling DMA the corresponding bit in the CNTRL register remains zero  (DMA disabled)

What clock drives the DMA ?  I double checked my Clock mappinh and all clocks are enables

Any ideas ?

  • 0
    TI__Guru 59540 points

    Hello Greg,

    I have received your question and I am looking into it. I should have an answer for you early next week.

  • 0 in reply to Chuck Davenport
    TI__Guru 59540 points

    Hello Greg,

    When you elaborate on what steps you have taken to enable DMA? The 2 bits that you should be particularly interested in are the DMA_EN bit and the DMA_RES bit. DMA_RES should be 0 and then DMA should be enabled once you write a 1 to DMA_EN. If. If these are the steps you have taken, you may want to try forcing a DMA reset by writing DMA_RES from 0-->1 then back to 0. After reseting the module, then write a 1 to DMA_EN.

    If all of  your clock domains are enabled, this should not be a concern.