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TMS570LS3137: Question about ADC DMA Transfer

li qunxiong
Intellectual 335 points
Part Number: TMS570LS3137

Hi,

ADC has 3 DMA transfer methods,I wonder if Block DMA Transfer and Conversion End DMA Transfer can be enabled together?

Thanks.

  • 0
    TI__Guru**** 197356 points

    Hi,

    A hardware DMA request can trigger either a frame transfer or a block transfer. It is configured by setting the TTYPE bit in the Channel Control Register. 

    The ADC DMA request can be generated:

    1. When each ADC conversion result is written to ADC group memory

    or

    2. When ADC has written block of data to ADC group memory

    or 

    3. When ADC has completed the conversions for all channels scheduled for conversion

    Why do you want to enable both DMA requests? I don't suggest to enable #2 and #3 at the same time.