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msp432 DMA

ser str
Prodigy 240 points
Other Parts Discussed in Thread: ADS8548

Hi guys,

i have a question about the dma module and it's possibilities.

list of devices: msp432, ADS8548

1. ADS8548 is a 8 channel, 14 bit, external, ADC with the output on Port A  (P1.0 - P2.7)

- is it possible to configure the dma module for continuous read/write out of that Port ...i can't find anything about that in the datasheet

Best regards

  • 0
    TI__Mastermind 25045 points
    Hello,

    So it seems like you are planning to use the parallel interface in the ADS8548 and connect it to the MSP432 thru the Port A, am I correct??

    If that is the case you could still use the DMA with some kind of trigger factor (source), a timer or the DMA External Trigger for example. To be honest it might be easier to use the DMA + Serial interface, but I'm assuming that you are looking to get the maximum throughput rate and that is why you are looking to use the Parallel Interface, am I right??

    I'll check internally to find out if we have done something similar in the past with a MSP.

    Best regards,

    David
  • 0 in reply to DavidL
    Prodigy 240 points
    Hi David,
    first at all thanks for your effort
    and second, yes you're right i'm using the parallel interface in the ADS8548 and i need the max throughput rate.
    Regards,
    Sergej
  • 0 in reply to ser str
    TI__Mastermind 25045 points
    Hi Sergej,

    Unfortunately we do not have any pre-existing solutions that are a direct match to this use case.

    Again, if the external ADC chip has a GPIO line that can toggle every time there is a new sample, it could potentially use that as the external trigger for the DMA

    Regards,

    David

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