MSP432P401R: Pausing DMA Transfer

John Lowe31

Part Number: MSP432P401R

Hi folks,

I'm using the DMA to load an eUSCI to send a data block, but need to pause the DMA if requested by the remote device. What is the recommended way of pausing the DMA transfer such that it can be continued at a later time? Setting the relevent flag in the DMA_REQMASKSET register seems a possibility.... or just disabling the DMA channel in the DMA_ENACLR register, although I'm not sure if the transfer can then be continued...

Any advice appreciated!

Thanks, John

over 8 years ago

0 Amit Ashara over 8 years ago

TI__Guru**** 244440 points

Hello John,

The DMA is not meant for start-pause-continue-stop operation. The reason why I am saying so is because if there is a transfer which is ongoing then what happens to the transfer in the whole scheme of channel configuration may be indeterministic. The DMA_REQMASKSET may be an acceptable method to "pause" a transfer.

0 John Lowe31 over 8 years ago in reply to Amit Ashara

Intellectual 370 points

Thanks for your reply, Amit. I'll have a go at pausing a transfer with DMA_REQMASKSET and see what happens....

Best wishes, John

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MSP432P401R: Pausing DMA Transfer