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Priority between core and DMAs

Question asked by jenson on Jan 13, 2012
Latest reply on Jan 13, 2012 by PrasanthR

Dear supporter,


My new project adoptes BF542 as our main processor. We noticed there is a "watermark" scheme in BF54x which is able to raise the PPI dma to most priority. That is, if a code developer wirtes certain code such as memset(p, 0, l) with a very large length l, it's would be fine for PPI DMA because the urgent DMA.

My question and problem is: how about the other DMA? e.g. Sport. If core occupies too much DDR bandwidth, it would block other DMA access.

Does BF54x has any solution for DMAs except PPI?


Wating forward to your feedback.