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ADSP-21489 periodic DMA

Question asked by Sinalux on Jul 9, 2012
Latest reply on Jul 12, 2012 by Harshit.Gaharwar



I was reading the DMA section of ADSP-214xx Sharc Processor Hardware Reference and I didn't understand one thing. In page 3-13, Chained DMA paragraph, it is written that DMA can be set continuous or periodic. What I would like to know is, how do I configure DMA to be periodic? And how can I control de periodicity?


Another doubt I have is about the DMA trigger. Can i configure the DMA to acquire, for example, 100 word and control each acquisition with an interrupt trigger signal? Or I just can trigger the acquisition on the first time?