我在调试 mcasp 的edma3 时遇到如下问题:
在mcasp手册的“ Transfers through the DMA Port ”一章中有这样语句话“ if serializers 0, 4, 5, and 7 are set up as active transmitters, the DMA/CPU should write to the XBUF DMA port address four times with data for serializers 0, 4, 5, and 7 upon each transmit data ready event.
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我想问一下:对于DMA方式,如何让dma写四次呢?这样保证 0、4、5、7串行器都能获得数据。非常感谢!