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C6657 mcbsp的寄存器RFIFOCTL和WFIFOCTL配置问题



FIFO使能,寄存器RFIFOCTL的RNUMEVT和RNUMDMA均配置为1,音频播放正常;将RNUMEVT改为其他值,无音频数据播放,表象为DMA没有搬运数据。请教RNUMEVT配置需注意什么,这种现象可能和什么有关,谢谢