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DMA传输结束不进中断



注册了DMA中断:

初始化了DMA  memory-to-memory的数据传输:

传输正常,但传输完成后不会进DmaSwIntHandler()中断函数,试了下SDK的UDMA工程,此工程的 memory-to-memory传输与不会进DmaSwIntHandler()中断函数,请问为什么传输完成后不会进中断?怎么才能中断?