我使用一个8168做spi主,另外一个做spi从,使用pio模式可以正常接收。但加入dma后,将dma传输字节数设置为1时,可以成功调用一次回调函数,第二次时就会卡死,不能调用回调函数。传输字节数为2时,回调函数一直不会被调用。请问问题会出在哪?我看mcspi中写着ti81xx works only in pio,难道是8168的spi不支持dma?
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