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mcasp数据传输问题



采用Transfers Through the Configuration Bus配置mcasp端口,mcasp的两个数据端口都配置为DIT模式,CPU轮询方式写入XBUF0和XBUF1数据,为什么两个端口发出的数据都是写入到XBUF0的数据啊,写入到XBUF1的数据没有发送