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C5502音频左右通道传输问题



我现在在用5502开发板进行音频开发,我现在希望通过line in口输入两路音频信号,看了很多网上的例子,都是通过DMA和McBSP来进行pingpong传输,想知道如果不用DMA,直接通过McBSPread语句读取信号,能不能实现左右通道数据的分离呢?如果能够分离,line in口又是怎样读取左右通道数据的呢?也是交错着读取的吗,数组的偶数位为左通道,奇数位为右通道这样的吗?