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AM5708: DSP的EDMA,怎么配置,触发256次后才进中断

Part Number: AM5708


edmaParam.aCnt     = 2;
    edmaParam.bCnt     = 8;
    edmaParam.cCnt     = 256;
这三个值,如下配置是否正确?
edmaParam.destCIdx
的值呢,是不是应该是  acnt * bcnt