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在AD采集的正弦波数组中中如何截取一个完整的周期用于DA回放



我用AD采集正弦波中的800个点,存在数组中,但是由于不能够确定AD开始采样和结束采样的位置,通过DA连续输出的波形会存在衔接不上的问题,就像图片中的情况。如何能在数组组中截取一个完整的周期数据?