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从波形图来看,每个字节发送完后就将CS拉高,CS拉高意味着该次通讯结束,CS拉低表示下次通讯的开始,这样器件接收到的字节被认为是地址字节,导致通讯不正常。
对DS3234进行通讯时,要先将CS拉低,然后发送地址字节,该字节的最高位为读写位,如果写操作,就要再接下来发送写入的数据,读操作时发送时钟读取数据,等所有操作完成后再将CS拉高。