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我觉得是否先检查供电, 复位, 时钟, 数据连接等低级硬件问题.在来调试指令通信
电压在通信前测试过没问题 复位和时钟也都检测没什么问题，给ads1281输入电压后能读出转换后数据，而且各对应信号都能对应，就是读寄存器的值没反应
