如附件,发送读电压command 0x04,没有ACK
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从波形来看,确实在发送04的时候就没有了NACK。所以需要首先确认下441本身是否正确的启动了?主机的I2C采用的是什么机制,自带的I2C模块还是IO模拟?频率是多少?
最好是能够有示波器的真实的波形。另外最好是能够用TI的工具对比一下。