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如果既要发数据给926，又要接收926的IIC数据，那连接925的MCU的IIC部分程序是不是既要做主又要做从？
是的， 既可以发送也可以接收，对于数据传输来说，即做主页做从是符合I2C标准的。
连接925的MCU既要发送IIC，也要接收926发过来的IIC，那如何避免我要发的时候，926也要发，冲突的问题？
