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读取ina226电流

Other Parts Discussed in Thread: INA230, INA226

用逻辑分析仪试了,i2c通信没有问题,发送的数据都对,电流值应该是3mA,读回来的值是5mA,改变校准寄存器的值,电流没有变化,实际给的电流变小,返回电流值也会变小,这是什么问题?