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BQ25120使用I2C写值失败

Other Parts Discussed in Thread: BQ25120

我在使用BQ25120时,用I2C往芯片寄存器中写值,但是写不进去,I2C写入函数的返回值时-1,往寄存器中写值写不进去。我在写值之前把CD引脚拉低了。我不清楚为什么I2C写不进去值也读不出来值,在线等...