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I2c通信如何设置寄存器地址



tm4c123 launchpad作为master时

i2c写操作要先输出device address,再给一个Register  Address,然后才能写

i2c读操作也要给定这两个地址才能读,

可是tivaware中i2c相关api似乎没有寄存器地址这个参数,该如何正确操作呢。