I2C操作平台的底层的C子程序,如发送数据及接收数据,应答位发送,并提供了几个直接面对器件的操作函数，它很方便的与用户程序连接并扩展-I2C operating platform Underlying C subroutine, such as the transmission data and reception data, the acknowledge bit is sent, and provides a directly face device operation function,