此程序是I2C操作平台（主方式的软件平台）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。-This procedure is I2C platform (the main mode of the software platform) the bottom of the C subprogram, such as the send data and receive data, send response bit