一个用GPIO实现I2C接口进行数据通讯的例子，

SiLabs c8051f320 firmware for USB/i2c/spi/gpio/adc

Version: V2.0 for CL6017S * Descr iption: the reference code include I2C protocol between FM tuner and MCU of main chip * by GPIO method, and how to implement FM tuner power up initialization/power down/tune/seek * functions-Version: V2.0 for

通过GPIO口，模拟I2C协议，和设备进行I2C通信-I2C communications via GPIO ports, analog I2C protocol, and equipment

GT911 GT9157等的linux或ANDROID驱动文件，文件可以直接使用，配合移植操作手册使用，这个是源代码(V2.4 2014/11/28, - device tree support, gpio and cfg can be parsed form either dts or the header file. - new wake-up method, support frame buffer(CONFIG_FB), i2c pm(CONFI