FT311 USB转GPIO/SPI/IIC等 转换器安卓端程序，实现了安卓设备作为主设备的USB数据转SPI的功能-FT311 USB transfer GPIO/SPI/IIC other side converter Andrews procedures, the Android device as a master SPI USB data transfer function

带有安卓USB功能的例子程序，适合做底层开发的人员参考学习-Examples of programs with Android USB function, suitable for low-level development of reference learning