USB芯片CH375 的U 盘文件级子程序库说明，并提供了U盘文件级子程序库.-USB chip CH375 U disk file level subroutine library shows, and provided a U disk file level subroutine library.

这是一个CH375读写U盘文件的例子程序,使用I/O模拟spi来实现的.-This is a U disk to read and write documents CH375 example, the use of I/O simulation spi achieved.