单片机读写U盘文件，实现大容量存储，支持FAT16/32，支持常用的遵循mass_storage的U盘，有高级函数接口，便于二次开发，提供所有C51源代码。 -Microcontroller U disk read and write files, mass storage support FAT16/32 support commonly follow U disk mass_storage, high-function interface for secondary developmen