1.USB agreement, hardware architecture, C51 source 2.SD original code of the read-write driver

USBandSD
........\SDcardDrive
........\...........\SD卡读写源程序
........\...........\..............\SD
........\...........\..............\..\sdcmd.c
........\...........\..............\..\sdcmd.h
........\...........\..............\..\sdcrc.c
........\...........\..............\..\sdcrc.h
........\...........\..............\..\sddriver.c
........\...........\..............\..\sddriver.h
........\...........\..............\..\sdhal.c
........\...........\..............\..\sdhal.h
........\...........\..............\sdconfig.h
........\...........\..............\使用说明.txt
........\USB Drive
........\.........\4 USB設備架構.rar
........\.........\6 源码_C51.rar

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