AVR 单片机上实现SD卡的读写，支持FAT16、FAT32文件系统，文件和目录的创建删除等文件功能全部实现-AVR single-chip implementation on SD card reader, support for FAT16, FAT32 file system, files and directories to create the delete function and other documents of all implementation

基于avr与VB上位机通讯的智能图书管理系统。能实现从电脑上选书后系统自动快速实现取书功能。-aldkfaoiov alkfvjaoidf as,cvnal fa lv