振南嵌入式系统文件，帮助使用者快速掌握SD卡嵌入式开发。(Zhennan file to the embedded system, the embedded development to help users to quickly grasp the SD card.)

基于振南znfat嵌入式系统，对SD的读写进行开发。(Zhennan embedded system based on the znfat, SD read and write on the development.)