利用stm32实现了SD卡文件管理器，在触摸屏上进行操作。程序界面使用UCGUI制作，请自行添加stm32的库文件(太大不方便上传)。-The stm32 SD card file manager, operate on the touch screen. The program interface use UCGUI making stm32 library file (too inconvenient Upload), please add their own.