自己用STM32做的一个PDA，可以实现触摸，电子书，图片浏览，画图功能，采用了FatFs文件系统。-Own to do with the STM32 a PDA, touch can be achieved, e-books, picture browsing, drawing functions, using the FatFs file system.

第二版本的PDA，相对于前一版本，加入了外部SD卡字库的读取和JPEG图片的解码。-The second version of the PDA, compared to previous versions by adding the external character of the reading and decoding JPEG image.