psp游戏机上的SDK的开发例子，包括了2D,3D图形界面开发，声音的开发，WiFi，USB,debug串口，文件读写，sony光盘的读写-psp games on the development of the SDK examples, including 2D, 3D graphics interface development, Development of voice, WiFi, USB, serial debug, document literacy, sony CD-writabl