这个是关于在directfb中获取键盘的代码，如何根据驱动文件得到按键码值-This is about the directfb code to get the keyboard, how to get key code according to the value of driver files

使用SDL2.0进行视频显示，SDL2.0实现9键输入。-Use SDL2.0 video display, SDL2.0 achieve 9 key input.