功能：arm系列开发板，linux系统下的截屏程序，直接对FBdev设备进行读写，保存为bmp格式的图片。对arm开发板的嵌入式用户很有用处，因为在arm lilnux中没有截屏命令。-Function: arm Series development board, linux system under the screen capture programs, read and write directly to FBdev equipment, save as bmp format images