这个是对嵌入式设备的帧缓冲进行不断刷新显示，其作用相当于PC机的显卡，这个可以很好的帮助显示学习-This is to constantly refresh the frame buffer of embedded devices, its effect is equivalent to the PC graphics card, this can be a good help show to learn

LCD驱动，linux环境，利用frambuffer来写-LCD driver, linux environment using frambuffer to write