LINUX下控制LED屏的驱动程序，可以实现内存映射功能-LINUX LED screen under the control of the driver, can be achieved memory mapping function

1. led点阵屏显示汉字。 2.实现显示的信息可以随时更改。 3.实现使用手机短信发送需要显示的内容-1 LED dot matrix display Chinese characters. 2 to achieve the display of information can be changed at any time. 3 to achieve the use of mobile phone text messages sent to display the cont