嵌入式系统作业。本实验是编写程序，控制实验平台的发光二级管LED1、LED2、LED3、LED4，使它们有规律地点亮和熄灭。-Embedded operating system. The experimental procedure is the preparation and control platform of the two luminescence LED1, LED2, indicates that LED4. make them a regular and off-site.