The red green displaying is controlled by circulative display module, and changing the Cyc by the interrupting module, driver the bar display LED red green light by LED driver module.

• 系统通过循环程序完成红绿灯各步的循环显示，通过中断处理程序红绿灯周期随时间的变化，通过LED驱动程序完成条图显示方法的实现。