单片机模拟控制交通灯程序，规则如下：当南北通车时，此时南北的绿灯亮，东西的红灯亮，之后南北的绿灯闪烁3次，过后黄灯亮，延时片刻，转东西绿灯亮同时南北红灯亮，之后东西的绿灯闪烁3次，过后黄灯亮，延时片刻；数码管显示的值都同步，结束。-After the green light flashing 3 times, after the yellow light, delay time, turn the green light at the same time north and south red light, after something green light flashing 3 times, after the yellow light, delay moment　digital display values are synchronized,