基于单片机的单行道红绿灯仿真xiaoxiaoyunz的博客-

仿真结果是红灯会亮30秒，黄灯5秒，绿灯20秒，每个led在最后5秒都会闪烁。按下中断按键是直接全灭（包括倒数数码管），按复位键即可重新开机。

代码

#include<reg52.h> #define uchar unsigned char #define uint unsigned int sbit red=P0^0;  sbit yellow=P0^1;  sbit green=P0^2;  uint x,y; uchar i; uchar count; uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; /*ÑÓ³Ùº¯Êý*/ void delay(uint time) { for(x=time;x>0;x--) { for(y=110;y>0;y--); } } void zhongduan() interrupt 0 { red=1; yellow=1; green=1; P1=0x00; P2=0x00; while(1); } void daoshu() {    red=0;  yellow=1;  green=1;  count=30; for(i=25;i>0;i--) {      count=count-1;   P1=table[count%10];   P2=table[count/10]; delay(1000); }; for(i=5;i>0;i--) {    count=count-1;   P1=table[count%10];   P2=table[count/10];    red=1; delay(500);    red=0; delay(500); } ;      red=1;  yellow=0;  green=1;  count=5; for(i=5;i>0;i--) {    count=count-1;   P1=table[count%10];   P2=table[count/10];    yellow=1; delay(500);    yellow=0; delay(500); } ;    red=1;  yellow=1;  green=0;  count=20; for(i=15;i>0;i--) {     count=count-1;   P1=table[count%10];   P2=table[count/10]; delay(1000); }; for(i=5;i>0;i--) {    count=count-1;   P1=table[count%10];   P2=table[count/10];    green=1; delay(500);    green=0; delay(500); } } void main() { IT0=1;  EX0=1;  EA=1; while(1) { daoshu(); } }