51单片机模拟仿真接口交通灯，倒计时12s,时间到亮LED灯，生成图片及代码

以下是该交通灯的电路连接图和代码：


代码如下：

#include <reg51.h>

sbit red_led = P1^0;  //红色灯
sbit yellow_led = P1^1;  //黄色灯
sbit green_led = P1^2;  //绿色灯

void delay(unsigned int time) //延时函数
{
    unsigned int i,j;
    for(i=0;i<time;i++)
        for(j=0;j<125;j++);
}

void main()
{
    while(1)
    {
        //红灯亮12秒
        red_led = 1;
        yellow_led = 0;
        green_led = 0;
        delay(12000);

        //绿灯亮12秒
        red_led = 0;
        yellow_led = 0;
        green_led = 1;
        delay(12000);

        //黄灯亮3秒
        red_led = 0;
        yellow_led = 1;
        green_led = 0;
        delay(3000);

        //绿灯亮12秒
        red_led = 0;
        yellow_led = 0;
        green_led = 1;
        delay(12000);

        //黄灯亮3秒
        red_led = 0;
        yellow_led = 1;
        green_led = 0;
        delay(3000);
    }
}

需要注意的是，以上是基于51单片机的模拟仿真环境实现的，实际应用中需要根据具体的硬件环境进行调整。