单片机交通灯汇编语言程序，只需红黄绿灯顺序亮就行了

#include

#define uchar unsigned char

#define uint unsigned int

sbit RED_A=P0^0;   //东西向灯

sbit YELLOW_A=P0^1;

sbit GREEN_A=P0^2;

sbit RED_B=P0^3;   //南北向灯

sbit YELLOW_B=P0^4;

sbit GREEN_B=P0^5;

uchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量

//延时

void DelayMS(uint x)

{

       uchari;

       while(x--)for(i=0;i<120;i++);

}

//交通灯切换

void Traffic_Light()

{

       switch(Operation_Type)

       {

              case1:     //东西向绿灯与南北向红灯亮

                            RED_A=1;YELLOW_A=1;GREEN_A=0;

                            RED_B=0;YELLOW_B=1;GREEN_B=1;

                            DelayMS(2000);

                            Operation_Type=2;

                            break;

              case2:     //东西向黄灯闪烁，绿灯关闭

                            DelayMS(300);

                            YELLOW_A=~YELLOW_A;GREEN_A=1;

                            if(++Flash_Count!=10)return; //闪烁5次

                            Flash_Count=0;

                            Operation_Type=3;

                            break;

              case3:     //东西向红灯，南北向绿灯亮

                            RED_A=0;YELLOW_A=1;GREEN_A=1;

                            RED_B=1;YELLOW_B=1;GREEN_B=0;

                            DelayMS(2000);

                            Operation_Type=4;

                            break;

              case4:     //南北向黄灯闪烁5次

                            DelayMS(300);

                            YELLOW_B=~YELLOW_B;GREEN_B=1;

                            if(++Flash_Count!=10)return;

                            Flash_Count=0;

                            Operation_Type=1;

       }

}

//主程序

void main()

{

       while(1)Traffic_Light();

}

参考：

http://hi.baidu.com/do_sermon/item/3275ea54175672c8d2e10c1e