交通灯设计3.c

交通灯程序

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned  int
uchar count,miao_60,miao_05,miao_08,miao_80;
uchar state;
uchar code duan[]={0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9};
//uchar code duan[]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09};
uchar code wei[]={0,1};
void delay(uint z)
{
	uint x, y;
	for(x=z;x<0;x--)
		for(y=110;y<0;y--);
}

void display (uchar shu)
{	
     P0=0x01;
	 P2=duan[shu/10];
	 delay(10);
     P0=0x00;
   	 P2=0;

	 P0=0x02;
	 P2=duan[shu%10];
	 delay(10);
     P0=0x00;
	 P2=0;

}

void main()
{	
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;

	state=0;
	miao_60=10;
	miao_05=6;
	miao_08=8;
	miao_80=16;

	while(1)
	{  
     //P2=duan[2];
     //display(2);

		if(state==0)
		 {display(miao_60);P1=0XF3;} //南北红灯亮 ，东西绿灯亮。显示60秒

		if(state==1)
		 {display(miao_05);P1=0XED;}//南北黄灯亮 ，东西黄灯亮。显示05秒

		if(state==2)
		 {display(miao_80);P1=0XDE;}//南北绿灯亮 ，东西红灯亮。显示80秒
	   //{	display(miao_08);P1=0XF6;}//紧急车通过，全亮红灯。显示08秒/

}
}

void time0() interrupt 1
{
    TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;	
    count++;
	if(count==20)
	{
		count=0;

		if(state==0)
		{
		miao_60--;	 //	这里的state为0一定要判断的；
		if(miao_60==0)
			{
			miao_60=60;state=1;
		}
		}

		if(state==1)
		{
		miao_05--;
		if(miao_05==0)
		   {miao_05=5;state=2;} //这里是miao5减一之后才显示的；
		}
		if(state==2)
		{
		miao_80--;
		if(miao_80==0)
		    {miao_80=16;state=0;}
		} 
		
	}
	
}