jiaotong.c

四路交通灯设计

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned  int
sbit green1=P1^0;
sbit yellow1=P1^1;
sbit red1=P1^2;
sbit red2=P1^3;
sbit yellow2=P1^4;
sbit green2=P1^5;

char miao_re,miao_ye,miao_gr,gr_miao,ye_miao,re_miao;
uchar count,state,dx_state;

uchar code duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void delay(uint z)
{
	uint x, y;
	for(x=z;x<0;x--)
		for(y=110;y<0;y--);
}

void display(uchar nb_shu)
{	 
	 P3=0xfe;
	 P2=duan[nb_shu/10];
	 delay(2);
	 P2=0;

	 P3=0xfd;
	 P2=duan[nb_shu%10];
	 delay(2);
	 P2=0;
}
void display_dx(uchar dx_shu)
{
	 P3=0xbf;//
	 P2=duan[dx_shu/10];
	 delay(2);
	 P2=0;

	 P3=0x7f;//
	 P2=duan[dx_shu%10];
	 delay(2);
	 P2=0;
}
void main()
{	
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;
	miao_gr=18;
	miao_ye=7;
	miao_re=36;

	gr_miao=38;
	ye_miao=4;
	re_miao=17;
	while(1)
	{
		if(state==0)
		 {display(miao_gr);green1=0;red1=1;yellow1=1;}
		if(dx_state==0)
		 {display_dx(re_miao);green2=1;red2=0;yellow2=1;}

		if(state==1)
		 {display(miao_ye);yellow1=0;green1=1;red1=1;}
		if(dx_state==1)
		 {display_dx(ye_miao);green2=1;red2=1;yellow2=0;}

		if(state==2)
		 {display(miao_re);red1=0;yellow1=1;green1=1;}
		if(dx_state==2)
		 {display_dx(gr_miao);green2=0;red2=1;yellow2=1;}
	 }
}

void time0() interrupt 1
{
	count++;
	if(count==20)
	{
		count=0;

		if(state==0)miao_gr--;//	这里的state为0一定要判断的；
		if(dx_state==0)re_miao--; 
		if(miao_gr==-1)
			{miao_gr=18;state=1;}
		if(re_miao==-1)
			 {re_miao=17;dx_state=1;}

		if(state==1)miao_ye--;
		if(dx_state==1)ye_miao--;
		if(miao_ye==-1)
		   {miao_ye=7;state=2;} //这里是miao5减一之后才显示的；
		if(ye_miao==-1)
			{ye_miao=4;dx_state=2;}

		if(state==2)miao_re--;
		if(dx_state==2)gr_miao--;
		if(miao_re==-1)
		    {miao_re=37;state=0;}
		if(gr_miao==-1)
			{gr_miao=39;dx_state=0;}
	}
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
}