2.txt

来自「实现两个路后的交通灯C语言程序。每两个数码管实现倒计时。用LED做红绿灯」· 文本 代码 · 共 95 行

#include <reg51.h> 
#define uint unsigned int;
#define uchar unsigned char;
uint i;
uchar two10, two1,one10,one1,j; 
uchar count1=15,count2=12,counter=30,time=0; //定义倒计时的初始值  
uchar code tab1[]={0x03,0x9f,0x27,0x0d,0x9b,0x49,0x41,0x1f,0x01,0x09}; 

void delay(i) //数码管动态显示的延时子程序 
{  
while((i--)!=0) 
{ 
for(j=0;j<124;j++);  
}
}
void display(two10, two1,one10,one1) //显示子程序 
{ 
P2=0x1f; 
P1=tab1[two1]; 
delay(1); 
P2=0x3f; 
P1=tab1[two10]; 
delay(1); 
P2=0x9f; 
P1=tab1[one1]; 
delay(1); 
P2=0xbf; 
P1=tab1[one10]; 
delay(1); 
} 

void main() 
{ 
TMOD=0x01; //T0工作模式是方式	1;
TH0=0xFE; //定义初始值为0.5ms 
TL0=0x33; 
TR0=1; //开启T0计时 
EA=1; 
ET0=1;
P0=0xff;
P2=0xff;
P3=0xff; 
while(1) 
{ 
display(count1/10,count1%10,count2/10,count2%10); 
} 
} 



void timer0() interrupt 1 using 0 //T0中断 
{  
time++; 
if(time==2000) //2000*o.5ms=1s
{ 
time=0;
if(counter>18)
{
P3=0xbe;
}
counter--;
count2--; 				   //B路口的时间转换
if(count2==0&&counter==18) 
{ 
count2=3;
P3=0xbd;
}
if(count2==0&&counter==15) 
{ 
count2=15;
P3=0xeb;
}
 if(count2==0&&counter==0) 
{ 
count2=12;
P3=0xdb;
}
count1--;				 //A路口的时间转换
if(count1==0&&counter==15) 
{ 
count1=12;
}
if(count1==0&&counter==3) 
{ 
count1=3;
}
if(count1==0&&counter==0) 
{ 
count1=15;
counter=30;
}  
}
TH0=0xFE; 
TL0=0x33;
}