抢答器程序.txt

51单片机 16路数字抢答器

#include<reg52.h>
#define  uchar  unsigned  char
#define  uint   unsigned  int
#define DB P1
void count_time(uint);
uint t1;
uint t2=0;
uchar j=10;
//void delay (void);
sbit  DB0=P1^2;
sbit  DB1=P1^3;
sbit  DB2=P1^4;
sbit  DB3=P1^5;
sbit  DB4=P1^6;
sbit  DB5=P1^0;
sbit  DB6=P1^1;


sbit  c0=P3^0;
sbit  c1=P3^1;
sbit  c2=P3^2;
sbit  c3=P3^3;
sbit  c4=P3^4;
sbit  c5=P3^5;
sbit  c6=P3^6;
sbit  c7=P3^7;

uchar qd_time[]={80,50,30,10 };//设定抢答时间

uchar display_code0[]={
        0xED,/*0*/		  //两位一体的代码
        0x88,/*1*/
        0xD5,/*2*/
        0xD9,/*3*/
        0xB8,/*4*/
        0x79,/*5*/
        0x7D,/*6*/
        0xC8,/*7*/
        0xFD,/*8*/
        0xF9,/*9*/

};

uchar display_code1[]={
     //   0x7E,/*0*/		  //一位的代码
        0x12,/*1*/
        0xBC,/*2*/
        0xB6,/*3*/
        0xD2,/*4*/
        0xE6,/*5*/
        0xEE,/*6*/
        0x32,/*7*/
        0xFE,/*8*/
        0xF6,/*9*/
};
void timer0(void) interrupt 1 using 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	t2++;
	if(t2>20)
	  {
	  t2=0;
	  t1--;
	  
	  }
    
	  
}
void delay (uint tt)
{
	while(tt)
	tt--;
}
void key (uint t )
{
	uchar i;
	i=t/10;	   //开始显示倒计时间
	
	DB5=DB6=1;
	
    P0=display_code0[i];
    DB5=0;
    delay(500);

    
  
	DB5=DB6=1;
	i=t%10;
    P0=display_code0[i];
    DB6=0;			
    delay(500);
}

void yrqd(void)
{
  
   DB0=0;
  // P3=1;
   delay(10000);
   DB0=1;
   P2=0;
   
   if(!c0)
    { P2=0x12;
	  
	  while(1)
	  key(t1);
	  }
   else if(!c1)
     {   P2=0xBC;
	      
		while(1)
		key(t1);}
		else if(!c2)
	{	P2=0xB6;
	    
		while(1)
		key(t1);
		   }
		     else if(!c3)
			{ P2=0xD2;
			
			   while(1)key(t1);}
			      else if(!c4)
				{  P2=0xE6;
				
				 	while(1)key(t1);}
				        else if(!c5)
					{	P2=0xEE;
					
						  while(1)key(t1);}
						     else if(!c6)
						  {   P2=0x32;
						 
							  while(1)key(t1);}
							      else if(!c7)
						       {   P2=0xFE;
							   
 								   while(1)key(t1);}
   
}


void count_time(uint t1 )
{	  
/*	if(t1<=10) 
	 	{
			DB0=0;
			delay(1);
			DB0=1;	}
  
 //for(j=0;j<t;j++){
  				   
  /*  TMOD=0x61;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TH1=256-5;
	TL1=256-5;
	IP=0X08;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;
	EA=1;	  */

	if((P3&0xff)!=0xff)	  //有人抢答
	  { TR0=0;
	  
	   yrqd();
	   }
	else if(t1==j)
	{	 DB0=0;
		delay(500);
		DB0=1;
		j--;
	}

	else if(t1==0)
	{
	//	DB=1;
		DB0=0;
		delay(10000);
		DB0=1;
		while(1)
		key(0); 
	}
	
/*	if(t1<=10) 
	 	{
			DB0=0;
			delay(500);
			DB0=1;
			
		} */
	 key(t1);       	   
	
		   
/*    i=t/10;	   //开始显示倒计时间
	
	DB5=DB6=1;
	
    P0=display_code0[i];
    DB5=0;
    delay(500);

    
  
	DB5=DB6=1;
	i=t%10;
    P0=display_code0[i];
    DB6=0;			
    delay(500);
	
/*	if(t1==0)			 //这个程序要修改
	 { DB0=0;
	  delay(1000);
	  DB=1;		  
	  }		 */
 /* 	if((P3&0xff)!=0xff)
	  { TR0=0;
	   yrqd();
	   P3=1;
	   }     //有人抢答	*/		  
	
	
	

 // }		
}

void main(void )
{ 
  //	uint i;
//	while(1)
//	{
	DB0=1;
	DB0=0;		//复位响喇叭
	delay(10000);
	DB0=1;
	P2=0;
   if(!DB1)
      t1=80;
	else if(!DB2)
		 t1=50;
		 else if(!DB3)
		      t1=30;
		      else if(!DB4)
		           t1=10;
  	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
//	TH1=256-5;
//	TL1=256-5;
//	IP=0X08;
	EA=1;
	ET0=1;
//	ET1=1;
	TR0=1;
//	TR1=1;
//	for(i=t1;i>0;i--)
	
   while(1)
		{
  count_time( t1 ); 
  		
  }
   
//  }
}