【proteus仿真】C51单片机实现学校打铃器

运用89C51单片机实现对数码管和喇叭的控制，运用按键设置单片机的实时时间和响铃时间。
仿真视频：

https://www.bilibili.com/video/BV1nY4y1B7wu/

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit sounder=P3^6;
bit sound_time=0;
uchar sec,min,hour;
uchar sec_xg,min_xg,hour_xg;
uchar sec_change,min_change,hour_change;
uint code digi[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};
uchar code guan[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar bell_hour[]={8,8,8,9,10,10,11,11,14,14,14,15,16,16,17,17};
uchar bell_min[]={0,45,55,40,10,55,5,50,0,40,55,40,10,55,5,50};
uchar temp=0;
uint time_con=0;
uchar w,w1=0;
uchar flag1,flag2,flag3,flag=0,flag4=1;
uchar findflag=0,xgflag=0;
uchar key;
uchar change;
uchar t,t1;
uchar a=0,b=0;
void delay(uint t1)
{ uchar i,j;
   for(i=0;i<t1;i++)
	for(j=0;j<30;j++);
}
void play()
{
 if(w>=1)
 {
 w1=0;
 flag=1;
 }
 else
 { if(flag==1&&flag4==1)
     w=0;
	 if(flag==1&&flag4==1&&a==1)
	 { w1=1;
	 }
 }
 P0=guan[0];
 P2=digi[sec%10];
 if(w1==1)delay(7);
 else delay(40);
 P0=guan[1];
 P2=digi[sec/10];
 if(w==1)delay(7);
 else delay(40);
 P0=guan[2];
 P2=digi[10];
 delay(40);
 P0=guan[3];
 P2=digi[min%10];
 if(w==3) delay(7);
 else delay(40);
 P0=guan[4]; 
 P2=digi[min/10]; 
 if(w==4)delay(7);
 else delay(40);
 P0=guan[5];
 P2=digi[10];
 delay(40);
 P0=guan[6];
 P2=digi[hour%10];
 if(w==6)delay(7);
 else delay(40);
 P0=guan[7];
 P2=digi[hour/10];
 if(w==7) delay(7);
 else delay(40);
}
void belltime()interrupt 3
{
 TH1=(65536-50000)/256;
 TL1=(65536-50000)%256;
 sounder=!sounder;
 time_con++;
 if(time_con==9760)
 {
  time_con=0;
  sound_time=0;
 }
}
void time()interrupt 1
{
 uchar i;
 flag1=0;
 flag2=0;
 flag3=0;
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;
 if(temp>19)
 {
  temp=0;
  sec++;
  if(sec>59)
  {
   sec=0;
   min++;
   if(min>59)
    { min=0;
	  hour++;
	  if(hour>23)
	   hour=0;
	  }
	}
  }
  else temp++;
  if(sec==0)
  flag1=1;
  if(t==0)
  {
   for(i=t;i<23;i++)
   {
    if(min==bell_min[i])
	flag2=1;
	if(hour==bell_hour[i])
	flag3=1;
	if(flag2==1&&flag3==1)
	{ break;}
   }
  }
  if(t>0)
  { if(bell_min[t]==0&&bell_hour[t]==0)
     { b=1;}
	 if(min==bell_min[t])
	 flag2=1;
	 if(hour==bell_hour[t])
	 flag3=1;
  }
  if(flag1==1&&flag2==1&&flag3==1&&b==0)
  { t++;
    sound_time=1;
	flag1=0;
	flag2=0;
	flag3=0;
  }
  if(b==1)
  t=0;
}
void xiugai()
{ 
 TR0=0;
 w1=1;
 sec_xg=sec;
 min_xg=min;
 hour_xg=hour;
}
void find()
{ TR0=0;
  sec_change=sec;
  min_change=min;
  hour_change=hour;
  hour=bell_hour[change];
  min=bell_min[change];
  sec=0;
}
void jia()
{
 if(xgflag>0)
 { if(w==0)
   { sec++;
   if(sec>=60)
   sec=0;
   }
   if(w==1)
   { sec=sec+10;
   if(sec>=60)
   sec=0;
   }
   if(w==3)
   { min++;
   if(min>=60)
   min=0;
   }
   if(w==4)
   {min=min+10;
   if(min>=60)
   min=0;
   }
   if(w==6)
   { hour++;
   if(hour>=24)
   hour=0;
   }
   if(w==7)
   { hour=hour+10;
     if(hour>=24)
	 hour=0;
   }
  }
}
void jian()
{ if(xgflag>0)
  { if(w==0)
    { sec--;
	  if(sec<0)
	  sec=0;
	}
	if(w==1)
	{ sec=sec-10;
	if(sec<0)
	  sec=0;
	}
	if(w==3)
	{ min--;
	if(min<0)
	min=0;
	}
	if(w==4)
	{ min=min-10;
	  if(min<0)
	  min=0;
	}
	if(w==6)
	{ hour--;
	  if(hour<0)
	    hour=0;
	}
	if(w==7)
	{ hour=hour-10;
	  if(hour<0)
	   hour=0;
	}
  }
}
void save()
{ 
 TR0=0;
 if(xgflag>0)
{w1=0;
 w=0;
 flag4=0;
}
if(t1>0)
{ bell_hour[change]=hour;
  bell_min[change]=min;
  sec=sec_change;
  min=min_change;
  hour=hour_change;
}
}
void cancel()
{ TR0=1;
  if(xgflag>0)
  { if((sec_xg!=sec)||(min_xg!=min)||(hour_xg!=hour))
    { sec=sec_xg;
	  min=min_xg;
	  hour=hour_xg;
	}
	w1=0;
	w=0;
	flag4=0;
	}
	if(t1>0)
	{ sec=sec_change;
	  min=min_change;
	  hour=hour_change;
	}
}
void main()
{ uchar i;
  P0=0x00;
  P2=0x3f;
  TMOD=0x01;
  TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  TH1=(65536-50000)/256;
  TL1=(65536-50000)%256;
  EA=1;
  ET0=1;
  TR0=1;
  ET1=1;
  sec=55;
  min=59;
  hour=7;
  flag1=0;
  flag2=0;
  flag3=0;
  t=0;
  key=P1;
  w=0;
  change=1;
  t1=0;
  while(1)
  { play();
    if(sound_time)
     TR1=1;
	 else TR1=0;
	 P1=0xff;
	 key=P1;
	 if(key!=0xff)
	  for(i=0;i<30;i++)
	   play();
	   switch(key)
	   { 
	     case 0xfe:xgflag++;findflag=0;w=0;xiugai();break;
		 case 0xfd:jia();break;
		 case 0xfb:jian();break;
		 case 0xf7:if(xgflag>0)
		           { w++;
				     if(w>7)
					 w=0;
					}
					if(findflag>0)
					{ change++;
					  hour=bell_hour[change];
					  min=bell_min[change];
					  sec=0;
					  if(change>23)
					  change=0;
					}break;
		  case 0xef: if(xgflag>0)
		             { w--;
					 if(w<0) w=7;}
					 if(findflag>0)
					 { change--;
					   hour=bell_hour[change];
					   min=bell_min[change];
					   sec=0;
					   if(change<0)
					   change=23;}break;
		  case 0xdf: cancel();xgflag=0;findflag=0;t1=0;break;
		  case 0xbf: save();xgflag=0;findflag=0;t1=0;break;
		  case 0x7f: findflag++;w=0;t1=1;find();break;
		  }
		  }
}