dzz.c

单片机设计的电子钟C程序

#include "reg51.h"
#include "stdio.h"
#define uint unsigned int
#define uchar unsigned char
uchar data second=0,minute=0,hour=0;
uchar  data disbuf[6]={0};
//uchar  data second_0,second_1,minute_0,minute_1,hour_0,hour_1;
uchar bdata FLAG=0;
sbit H_M=FLAG^1;
sbit P1_0=P1^0;
sbit P3_2=P3^2;
uchar code table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

uchar data count=0;
//定时器０的中断服务程序
void  timer0(void) interrupt 1 using 1
{TH0=-50000/256;
 TL0=-50000%256;
 count++;
 if(count==20)
     {count=0;
      second++;
           if(second==60)
               {second=0;
                minute++;
                    if(minute==60)
                       {minute=0;
                        hour++;
                          if(hour==24)
                              {hour=0;}
                        }
                }
     }
  return;
 }

void dlms(void)
{uchar i;
 for(i=2000;i>0;i--){}
}

//外部中断０的中断服务程序
void int0(void) interrupt 0 using 2
{while(!P3_2)
 { dlms();
 }
 dlms();
 if(P3_2)
     H_M=!H_M;
 }

//显示程序
void disp(void)
{uchar i,j;
 uchar bdata sel;
 disbuf[0]=second%10;
 disbuf[1]=second/10;
 disbuf[2]=minute%10;
 disbuf[3]=minute/10;
 disbuf[4]=hour%10;
 disbuf[5]=hour/10;
 P2=0XFF;
 sel=0x01;
 for(i=0;i<6;i++)
  {j=disbuf[i];
     P2=(sel^0xff);
    P0=table[j];
    dlms();
    P2=0XFF;
    sel=sel<<1;
  }
}
void increa(void)
{if(H_M)
   {hour++;
    if(hour==24)
        {hour=0;
         disbuf[4]=0;
         disbuf[5]=0;
         }
    }
  else
    {minute++;
      if(minute==60)
        {minute=0;
         disbuf[2]=0;
         disbuf[3]=0;
         }
     }
 }
 main( )
 {TCON=0x01;
  TMOD=0x01;
  TH0=-50000/256;
  TL0=-50000%256;
  EA=1;
  ET0=1;
  EX0=1;
  TR0=1;

while(1)
   {disp();
     if(!P1_0)
       {while(!P1_0)
        dlms();
         if(P1_0)
         increa();
       }
   }

}