单片机秒表计时器代码

ID:959863 · 发表于 2021-8-10 18:41

#include<reg52.h>
#defineuint unsigned int
#define  uchar unsigned char
sbitdula=P2^6;
sbitwela=P2^7;
ucharcode table[]={0x3f,0x06,0x5b,0x4f,0x66,
                  0x6d,0x7d,0x07,0x7f,0x6f,
                  0x77,0x7c,0x39,0x5e,0x79,
                  0x71,0x00,0x80};
ucharcode tablewe[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
uintnum,t;
uinttemp,ge=0,shi=0,bai=0;
voiddelay(uint);
voiddisplay(uint);
voidinit();
voidmain()
{
   init();
      while(1)
      {
               if(t==20 )
               {
            t=0;
                        temp++;
               }
         display(temp);
   }
}
voiddelay(uint b)
{
uint a, c;
               for(a=10;a;a--)
                  for(c=b;c;c--);
}
voidextern0() interrupt 1
{
   t++;
               TH0=(65536-50000)/256;
               TL0=(65536-50000)%256;
}
voidinit()
{
               TMOD=0x01;
               TH0=(65536-50000)/256;
               TL0=(65536-50000)%256;
               EA=1;
               ET0=1;
               TR0=1;
               temp=0;
}
voiddisplay(uint n)
{


               bai=n/100;
               shi=n/10%10;
               ge=n%10;

               wela=1;
               P0=tablewe[0];
               wela=0;
               dula=1;
               P0=table[bai];
               dula=0;
               delay(5);

               P0=0xff;

               wela=1;
               P0=tablewe[1];
               wela=0;
               dula=1;
               P0=table[shi];
               dula=0;
               delay(5);

               P0=0xff;

               wela=1;
               P0=tablewe[2];
               wela=0;
               dula=1;
               P0=table[ge];
               dula=0;
               delay(5);
               P0=0xff;
}

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