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標(biāo)題: 基于AT89C51單片機(jī)的0~59秒計(jì)時(shí)器C語(yǔ)言程序 [打印本頁(yè)]

作者: 祺子and祺寶 時(shí)間: 2017-11-5 18:33
標(biāo)題: 基于AT89C51單片機(jī)的0~59秒計(jì)時(shí)器C語(yǔ)言程序

#include<reg51.h>
#include<math.h>
#define uchar unsigned char
#define uint unsigned int
uchar code dispcode[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar sec1,sec2,sec3,sec4,sec,arcsec,num;
void delay();//延時(shí)函數(shù)
void main()
{
  sec=0;
  TMOD=0x01;
  TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  ET0=1;
  EA=1;
  TR0=1;
  while(1)
  {
arcsec=abs(99-sec);
//       sec1=sec/10;
//       sec2=sec%10;
//       sec3=arcsec/10;
//       sec4=arcsec%10;
P2=0x01;
P0=dispcode[sec/10];
delay();
P2=0x02;
P0=dispcode[sec%10];
delay();
P2=0x10;
P0=dispcode[arcsec/10];
delay();
P2=0x20;
P0=dispcode[arcsec%10];
delay();
  }
}
void int0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
num++;
if(num==20)
{
   num=0;
      sec++;
      if(sec>99)sec=0;
}
}
void delay()
{
  unsigned int i;
  for(i=0;i<125;i++);
}

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