数码管显示秒表

ID:471825 · 发表于 2019-11-13 19:18

#include<reg51.h>
unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
sbit LED0=P1^0;
sbit LED1=P1^1;
unsigned char n,sec;
void delay(unsigned char i)
{
   unsigned char j;
  while(i--);
  {
   for(j=0;j<125;j++)
{;}
  }
}
void display()
{

   P2=0x01;
  P0=tab[sec/10];
  delay(3);
  P2=0x02;
  P0=tab[sec%10];
  delay(3);
}
void main()
{
   sec=00;
   TMOD=0x01; //选择T0，于工作方式1
  TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  TR0=1;
  EA=1;
  ET0=1;
  n=0;
  LED0=0;
  LED1=1;
  while(1)
  {
   display();
  }
}
void timer() interrupt 1
{
n++;
if(n==20)
{
      n=0;
   sec++;
   if(sec==60)
   {
      sec=0;
   }
}
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
}

帐号		自动登录	找回密码
密码			立即注册