四位数码管9999秒倒计时程序 -

标题: 四位数码管9999秒倒计时程序 [打印本页]

作者: daxiao 时间: 2015-3-21 16:39
标题: 四位数码管9999秒倒计时程序
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uint numt,num;

uint ge,shi,bai,qian;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delayms(uint xms)
{
  int i,j;
  for(i=xms;i>0;i--)
   for(j=110;j>0;j--);
}
void main()
{
  num=9999;
  TMOD=0x01;
  EA=1;
  ET0=1;
  TH0=(65536-45872)/256;
  TH1=(65536-45872)%256;
  TR0=1;
  while(1)
  {
   ge=num%10;
   shi=num%1000%100/10;
   bai=num%1000/100;
   qian=num/1000;

   dula=1;
   P0=table[qian];
   dula=0;
   P0=0xff;
   wela=1;
   P0=0xfb;
   wela=0;
   delayms(1);

   dula=1;
   P0=table[bai];
   dula=0;
   P0=0xff;
   wela=1;
   P0=0xf7;
   wela=0;
   delayms(1);

   dula=1;
   P0=table[shi];
   dula=0;
   P0=0xff;
   wela=1;
   P0=0xef;
   wela=0;
   delayms(1);

   dula=1;
   P0=table[ge];
   dula=0;
   P0=0xff;
   wela=1;
   P0=0xdf;
   wela=0;
   delayms(1);


  }

}
void T0time() interrupt 1
{
  TH0=(65536-45872)/256;
  TH1=(65536-45872)%256;
  numt++;
  if(numt==20)
{
   numt=0;
   num- -;
   if(num==0)
      num=9999;


}
}

作者: 南天白云 时间: 2015-3-24 16:05

请问楼主有线路图吗？还有是不是郭老师的？

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