51单片机电子时钟的设计及程序,为什么不能显示结果?

ID:213785 · 发表于 2017-6-22 17:14

#include "reg51.h"
#define char unsigned char
char code dis_7[12]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0xb2,0xf8,0x80,0x90,0xff,0xbf};
char code scan_con[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
char data dis[8]={0x00,0x00,0x0b,0x00,0x00,0x0b,0x00,0x00};
char data timedata[3]={0x00,0x00,0x00};
char data ms50=0x00,con=0x00,con1=0x00,con2=0x00;

sbit key0=P1^0;
sbit key1=P1^1;
sbit key2=P1^2;

void delay1ms(int t)
{
int i,j;
for(i=0;i<t;i++)
   for(j=0;j<120;j++)
      ;
}

void keyscan()
{
EA=0;
if(key0==0)
{
   delay1ms(10);
   while(key0==0)
   con++;
   TR0=0;
   ET0=0;
   if(con>=3)
   {
      con=0;
      TR0=1;
      ET0=1;
   }
}
if(con!=0)
{
   if(key1==0)
   {
      delay1ms(10);
      while(key1==0)
      timedata[con]++;
      if(con==2)
               con1=24;
      else
               con1=60;
      if(timedata[con]>=con1)
      {
         timedata[con]=0;
      }
   }
}
if(con!=0)
{
if(key2==0)
   {
      delay1ms(10);
         while(key2==0)
         timedata[con]--;
         if(con==2)
            con2=23;
         else
            con2=59;
         if(timedata[con]<=0)
               {
                  timedata[con]=con2;
               }
      }
}
EA=1;
}

void scan()
{
char k;
dis[0]=timedata[0]%10;
dis[1]=timedata[0]/10;
dis[3]=timedata[1]%10;
dis[4]=timedata[1]/10;
dis[6]=timedata[2]%10;
dis[7]=timedata[2]/10;
for(k=0;k<8;k++)
{
   P0=dis_7[dis[k]];
   P2=scan_con[k];
   delay1ms(1);
   P2=0xff;
   }
}

main()
{
TH0=0x3c;TL0=0xb0;
TMOD=0x01;ET0=1;
TR0=1;EA=1;
while(1)
{
   scan();
   keyscan();
}
}

void time_intt0(void) interrupt 0
{
ET0=0;TR0=0;
TH0=0x3c;TL0=0xb0;
TR0=1;
ms50++;
if(ms50==20)
{
      ms50=0x00;
      timedata[0]++;
      if(timedata[0]==60)
         {
            timedata[0]=0;
            timedata[1]++;
            if(timedata[1]==60)
               {
                  timedata[1]=0;
                  timedata[2]++;
                  if(timedata[2]==24)
                  {
                        timedata[2]=0;
                     }
               }
         }
   }
   ET0=1;
}

为什么不能显示结果

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