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標題: 單片機數碼管顯示時間的程序問題求分析 [打印本頁]

作者: enchidianzi 時間: 2018-12-28 08:09
標題: 單片機數碼管顯示時間的程序問題求分析
誰能幫我分析下，數碼管單獨顯示時分秒可以得，但按鍵按下切換到年月日時就只能顯示1個1了，哪位老師幫忙指導下
#include <reg52.h>
#include <intrins.h>
#define DATA  P0
typedef unsigned char u8;
typedef unsigned int u16;
sbit seg_sel = P1^4;
sbit bit_sel = P1^5;
sbit key = P3^2;
u8 count ；
u8 shi,fen,miao;
u8 code seg_tab[]={
                        0xc0,0xf9,0xa4,0xb0,
                        0x99,0x92,0x82,0xf8,
                        0x80,0x90,0x88,0x83,
                        0xc6,0xa1,0x86,0x8e,0xbf
                     };
u8 code bit_tab[]={
                        0x10,0x20,0x40,0x80,
                        0x01,0x02,0x04,0x08
                     };
void delay(u16 num)
{
      u16 x,y;
      for(x=num;x>0;x--)
      for(y=110;y>0;y--);
}
void led_display(u8 which_bit,u8 which_num)
{


      bit_sel = 1;
      DATA = bit_tab[which_bit];
      bit_sel = 0;

      seg_sel = 1;
      DATA = seg_tab[which_num];
      seg_sel = 0;
      delay(2);
}
void display_shi(u8 which_bit,u8 num)
{
u8 x,y;
x = num/10;
y = num%10;
if(which_bit == 1)
{
         led_display(0,y);
      delay(1);
      led_display(1,x);
      delay(2);
      led_display(2,seg_tab[17]) ;
}
if(which_bit == 2)
{
         led_display(3,y);
         delay(1);
      led_display(4,x);
      delay(2);
      led_display(5,seg_tab[17]);
}
if(which_bit == 3)
{
            led_display(6,y);
delay(1);
         led_display(7,x);
         delay(2);
}
}
void display_nian(u8 which_bit)
{
         if(which_bit == 1)
{
         led_display(0,6);
      delay(1);
      led_display(1,2);
      delay(2);
      led_display(2,seg_tab[17]) ;
}
if(which_bit == 2)
{
         led_display(3,2);
      delay(1);
      led_display(4,1);
  delay(2);
      led_display(5,seg_tab[17]) ;
}
if(which_bit == 3)
{
         led_display(6,8);
      delay(1);
      led_display(7,1);
      delay(2);
}
}

void main ()
{

         TMOD = 0X01;
      TH0 =(65536-50000)/256;
      TL0 = (65536-50000)%256;
      EA = 1;
      ET0 = 1;
      TR0 = 1;
      DATA = 0xff;
      display_shi(1,miao);
            display_shi(2,fen);
            display_shi(3,shi);
      while(1)
      {
            if(key==1)
         {
            display_shi(1,miao);
            display_shi(2,fen);
            display_shi(3,shi);
            }
      if(key==0)
      {
               delay(10);
               if(key==0)
               {
               display_nian(1);
            display_nian(2);
            display_nian(3);
               } while(!key);
      }
}
}
void LED_0() interrupt 1
{
         TH0 =(65536-50000)/256;
      TL0 = (65536-50000)%256;
      count++;
      if(count==20)
      {
         count=0;
         miao++；
         if(miao==60)
         {
                  miao=0;
               fen++;
               if(fen==60)
               {
                        fen=0;
                     shi++;
                     if(shi==23)
                     {
                              shi=0;
                     }
               }
         }
      }


}

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