單片機NT0中斷計數程序

ID:500398 · 發表于 2019-5-31 10:42

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int

uchar code DSY_CODE[]=
{
      0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x7f,0x6f,0x00
};
uchar Display_Buffer[3]={0,0,0};
uint Count = 0;
sbit Clear_Key = P3^6;

void Show_Count_ON_DSY()
{
      Display_Buffer[2] = Count / 100;
      Display_Buffer[1] = Count % 100 /10;
      Display_Buffer[0] = Count % 10;
      if(Display_Buffer[2]==0)
      {
               Display_Buffer[2] = 0x0a;
            if(Display_Buffer[1]==0)
            {
                     Display_Buffer[1]=0x0a;
            }
      }
      P0 = DSY_CODE[Display_Buffer[0]];
      P1 = DSY_CODE[Display_Buffer[1]];
      P2 = DSY_CODE[Display_Buffer[2]];
}

void main()
{
      P0 = 0xff;
      P1 = 0xff;
      P2 = 0xff;
      IE = 0x81;
      IT0 = 1;
      while(1)
      {
               if(Clear_Key == 0)
                     Count = 0;
            Show_Count_NO_DSY();
      }
}

void EX_INT0() interrupt 0
{
      Count ++;
}

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單片機NT0中斷計數程序