单片机简易时钟代码

ID:918467 · 发表于 2021-7-13 15:14

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

uchar code table1[]={0x3f,0x06,0x5b,0x4f,
                  0x66,0x6d,0x7d,0x07,
                  0x7f,0x6f,0x77,0x7c,
                  0x39,0x5e,0x79,0x71};
uchar code table2[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

int h = 10;
int m = 30;
int i = 0;

void delay(uint xms)
{
      uint i,j;
      for(i=xms;i>0;i--)
            for(j=110;j>0;j--) ;
}

void blink()
{
      i++;
      P2 = table2[3];
      if(i%2==0)
            P0 = 0x09;
      else
            P0 = 0x00;
      delay(20);
      i %= 10;
}

void display()
{
      int i,j;
      blink();

      i = h/10;
      j = h%10;
      P2 = table2[0];
      P0 = table1[ i];
      delay(5);
      P2 = table2[1];
      P0 = table1[j];
      delay(5);

      i = m/10;
      j = m%10;
      P2 = table2[5];
      P0 = table1[ i];
      delay(5);
      P2 = table2[6];
      P0 = table1[j];
      delay(5);
}

void int0()  interrupt 0
{
      m++;
      if(m>59)
      {
            m = 0;
            h++;
            if(h>23)
                     h = 0;
      }
}

void int1()  interrupt 2
{
      m--;
      if(m<0)
      {
            m = 59;
            h--;
            if(h<0)
            {
                     h = 23;
            }
      }
}

void init()
{
      EA = 1;
      EX0 = 1;
      EX1 = 1;
      IT0 = 1;
      IT1 = 1;
}

void main()
{
      init();
      while(1)
      {
            display();
      }
}

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