以下程式實現是0-59的顯示，段碼接是的P0，位選接P2

#include "reg51.h"

#define uchar unsigned char

uchar display_code[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

uchar display_data[8]={0,0,0,0,0,0,0,0};

void delay(void)

{

uchar i;

for(i=250;i>0;i--);

}

void display()

{

uchar i,k;

k=0x80;

for(i=0;i<8;i++)

{

P2=0;

P0=display_code[display_data[i]];

P0=~P0;

P2=k;

k=k>>1;

delay();

}

P2=0;

}

void calc()

{

display_data[7]++;

if(display_data[7]>9)

{

display_data[7]=0;

display_data[6]++;

if(display_data[6]>5)

{

display_data[6]=0;

}

}

}

void main(void)

{

uchar i;

while(1)

{

for(i=0;i<250;i++)

{

display();

}

calc();

}

}