按键控制数码管加减程序

#include

#define dataport P1

#define uchar unsigned char

#define uint unsigned int

sbit latch1=P2^2; //段锁存

sbit latch2=P2^3; //位锁存

sbit key1=P3^2;

sbit key2=P3^3;

unsigned int duanma[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x7,

0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79}; unsigned int weima[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; unsigned char display[8];

void suocun(uchar firstbit,uchar num);

void delay(uchar z) //延时程序

{

uchar i,j,k;

for(i=0;i<50;i++)

for(j=0;j<50;j++)

for(k=0;k

}

void main(void)

{

uchar num=0;

key1=1;

key2=1;

while(1)

{

if(!key1)

{

delay(5);

if(!key1)

{

num++;

if(num==10)

num=0;

}

}

if(!key2)

{

delay(5);

if(!key2)

{

num--;

if(num==0)

num=9;

}

}

display[0]=duanma[num%10];

suocun(2,1);

}

}

void suocun(uchar firstbit,uchar num)

{

uchar i ;

for(i=0;i

{

dataport=0;

latch1=1;

latch1=0;

dataport=weima[firstbit+i];

latch2=1;

latch2=0;

dataport=display[i];

latch1=1;

latch1=0;

}

}

最近在学习51单片机，因此偶尔也会写写小程序，因此和大家分享一下，希望大家都能学好单片机。