单片机——独立按键

该程序实现的功能是按一下按键蜂鸣器发出响声并且数码管上显示的数字加一，当加到100之后重新从0开始计数

#include <reg52.h>
#include "./delay/delay.h"

#define SEGPORT P0

unsigned char bitdata[2] = {0xfe,0xfd};
unsigned char segdata[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char disdata[2] = {0x3f,0x3f};

sbit key1 = P1^0;
sbit seg_sel = P2^1;
sbit bit_sel = P2^0;

sbit beep = P2^7;

void display()
{
   static unsigned char i = 0;
 
   SEGPORT = 0x0;
   seg_sel = 1;
   seg_sel = 0;
 
   SEGPORT = 0xff;
   bit_sel = 1;
   bit_sel = 0;
 
   SEGPORT = disdata[i];
   seg_sel = 1;
   seg_sel = 0;
 
   SEGPORT = bitdata[i];
   bit_sel = 1;