51单片机电子记分牌编程代码：实现加减分、复位功能

#include <reg51.h>

#define uchar unsigned char #define uint unsigned int

sbit beep = P1^0; sbit addBtn = P2^0; sbit subBtn = P2^1; sbit resetBtn = P2^2;

uchar code SEG_TABLE[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

uchar score = 50;

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

void displayScore(uchar s) { uchar tensDigit = s / 10; uchar unitsDigit = s % 10;

P0 = SEG_TABLE[tensDigit];
P2 = 0xfe;
delay(5);

P0 = SEG_TABLE[unitsDigit];
P2 = 0xfd;
delay(5);

}

void init() { TMOD = 0x01; // 定时器0工作在模式1 TH0 = 0x3c; // 定时器初值 TL0 = 0xb0; EA = 1; // 允许中断 ET0 = 1; // 允许定时器0中断 TR0 = 1; // 启动定时器0 }

void main() { init();

while(1) {
    if(addBtn == 0) {
        delay(10);
        if(addBtn == 0) {
            while(addBtn == 0);
            if(score < 99) {
                score++;
                beep = 0;
                displayScore(score);
            }
        }
    }
  
    if(subBtn == 0) {
        delay(10);
        if(subBtn == 0) {
            while(subBtn == 0);
            if(score > 0) {
                score--;
                beep = 0;
                displayScore(score);
            }
        }
    }
  
    if(resetBtn == 0) {
        delay(10);
        if(resetBtn == 0) {
            while(resetBtn == 0);
            score = 50;
            beep = 0;
            displayScore(score);
        }
    }
}

}

void timer0() interrupt 1 { TH0 = 0x3c; TL0 = 0xb0; beep = ~beep; }

// 使用定时器0控制蜂鸣器，按钮K1、K2分别控制加减分，K3用于复位分数。数码管显示当前分数。