电子万年历代码c语言keil

下面是一个简单的电子万年历的代码示例，使用C语言和Keil开发环境：

#include <reg51.h>

// 定义数码管显示的端口
sbit dula = P2 ^ 6;
sbit wela = P2 ^ 7;
sbit beep = P1 ^ 5;

// 定义按键的端口
sbit key1 = P3 ^ 1;
sbit key2 = P3 ^ 0;
sbit key3 = P3 ^ 2;

// 定义闹铃时间
unsigned char alarm_hour = 0;
unsigned char alarm_minute = 0;

// 定义当前时间
unsigned char hour = 0;
unsigned char minute = 0;
unsigned char second = 0;

// 定义当前日期
unsigned char year = 0;
unsigned char month = 0;
unsigned char day = 0;
unsigned char week = 0;

// 数码管显示表
unsigned char code table[] = {
    0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,
    0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
};

// 延时函数
void delay(unsigned int i) {
    while (i--);
}

// 数码管显示函数
void display(unsigned char *p) {
    unsigned char i;
    for (i = 0; i < 8; i++) {
        dula = 1;
        P0 = table[p[i]];
        dula = 0;
        delay(100);
    }
    for (i = 0; i < 8; i++) {
        wela = 1;
        P0 = 0xfe << i;
        wela = 0;
        delay(100);
    }
}

// 设置时间函数
void set_time() {
    unsigned char i, j, k;
    i = j = k = 0;
    while (1) {
        if (key1 == 0) {
            delay(10);
            if (key1 == 0) {
                i++;
                if (i == 24) i = 0;
                while (!key1);
            }
        }
        if (key2 == 0) {
            delay(10);
            if (key2 == 0) {
                j++;
                if (j == 60) j = 0;
                while (!key2);
            }
        }
        if (key3 == 0) {
            delay(10);
            if (key3 == 0) {
                k++;
                if (k == 60) k = 0;
                while (!key3);
            }
        }
        hour = i;
        minute = j;
        second = k;
        display(&hour);
        beep = 0;
        delay(500);
        beep = 1;
    }
}

// 主函数
void main() {
    // 初始化定时器
    TMOD = 0x01;
    TH0 = (65536 - 45872) / 256;
    TL0 = (65536 - 45872) % 256;
    ET0 = 1;
    EA = 1;
    TR0 = 1;

    // 显示欢迎语
    unsigned char welcome[] = {0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
    display(welcome);
    delay(1000);

    // 设置时间
    set_time();

    // 正常运行
    while (1) {
        // 显示时间和日期
        unsigned char time[] = {hour / 10, hour % 10, 10, minute / 10, minute % 10, 10, second / 10, second % 10};
        display(time);
        unsigned char date[] = {year / 10, year % 10, 11, month / 10, month % 10, 11, day / 10, day % 10};
        display(date);

        // 检查闹铃时间
        if (hour == alarm_hour && minute == alarm_minute) {
            beep = 0;
            delay(500);
            beep = 1;
        }
    }
}

// 定时器中断函数
void timer0() interrupt 1 {
    TH0 = (65536 - 45872) / 256;
    TL0 = (65536 - 45872) % 256;
    second++;
    if (second == 60) {
        second = 0;
        minute++;
        if (minute == 60) {
            minute = 0;
            hour++;
            if (hour == 24) {
                hour = 0;
                week++;
                if (week == 7) {
                    week = 0;
                }
            }
        }
    }
}

注意：此代码仅供参考，实际应用中还需要添加更多的功能和错误处理。