使用stm89c52和LCD1608写一个时钟代码要求可以显示年、月、日、时、分、秒并可以设定闹钟

好的，以下是一个简单的使用stm89c52和LCD1608显示时钟并设置闹钟的代码示例：

#include <reg52.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define LCD_DB P0

sbit LCD_RS = P1^0;
sbit LCD_RW = P1^1;
sbit LCD_E = P1^2;

unsigned char year, month, day, hour, minute, second;
unsigned char alarm_hour, alarm_minute;
unsigned char alarm_enabled = 0;

void delay_ms(unsigned int ms) {
    unsigned int i, j;
    for(i=0; i<ms; i++) {
        for(j=0; j<1000; j++);
    }
}

void lcd_command(unsigned char cmd) {
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_DB = cmd;
    LCD_E = 1;
    delay_ms(1);
    LCD_E = 0;
    delay_ms(1);
}

void lcd_data(unsigned char dat) {
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DB = dat;
    LCD_E = 1;
    delay_ms(1);
    LCD_E = 0;
    delay_ms(1);
}

void lcd_init() {
    lcd_command(0x38);
    lcd_command(0x0c);
    lcd_command(0x06);
    lcd_command(0x01);
}

void display_time() {
    lcd_command(0x80);
    printf("%02d-%02d-%02d", year, month, day);
    lcd_command(0xc0);
    printf("%02d:%02d:%02d", hour, minute, second);
}

void display_alarm() {
    lcd_command(0x80);
    printf("Alarm: %02d:%02d   ", alarm_hour, alarm_minute);
}

void timer0_interrupt() interrupt 1 {
    static unsigned int count;
    TH0 = 0x4c;
    TL0 = 0x00;
    count++;
    if(count >= 1000) {
        count = 0;
        second++;
        if(second >= 60) {
            second = 0;
            minute++;
            if(minute >= 60) {
                minute = 0;
                hour++;
                if(hour >= 24) {
                    hour = 0;
                    day++;
                    if(day >= 31) {
                        day = 1;
                        month++;
                        if(month >= 12) {
                            month = 1;
                            year++;
                        }
                    }
                }
            }
        }
        if(alarm_enabled && hour == alarm_hour && minute == alarm_minute) {
            // trigger alarm
        }
        display_time();
    }
}

void main() {
    TMOD = 0x01;
    TH0 = 0x4c;
    TL0 = 0x00;
    ET0 = 1;
    EA = 1;
    lcd_init();
    year = 21;
    month = 6;
    day = 29;
    hour = 12;
    minute = 0;
    second = 0;
    display_time();
    while(1) {
        // handle button input to set alarm
        display_alarm();
    }
}

这个代码示例中，使用了定时器0来实现每秒更新时间的功能。同时，还可以通过处理按键输入来设置闹钟时间，并在闹钟时间到达时触发闹钟。请注意，这个示例代码只是一个简单的例子，实际应用中可能需要更多的功能和处理逻辑。