51单片机用lm016l显示闹钟的的C语言程序

好的，下面是一个简单的51单片机用LM016L显示闹钟的C语言程序，仅供参考：

#include <reg51.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define LCD_RS P2_0
#define LCD_RW P2_1
#define LCD_EN P2_2
#define LCD_DATA P1

void delay(unsigned int ms)
{
    unsigned int i, j;
    for(i = 0; i < ms; i++)
        for(j = 0; j < 110; j++);
}

void lcd_init()
{
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_EN = 0;
    delay(15);
    LCD_DATA = 0x38;
    LCD_EN = 1;
    delay(5);
    LCD_EN = 0;
    delay(5);
    LCD_DATA = 0x38;
    LCD_EN = 1;
    delay(5);
    LCD_EN = 0;
    delay(5);
    LCD_DATA = 0x0C;
    LCD_EN = 1;
    delay(5);
    LCD_EN = 0;
    delay(5);
    LCD_DATA = 0x01;
    LCD_EN = 1;
    delay(5);
    LCD_EN = 0;
    delay(5);
}

void lcd_write_cmd(unsigned char cmd)
{
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_DATA = cmd;
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
    delay(1);
}

void lcd_write_data(unsigned char dat)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DATA = dat;
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
    delay(1);
}

void lcd_set_pos(unsigned char row, unsigned char col)
{
    unsigned char pos;
    if(row == 0)
        pos = 0x80 + col;
    else
        pos = 0xC0 + col;
    lcd_write_cmd(pos);
}

void lcd_write_string(unsigned char row, unsigned char col, unsigned char *str)
{
    lcd_set_pos(row, col);
    while(*str)
    {
        lcd_write_data(*str++);
    }
}

void main()
{
    unsigned char alarm_hour, alarm_minute;
    unsigned char hour, minute;
    char str[9];
    lcd_init();
    alarm_hour = 8; // 设置闹钟小时
    alarm_minute = 30; // 设置闹钟分钟
    while(1)
    {
        hour = get_hour(); // 获取当前小时
        minute = get_minute(); // 获取当前分钟
        sprintf(str, "%02d:%02d", hour, minute); // 格式化时间字符串
        lcd_write_string(0, 0, str); // 在第一行显示时间
        if(hour == alarm_hour && minute == alarm_minute) // 如果到了闹钟时间
        {
            lcd_write_string(1, 0, "Alarm!"); // 在第二行显示闹钟提示信息
            delay(500); // 延时500毫秒
            lcd_write_string(1, 0, "      "); // 清除闹钟提示信息
            delay(500); // 延时500毫秒
        }
        delay(1000); // 延时1秒
    }
}

这个程序与时钟程序相似，不同之处在于多了一个闹钟的判断和提示。需要根据实际需求实现获取当前时间的函数`get_hour()`和`get_minute()`，同时需要设置闹钟的小时和分钟。提示信息可以根据实际情况进行修改。