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基于51单片机的16键电子琴音乐盒设计proteus仿真原理图程序

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功能：

0.本项目采用STC89C52作为单片机系统的控制MCU

1.LCD1602液晶实时显示时间和当前工作模式

2.支持电子琴模式和歌曲模式（内置8首歌曲）

3.短触’设置/切换’键可切换工作模式

4.长按’设置/切换‘键可进入时间设置模式

5.采用DC002作为电源接口可直接输入5V给整个系统供电

原理图：

在这里插入图片描述

PCB ：

在这里插入图片描述

主程序： 

//
//51单片机音乐播放器程序
//STC89C52+11.0592MHz+无源蜂鸣器
//共三个按键:上一曲、一下曲、播放\暂停
//注意：按键必须按下约1S才有相应动作,播放完一首歌曲无按键按下时顺序播放

//
#include <REG52.H>
#include <stdio.h>
#include "delay.h"
#include "lcd1602.h"
#include "ds1302.h"

#define MUSIC_AMOUNT 8 //歌曲的数量
sbit SPEAKER = P3^2;     //无源蜂鸣器
sbit KEY_PAUSE = P1^5;
sbit KEY_SET = P2^7;
sbit KEY_PREVIOUS = P1^2;
sbit KEY_NEXT = P1^3;

//
unsigned char beatTime = 0;    //T0RH,T0RL为定时器T0的高低位初值,g_beatTime为对应的节拍时间
char musicNum = 0;              //g_musicNum为歌曲编号,musicNum=0表示刚开机时的状态,g_noteCnt是查找歌曲数据表的地址
unsigned int noteCnt;
signed int g_fre;                      //对应频率数据表的地址
bit playEnFlag = 1;                          //歌曲播放的使能标志位,用于播放\暂停
unsigned char keyValue;
unsigned char dispRow0[] = "  /  /  ";
unsigned char dispRow1[] = "  :  ";
bit dispSongFlag = 1;
bit dispTimeFlag = 1;
bit setTimeFlag = 0;
unsigned char setLocation = 0;

void SetTime();
void DispTime();
void KeyScan();	                           //按键处理
void DelayOfBeat(unsigned char t);	   //延时子函数,控制发音的时间长度
void PlayOneNote(void);		           //演奏一个音符
void PlayMusic(void);	               //播放歌曲
void DispMusic(void);
void Timer0_Init();
void Timer1_Init();
//
//每三个数字,代表一个音符
//第一个数字是音符的数值1234567之一(第几个音),代表哆来咪发...
//第二个数字是0123之一,代表低音\中音\高音\超高音(第几个八度)
//第三个数字是时间长度,以半拍为单位,乐曲数据表的结尾是三个0
//



//《烟花易冷》
unsigned char code song1[]={
    5,2,1, 3,2,1, 2,2,2, 2,2,4, 3,2,1, 1,2,1, 2,2,1, 3,2,4, 
    5,2,1, 3,2,1, 2,2,2, 2,2,2, 5,1,1, 3,2,1, 4,2,1, 3,2,4, 
    3,2,1, 3,2,1, 7,2,1, 3,2,1, 2,2,2, 1,2,1, 7,1,1, 1,2,1, 
    2,2,1, 3,2,1, 6,2,3, 6,1,1, 1,2,1, 3,2,1, 2,2,1, 6,1,1, 
    1,2,1, 7,1,1, 5,1,1, 6,1,6, 5,2,1, 3,2,1, 2,2,2, 2,2,1, 
    2,2,1, 3,2,1, 1,2,1, 2,2,1, 3,2,4, 5,2,1, 3,2,1, 2,2,2, 
    2,2,1, 2,2,1, 5,1,1, 3,2,1, 4,2,1, 3,2,4, 3,2,1, 3,2,1, 
    7,2,3, 3,2,1, 2,2,2, 1,2,1, 7,1,1, 1,2,1, 2,2,1, 3,2,1, 
    6,2,3, 6,1,1, 1,2,1, 3,2,1, 2,2,1, 6,1,1, 1,2,1, 7,1,2, 
    5,1,2, 6,1,6, 0,0,0 };

//《发如雪》
unsigned char code song2[]={
    5,1,1, 2,2,1, 3,2,2, 2,2,1, 3,2,1, 5,2,1, 6,2,1, 5,2,3, 1,2,1, 2,2,1, 
    3,2,1, 6,2,1, 5,2,1, 3,2,1, 5,2,3, 5,2,1, 6,2,1, 1,3,2, 6,2,1, 5,2,1, 
    3,2,1, 5,2,1, 3,2,2, 1,2,1, 2,2,1, 3,2,1, 1,2,1, 6,1,1, 3,2,1, 2,2,1, 
    5,1,1, 2,2,1, 3,2,2, 2,2,1, 3,2,1, 5,2,1, 6,2,1, 5,2,3, 1,2,1, 2,2,1, 
    3,2,1, 6,2,1, 5,2,3, 5,2,1, 6,2,1, 1,3,2, 6,2,1, 
    5,2,1, 3,2,1, 5,2,1, 3,2,2, 1,2,1, 6,1,1, 3,2,1, 2,2,1, 1,2,1, 6,1,1, 
    1,2,1, 2,2,1, 2,2,1, 1,2,4, 0,0,0 };

//《简单爱》
unsigned char code song3[]={
    5,1,1, 1,2,1, 2,2,1, 3,2,1, 2,2,1, 3,2,1, 4,2,1, 5,2,1, 5,2,1, 5,2,1, 
    4,2,1, 3,2,1, 2,2,3, 5,1,1, 1,2,1, 2,2,1, 3,2,1, 4,2,1, 5,2,1, 5,2,1, 
    5,2,1, 6,2,1, 5,2,2, 2,2,1, 3,2,1, 1,2,2, 1,2,1, 6,1,1, 2,2,1, 2,2,1, 
    3,2,1, 3,2,1, 1,2,1, 5,2,1, 1,2,1, 5,2,1, 1,2,1, 7,1,1, 1,2,1, 1,2,1, 6,1,1, 
    2,2,1, 2,2,1, 3,2,1, 3,2,1, 5,2,1, 5,2,1, 
    5,2,1, 6,2,1, 5,2,2, 2,2,1, 3,2,1, 1,2,2,  
    5,1,1, 1,2,1, 2,1,2, 3,2,1, 2,2,1, 3,2,1, 4,2,1, 5,2,1, 5,2,1, 5,2,1, 
    4,2,1, 3,2,1, 2,2,3, 5,1,1, 1,2,1, 2,2,1, 3,2,1, 2,2,1, 3,2,1, 4,2,1, 
    5,2,1, 5,2,1, 5,2,2, 2,2,1, 3,2,1, 1,2,2, 1,2,1, 6,1,1, 2,2,1, 2,2,1, 
    3,2,1, 3,2,1, 1,2,2, 5,2,1, 1,2,1, 5,2,1, 5,2,1, 7,1,1, 1,2,1, 0,0,0 };

//《世上只有妈妈好》
unsigned char code song4[]={
    6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 6,2,1,
     //6,2,3代表6,中音,3个半拍;
     //5,2,1代表5,中音,1个半拍;
     //3,2,2代表3,中音,2个半拍;
     //5,2,2代表5,中音,2个半拍;
     //1,3,2代表1,高音,2个半拍;
     //...
    5,2,1,6,2,4, 3,2,2, 5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,6,1,1, 5,2,1, 
    3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2, 5,2,1, 6,2,1, 3,2,2, 2,2,2, 
    1,2,4, 5,2,3, 3,2,1,2,2,1, 1,2,1, 6,1,1, 1,2,1, 5,1,6, 0,0,0};

//《当你孤单你会想起谁》
unsigned char code song5[]={
    3,2,2, 3,2,1, 4,2,1, 3,2,2, 2,2,1, 1,2,1,  2,2,2, 5,2,2, 2,2,2, 2,2,3,
    1,2,2, 1,2,1, 2,2,1, 1,2,2, 7,1,1, 6,1,1, 7,1,2, 3,2,2, 7,1,2, 7,1,3, 
    6,1,2, 2,2,1, 3,2,1, 2,2,1, 1,2,1, 6,1,2, 5,1,2, 2,2,1, 3,2,1, 2,2,1, 
    1,2,1, 6,1,2, 6,1,2, 2,2,1, 3,2,1, 2,2,1, 1,2,1, 6,1,1, 7,1,1, 1,2,6, 0,0,0 };

//《乡间小路》
unsigned char code song6[]={
    3,1,2, 3,1,1, 3,1,1, 6,0,1, 6,0,1, 1,1,2,
    6,0,1, 5,0,1, 6,0,4, 6,0,2, 6,0,1 ,6,0,1, 6,0,2, 6,0,1, 1,1,1, 
    2,1,2, 2,1,1, 3,1,1, 2,1,4, 3,1,1, 3,1,1, 3,1,1, 2,1,1, 4,1,2,
    4,1,2, 3,1,2, 2,1,1, 1,1,1, 2,1,4, 7,0,1, 7,0,1, 7,0,1, 6,0,1, 
    5,0,1, 5,0,1, 6,0,1, 7,0,1, 7,0,1, 6,0,1, 5,0,1, 6,0,4, 6,1,2,
    3,1,1, 6,1,1, 7,1,1, 6,1,1, 5,1,1, 5,1,2, 5,1,1, 2,1,1, 5,1,1, 
    6,1,1, 5,1,1, 4,1,1, 4,1,2, 4,1,1, 3,1,1, 2,1,2, 1,1,1, 2,1,1, 
    3,1,1, 2,1,1, 1,1,1, 2,1,1, 3,1,4, 6,1,2, 3,1,1, 6,1,1, 7,1,1, 
    6,1,1, 5,1,1, 5,1,2, 2,1,1, 5,1,1, 6,1,1, 5,1,1, 4,1,1, 0,0,0};     

//《送别》
unsigned char code song7[]={
    5,1,2, 3,1,3, 5,1,1, 1,2,3, 6,1,2, 1,2,2, 
    5,1,4, 5,1,2, 1,1,1, 2,1,1, 3,1,2, 2,1,1, 1,1,1, 2,1,4, 5,1,2, 
    3,1,1, 5,1,1, 1,2,2, 7,1,1, 6,1,2, 1,2,2, 5,1,4, 5,1,2, 2,1,1, 
    3,1,1, 4,1,2, 7,0,1, 1,1,4, 6,1,2, 1,2,2, 1,2,4, 7,1,2, 6,1,1,
    7,1,1, 1,2,4, 6,1,1, 7,1,1, 1,2,1, 6,1,1, 6,1,1, 5,1,1, 3,1,1, 
    1,1,1, 2,1,8, 5,1,2, 3,1,1, 5,1,1, 1,2,2, 7,1,1, 6,1,2, 1,2,2, 
    5,1,4, 5,1,2, 2,1,1, 3,1,1, 4,1,2, 7,0,2, 1,1,4, 0,0,0};

//《最浪漫的事》
unsigned char code song8[]={
    5,1,1, 6,1,1, 1,2,1, 6,1,2, 6,1,1, 5,1,1, 6,1,1, 5,1,1, 3,1,1, 5,1,5, 
    5,1,1, 6,1,1, 1,2,1, 6,1,2, 6,1,1, 5,1,1, 6,1,1, 5,1,1, 6,1,1, 1,1,5, 
    1,1,1, 2,1,1, 3,1,1, 2,1,1, 2,1,1, 2,1,1, 1,1,1, 2,1,1, 1,1,1, 6,1,1, 
    3,1,2, 2,1,3, 5,1,1, 6,1,1, 1,2,1, 6,1,2, 6,1,1, 5,1,1, 6,1,1, 5,1,1, 
    6,1,1, 1,1,5, 1,1,1, 2,1,1, 3,1,1, 4,1,2, 4,1,1, 5,1,1, 6,1,1, 6,1,1, 
    5,1,1, 6,1,2, 1,2,1, 6,1,3, 1,2,1, 6,1,1, 5,1,1, 5,1,4, 1,1,1, 6,1,1, 
    5,1,5, 5,1,1, 6,1,1, 1,2,1, 3,1,1, 2,1,1, 3,1,1, 1,1,6, 0,0,0}; 

// 频率-半周期数据表 高八位  共保存了四个八度的28个频率数据
unsigned char code FREQH[]={
    0xF2, 0xF3, 0xF5, 0xF5, 0xF6, 0xF7, 0xF8,    //低音1234567
    0xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC,//1,2,3,4,5,6,7,i
    0xFC, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE,            //高音 234567
    0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF};   //超高音 1234567

// 频率-半周期数据表 低八位
unsigned char code FREQL[]={
    0x42, 0xC1, 0x17, 0xB6, 0xD0, 0xD1, 0xB6,    //低音1234567
    0x21, 0xE1, 0x8C, 0xD8, 0x68, 0xE9, 0x5B, 0x8F, //1,2,3,4,5,6,7,i
    0xEE, 0x44, 0x6B, 0xB4, 0xF4, 0x2D,             //高音 234567
    0x47, 0x77, 0xA2, 0xB6, 0xDA, 0xFA, 0x16};   //超高音 1234567

void main(void)
{

    Timer0_Init();
    Timer1_Init();
    DS1302_Init();
    // DS1302_Write_Time();
    LCD_Init();
    DelayMs(10);
    LCD_Clear();
    LCD_DispStr(0, 0, "    MusicBox    ");
    DelayS(2);
    LCD_Clear();

    while (1)
    {

        if (setTimeFlag == 1)
        {
            SetTime();
        }
        else
        {
            DS1302_Read_Time();
            PlayMusic(); //根据当前状态播放相应歌曲的某个音符
            if (dispSongFlag == 1)
            {
                DispMusic();
                dispSongFlag = 0;
            }
        }

        if (dispTimeFlag == 1) //每200ms刷新一次屏幕
        {
            DispTime();
            dispTimeFlag = 0;
        }

        KeyScan();
    }
}

void DelayOfBeat(unsigned char t) //延时子函数,控制发音的时间长度,每个节拍0.4S
{
    unsigned char t1;
    unsigned long t2;
    for (t1 = 0; t1 < t; t1++) //嵌套循环, 共延时t个半拍
    {
        for (t2 = 0; t2 < 8000; t2++) //延时期间, 可进入T0中断去发音
        {
            ;
        }
    }
    TR0 = 0; //关闭T0, 停止发音
}

void PlayOneNote(void) //演奏一个音符
{
    TH0 = FREQH[g_fre];      //下次的中断时间,这个时间控制音调高低
    TL0 = FREQL[g_fre];
    TR0 = 1;     //启动T0, 由T0输出方波发音
    DelayOfBeat(beatTime); //每个音符的演奏时间
}

void PlayMusic(void) //播放相应歌曲的某个音符
{
    if (musicNum == 0)
    {
        beatTime = 0;
        PlayOneNote(); //发出一个音符
    }

    if ((musicNum == 1) && (playEnFlag == 1))
    {
        g_fre = song1[noteCnt] + 7 * song1[noteCnt + 1] - 1; //第i个是音符,第i+1个是第几个八度
        beatTime = song1[noteCnt + 2]; //读出时间长度数值
        noteCnt += 3;
        if (g_fre < 0) //判断歌曲的结束位,结束后转到下一首
        {
            noteCnt = 0; //下一首从头播放
            musicNum = 2;
        }
        PlayOneNote(); //发出一个音符
        
    }
    
    if ((musicNum == 2) && (playEnFlag == 1))
    {
        g_fre = song2[noteCnt] + 7 * song2[noteCnt + 1] - 1;
        beatTime = song2[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 3;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 3) && (playEnFlag == 1))
    {
        g_fre = song3[noteCnt] + 7 * song3[noteCnt + 1] - 1;
        beatTime = song3[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 4;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 4) && (playEnFlag == 1))
    {
        g_fre = song4[noteCnt] + 7 * song4[noteCnt + 1] - 1;
        beatTime = song4[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 5;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 5) && (playEnFlag == 1))
    {
        g_fre = song5[noteCnt] + 7 * song5[noteCnt + 1] - 1;
        beatTime = song5[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 6;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 6) && (playEnFlag == 1))
    {
        g_fre = song6[noteCnt] + 7 * song6[noteCnt + 1] - 1;
        beatTime = song6[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 7;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 7) && (playEnFlag == 1))
    {
        g_fre = song7[noteCnt] + 7 * song7[noteCnt + 1] - 1;
        beatTime = song7[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 8;
        }
        PlayOneNote();
    }
    
    if ((musicNum == 8) && (playEnFlag == 1))
    {
        g_fre = song8[noteCnt] + 7 * song8[noteCnt + 1] - 1;
        beatTime = song8[noteCnt + 2];
        noteCnt += 3;
        if (g_fre < 0)
        {
            noteCnt = 0;
            musicNum = 1;
        }
        PlayOneNote();
    }
    
}

void KeyScan() //矩阵按键程序
{
    static unsigned char keyIdle = 0;
    static unsigned char keyBuf;
    static unsigned char cnt = 0;

    keyValue = 20; //按键值还原
    P2 = 0x0f;
    if ((P2 & 0x0f) != 0x0f) //按键按下
    {
        DelayMs(1); //按键消抖动
        if (((P2 & 0x0f) != 0x0f) && (keyIdle == 1))
        { //确认是按键按下
            keyIdle = 0;
            keyBuf = (P2 | 0xf0); //矩阵键盘扫描
            P2 = keyBuf;
            if (setTimeFlag == 1)
            {
                switch (P2)
                {
                case 0xee:
                    switch (setLocation)
                    {
                    case 1:
                    {
                        if (timeBufDec[1] == 0)
                        {
                            timeBufDec[1] = 100;
                        }
                        timeBufDec[1]--;
                        break;
                    }
                    case 2:
                    {
                        timeBufDec[2]--;
                        if (timeBufDec[2] < 1)
                        {
                            timeBufDec[2] = 12;
                        }
                        break;
                    }
                    case 3:
                    {
                        timeBufDec[3]--;
                        if (timeBufDec[3] < 1)
                        {
                            timeBufDec[3] = YDay(timeBufDec[1], timeBufDec[2]);
                        }
                        break;
                    }
                    case 4:
                    {
                        if (timeBufDec[4] == 0)
                        {
                            timeBufDec[4] = 24;
                        }
                        timeBufDec[4]--;
                        break;
                    }
                    case 5:
                    {
                        if (timeBufDec[5] == 0)
                        {
                            timeBufDec[5] = 60;
                        }
                        timeBufDec[5]--;
                        break;
                    }
                    case 6:
                    {
                        timeBufDec[7]--;
                        if (timeBufDec[7] < 1)
                        {
                            timeBufDec[7] = 7;
                        }
                        break;
                    }
                    default:;
                    }
                    break;
                case 0xde:
                    switch (setLocation)
                    {
                    case 1:
                    {
                        timeBufDec[1]++;
                        if (timeBufDec[1] >= 100)
                        {
                            timeBufDec[1] = 0;
                        }
                        break;
                    }
                    case 2:
                    {
                        timeBufDec[2]++;
                        if (timeBufDec[2] >= 13)
                        {
                            timeBufDec[2] = 1;
                        }
                        break;
                    }
                    case 3:
                    {
                        timeBufDec[3]++;
                        if (timeBufDec[3] >= YDay(timeBufDec[1], timeBufDec[2]) + 1)
                        {
                            timeBufDec[3] = 1;
                        }
                        break;
                    }
                    case 4:
                    {
                        timeBufDec[4]++;
                        if (timeBufDec[4] >= 24)
                        {
                            timeBufDec[4] = 0;
                        }
                        break;
                    }
                    case 5:
                    {
                        timeBufDec[5]++;
                        if (timeBufDec[5] >= 60)
                        {
                            timeBufDec[5] = 0;
                        }
                        break;
                    }
                    case 6:
                    {
                        timeBufDec[7]++;
                        if (timeBufDec[7] > 7)
                        {
                            timeBufDec[7] = 1;
                        }
                        break;
                    }
                    default:;
                    }
                    break;
                case 0xbe: 
                        setLocation = 7; //确定键
                        break;
                default:;
                }
            }
            else
            {
                if (musicNum == 0)
                {
                    dispTimeFlag = 0;
                    switch (P2)
                    {
                    case 0xee:
                        keyValue = 0;
                        g_fre = 8;
                        TR0 = 1;
                        break; //得到按键值  //打开定时器
                    case 0xde:
                        keyValue = 1;
                        g_fre = 9;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xbe:
                        keyValue = 2;
                        g_fre = 10;
                        TR0 = 1;
                        break; //得到按键值
                    case 0x7e:
                        keyValue = 3;
                        g_fre = 11;
                        TR0 = 1;
                        break; //得到按键值

                    case 0xed:
                        keyValue = 4;
                        g_fre = 12;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xdd:
                        keyValue = 5;
                        g_fre = 13;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xbd:
                        keyValue = 6;
                        g_fre = 14;
                        TR0 = 1;
                        break; //得到按键值
                    case 0x7d:
                        keyValue = 7;
                        g_fre = 15;
                        TR0 = 1;
                        break; //得到按键值

                    case 0xeb:
                        keyValue = 8;
                        g_fre = 16;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xdb:
                        keyValue = 9;
                        g_fre = 17;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xbb:
                        keyValue = 10;
                        g_fre = 18;
                        TR0 = 1;
                        break; //得到按键值
                    case 0x7b:
                        keyValue = 11;
                        g_fre = 19;
                        TR0 = 1;
                        break; //得到按键值

                    case 0xe7:
                        keyValue = 12;
                        g_fre = 20;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xd7:
                        keyValue = 13;
                        g_fre = 21;
                        TR0 = 1;
                        break; //得到按键值
                    case 0xb7:
                        keyValue = 14;
                        g_fre = 22;
                        TR0 = 1;
                        break; //得到按键值
                    case 0x77:
                        keyValue = 15;
                        g_fre = 23;
                        TR0 = 1;
                        break; //得到按键值
                    }
                }
                else
                {
                    switch (P2)
                    {
                    case 0xee:
                        dispSongFlag = 1;
                        noteCnt = 0;
                        if (musicNum <= 1) //上一曲
                        {
                            musicNum = MUSIC_AMOUNT;
                        }
                        else
                        {
                            musicNum--;
                        }
                        break; 
                    case 0xde:
                        dispSongFlag = 1;
                        noteCnt = 0;
                        if (musicNum >= MUSIC_AMOUNT) //下一曲
                        {
                            musicNum = 1;
                        }
                        else
                        {
                            musicNum++;
                        }
                        break; 
                    case 0xbe: 
                        playEnFlag = 1; //播放
                        break;
                    case 0x7e:
                        playEnFlag = 0; //暂停
                        TR0 = 0;
                        break; 
                    }
                }
            }
            while (P2 != 0x0f)
                P2 = 0x0f;
            TR0 = 0; //关闭定时器
        }
    }
    else //按键松开
    {
        keyIdle = 1;
    }

    /*********************歌曲播放*********************/
    KEY_SET = 1;
    if (!KEY_SET)
    {
        DelayMs(10); //按键去抖动
        while (!KEY_SET)
        {
            DelayMs(20);
            cnt++;
            if (cnt >= 75)
            {
                break;
            }
        }

        if (cnt >= 50) //长按键处理
        {
            TR0 = 0;
            setTimeFlag = 1;
            setLocation++;
        }
        else 
        {
            if (setTimeFlag)
            {
                setLocation++;
            }
            else
            {
                if (musicNum != 0)
                {
                    dispSongFlag = 1;
                    musicNum = 0;
                    noteCnt = 0;
                    TR0 = 0;
                }
                else
                {
                    dispSongFlag = 1;
                    musicNum = 1;
                    noteCnt = 0;
                }
            }
        }
        
        cnt = 0;
        while (!KEY_SET);
    }
}

void SetTime()
{
    TR1 = 0;
    LCD_WriteCommand(0x0F, 0); //打开闪烁
    // LCD_WriteCommand(0x0C, 0);
    switch (setLocation)
    {
        case 1: LCD_WriteCommand(0x80 + 1, 0); break;
        case 2: LCD_WriteCommand(0x80 + 4, 0); break;
        case 3: LCD_WriteCommand(0x80 + 7, 0); break;
        case 4: LCD_WriteCommand(0x80 + 0x40 + 1, 0); break;
        case 5: LCD_WriteCommand(0x80 + 0x40 + 4, 0); break;
        case 6: LCD_WriteCommand(0x80 + 14, 0); break;
        case 7: 
        {
            LCD_WriteCommand(0x0C, 0);
            LCD_WriteCommand(0x0C, 0);
            DS1302_Write_Time();
            setLocation = 0;
            setTimeFlag = 0;
            TR0 = 1;
            break;
        }
        default: ;
    }
    TR1 = 1;
}

void DispTime()
{

    dispRow0[0] = timeBufDec[1] / 10 +'0';
    dispRow0[1] = timeBufDec[1] % 10 +'0';
    dispRow0[3] = timeBufDec[2] / 10 +'0';
    dispRow0[4] = timeBufDec[2] % 10 +'0';
    dispRow0[6] = timeBufDec[3] / 10 +'0';
    dispRow0[7] = timeBufDec[3] % 10 +'0';

    dispRow1[0] = timeBufDec[4] / 10 +'0';
    dispRow1[1] = timeBufDec[4] % 10 +'0';
    dispRow1[3] = timeBufDec[5] / 10 +'0';
    dispRow1[4] = timeBufDec[5] % 10 +'0';
    // dispRow1[6] = timeBufDec[6] / 10 +'0';
    // dispRow1[7] = timeBufDec[6] % 10 +'0';

    LCD_DispStr(0, 0, dispRow0);
    LCD_DispStr(0, 1, dispRow1);

    switch (timeBufDec[7])
    {
        case 1: LCD_DispStr(10, 0, " Sun."); break;
        case 2: LCD_DispStr(10, 0, " Mon."); break;
        case 3: LCD_DispStr(10, 0, " Tue."); break;
        case 4: LCD_DispStr(10, 0, " Wed."); break;
        case 5: LCD_DispStr(10, 0, "Thur."); break;
        case 6: LCD_DispStr(10, 0, " Fri."); break;
        case 7: LCD_DispStr(10, 0, " Sat."); break;
        
        default: LCD_DispStr(10, 0, " Sun.");;
    }
}

void DispMusic()
{
    unsigned char table[] = "Music   ";

    if (musicNum == 0)
    {
        LCD_DispStr(7, 1, "KeyBoard");
    }
    else
    {
        table[6] = musicNum / 10 + '0';
        table[7] = musicNum % 10 + '0';
        LCD_DispStr(7, 1, table);
    }
}

void Timer0_Init()
{
    TMOD &= 0xF0;
    TMOD |= 0x01; //T0 T1 均在工作方式1
    TR0 = 0;
    ET0 = 1;     //T0开中断
    EA = 1;      //CPU开中断
}

void Timer1_Init()
{
    TMOD &= 0x0F;
    TMOD |= 0x10; //T0 T1 均在工作方式1
    TH1 = (65536 - 18432) / 256; //定时20ms
    TL1 = (65536 - 18432) % 256;
    TR1 = 1;
    ET1 = 1;     //T0开中断
    EA = 1;      //CPU开中断
}

void Timer0(void) interrupt 1 //T0中断程序,控制发音的音调
{
    SPEAKER = !SPEAKER; //输出方波, 发音
    TH0 = FREQH[g_fre];      //下次的中断时间,这个时间控制音调高低
    TL0 = FREQL[g_fre];
}

void Timer1(void) interrupt 3 //T1中断程序
{
    static unsigned char cnt = 0;

    TH1 = (65536 - 18432) / 256; //定时20ms
    TL1 = (65536 - 18432) % 256;

    cnt++;

    if (cnt >= 10)
    {
        dispTimeFlag = 1;
        cnt = 0;
    }
}
//程序结束

仿真演示视频：


https://www.bilibili.com/video/BV1Be4y1p7w4/

实物演示视频：


https://www.bilibili.com/video/BV17P411u7MA/


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