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
2024-04-22 02:14:52
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：
PCB ：
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12345670xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC,//1,2,3,4,5,6,7,i0xFC, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, //高音 2345670xFE, 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12345670x21, 0xE1, 0x8C, 0xD8, 0x68, 0xE9, 0x5B, 0x8F, //1,2,3,4,5,6,7,i0xEE, 0x44, 0x6B, 0xB4, 0xF4, 0x2D, //高音 2345670x47, 0x77, 0xA2, 0xB6, 0xDA, 0xFA, 0x16}; //超高音 1234567void 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1TR0 = 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1TH1 = (65536 - 18432) / 256; //定时20msTL1 = (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20msTL1 = (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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