基于51单片机的音乐播放器

单片机音乐播放器设计报告学生：XXX 指导教师：XXX内容摘要：单片机具有体积小、功能强、成本低、应用面广等优点，可以说，智能控制与自动控制的核心就是单片机。

根据要求设计一款音乐播放器，能实现音乐播放的简单功能，同时为了美化，添加了韵律闪烁彩灯，设计时采用Keil软件编程，用protues软件仿真，核心器件采用灵活性高且价格低廉的AT89C51芯片。

设计完成后系统可播放自编歌曲，同时发光二极管随着歌曲韵律闪烁。

关键词：单片机 AT89C51 音乐播放英文标题Abstract: SCM has small, strong function, low cost, application, advantages and intelligent control and automatic control of the core is the microcontroller. According to the requirements of a music player, design of music broadcast can realize simple function, and to beautify, added rhythm flashing lights, design is used when Keil C software programming, with protues software simulation, the core device adopts high flexibility and the price is cheap AT89C51 chip. The design is completed system can play Wrote songs, and leds with songs rhythm flicker.Keywords:SCM Temperature AT89C51 Music broadcast前言:微机原理和接口技术是一门实践性强的学科，不但要求有较高的理论水平，而且还要求有实际的动手能力，其中很多的原量、规则、现象等仅仅靠学习教科书是无法完全掌握的，必须通过实践才能比较直观和深刻的理解。

目录前言 (I)第1章绪论 (2)§1.1课题研究背景和意义 (2)§1.2研究的主要内容 (5)第2章设计方案选择 (7)§2.1设计方案 (7)§2.2选定最终设计方案 (8)第3章MP3系统硬件设计 (9)§3.1 MP3系统硬件设计的原则 (9)§3.2主控CPU的性能介绍和原理图 (10)§3.3调试接口电路 (13)§3.4 Flash存储系统 (14)§3.5电源系统部分 (15)§3.6音频和功率放大电路 (17)§3.7 MP3的原理图和PCB图 (18)第4章MP3系统软件设计 (22)第5章实验结果 (25)结论 (26)参考文献 (27)致谢 (28)附录 (29)外文资料译文 (59)摘要随着科学技术的发展，带数字语音功能的嵌入式终端类产品在日常生活中得到了广泛的使用，这也促进了与该功能相关的数字音频压缩技术的发展，在数字音频压缩技术中，MP3以其优异的性能得到了广泛的使用。

现在，具备MP3功能已成为嵌入式终端类产品的发展趋势之一。

本文介绍了一种基于51单片机的MP3播放器设计方案。

它采用ATMEL 公司专门针对MP3设计需求出品的AT89C51SND1C芯片。

文章详细论述了MP3播放器的硬件和软件结构设计流程，采用Protel99se软件画出原理图、制做印刷电路板，通过Keil编程软件对MP3软件设计中的文件解码程序、按键控制程序、USB通讯控制程序和FAT文件管理程序进行编程，通过电脑的串口和相应的软件进行调试,实现MP3实时解码过程。

实验表明，该系统工作达到了设计要求，为后续的嵌入式系统研发打下了基础，具有一定的实用价值。

关键词：单片机，MP3，AT89C51SND1C，USB，FATMP3 PLAYER DESIGN BASED ON 51 SINGLE-CHIPABSTRACTAlong with the development of science and technology, the embedded terminal products with digital audio function is widely used in our daily life, and the associated digital audio compression technologies are also highly developed, MP3 is the most popular one in various digital audio compression technologies according it’s excellent performance. Now, with MP3 function have became the trends of the embedded terminal products.This paper introduce a MP3 player design based on 51microcontroller.It uses AT89C51SND1C chip,which ATMEL company produce for MP3 design requiresments.We detailed discuss the MP3 player hardware and software design process,use Protel99se software to draw MP3 schematic, make printed circuit boards, through Keil programming software design MP3 software,such as file decoding procedures, key control procedures, USB communication and control procedures,and FAT file management procedures and programming procedures, use the computer's serial port and the corresponding software debug programs, realize real-time MP3 decoding. The experiment results show that the system meets the design requirements, creat the condition of the subsequent development of embedded systems, and has some practical value.KEY WORDS:Single chip,MP3,AT89C51SND1C,USB,FAT前言嵌入式技术作为在信息、网络与服务等支撑发展中最重要的实用技术之一，已经开始广泛应用于移动通信、消费电子、无线网络、工业控制和军事国防等社会生活的各个领域。

基于C51单片机的MP3播放器的硬件系统设计原理相关专题：电子应用时间：2012-04-01 09:11 来源：icbuy亿芯网便携式MP3播放器作为一种集音频播放、数据存储为一身的数码产品，其功能结构为电子设计人员所津津乐道。

MP3是MPEG一1音频III(1ayerIII)的简称。

MPEG一1音频(ISO／IECll 172―3)是目前普遍应用的音频压缩标准，其中层III的算法最为复杂，但压缩比最大，效果也最好，在低码率的条件下基本能达到CD的音质效果。

MP3标准用尽可能低的码流实现CD音质的声音而不会产生数据损失。

如果对于一段声音不进行压缩的话，那么每存储一秒钟的立体声CD音质音乐必须用1．4Mbit，这是个十分大的开销。

通过运用MPEG音频标准的压缩技术，我们可以把存储空间压缩到原来的1／12而不会降低声音的音质。

即使使用1／24的压缩因子，仍然比单纯降低采样率的音质要好。

低数据量和高播放品质的优点使其成为音乐存储、数字广播、网上音乐传输的主要方式。

人们不仅可以使用计算机软件，还可以通过数字随身听来欣赏音乐。

本设计以C51内核单片机为核心，设计了MP3播放器。

1 MP3硬件设计在该硬件系统的设计中，采用Atme 1公司生产的AT89C51SNDlC作为主控MCU。

AT89C5lSNDlC是ATMEL公司专门针对MP3的需求而设计的一款多媒体8位微处理器，使用通用的C51内核，片上集成了多种外设，为MP3产品提供了一套方便的解决方案。

该芯片对电路的高度集成大大降低了系统的耗电和发热，提高了系统的稳定性和速度，抗干扰能力也显著增强。

AT89C51SNDlC具有如下外设的集成，大大简化了电路的设计：a．MP3硬件解码器；b．可编程音频输出接口DAC；c．8位MCU C51：d．USBl．1控制器；e．内建锁相环PLL；f．多媒体卡接口适配器；g．SPI接口适配器；h．IDE／ATAPI接口；i．两路10位ADC，8kHz；j．44个通用I／0；k．两个16位定时器／计数器；1．硬件看门狗定时器；m．标准全工UART；n．两线主被动模式控制器；o．SPI主被动模式控制器；p．电源管理模块。

(精品)51单片机音乐播放器程序【整理】/*-----------------------------------------------名称:音乐播放日期:2009.5修改:无内容:------------------------------------------------*/#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义sbit speaker=P1^2; //定义音乐输出端口，需要连接到对应的喇叭，请参考电路图unsigned char timer0h,timer0l,time;//世上只有妈妈好数据表code unsigned char sszymmh[]={ 6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 6,2,1, 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};// 音阶频率表高八位code unsigned char FREQH[]={0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,} ;// 音阶频率表低八位code unsigned char FREQL[]={0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,};/******************************************************************/ /* 延时函数 *//******************************************************************/ void delay(unsigned char t){unsigned char t1;unsigned long t2;for(t1=0;t1<t;t1++){for(t2=0;t2<8000;t2++){;}}TR0=0;}/******************************************************************/ /* 定时器中断函数 *//******************************************************************/ void t0int() interrupt 1{TR0=0;speaker=!speaker;TH0=timer0h;TL0=timer0l;TR0=1;}/******************************************************************/ /* 音乐处理函数 *//******************************************************************/ void song(){TH0=timer0h;TL0=timer0l;TR0=1;delay(time);}/******************************************************************/ /* 主函/******************************************************************/ void main(void){unsigned char k,i;TMOD=1; //置CT0定时工作方式1EA=1;ET0=1;//IE=0x82 //CPU开中断,CT0开中断while(1){i=0;while(i<100){ //音乐数组长度，唱完从头再来k=sszymmh[i]+7*sszymmh[i+1]-1;timer0h=FREQH[k];timer0l=FREQL[k];time=sszymmh[i+2];i=i+3;song();}}}。

题目：音乐播放器课程设计（论文）任务书课程设计（论文）题目：音乐播发器基本内容：利用单片机的定时器产生各种频率的方波，信号经过放大后送到喇叭从而产生各种音调。

自行定义键盘，每按一键，可选择一首歌曲进行演奏，至少能够存储并播放十首歌曲，在LCD上显示演奏歌曲的名称并滚动显示歌词，单片机可连续播放这首歌曲，演奏可通过按键停止。

课程设计（论文）专题部分：题目：音乐播放器基本内容：通过单片机设计可以播放十首歌曲的音乐播放器，同步显示歌曲名称和歌词。

学生接受毕业设计（论文）题目日期第19 周指导教师签字：2009年7月摘要随着电子技术的发展和计算机越来越普遍的使用，单片机作为这两项技术的有机结合也得到了广泛的应用，在某些领域具有不可替代的作用。

音乐播放功能随处都会用到，如，在开发儿童智力的玩具中，等等。

目前，基于单片机实现音乐播放，其体积小、价格低、编程灵活等特点在这一领域独领风骚。

单片机的英文名称为single chip microcomputer，最早出现在20世纪70年代，国际上现在已逐渐被微控制器（Microcontroller Unit 或MCU）一词所取代。

它体积小，集成度高，运算速度快，运行可靠，功耗低，价格廉，因此在数据采集、智能化仪表、通讯设备等方面得到了广泛应用。

而8051单片机在小到中型应用场合很常见，已成为单片机领域的实际标准。

随着硬件的发展，8051单片机系列的软件工具也有了C级编译器和实时多任务操作系统RTOS，为单片机编程使用C语言提供了便利的条件；并针对单片机常用的接口芯片编制通用的驱动函数，可针对常用的功能模块，算法等编制相应的函数；C语言模块化程序结构特点，可以使程序模块大家共享，不断丰富，这样就使得单片机的的程序设计更简单可靠，实时性强，效率高。

作为测控技术与仪器的学生，掌握8051单片机硬件基础及其相关软件操作，将其应用于现代电子产品中是必要而且重要的，这次课程设计我们的题目是用单片机实验箱系统制作音乐播放器。

图2 蜂鸣器电路控制电路图4 仿真调试6.2性能分析用AT89C51单片机的I/O口产生一定频率的方波，驱动蜂鸣器，出不同的音调，从而演奏乐曲。

共有4支乐曲，每首乐曲都由相应的按键控制，并且有开关键、暂停键、上一曲以及下一曲控制键。

将源程序导入单片机后，在proteus软件中进行仿真。

我通过仿真发现，按下按8 总结通过对单片机的学习，发现对单片机的硬件设计，软件设计掌握的a您好，为你提供优秀的毕业论文参考资料，请您删除以下内容，O(∩_∩)O谢谢！！！A national survey was recently launched to evaluate the eye health of Chinese children andteenagers.On June 6, China 's annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading li sted Chinese pharmaceutical company, jointlyannounced the kickoff of the survey.In about one month, a questionnair e compiled by top eye care medical experts in China willbe distributed through multiple online partners, including He , as well asthrough offline survey events held in universities, middle schools and primary schools acrosst he country.A report will be released based on the survey statistics and analysis, and most importantly,guidelines for pa rents and youth on how to care for the eyes and prevent myopia — agrowing problem in China's digitized society, will also be attached on the report."Myopia is not only a disease that makes people see things blurrily, but also leads to sev erecomplications, such as glaucoma (increased pressure within the eyeball), and can causeblindness," said Zhou Yueh ua, an established eye care specialist with Beijing TongrenHospital."It is very important for parents and children to k now about the risk and care for their eyes."There are about 450 million myopia patients in China. Among Chinese my opia patients,30million are severe patients, according to ZhouThe prevalence of myopia among high school and colleg e students is more than 70 percent,and the situation is continuously worsening, he added.Sun Zhu, director with the C hina Youth Development Service Center, said long hours ofstudy, lack of exercise, especially outdoor activities, and att achment to electronic screen aresome of the top reasons behind the widespread myopia problems, and the increase ofy ounger patients, although China has made great progress in improving the hardwarefacilities and lighting conditions i n schools.He said he hopes the survey will alert people on the threatening situation, and also helpmedical experts to be tter guideline parents and children's behaviors to care for eyes, basedon the timely and factual statistics the survey col lected.A series of follow-up events will also be held in six cities, including Jinan in Shandongprovince, and Changsha i n Hunan province, to educate people on how to care for eyes afterthe survey started. More and more Chinese are jogging to get and stay fit. Most joggers will run alone, but some will jog with friends or even coaches. The Beijing Olympic Forest Park is one of the most popular spots. It is packed with runners in the afternoon, usually after work, and at weekends. Jogging after a whole day's work can be a way to unwind. It is true for He Wenjun, whose workplace is right near the forest park. She discovered her athletic aptitude at the age of seven, when she began playing tennis. Then she turned to jogging, and she has persevered with it for 10 years. "I come to jog almost every day after work, whenever I have time. I think jogging is good for my health. And for me, a girl, it helps me to achieve to eternal goal, to keep slim," He said. He says she prefers jogging alone, so she can focus better. She loves jogging, even during Beijing's smoggy days. "If the smog is severe, I'll hold off jogging for a while. But if I really want to get away from work, I'll wear a mask, or just ignore the smog and go on jogging," she said. For those who are not so athletic, jogging also has its attractions. Wu Houbin started roughly two years ago, when he was severely obese. Within two months, his weight dropped from 82 kilograms to 64 kilograms. The success helped him recover health, and he has made friends. "Jogging does not require speed, but stamina. If you want to stick to the game, you need to take it as a mission, a habit, and then eventually a hobby," Wu said. But persevering with jogging is not always easy. Jogging is beneficial for heart-lung function, and the skeletal system, but doctors say improper technique damages the joints, especially the knees and ankles. "Excessive jogging wears down the body, and harms one's health. Poor technique harms the muscles and skeleton, and can cause secondary injures. And, jogging in a bad environment can cause circulation problems," said Lu Zhiyong, attending doctor, Sports Hospital, General Admin. of Sports.Dr. Lu has some tips for joggers, and thosewho are thinking of taking it up.He says peoplesh ould first evaluate their physical condition, to decide the amount and type of exercise, and jogging in the open air is better running on a treadmill. Conrad Macaowill run special programs for the entire month of October this year to support the Hong Kong Cancer Fund's Pink Revolution, an annual campaign that seeks to raise awareness and funds for breast cancer research, the hotel recently announced. A major sponsor of the campaign for three years in a row, Conrad Macao has pledged to donate a portion of its proceeds to the fund,includ ing those collected from selling its popular bear and rubber duck merchandise, in limited pink editions. Pink is the theme for floral arrangements and decorations in the hotel in October. In addition, on Fridays that month, members of the management and staff will add something pink to their uniforms, regular e-mails and handwritten guest cards. "Breast cancer is the most prevalent type of cancer among women in Hong Kong and is also of significant concern in Macao and around the world, regardless of age," general manager Bede Barry said in a statement. The hotel has enlisted the support of a number of international and local celebrities to help drive the cause, including South Korean actor Jung Suk Won. This year, a lucky guest who stays at the hotel during the campaign and also donates money for the cause will win a necklace specially designed by Arte Madrid, a Spanish jewelry brand. Women should strive to balance quality of work and life, and have children at a young age. As a doctor I see much suffering because of this imbalance. Xiao Ying, 36, works for a large law firm. Her job means lots of travel, a heavy caseload and a large number of meetings, so her schedule is hectic. She has been pregnant twice, but had abortions on both occasions because she felt her busy,high-pressure career wasn't conducive to raising a child. She planned to have children once she had achieved career success so she could provide a stable environment for her baby. After 10 years, Xiao felt the time was right, and she tried to conceive for about six months, but was unable to become pregnant. I conducted comprehensive physicalcheckups. The results suggested that Xiao's ovarian function has declined and a bilateral oviduct blockage has occurred, meaning that in vitro fertilization is her only option. So, after reducing her workload, Xiao underwent IVF treatment. Luckily, she got pregnant after just one treatment cycle, but later experienced vaginal bleeding, and rushed to the hospital. I told her to rest and carry on with the treatment (to prevent a miscarriage). As Zubin Zarthoshtimanesh, a yoga guru, demonstrated postures at a high school stadium in Dujiangyan city, Sichuan province, some 200 students sat on colorful mats watching him closely. It was part of the first India-China international yoga festival in the provincial capital, Chengdu, in Southwest China, where more than 1,000 fans from home and abroad gathered for lessons from 20 leading practitioners of the ancient Indian regimen, from June 17-21. Yoga is to India what perhaps tai chi is to China. Many countries other than India and China, also held the first World Yoga Day on June 21, after the United Nations last year agreed to Indian Prime Minister Narendra Modi's suggestion that a special day be marked in the year for the global practice of the stress-busting regimen, which is already a multibillion dollar industry in the United States. Modi said in the speech: "Yoga is an invaluable gift of India's ancient tradition. ... It is not about exercise but to discover the sense of oneness with yourself, the world and nature."Zarthoshtimanesh, who runs his own yoga center, Iyengar Yogabhyasa, in the Indian financial capital of Mumbai, says: "Chinese students are very respectful. For me, all students are the same no matter what their race is and where they come from. The most important thing is to remove mental walls." Zarthoshtimanesh learned yoga from the late Yogacharya Iyengar and traveled with the master to different countries. Consulate General of India in southern China's Guangzhou city organized the Chengdu festival. A terrifying wooden bridge in China has just been replaced by a glass one. This, the world’s longest glass-bottomed walkway, is located in Shiniuzhai Geopark in Hunan, and spans 300m (984f) and is 180m (590f) above ground. The floor is made of double-layered glass that is24mm (0.94in), and is reportedly 25 times stronger than regular window glass. The bridge had previously been made of wood, linking the two peaks of Stone Buddha Mountain, but 11 engineers working 12 hours a day converted it to glass. Previously, you were considered brave if you steeled yourself to cross the wooden walkway; now, with its glass bo ttom, the bridge is already being referred to as “hero bridge.”The popular chain's longtime executive chef embraces mapo tofu and other exotic elements for the burger-driven menu, Liu Zhihua reports.At the age of 37, Shanghai native Lin Zhengu has become a star as a Western cuisine chef in the Chinese metropolis, a city that has a wealth of Western restaurants. The executive chef of Blue Frog Bar and Grill, a popular burger-based restaurant and bar chain on the Chinese mainland, Lin is the soul of the restaurant franchise's team of more than 550 chefs. Many of the franchise's most popular dishes are his brainchild. Lin says his secret of success is innovation rooted in experience: He spends months every year traveling and eating worldwide, seeking new ingredients and inspirations that could improve the offerings of Blue Frog restaurants. The restaurant chain regularly launches a new seasonal menu, usually featuring eight new dishes with fresh ingredients. The best-selling seasonal dishes later replace the least popular items on the regular menu, which is usually updated in late fall and boasts a selection of about 40 dishes. "Food should have no boundaries," Lin says. "As long as the food tastes good and is healthy, it doesn't really matter where it originates or how it is cooked." Lin likes to give the American-style restaurants' menu some culinary touches from other countries, such as China and Mexico, and customers love such innovation, he says. He started his career as an apprentice in a Chinese kitchen in 1993. By chance he learned from a French chef in 1994, and soon became enamored with the world of Western food. During the next couple of years, he received strict training in Western culinary art from French, Chinese and German chefs. That was rare for a Chinese chef in the 1990s, he says－and so was being a Chinese chef who spoke fluent English. When an American entrepreneur invited him to join in his startup Blue Frog in 2000, Lin didn't hesitate to resign from a five-star hotel to work in the new restaurant with just five chefs, eager to explore the excitement of a life that had yet to unfold. Since that Shanghai launch, Blue Frog has opened 24 branches in seven cities across China, including Beijing, Tianjin, Chongqing and Nanjing in Jiangsu province. The new menu for this fall, which was launched in early September, showcases how flavors of East and West meet to create a variety of delicious burgers and other entrees in the cozy, soft-lit restaurants. I liked the mapo burger best. Just imagine the flavorful combination of the hot, mildly numb-spicy mapo tofu sauce and grilled 100-percent Australian beef patty, along with a slice of cheddar cheese and a side of french fries. The savory sauce helped highlight the patty's juicy, tender texture and its delicious beef flavor. Matching that Sichuan flavor with cheese created a new taste experience.。

图2-1 C51F350单片机播放器系统结构图图2-2SPCE061A 16位单片机音乐播放器硬件结构框图2-3 C52音乐播放器组成框图图3-1 AT89C52引脚排列图图3-2 晶振电路图3-3 微分型复位电路432P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78RST 9 3.0/RXD 10 3.1/TXD 11P3.2/INT012P3.3/INT113P3.4/T014P3.5/T115P3.6/WR 16P3.7/RD 17XTAL118XTAL219Vss 20P2.021P2.122P2.223P2.324P2.425P2.526P2.627P2.728PSEN 29ALE 30EA 31P0.732P0.633P0.534P0.435P0.336P0.237P0.138P0.039VC C 40AT89C52Y112M HZC630PF C730PFX 1X 2VC CR1VC CVC C图3-4 单片机最小系统图a) 八段共阴LED显示管原理图图b) 八段共阳LED显示管原理图图3-5 八段LED显示管原理图[7]图3-7 音乐播放器LED显示电路设计图3-8 LM2575集成稳压器的两种引脚图[11]图3-9 LM2575内部框图图3-10 电源电路的设计电路图[13]图3-11 内部结构图表3-2 音频功率放大器R1 R23.3V 1.0K 1.7K5V 1.0K 3.1K 12V 1.0K 8.84K 15V 1.0K 11.3K 输出电压可调Open 0图3-12 全数字功放与普通功放过载失真度比较图3-13 LM386引脚图图3-14 LM386方块图表3-3 LM386电子特性表图3-15 音频功率放大器[18]图4-1 主程序流程图[20]图4-2 显示子程序的流程图[21]图4-3 INT0中断模块流程[24]图4-4 T1中断模块程序流程图附录A：电气原理图321DC B AC310u FC130pC230pC5100nF+C2100uFY1D1IN5819123456781234567812345678A1LM386R1330uhR1R110KS1S2+C2330VS3OUTFbVinGNDONU2LM2575GNDP1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78RST93.0/RXD103.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.5/T115P3.6/WR16PSEN29XTAL118XTAL219Vss20P2.021P2.122P2.223P2.324P2.425P2.526P2.627P2.728P3.717ALE30EA31P0.732P0.633P0.534P0.435P0.336P0.237P0.138P0.039VCC40U1AT89C52VCC123。

单片机蜂鸣器音乐单片机在我们的生活中无处不在，它被广泛地应用在各种电子产品中，为我们的生活带来了便利。

今天，我要向大家介绍的是一种基于单片机的蜂鸣器音乐播放器。

一、硬件部分1、单片机：我们选用的是AT89C51单片机，它具有低功耗、高性能的特点，非常适合用于音乐播放器。

2、蜂鸣器：蜂鸣器是用来发出声音的，我们将其连接在单片机的输出口上。

3、存储芯片：为了能够播放存储在芯片中的音乐，我们需要将音乐以某种格式存储在芯片中。

常用的存储芯片有EEPROM和Flash芯片。

4、按键：为了能够选择播放不同的音乐，我们需要添加一个按键。

二、软件部分1、音乐编码：我们需要将音乐转换成二进制编码，这样才能被单片机读取并播放。

常用的音乐编码格式有MIDI、WAV等。

2、音乐播放：当按下按键时，单片机读取存储芯片中的音乐数据，并通过蜂鸣器播放。

3、音乐选择：通过按键可以选择不同的音乐进行播放。

4、音量控制：我们可以通过编程来控制蜂鸣器的音量大小。

三、调试与测试1、硬件调试：检查连接是否正确，确保没有短路或断路的情况。

2、软件调试：将程序下载到单片机中进行调试，确保能够正常播放音乐。

3、综合测试：将所有硬件和软件都连接起来进行测试，确保能够正常工作。

四、总结与展望通过本次实验，我们成功地制作了一个基于单片机的蜂鸣器音乐播放器。

它具有简单、实用的特点，可以用来播放存储在芯片中的音乐。

未来，我们可以进一步扩展其功能，例如添加更多的按键来选择不同的音乐、添加显示屏来显示歌曲名称等。

我们也可以将其应用到其他领域，例如智能家居、智能安防等。

单片机蜂鸣器唱歌程序在许多应用中，单片机蜂鸣器经常被用来发出声音或音乐。

下面是一个使用单片机蜂鸣器唱歌的程序示例。

我们需要确定单片机和蜂鸣器的连接方式。

通常，单片机具有一个内置的蜂鸣器输出引脚，可以将蜂鸣器连接到这个引脚上。

在以下的示例中，我们将假设单片机具有一个内置蜂鸣器输出引脚，并将其连接到P1.0端口上。

基于C51单片机的MP3播放器设计一、引言随着科技的不断发展，人们对音乐的需求也越来越高。

MP3播放器作为一种便携式的音乐播放设备，已经成为人们日常生活中不可缺少的一部分。

本文将介绍一种基于C51单片机的MP3播放器设计。

二、硬件设计1.主控芯片：选择C51单片机作为主控芯片，因为它具有较低的成本、较好的性能和广泛的应用。

2.存储器：通过串口与单片机连接一个外部闪存芯片作为存储设备，用于存储MP3文件。

闪存芯片的容量可以根据需求进行选择，一般选择4GB以上的容量。

3.音频解码芯片：为了解码MP3文件并输出音频信号，需要选择一个音频解码芯片。

常用的音频解码芯片有VS10XX系列芯片，可以通过SPI接口与单片机通信。

4.音频输出电路：为了使音频信号能够输出到扬声器或耳机上，需要设计一个音频输出电路。

这个电路一般包括运放、耳机插座等组件。

5.控制界面：为了方便用户对MP3播放器的控制，需要设计一个控制界面。

可以选择使用按键、旋钮、触摸屏等方式进行控制。

6.电源电路：为了给MP3播放器提供电源，需要设计一个电源电路。

可以选择使用直流电池或者USB供电。

三、软件设计1.系统初始化：在系统启动时，需要进行一系列的初始化操作，包括初始化串口、外部存储器、音频解码芯片等。

2.文件读取：通过串口从外部存储器读取MP3文件，并将其存储到内存中。

3.解码与播放：将MP3文件解码，并通过音频解码芯片输出音频信号。

可以通过SPI接口与音频解码芯片进行通信，控制解码过程和音频输出。

4.控制界面处理：根据用户的操作，通过控制界面进行相应的处理。

例如，用户可以通过按键或旋钮控制音量、切换歌曲等。

5.电源管理：对于电源供应方面，需要设计合适的电源管理模块。

例如，在电池电量过低时，需要提醒用户充电或自动关闭设备。

6.其他功能：根据实际需求，可以添加其他功能。

例如，可以设计一个定时关闭功能，让播放器在一定时间后自动关闭。

四、总结本文介绍了一种基于C51单片机的MP3播放器设计。

基于51单片机音乐播放器设计音乐播放器是一种可以播放音频文件的设备，广泛应用于日常生活中。

本文将基于51单片机设计一个简单的音乐播放器。

一、设计目标本音乐播放器设计的主要目标是实现以下功能：1.支持播放多种格式的音频文件，如MP3、WAV等；2.支持音量调节和音频文件选择功能；3.具备简单的界面和易于理解的操作方式；4.能够适应不同的音频文件大小和音乐时长。

二、硬件设计2. 存储器：选择外接Flash存储器作为音频文件的存放介质，具备较大的存储容量和较高的读写速度，能够满足音频文件的多样性需求。

3.音频解码芯片：选择支持MP3和WAV格式音频解码的芯片，能够将音频文件翻译成能够被音频输出部分播放的信号。

4.音频输出部分：选择合适的音频输出部分，如耳机接口或喇叭接口，将解码后的音频信号输出为声音。

三、软件设计1.系统初始化：在开机时进行系统初始化，包括对主控芯片、存储器和音频解码芯片的初始化。

2.文件系统管理：设计一个简单的文件系统，能够以目录结构的形式管理存储器中的音频文件。

3.音频解码：根据选择的音频文件格式，进行相应的解码操作，将解码后的音频数据传输给音频输出部分。

4.播放控制：实现音量调节和音频文件选择功能，能够暂停、播放、停止等操作。

5.用户界面：设计一个简单直观的用户界面，通过按键或显示屏等方式进行操作反馈和信息显示。

四、系统流程1.开机初始化：对主控芯片、存储器和音频解码芯片进行初始化。

2.文件系统管理：读取存储器中的文件目录，生成文件列表供用户选择。

3.用户操作：用户通过按键或其他方式进行音量调节和音频文件选择操作。

4.音频解码：根据用户选择的音频文件，进行相应的解码操作。

5.播放控制：根据用户的操作，进行音频的暂停、播放、停止等操作。

6.操作反馈：在用户界面上显示操作反馈和信息。

五、总结本文基于51单片机设计了一个简单的音乐播放器，实现了支持多种格式音频文件的播放、音量调节和文件选择功能，并提供了简单的用户界面。

51单片机毕业课程设计音乐播放器本文档旨在提供关于51单片机毕业课程设计的音乐播放器的详细内容。

音乐播放器是一种通过使用51单片机来实现的设备，它可以播放音乐文件并提供一些基本的控制功能。

设计概述功能要求音乐播放器的主要功能要求包括：1. 播放音乐文件：能够读取存储器中的音乐文件，并将其播放出来。

2. 控制功能：提供基本的控制功能，如播放、暂停、下一曲和音量调节等。

3. 显示功能：在显示屏上显示当前播放的音乐信息，如歌曲名、艺术家和播放进度等。

硬件组成音乐播放器的硬件组成包括：1. 51单片机：作为主控芯片，负责控制整个系统。

2. 存储器：用于存放音乐文件。

3. 音频模块：用于将数字音频信号转换为模拟音频信号输出。

4. 控制模块：包括按钮、旋钮等，用于用户控制音乐播放器的操作。

5. 显示屏：用于显示当前播放的音乐信息。

软件实现音乐播放器的软件实现包括以下几个方面：1. 文件系统：实现对存储器中音乐文件的读取和管理。

2. 音频解码：将读取的音乐文件进行解码，并将解码后的音频数据传递给音频模块输出。

3. 用户界面：通过用户界面与用户进行交互，接受用户的控制指令。

4. 显示管理：管理显示屏的内容，实时显示当前播放的音乐信息。

设计步骤1. 硬件搭建：按照硬件组成部分的描述，搭建音乐播放器的硬件平台。

2. 软件编写：实现音乐播放器的软件功能，包括文件系统、音频解码、用户界面和显示管理等。

3. 调试测试：进行软硬件的调试和测试，确保音乐播放器的各项功能正常运行。

4. 完善优化：在实际测试中发现问题，进一步完善和优化音乐播放器的功能和性能。

5. 文档撰写：完成毕业课程设计文档的撰写，详细描述音乐播放器的设计思路、实现过程和测试结果。

总结通过本文档，你可以了解到51单片机毕业课程设计音乐播放器的完整设计内容，包括设计概述、硬件组成、软件实现和设计步骤等方面的内容。

这将帮助你更好地理解音乐播放器的原理和实现方法，为你的毕业课程设计提供一定的参考和指导。

51单片机音乐播放器程序#include //包含51单片机寄存器定义的头文件sbit sound=P3^6; //将sound位定义为P3.6unsigned int C; //储存定时器的定时常数//以下是C调低音的音频宏定义#define l_dao 262 //将"l_dao"宏定义为低音"1"的频率262Hz #define l_re 286 //将"l_re"宏定义为低音"2"的频率286Hz#define l_mi 311 //将"l_mi"宏定义为低音"3"的频率311Hz#define l_fa 349 //将"l_fa"宏定义为低音"4"的频率349Hz#define l_sao 392 //将"l_sao"宏定义为低音"5"的频率392Hz#define l_la 440 //将"l_a"宏定义为低音"6"的频率440Hz#define l_xi 494 //将"l_xi"宏定义为低音"7"的频率494Hz//以下是C调中音的音频宏定义#define dao 523 //将"dao"宏定义为中音"1"的频率523Hz#define re 587 //将"re"宏定义为中音"2"的频率587Hz#define mi 659 //将"mi"宏定义为中音"3"的频率659Hz#define fa 698 //将"fa"宏定义为中音"4"的频率698Hz#define sao 784 //将"sao"宏定义为中音"5"的频率784Hz#define la 880 //将"la"宏定义为中音"6"的频率880Hz#define xi 987 //将"xi"宏定义为中音"7"的频率523H//以下是C调高音的音频宏定义#define h_dao 1046 //将"h_dao"宏定义为高音"1"的频率1046Hz #define h_re 1174 //将"h_re"宏定义为高音"2"的频率1174Hz#define h_mi 1318 //将"h_mi"宏定义为高音"3"的频率1318Hz #define h_fa 1396 //将"h_fa"宏定义为高音"4"的频率1396Hz #define h_sao 1567 //将"h_sao"宏定义为高音"5"的频率1567Hz #define h_la 1760 //将"h_la"宏定义为高音"6"的频率1760Hz#define h_xi 1975 //将"h_xi"宏定义为高音"7"的频率1975Hz /*******************************************函数功能：1个延时单位，延时300ms******************************************/void delay(){unsigned char i,j;for(i=0;i<300;i++)for(j=0;j<300;j++);}/*******************************************函数功能：主函数******************************************/void main(void){unsigned char i,j;//以下是《知足》的一段简谱unsignedint code f[]={ dao,l_xi,dao ,sao,sao,dao,l_xi,dao,mi,dao,l_xi,dao,l_sao,mi,re,l_la,l_xi,dao,re,dao,l_xi,dao,sao,sao,la,xi,la,mi,la,xi,h_dao,sao,mi,mi,fa,mi,l_la,re,dao,dao,l_xi,dao,sao,sao,dao,l_xi,dao,mi,dao,l_xi,dao,l_sao,mi,re,l_la,l_xi,dao,re,dao,l_xi,dao,sao,sao,la,xi,h_dao,sao,la,xi,h_dao,sao,mi,mi,fa,mi,l_sao,re, dao,l_sao,h_dao,xi, la,fa,re, re,l_sao,xi,la,sao,re,dao,dao,re,mi,fa,fa,la,sao,mi,re,mi,fa,fa,sao,dao,h_dao,xi, la,fa,xi,h_dao,h_re, sao,h_re,xi,h_dao,la,xi,h_dao,h_re,sao,0xff}; //以0xff作为音符的结束标志//以下是简谱中每个音符的节拍//"4"对应4个延时单位，"2"对应2个延时单位，"1"对应1个延时单位unsigned char code JP[ ]={2,1,1,2,2,2,1,1,4,2,1,1,2,2,1,1,1,1,4,2,1,1,2,1,1,2,1,1,4,2,1,1,2,1,1,1,1,1,1,4,2,1,1,2,2,2,1,1,4,2,1,1,2,2,1,1,1,1,4,2,1,1,2,2,2,1,1,4,2,1,1,2,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,1,2,1,1,2,1,1,2,1,1,1,1,1,1,2,2,1,1,2,2,1,1,3,1/2,1/2,3,1/2,1/2,3,1,4,};EA=1; //开总中断ET0=1; //定时器T0中断允许TMOD=0x00; // 使用定时器T0的模式1（13位计数器）while(1) //无限循环{i=0; //从第1个音符f[0]开始播放while(f[i]!=0xff) //只要没有读到结束标志就继续播放{C=460830/f[i];TH0=(8192-C)/32; //可证明这是13位计数器TH0高8位的赋初值方法TL0=(8192-C)%32; //可证明这是13位计数器TL0低5位的赋初值方法TR0=1; //启动定时器T0for(j=0;j<="">delay(); //延时1个节拍单位TR0=0; //关闭定时器T0i++; //播放下一个音符}}}/*********************************************************** 函数功能：定时器T0的中断服务子程序，使P3.7引脚输出音频的方波************************************************************/ void Time0(void ) interrupt 1 using 1{sound=!sound; //将P3.7引脚输出电平取反，形成方波TH0=(8192-C)/32; //可证明这是13位计数器TH0高8位的赋初值方法TL0=(8192-C)%32; //可证明这是13位计数器TL0低5位的赋初值方法}。

摘要为方便人们的日常生活，优化学校、机关等单位的计时系统，采用以单片机为基础设计了一种的自动音乐播放器。

本设计利用单片机89C58RD+的定时和计数功能，来完成时间的显示和定时功能。

并且，通过对定时器初值的设定来产生不同频率的声音，利用定时器中断来完成对音乐节拍长度的控制。

通过LM386N1音频功率放大器，将单片机输出的信号放大，再通过喇叭播放乐曲。

通过MAX232型芯片，可以转换PC机上的电压和单片机的电源电压，再通过串口接入PC机，这样就能从PC机上将用C语言编写的程序下载到单片机上。

最后可在数码管上显示时间，当定时时间到后，喇叭自动播放一段连续的音乐。

此设计摆脱了传统闹钟的刺耳声音，取而代之的是美妙的音乐，能为人们的日常生活提供准确的计时，且成本低廉，值得推广。

关键词:单片机；自动音乐播放；音频转换；时间显示；LM386N1音频功率放大器The design of automatic music player based on monolithic integrated circuit AbstractIn order to facilitate people's daily life, optimizes schools’, institutions’ timing system, used has designed one kind of automatic music player which based on monolithic integrated circuit. This design fixed time and counts the function using monolithic integrated circuit 89C58RD+, completes the time the demonstration and fixed time the function. And, Through hypothesis starting value of timer, product the different frequency sound. Severs using the timer completesthe control of music metrelength.Through LM386N1 audio power amplifier, enlarges signal which themonolithic integrated circuit outputs,then broadcast music from loudspeaker. Through MAX232 chip,can transform PC machine on the voltage and the monolithic integrated circuit supply voltage.And then,turns on the computer though String mouth,then it can download procedure which compiles with the C language to monolithic integrated circuit from computer.At last,it can demonstrates the time on the digital tube.When time to after fixed time, the loudspeaker automatically broadcasts section of continual musics. This design get rid of the traditional alarm clock’s grating sound, displaces is the wonderful music,can provides the accurate time for people's daily life.The design cost very inexpensive,it is worth promoting.Key word：Monolithic integrated circuit; Automatic music broadcast; Audio frequency transformation; Time demonstration; LM386N1 audio power amplifier目录论文总页数：页引言................................................................. (1)1 设计任务 (2)2 软件设计2.1 音乐编程原理及流程图 ...............................................2.1.1 声音的产生 ......................................................2.1.2 音频转换原理 ....................................................2.1.3 音频转换流程图 ..............................................2.2 时间显示程序设计..............................................2.2.1 时间显示模块..............................................2.2.2 时钟流程图 ..............................................3 硬件电路的设计 (2)3.1 硬件流程模块（此节作为第1节---后面几节就围绕它来写，并且要写“连贯”）3.2 主要模块电路的设计..........................3.2.1 89C58RD+型单片机介绍.........................................3.2.2 LM386N及外围电路的设计............. ...............3.2.3 串行通信和MAX232芯片........................................... 3.2 4 AT89C52的定时/计数器概述.........................................3.2 5 LED显示原理...............................................4 KEIL仿真软件及Protel 99 SE的应用......................................4.1 KEIL51的应用..........................................................4.2 Protel 99 SE的应用.....................................................4.3 PCB板制作.............................................................5 仿真及调试过程..........................................................5.1 硬件调试过程5.2 软件仿真及调试过程6 结果分析................................................................结论..................................................................... 参考文献....................................................................... 致谢.................................................................. (29)声明.................................................................. (30)附录.................................................................. (16)基于单片机的自动音乐播放器的设计引言单片机，更确切地说应称为作微控制器，是20世纪70年代中期发展起来的一种面向控制的大规模集成电路模块，其特点是功能强、体积小、可靠性高、价格低廉。

本文是应用MCS-51单片机原理和控制理论技术设计音乐发生器的硬件电路，并利用C语言进行软件开发和程序设计。

通过控制单片机内部的定时器产生不同频率的方波，驱动喇叭发出不同音调的音乐，再利用延迟控制发音时间的长短。

把乐谱转化成相应的定时常数，从而达到从发音设备中演奏出悦耳动听的音乐的效果。

该音乐盒主要由按键电路、复位电路、时钟电路以及蜂鸣器组成。

使用两个按键控制音乐盒，一个用来切换歌曲，另一个用来切换8路LED的变化花样，本音乐盒共有两首歌曲，花样灯花样共计3种。

播放歌曲时，蜂鸣器发出某个音调，与之对应的LED亮起。

本设计利用KEIL编程软件对音乐盒源程序进行编程并调试，配合PROTEUS仿真软件对硬件进行仿真调试，节约了设计时间。

本系统采用C语言进行软件设计。

正文中首先简单描述系统硬件工作原理，且附以系统硬件设计框图，论述了本次毕业设计所应用的各硬件接口技术和各个接口模块的功能及工作过程。

其次阐述了程序的流程和实现过程。

本文撰写的主导思想是软、硬件相结合，以硬件为基础，来进行各功能模块的编写。

关键词单片机；音乐；C语言；STC89C51；KEIL；PROTEUSAbstractIn this paper, The music generator and its hardware circuit is designed by MCS-51 single-chip microcomputer principle and control theory, and the Software development and programming are based on C language programming. According to control the MCU internal timer to produce different frequency Square wave to drive the horn sounds of different tones of music, then use the delay to control the length of time. The music Transformationed into the timing constants corresponding so that the sound equipment can play Melodious music.The music box is mainly composed of keypad circuit, reset circuit, clock circuit and a buzzer. Two buttons are used to control the music box, one to switch songs, another is used to switch the 8 LED pattern, the music box has two songs, a total of 3 kinds of pattern light pattern. While the music is playing, the buzzer sounded a tone, and the corresponding LED lights up. The design of programming the music box and debug source code using KEIL programming software, and to save the design time the PROTEUS simulation software is used to simulate the hardware debugging.The system uses C language for software design. Firstly, in the text describes the working principle of the system hardware, and attached to the system block diagram of hardware design to discusse the function andworking process of the graduation design and the application of the hardware interface technology and the interface module. Secondly, expound the procedures and processes to achieve process. The main idea of this writing is a combination of software and hardware, on the base of hardware, write to each function module.Key wordsSinglechip; music; C language; STC89C51; KEIL; PROTEUS目录前言.................................. 错误!未定义书签。