基于51单片机的MP3播放器设计毕业论文.doc

目　录 前　言 1 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 随着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MP3，AT89C51SND1C，USB，FATMP3 PLAYER DESIGN BASED ON 51 SINGLE-CHIP ABSTRACT Along 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 computers 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。随着嵌入式技术的深入发展和广泛应用，社会对掌握嵌入式技术的人才产生巨