基于MP3播放器的设计毕业论文.docx

毕 业 论 文 论文题目 基于MP3播放器的设计 摘要 随着电子技术的发展， MP3 播放器已是目前市场上最流行的消费类数码产品之一， 因其具有大容量、高音质、小巧便携等特点而倍受广大消费者的青睐。而对于单片机编 写的MP3 播放器具有执行效率高、频率输出稳定、易于修改、高可靠性、高性价比、低 电压、低功耗等优点，使单片机近几年得到迅猛发展和大范围推广，广泛应用于工业控制 系统、数据采集系统、智能化仪器仪表及通讯设备、日常消费类产品、玩具等领域。 本设计主要利用ATmegal28 作为系统的中央处理器，采用VS1003B 解码芯片作为音 乐播放器的解码芯片， SD 卡作为系统的存储器， CH375 芯片作为读取外部U 盘数据的驱 动芯片。通过 ATmegal28 读取 SD 卡或者读取经 CH375 芯片传送的音频数据，再送入 VS1003B 解码芯片实现特定格式的音频解码，并通过耳机或者有源音响输出。 关键词： Atmega128;MP3 播放器； SD 卡； CH375; VS1003B; Based on the design of ATmegal28 music player Abstract With the development of electronic technology, MP3 players on the market today is one of the most popular consumer digital products, because of its large capacity, high-quality, compact and portable features and much in favor of consumers. For the preparation of single-chip MP3 player with high efficiency, stable frequency output, easy to modify, high reliability, high cost, low voltage, low power consumption, etc., so that the microcontroller in recent years has been the rapid development and large-scale promotion, widely used in industrial control systems, data acquisition systems, intelligent instrumentation and communications equipment, everyday consumer products, toys, and other fields. The main advantage of this design ATmegal28 as the central processor system, using VS1003B decoder chip as the music player decoder chip, SD card as a memory system, CH375 chip as U disk read external data driver chip. ATmegal28 SD card or by reading through the CH375 chip reads audio data transmission, and then into VS1003B audio decoder chip decode a specific format, and through headphones or powered stereo output. Keywords: Atmegal28; MP3 player; SD card; CH375; VS1003B; 目录 第一章 引 言 1 1.1 课题背景与来源 1 1.2 课题意义 1 1.3 MP3播放器发展历程和研究现状 1 第二章 系统概述 3 2.1 系统设计总方案选择 3 2.2 系统可行设计方案对比选择 3 2.3 系统设计硬件组成 4 2.4 系统设计的功能介绍及操作说明 5 第三章 硬件组成及设计 6 3.1 主控系统模块设计电路图 6 3.2 VS1003音频解码模块 8 3.3 SD卡模块电路及非正常