用VS1003 DIY MP3播放器(支持SD卡,TF卡,U盘) 原创制作

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中文摘要………………………………………………………………………………………Ⅰ 英文摘要………………………………………………………………………………Ⅱ 1. 引言........................................................................................................................................1 2. 课题研究背景...................................................................................................................2

2.1国内外的研究现状......................................................................................................2 2.2 课题研究的意义.........................................................................................................3

3. 课题研究内容...................................................................................................................4

3.1研究主要内容...............................................................................................................4 3.2主要方案选择...............................................................................................................4

4. 主要器件的原理及应用.............................................................................................5

4.1主控制器MCU................................................................................................................5

4.1.1 ATmega32L性能..............................................................................................5 4.1.2 引脚说明...........................................................................................................6 4.1.3 AVR CPU 内核.................................................................................................8 4.1.4 SPI 串行外设接口......................................................................................10 4.1.5 C语言初始化程序和SPI传输程序........................................................13 4.2 USB 总线接口芯片CH375......................................................................................14

4.2.1 概述..................................................................................................................14 4.2.2 特点..................................................................................................................14 4.2.3 接口说明.........................................................................................................15 4.2.4 主机模式下的使用方法.............................................................................18 4.2.5 初始化U盘C语言程序.............................................................................19 4.3 音频解码芯片VS1003.............................................................................................20

4.3.1 VS1003 特性..................................................................................................20

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4.3.2 VS1003概述...................................................................................................21 4.3.3 VS1003通信模式..........................................................................................22 4.3.4 VS1003 C语言初始化程序........................................................................24

5. 整体方案的实现...........................................................................................................26

5.1方案结构框图.............................................................................................................26 5.2 设计流程图................................................................................................................28 5.3 软件实现方法............................................................................................................29 5.4 系统电路原理图.......................................................................................................31 5.5 解码板电路图............................................................................................................33

6. 结束语...........................................................................................................................34 致谢........................................................................................................错误！未定义书签。参考文献...................................................................................................................................35 附录........................................................................................................错误！未定义书签。

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车载数字音源的设计

摘要

本设计部分采用苹果公司最初IPOD设计的方案，以美国ATMEL 公司的AVR芯片作为主控制器，芬兰VLSI公司的VS1003作为音频解码芯片，南京沁恒公司的CH375作为USB设备接口芯片，以优盘、SD /TF卡作为媒体存储介质，NOKIA（诺基亚）3510i手机的4096色彩屏作为显示屏，来完成音乐播放器的功能。该设计具有五按键操作界面，界面显示友好，支持MP3、WMA、WAV和MID四种音乐格式，同时支持文件夹和音乐文件的中文显示。该系统支持FAT16和FAT32文件系统，支持大容量SD/TF卡和优盘，支持高保真立体声耳机输出。经过实际测试，和现有的汽车音响系统相比：该设计性能稳定，功耗较低，声音亮丽，低音淳厚，支持优盘、SD /TF卡的读写，给汽车音响的设计带来新的思路，给驾驶者提供全新的音乐体验。

关键词 ATmega32L/VS1003/CH375

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The design of the Car Digital Audio

ABSTRACT

The design uses the ATmega32L of AVR Series produced by the American ATMEL company as Master and uses the VS1003 produced by Finnish VLSI company as Audio decoder chip, uses CH375 produced by Nanjing Heng Qin company as Interface chip of USB devices, uses SD / TF cards as the storage medium-media, uses the 4096 color display screen of NOKIA (Nokia) 3510

Mobile phone as display screen To complete the car digital music player functions.

It has 5 Keyboards operation interface, Friendly interface, supports folders and files to show the Chinese，chooses to play music file in any document,supports MP3、WMA、Wav MID the 4 Music format.it Supports FAT16 and FAT32 file system and doesn’t have Restrictions on capacity of The SD / TF cards and USB.it Supports exports of hi-fi stereo headphones and has good sound quality,at the same time it can provide 1.5 W power larger output. it uses low-power chips and has optimization on software,so It has Lower power consumption.

KEY WORDS ATmega32L，VS1003，CH375

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III

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