基于SD卡的MP3播放器設(shè)計(jì)
19325字 28頁


摘要
隨著電子產(chǎn)業(yè)的迅速發(fā)展，各種袖珍型消費(fèi)類電子產(chǎn)品應(yīng)運(yùn)而生，MP3便是其中的一員。但是，自從2005年以后，MP3的銷售開始有所下降。對于開發(fā)一種成本、耗能更低，性能更高的MP3播放器取代現(xiàn)有產(chǎn)品，改善銷售下降的趨勢已變得刻不容緩。
本次設(shè)計(jì)主要針對市場上MP3的容量及播放格式有限等問題加以設(shè)計(jì)，可方便進(jìn)行SD或MMC卡等微型存儲器的容量擴(kuò)展，并且播放MP3、WMA、WAV、MIDI等格式文件。使用者只需要將MP3等格式文件放到存儲卡中，便可以播放這些音樂。本設(shè)計(jì)支持重低音、環(huán)繞音音效。本設(shè)計(jì)可以作為車載音響，也可以用于家用播放、辦公場合或便攜設(shè)備等。
本論文首先針對基于SD卡的MP3的播放器整體設(shè)計(jì)加以研究和介紹，并討論系統(tǒng)軟硬件的選擇，及具體開發(fā)調(diào)試環(huán)境；然后，深入介紹了系統(tǒng)設(shè)計(jì)方案及其實(shí)現(xiàn)，并著重研究了SD卡、FAT格式、解碼芯片及其軟件驅(qū)動的設(shè)計(jì)；最后，詳細(xì)介紹了性能優(yōu)化等方面的工作及其開發(fā)前景。本設(shè)計(jì)在Atmel公司生產(chǎn)的atmega32單片機(jī)上實(shí)現(xiàn)并取得了較好的效果。



關(guān)鍵詞：MP3播放器，AVR單片機(jī)， SD卡，音頻解碼，F(xiàn)AT分析


The Designed Of Mp3 Plyer Based On SD Card
ABSTRACT
With the rapid development of electronics industry, various mini consumer electronics products have emerged, MP3 is one of them. However, since after 2005, MP3's sales began to decline. For the development of a cost, lower power consumption, higher performance MP3 player to replace the existing products, improve sales decline has become imperative.
The article is mainly aimed at the mp3's capacity on the market and play format limited and so on to be designed to facilitate micro-SD or MMC memory cards, the capacity expansion, and play MP3, WMA, WAV, MIDI and other files. Users only need to put MP3 and other format files into the memory card, will be able to play the music. This design supports heavy bass, surround sound audio. This design not only can be used as car audio, but also can be used for home playing, office occasions, or in portable equipment.
In this paper, first of all for the SD card-based MP3 player to study the overall design and presentation, and discuss the system hardware and software choices, and specific developing and debugging environment; and then insight into the system design and its implementation, focusing on the SD card, FAT format, decoder chip and software-driven design; Finally, the detailed performance optimization aspects of the work and its development prospects. This design produced by the Atmel’s microcontroller atmega32 to achieve and has achieved good results.



KEY WORDS:MP3 Player, AVR Micro Chip Unit, SD Card, Audio Decorde, FAT ansysly


第一章 緒論。。。。。。。。。。。。。。。。5
1.1 基于SD卡的MP3概述
1.2 課題研究的背景及意義
1.3 論文研究的內(nèi)容和目標(biāo)
第二章 硬件設(shè)計(jì)。。。。。。。。。。。。。。9
第三章 軟件設(shè)計(jì)。。。。。。。。。。。。。。17
第四章 總結(jié)。。。。。。。。。。。。。。。。25
參考文獻(xiàn)


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