基于ARM的音乐播放器的设计与实现

本科生毕业设计（论文）I摘要多媒体技术融计算机、声音、文本、图像、动画、视频和通信等多种功能于一体，是当今信息技术领域发展最快、最活跃的技术，是新一代电子技术发展和竞争的焦点。嵌入式设备与多媒体技术的融合使得PDA，智能手机，平板等智能终端得到快速发展。未来，智能终端与物联网的结合将推动嵌入式设备快速发展。所以，基于嵌入式终端的应用前景广阔。设计目的是在嵌入式平台上开发一款基于开源Linux操作系统的多媒体播放器，它以mplayer作为核心播放程序，将支持更多的文件播放格式甚至可以与PC机上的媒体播放器相媲美。多媒体播放器的硬件部分：以S3C2440开发板为硬件平台，它的外围设备可以外插U盘作为存储器、TFT-LCD触屏、key23键盘，以及外接耳机作音频设备。因为播放器开发是基于成熟的硬件平台，主要工作集中在软件部分，主要包括：搭建开发环境，配置编译mplayer可执行程序，编写触屏驱动，及key23驱动，编写主控程序等等，最后将程序移植安装到开发板，完成基于Linux的嵌入式播放器的设计。经过测试，播放器符合设计要求。关键词：触屏，移植，线程，嵌入式本科生毕业设计（论文）IIAbstractThemultimediatechnologyinvolvessound,text,image,animation,videoandcommunicationsandotherfunctions.Informationtechnologyisoneoffastestgrowingtechnologies.Obviously,itisanewgenerationofelectronictechnologydevelopmentandthefocusofcompetition.TheintegrationofembeddedequipmentandmultimediatechnologycontributesarapiddevelopmentforPDA,smartphones,slabintelligentterminal.Inthefuture,intelligentterminalwillpromotethenetworkembeddedequipmentrapiddevelopment.So,theapplicationthatbasedonembeddedterminalhasabrightfuture.ThepurposeofthisdesignistodesignmultimediaplayeronanembeddedplatformbyusingtheopensourceinLinuxoperatingsystem.Itistakemplayerascorebroadcastprogram,whichwillsupportmorefileformat,andevenismorecomparablewiththePCmediaplayers.ThehardwarepartofMultimediaplayertakesS3C2440developmentboardforthehardwareplatform,whichusetheUSBdisk,tft-lcdtouchscreen,key23keyboard,andexternalearphoneforaudioequipment.Becausetheplayerdevelopmentisbasedonmaturehardwareplatform,themainworkfocusedonsoftwarepart,whichmainincludestheseworks,suchasthedevelopmentenvironmentsetup,thecompiledconfigurationofmplayer,thedriveoftouchscreenandkey23,andtheprogramofmastercontrol,etc.Finally,thedevelopedprogramcanbeinstalledtodevelopmentboardbasedontheLinux.Aftertesting,playercanmeetthedesignrequirements.Keywords:touchscreen;transplant;thread;embedded;本科生毕业设计（论文）III目录第1章绪论............................................................................................................11.1选题背景...................................................................................................11.2研究意义...................................................................................................2第2章需求分析与方案制定................................................................................42.1功能性分析...............................................................................................42.2可行性分析...............................................................................................42.3设计的主要目标任务...............................................................................52.4系统方案制定...........................................................................................52.5本章小结...................................................................................................5第3章系统功能模块介绍....................................................................................63.1S3C2440开发板简介.................................................................................63.2S3C2440芯片特性简介.............................................................................63.2.1S3C2440芯片参数..........................................................................73.2.2内核结构........................................................................................73.2.3总线结构........................................................................................73.2.4处理器通用模块1.........................................................................83.2.5处理器通用模块2.........................................................................83.2.6存储器接口....................................................................................93.2.7外围总线接口................................................................................93.2.8人机接口........................................................................................93.3LCD模块介绍...........................................................................................93.4软件模块介绍.........................................................................................103.5本章小结.................................................................................................11第4章硬件系统..................................................................................................124.1开发板系统的硬件框架.........................................................................124.2LCD模块原理.........................................................................................124.2.1A/D转换器....................................................................................124.2.2触摸屏原理结构..........................................................................134.3系统硬件介绍.........................................................................................14本科生毕业设计（论文）IV4.4各个外设接口.........................................................................................144.4.1JTAG接口.....................................................................................144.4.2USB_UART转换接口................................................................