基于嵌入式Linux的MP播放器的设计与实现毕业设计论文.doc

Design and Implementation for a MP3 Player Based on Embeded Linux A Dissertation Submitted to Nanjing Institute of Technology For the Academic Degree of Bachelor of Science By Supervised by Lecturer KangNi College Nanjing Institute of Technology Jun 2013 摘 要 伴随嵌入式系统的持续发展以及普通用户对多媒体应用越来越旺盛的需求,具有多媒体播放功能设备逐渐成为嵌入式系统中必不可少的重要功能。此毕业设计将设计一个基于嵌入式Linux的MP3播放器，系统硬件采用基于ARM架构的开发板。 论文首先介绍了嵌入式操作系统的必威体育精装版发展、嵌入式Linux、ARM的特点以及Qt等的相关知识。重点介绍了如何使用开源播放器MPlayer、解码库libmad、Qt Creator工具来开发一个有图形界面的MP3播放器。还介绍了如何移植U-boot、Linux内核、Qt和文件系统，并在移植好之后烧写到开发板之上，得到一个能独立运行在开发板上的MP3播放器。 系统测试表明，该MP3播放器能实现如下功能：“播放”、“暂停”、“停止”、“音量调节”、“退出程序”和“歌曲播放时间”，系统运行稳定，基本达到了设计要求。 关键词：嵌入式Linux；移植；Linux ；Qt Abstract Along with the sustainable development of the embedded system and the increasingly demands for multimedia applications, an electronic equipment has a functions of playing songs gradually become indispensably.This design will introduce an implemention for a MP3 player, based on embedded Linux system and an ARM architecture development board. This Paper introduces the latest development for embedded operating system, embedded Linux, the characteristics of the ARM, Qt and other related knowledges.Especially,this paper displays how to use the open source player MPlayer, a decoding library called libmad, Qt Creator tools to develop a graphical interface of an MP3 player.In this paper, the work of transplant the boot, the Linux kernel, Qt, and file systems is also introduced. After all system images are burned into the development board, one development board can run a MP3 player is obtained. System test shows that this MP3 player can realize the following function: Play, Pause ,Stop, Volume Control, Exit and Show Songs Playing State.The whloe system runs stably, and reached the basic design requirement. Keywords： embeded Linux；transplant；Linux；Qt 目 录 第一章 绪 论 1 1.1 课题研究背景和意义 1 1.2 嵌入式系统发展和现状 2 1.2.1 嵌入式操作系统 2 1.2.2 嵌入式Linux和Linux 3 1.2.3 ARM的介绍 3 1.2.4 Qt的介绍 4 1.3 论文所做的工作和结构 5 1.3.1 论文所做的工作 5 1.3.2 论文