【摘要】：移動互聯(lián)網(wǎng)的飛速發(fā)展改變了人們的生活方式使得人類進(jìn)跨入一個(gè)全新的信息時(shí)代。作為這個(gè)時(shí)代的主題，圖片、文字、音頻、視頻、數(shù)據(jù)等多媒體通信相結(jié)合，極大豐富了人們的生活體驗(yàn)。嵌入式多媒體終端設(shè)備作為直接于用戶交互的載體，是多媒體系統(tǒng)中的重要組成部分，其處理能力強(qiáng)、體積小、使用方便，近些年來已經(jīng)成為多媒體領(lǐng)域的研究的主流。多媒體終端是一種能綜合各種不同媒體可以集影音、娛樂、通話、辦公和計(jì)算等應(yīng)用一體的新型通信終端。從系統(tǒng)的角度出發(fā)，多媒體終端產(chǎn)品的開發(fā)主要涉及媒體處理技術(shù)、存儲技術(shù)、通信技術(shù)和顯示技術(shù)。 在分析了現(xiàn)在市面上主流的多媒體數(shù)字終端設(shè)備和嵌入式技術(shù)的基礎(chǔ)上，設(shè)計(jì)出了一種嵌入式多媒體終端，提出了多媒體終端設(shè)備的具體軟、硬件體系結(jié)構(gòu)。選擇以ARM9為核心的三星S3C2440A微處理器作為系統(tǒng)的主控芯片。在主控芯片的基礎(chǔ)上，分析當(dāng)前嵌入式多媒體終端設(shè)備的主要功能需求，設(shè)計(jì)了系統(tǒng)硬件的總體架構(gòu)，進(jìn)行了外圍芯片的選型，設(shè)計(jì)了系統(tǒng)終端整體硬件的解決方案，對S3C2440A處理器的芯片引腳資源進(jìn)行了具體的分配，詳細(xì)設(shè)計(jì)了主控芯片最小系統(tǒng)電路以及外圍的存儲器、液晶顯示模塊、觸摸屏模塊、SDRAM芯片、音頻解碼芯片和網(wǎng)卡芯片的連接的電路。 在所搭建硬件平臺的基礎(chǔ)上進(jìn)行了嵌入式Linux操作系統(tǒng)的移植，，闡述了將嵌入式Linux系統(tǒng)移植到本系統(tǒng)的具體方法，分析了混合文件系統(tǒng)的構(gòu)建，并給出了BootLoader移植、Linux內(nèi)核移植和文件系統(tǒng)移植具體的實(shí)現(xiàn)方法。 在所移植的嵌入式Linux操作系統(tǒng)的基礎(chǔ)上進(jìn)行外圍芯片驅(qū)動的開發(fā)，闡述了嵌入式Linux驅(qū)動開發(fā)的一般流程方法。具體給出了存儲器NAND Flash、LCD、觸摸屏模塊、SDRAM、音頻芯片和網(wǎng)卡芯片等外圍芯片驅(qū)動的開發(fā)設(shè)計(jì)。
[Abstract]:The rapid development of mobile Internet has changed people's way of life. As the theme of this era, pictures, text, audio, video, data and other multimedia communication, greatly enriched people's life experience. As the carrier of user interaction, embedded multimedia terminal equipment is an important part of multimedia system. It has strong processing ability, small size and easy to use. In recent years, it has become the mainstream of multimedia research. Multimedia terminal is a new kind of communication terminal which can integrate various media, such as audio, video, entertainment, communication, office and computing. From the system point of view, multimedia terminal product development mainly involves media processing technology, storage technology, communication technology and display technology. Based on the analysis of the mainstream multimedia digital terminal equipment and embedded technology in the market, an embedded multimedia terminal is designed, and the hardware and software architecture of the multimedia terminal equipment is presented. The Samsung S3C2440A microprocessor with ARM9 as the core is chosen as the main control chip of the system. On the basis of the master control chip, the main functional requirements of the embedded multimedia terminal equipment are analyzed, the overall architecture of the system hardware is designed, the selection of the peripheral chip is carried out, and the solution of the whole hardware of the system terminal is designed. The chip pin resources of S3C2440A processor are allocated, and the minimum system circuit of main control chip and peripheral memory, liquid crystal display module and touch screen module are designed in detail. Audio decoder chip and network card chip connection circuit. On the basis of the hardware platform, the embedded Linux operating system is transplanted, the method of transplanting the embedded Linux system to this system is expounded, and the construction of the mixed file system is analyzed. The implementation methods of porting BootLoader kernel and file system are also given. Based on the transplanted embedded Linux operating system, the peripheral chip driver is developed, and the general flow chart of embedded Linux driver development is described. The development and design of peripheral chips such as memory NAND Flash,LCD, touch screen module SDRAM, audio chip and network card chip are presented.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP368.1

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