隨著科技的進步，消費性電子產品之功能需求日趨多樣化，對於系統平台的要求也日益增高，開發者通常必須根據產品的硬體特性使用專屬的發展平台，建立一個適合的軟體發展環境。嵌入式多媒體應用產品已成為消費性電子產品一大主流，建立一適合發展多種多媒體資料處理與應用產品的系統平台，將可縮短產品研發週期，提升產業之生產力。
本論文研究嵌入式系統平台之建立，並以TMS320DSC25為硬體平台實作一多媒體資訊家電系統平台。TMS320DSC25是德州儀器公司(Texas Instrument)在數位相機產品中的一套解決方案，具有ARM7TDMI處理器與C5409數位信號處理器(DSP)的主從式(Master-Slave)多處理器架構—以ARM7TDMI CPU控制整體系統周邊與DSP之運作，以C5409處理多媒體影音資料。我們根據硬體平台配置之周邊裝置，設計控制Key switch、OSD(On-Screen Display)、AIC23、UART等輸出與輸入裝置之驅動程式，移植即時系統µC/OS-II作為軟體架構之系統核心，並且根據系統的號誌功能(Semaphore)作硬體周邊之資源管理。在網路功能方面，我們移植X-modem傳輸協定傳輸資料並移植lwIP(light weight Internet Protocol)架構網路函式庫提供點對點ICMP與UDP/IP的資料傳輸功能。此一平台具備基本的任務管理、任務排程、時間管理、記憶體管理等功能。
本論文並針對所建立的系統平台設計一MP3格式音樂播放器及其所需之使用者介面以展示任務溝通、資源管理、周邊裝置輸出與輸入等功能之整合。此MP3應用程式可配合歌曲播放功能以字幕顯示其歌詞，達到類似坊間KTV設備之效果。

This thesis presents a study of constructing an embedded system platform, and uses TMS320DSC25 as the example underlying hardware to implement a multimedia information appliance system platform. TMS320DSC25 is a Texas Instrument's solution for digital still camera which includes an ARM7TDMI CPU and a C5409 digital signal processor(DSP) organized as a master-slave multiprocessor architecture—the ARM7TDMI CPU is used to control the peripherals and the operation of C5409, while the C5409 is used to deal with multimedia signal data. We port µC/OS-II, a real-time kernel, as the system kernel of the software architecture, and employ the semaphore to realize the management of system resources. We develop device drivers to control I/O devices including Key switch, OSD, AIC23, UART. We also port X-modem protocol to transfer data and port lwIP(light weight Internet Protocol) network library to provide the point-to-point ICMP and the UDP/IP data transfer function. This platform has the capabilities of task management, schedule management, time management, and memory management.
In order to demonstrate and test the functionality of task communication, resource management, and I/O peripherals of this system platform, we design and implement an MP3 music player with basic GUI. This MP3 application can play songs with the lyric synchronously displayed, which is similar to the popular KTV equipment in the market of consumer electronic products.

第一章 緒論.............................................................1
1.1 背景.........................................................1
1.2 研究動機.....................................................1
1.3 章節提要.....................................................2
第二章 相關研究......................................................3
2.1 嵌入式系統平台發展...........................................3
2.2 嵌入式系統軟硬體共同設計.....................................4
2.3 嵌入式多處理器系統...........................................4
第三章 系統架構......................................................6
3.1 硬體架構................................................6
3.2 軟體架構...............................................10
3.2.1 系統核心...............................................10
3.2.1.1 任務處理.........................................11
3.2.1.2 任務溝通.........................................13
3.2.1.3 時間管理.........................................15
3.2.1.4 記憶體管理.......................................15
3.2.2 驅動程式...........................................15
3.2.2.1 按鍵元件.........................................16
3.2.2.2 螢幕顯示元件.....................................17
3.2.2.3 UART介面.....................................20
3.2.2.4 AIC23元件.....................................21
3.2.3 Compact Flash檔案系統...........................21
3.3 ARM與DSP之溝通機制................................22
3.4 網路功能...............................................26
3.4.1 網路晶片.........................................26
3.4.2 網路架構.........................................27
第四章 系統實作....................................................29
4.1 µC/OS-II之移植...................................29
4.2 系統主程式流程.......................................30
4.3 應用程式開發流程....................................31
4.4 系統資源管理實作與測試..............................32
4.5 X-modem資料傳輸功能移植與測試....................36
4.6 lwIP函式庫移植...................................39
4.6.1 ICMP封包傳輸功能測試.........................40
4.6.2 UDP/IP封包傳輸功能測試........................40
第五章 系統功能整合測試..............................................42
5.1 測試程式架構.............................................42
5.2 畫面輸出.................................................44
5.2.1 中文字型顯示功能................................44
5.2.2 MP3應用程式圖形介面.........................45
5.3 MP3播放器............................................46
5.3.1 在MP3播放器內處理器間之溝通機制..............46
5.3.2 MP3檔案格式................................47
5.3.3 MP3應用程式之任務溝通機制...................49
5.4 測試結果...........................................51
第六章 總結與後續研究.........................................53
6.1 總結..................................................53
6.2 後續研究...............................................53
參考文獻...............................................................54

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