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1、基于硬件构件的嵌入式底层软件开发方法研究及其应用 摘 要 - I - 摘 要 面向对象方法和软件构件技术已经广泛应用到传统软件开发中，大大提高软件的开发效率、增强软件的重用性和移植性，而在嵌入式领域这种开发技术还微乎其微。但随着嵌入式系统规模和复杂性的日趋增大，传统的嵌入式开发方式难以解决面临的新问题，为此人们加大了对嵌入式开发方法的研究力度。由于嵌入式系统是一个软硬件紧密结合的系统，所有嵌入式软件的执行都离不开特定的硬件体系，因此，研究硬件模块及底层软件构件化的嵌入式开发方式对增强它们的重用性与移植性具有重要意义。 本文从对现有通用软件开发方法的分析中获得启示，探讨面向嵌入式硬件模块及底层软
2、件的开发方法的具体实现过程。文中提出的硬件构件和底层构件技术，借用面向对象方法和构件化技术中的封装方式、可重用与可移植等特点，实现硬件模块及底层软件在同一系统或不同系统中的重用与移植。本文给出硬件构件和基于硬件构件的底层构件的定义和概念模型，详细阐述它们的实现和应用过程，在此基础上提出基于硬件构件的嵌入式硬件电路图的设计原则及注意事项、底层构件化的嵌入式底层软件开发框架及实例说明。 上述研究成果对丰富嵌入式开发方式具有重要的理论意义和实际应用价值。文中提出的两种构件技术能有效的提高嵌入式系统的开发效率，增强系统的可靠性与稳定性。本文将这两种构件开发技术应用到恒温恒湿控制器系统(CTHCS)的设
3、计与实现中，为嵌入式硬件系统及底层软件的开发提供新的方法。 关键词：关键词：嵌入式系统，硬件构件，底层构件，底层软件，构件重用，构件移植 作者：荐红梅 指导老师：王宜怀 Research and Application of Development Method for Embedded Underlying Software based on Hardware- Component - II - Abstract Object- Oriented methodology and Software Components technology have been widely used into
4、 traditional software development, which have improved software development efficiency and enhanced software reusability and transplantation. But for embedded systems, it is extremely lacked of these kinds of development methods. However, with the increasing size and complexity of embedded systems,
5、the new problems can not be solved by traditional software development methods easily, so people has to increase the intensity of the study on embedded system development methods. As embedded system is a closely integrated hardware and software system and all embedded software should run on special
6、hardware architecture, it is useful to study on the embedded development methods of component- based hardware module and underlying software, to enhance the reusability and transplantation. In this paper report, author first analyzes the exiting general software development methods and discusses the
7、 realization process of embedded hardware module and underlying software- oriented method. Then, the hardware component and underlying component technologies have been proposed, which use some features of Object- Oriented methodology and Software Component technology, such as package, reusability an
8、d transplantation. The definition and concept model of hardware component and underlying component are given in this paper, followed by their implementation and application process. On this basis, some principles are proposed, which are embedded hardware circuit design principles and notes based on
9、hardware component, embedded software development framework and examples based on software component. Those above study results have important theoretical and practical value, for the enrichment of embedded development methods. These component technologies proposed in this paper, can improve the eff
10、iciency of embedded systems development and enhance system reliability and stability. The two technologies are applied to the design and implement of constant temperature and humidity controller system (CTHCS), which provide a new method for the development of embedded hardware system and underlying
11、 software. Key Words: Embedded System; Hardware Component; Underlying Component; Underlying Software; Component Reusability; Component Transplantation Written by Jian Hongmei Supervised by Wang Yihuai 目 录 摘 要- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
12、- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - I Abstract- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - II 第一章 绪 论 - - - -
13、 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 1.1 课题背景- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14、 - - - - - - - - 1 1.1.1 嵌入式系统及其发展历程 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 1.1.2 嵌入式系统的构成及其特点- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 1.2 嵌入式系统开发遇到的难点- - - - - - - - - - - - - - - - - - - - -
15、 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 1.3 嵌入式系统开发方法的现状及其启示- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 1.4 本文的课题意义及主要工作- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 1.4.1
16、 本文的课题意义 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 1.4.2 本文的主要工作 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 1.5 论文结构- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
