嵌入式软件调试方法研究

在嵌入式软件开发过程中,由于开发者的经验和技术的限制,开发的软件经常会出现很多错误。因此,调试在软件开发流程中成为一个比较重要的环节。文章以Vxworks为例,给出了调试软件的有关方法。     

一个嵌入式软件系统开发调试环境的建立

由于嵌入式软件系统往往需要固化在ＥＰＲＯＭ中，其运行平台（目标机）缺少甚至没有对软件进行调试的工具，因此，对于嵌入式软件系统的开发和调试而言，其工程复杂程度要比在通用ＰＣ机上开发调试一个系统软件大的多，本文通过一个作战应用软件系统开发调试的实例，来介绍一种建立嵌入式软件系统开发调试环境的方法。     

一种嵌入式软件离线重放调试方法

在嵌入式多核操作系统中,软件的运行环境十分复杂,在软件开发过程中往往会遇到某些错误现场不稳定复现的情况,为嵌入式软件的调试带来困难。针对上述问题,向开发人员提供软件调试过程的现场重放能力,对嵌入式软件的调试过程进行真实记录（包括：调用栈、内存、变量、寄存器等调试现场信息）,生成并通过离线解析日志文件以支持开发人员对调试现场的确定性复现和分析,为嵌入式软件的调试提供了有效途径。     

嵌入式系统的界面调试H模型方法

嵌入式软件实现过程中的设备、开发工具、操作系统等因素的多样化,使得系统调试工作较为复杂困难。针对嵌入式软件开发过程中的屏幕自适应问题,提出了H界面调试模型。该模型首先将界面构建分成了基于控件和基于绘图两种方式,而后基于不同的界面构建方式提出了对应的调试策略、过程以及技术等。通过两个基于Qt和Android开发环境下的系统界面开发示例,具体描述了H界面调试模型的应用过程,同时证明了该界面调试模型的灵活性和有效性。     

嵌入式系统源码调试器GDB的远程通信

嵌入式软件调试环境GDB为嵌入式软件的开发提供了一个友好的软件调试平台。本文介绍了GDB的基本结构、其作为调试器远程调试的基本功能，重点介绍了远程调试的通信协议。     

嵌入式调试中的数据获取和错误定位

嵌入式软件系统因其软件相关性和硬件相关性而比常规软件的调试复杂很多,特别是在数据获取和故障定位方面最为突出。从嵌入式软件开发与常规软件开发的异同着手,以该行业实践积累为基础,列出并讨论了一些行之有效的数据获取及错误定位方法,希望能为该领域开发人员提供一点帮助。     

嵌入式软件集成开发环境关键技术研究

通过对Eclipse插件CDT的编译构建系统模型的研究,提出一种基于该模型的编译工具链的集成和自动编译技术,并针对航天器控制软件的特点,结合CDT调试系统,为航天器控制软件的开发提供一个集成化的调试环境.从嵌入式交叉编译和远程调试两个技术层面介绍了一个基于开放Eclipse平台的嵌入式软件集成开发环境.     

面向RTEMS的嵌入式软件集成开发环境

实现面向RTEMS的嵌入式软件集成开发环境,提高嵌入式应用程序的可靠性和开发效率。在编译过程中添加缓冲区溢出动态检测模块,从而在程序运行过程中检测到缓冲区溢出,提高了程序可靠性。利用插桩技术实现远程调试环境,结合能对RTEMS进行定制的集成开发环境,提高了嵌入式应用程序的开发和调试效率,缩短了开发周期。     

嵌入式远程调试工具的研究与实现

在嵌入式软件开发中,调试是一个重要的环节,调试工具是衡量软件开发环境优劣的重要因素.本文对插桩方式的嵌入式远程调试工具进行了分析与研究,采用GNU gdb远程串口通信协议,通过软件接管目标系统的全部异常实现对目标程序的调试与跟踪,实现读/写内存与寄存器、设置断点、单步执行和继续执行功能,并应用于基于ARM的RTEMS嵌入式实时操作系统与应用程序的调试中.     

跨平台嵌入式任务级调试代理的研究与实现

在嵌入式系统中任务级调试占了很重要的位置。首先分析了任务级调试代理的重要性 ,然后设计出一种跨平台、可扩展的、可移植的、通用的支持系统级和任务级的嵌入式调试代理 ,最后建立了多个调试会话的管理机制 ,在嵌入式软件开发中可以降低开发成本 ,缩短开发周期 ,具有很重要的意义。     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

法律信息库系统

本文分析了法律数据库的结构和特点，介绍了采用面向对象设计方法和超文本数据库技术开发和实现法律信息库系统将作为重要网络资源之一为不同用户进行法律咨询服务。     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

International Journal of Automation and Computing Table of Contents

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Information for authors

正SCIENCE CHINA Information Sciences(Sci China Inf Sci),cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press,is committed to publishing highquality,original results of both basic and applied research in all areas of information sciences,including computer science and technology;systems science,control science and engineering(published in Issues with odd numbers);information and communication engineering;electronic science and technology(published in Issues with even numbers).Sci China Inf Sci is published monthly in both print and electronic forms.It is indexed by Academic OneFile,Astrophysics Data System(ADS),CSA,Cabells,Current Contents/Engineering,Computing and Technology,DBLP,Digital Mathematics Registry,Earthquake Engineering Abstracts,Engineering Index,Engineered Materials Abstracts,Gale,Google,INSPEC,Journal Citation Reports/Science Edition,Mathematical Reviews,OCLC,ProQuest,SCOPUS,Science Citation Index Expanded,Summon by Serial Solutions,VINITI,Zentralblatt MATH.     

Erratum to: Fast global kernel fuzzy c-means clustering algorithm for consonant/vowel segmentation of speech signal

正Erratum to:J Zhejiang Univ-Sci C(ComputElectron)2014 15(7):551-563doi:10.1631/jzus.C1300320The original version of this article unfortunately contained mistakes.Algorithm 6 should be as follows:Algorithm 6 FGKFCM-F clustering Input:(1)X={x_1,x_2,…,x_N},,x_iR~d,i=1,2,…,N,the dataset;(2)C,1C≤N,the number of clusters;(3)ε0,the stopping criterion;     

Journal of Zhejiang University-SCIENCE C (Computers & Electronics) Total contents

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A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.