基于SOPC的M8051嵌入式调试器设计

调试器是嵌入式系统软件开发的重要工具。本文设计了一款基于USB接口并以SOPC方式实现的M8051嵌入式调试器。通过USB通信接口完成调试器与上位机的通信,保证较高的调试速度;以单独的FPGA芯片实现调试器的USB接口、调试命令解析以及JTAG时序生成等功能模块,简化系统设计的复杂度。经测试,该调试系统性能稳定、可靠。     

微控制器开发系统的研究

从微控制器应用系统开发的需要出发，根据芯片的系统结构．本文站在微控制器芯片提供商的角度分析了使用宿主PC机实现一个目标微控制器的开发系统的设计方案，从微控制器CPU核心、片上调试支持、JTAG协议转换器、编程软件工具、仿真调试工具、评估板等六个方面对开发系统进行了研究。     

嵌入式微处理器片上调试系统的设计和验证

为了尽可能保持芯片原有体系结构,综合基于软件监控和基于JTAG的2种方法,提出扩展嵌入式处理器片|=调试系统的完整解决方案.该系统包括PC端的开发环境IDE、命令转发与控制子系统Probe和支持JTAG标准的目标CPU等部分.通过软硬件协同设计和验证,确保系统划分正确,子系统协调工作,并缩短了调试系统的开发周期.     

一种扩展的片上实时调试系统设计

提出了一种为不支持调试模式的CPU扩展调试功能的系统设计方法。该方法在保持原CPU结构性和完整性的情况下，在片上增加了CPU监视／运行分析模块、调试摔制模块、时钟／复化管理和JTAG兼容的调试访问接口，用较少的硬件开销实现了指令／数据断点、单步、运行／停止、CPU复位、查看CPU核心寄存器、读取／修改外部存储器以及在线编程等功能，且调试命令的设置和执行完全独立干CPU，保证了CPU运行的实时性。     

基于Openocd的嵌入式软件开发平台的研究和设计

在以Openocd为调试代理的基础上,研究一种嵌入式源码级编译调试开发平台,并在多目标机上实现;该开发平台以Eclipse为调试前端,实现了与通用远程调试器GDB的无缝集成,并以Openocd作为调试代理,可以通过JTAG接口实现对目标机上目标程序的源代码调试;阐述了基于Openocd的嵌入式软件源码级交叉调试技术,讨论了宿主机/目标机开发模式中源码级调试的原理和方法。     

一种JTAG驱动实现技术研究

以ARM为平台的嵌入式系统已广泛使用,本文研究ARM平台JTAG驱动技术,主要包括ARM核的支持、Flash的操作以及JTAG时序的软件模拟;基于JTAG驱动设计实现了一种调试工具。测试表明,实现方案有较好的性能,为嵌入式系统开发提供了可行、有效的调试手段。     

ARM调试系统中JTAG协议的研究与实现

在系统运行速度快,实时性要求高的32位高端嵌入式应用系统中,如何利用可控的调试手段实现对芯片内部测试与监控一直是ARM调试技术的一个难点.目前基于JTAG协议的调试技术是目前ARM嵌入式系统开发中使用最广泛的一种调试技术.在对基于JTAG协议标准的调试原理作深入研究的基础上,通过GPIO口模拟实现了该协议,并在三星公司的一款ARM芯片S3C44B0X的嵌入式系统中实现了这种调试技术.     

基于JTAG的片上调试器与调试系统的设计实现

提出了一种基于JTAG协议的嵌入式CISC处理器的调试系统的设计方案。针对自主研发的教学用JU-C2型处理器设计了片上调试器和CPU内部寄存器扫描链,为构成一个完整的调试系统,还设计了USB-JTAG协议转换器和PC机控制软件。调试系统可以实现微指令级和机器指令级的单步、断点以及CPU内部寄存器值的查看和PC（程序计数器）写入,还有CPU的运行停止和复位这些常用的调试功能。分别介绍了系统的各个组成部分以及它们的原理,进行了系统测试,验证系统工作的正确性。调试系统对CPU内部数据通路侵入性较小,在教学中也有一定的实用性。     

基于Linux的CPLD在系统升级驱动程序设计

论述了通过微控制器实现CPLD在系统升级的方法。以AT91SAM9260CPU为硬件平台,以Linux2.6.30内核为系统软件平台,基于Xilinx官方JTAG状态机实现源码,编写了CPLD在系统升级的Linux驱动程序。并将驱动以模块加载的方式成功加载进了Linux内核。编写驱动测试程序并调试,结果表明,系统能正常执行xsvf文件,实现在系统升级CPLD。     

一种基于以太网接口的ARM仿真器的设计

在分析传统的ARM系统的调试和仿真机制的基础上,给出了以Samsung S3C44B0X处理器为主CPU的基于以太网接口的ARM JTAG仿真器的设计方案。利用这种仿真器不仅可以体现以太网接口速度快的特点,还可以实现仿真器资源的共享。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

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.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

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.     

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.