一种基于TMS320C6A8168的FPGA动态配置方法

针对基带处理系统中FPGA传统上电配置中存在的速度和灵活性等问题,提出一种基于TMS320C6A8168的SD卡和网口动态加载FPGA配置文件的方案。该方案以含有4片FPGA和1片C6A8168 ARM处理器所组成的嵌入式系统作为平台,通过修改U-boot中的代码使得基带系统上电运行U-boot时能够选择性地加载PC中FPGA的配置文件,从而使FPGA完成相应的物理层算法及硬件加速。有效实现了对FPGA的配置,提高了FPGA系统配置的灵活性,在基带处理系统中有很好的应用前景。     

基于GoAhead与JTAG的FPGA/CPLD/PROM远程配置方法

提出了一种基于GoAhead嵌入式web服务器和JTAG总线的FPGA/CPLD/PROM器件远程配置方法.设计使用GoAhead嵌入式服务器接收来自以太网的XSVF文件,再由CPU解析并通过JTAG协议对FPGA/CPLD/PROM进行配置文件更新,技术人员可以通过局域网中的任意PC机对目标设备进行远程操作,避免了繁琐而不安全的设备开箱.本方法占用系统硬件资源极少,效果稳定可靠,可作为各类通信设备中FPGA/CPLD/PROM器件的ISP方案,也可方便的用在旧设备的升级改造中.     

采用ARM的多FPGA串口命令选择配置及其应用

针对嵌入式系统中的多FPGA配置问题,结合实际应用,设计了一种基于ARM、NAND Flash存储器和串口的多FPGA命令选择配置方案。该方案以含有4片FPGA的嵌入式系统为例,选用ARM作为主控芯片,使用超级终端输入配置文件选择命令,构建了基于TMS320C6A8168、XC3S400AN和NAND Flash的硬件平台,实现了根据设备的应用差别加载不同FPGA配置文件的功能。详细描述了系统的硬件构成、软件实现以及在TD-LTE无线综合测试仪表中的应用情况。与传统基于专用存储芯片的配置方法相比,该方案大大提高了多FPGA系统配置的灵活性,在通信电子领域具有一定的实用价值。     

借助USB完成FPGA配置的实现方法

引言 由于FPGA具有易失性,所以每次FPGA上电都必须将其设计代码重新装载,这一任务常常由某种专门针对FPGA配置的专用存储器（如EPC系列专用存储器）或专用处理器来完成。针对USB接口设备上FPGA的配置方法问题,本提出利用PC主机,通过USB接口在线对USB设备中FPGA芯片进行配置的一种实现方法。具体方法是将FPGA的配置代码存储于PC机中,PC机通过USB将配置件传送给USB设备,USB设备再借助其内部的微控制器将配置代码装载到FPGA芯片,实现FPGA的配置过程,从而能够免去在系统设计中使用一个专用处理器或专用存储器所造成的占用空间和成本的增加。     

基于ARM微控制器的FPGA配置及应用

微控制器在某些工程应用中经常需要对FPGA进行灵活的配置,采用常规的EPROM配置FPGA很难满足这一要求.提出一种基于ARM芯片的FPGA动态配置方案,将FPGA的配置文件存储在ARM芯片的内部Flash中,从而充分利用了ARM片内资源,实现了FPGA上电动态配置,使得FPGA功能可以在线灵活更新.该方案已成功应用于航空发动机转速测量中,实现了对航空发动机转速的精确实时测量.     

嵌入式系统中FPGA的被动串行配置方式

介绍一种在嵌入式系统中使用微处理器被动串行配置方式实现对FPGA配置的方案,将系统程序及配置文件存在系统Flash中,利用微处理器的I/O口产生配置时序,省去配置器件;讨论FPGA的各种配置方式及各种配置文件的使用;详述被动串行配置的时序及在嵌入式系统中实现的软硬件设计;说明本方案的优越性及应用前景。     

基于CPLD及Flash实现FPGA配置的研究

分析了Xilinx公司的SpartanII型FPGA配置原理及时序图,在此基础上利用有限状态机给出了使用CPLD结合Flash实现FPGA配置功能的设计,并进行了仿真,仿真结果完全符合FPGA的配置时序。设计经过调试已经得到实际应用,并且可以用于其它型号的FPGA。     

基于Monitor的C语言源代码调试器的设计与实现

为解决嵌入式系统不支持本地调试且开发周期较长的问题,使用了一种通过PC机去控制嵌入式系统的远程调试方案.该方案针对32位嵌入式设备,设计并实现了C语言源代码级的远程调试系统.该系统由运行在Windows平台的上位机集成调试软件和驻留在目标设备中的Monitor组成.两部分软件相互作用与协调,用于实现C程序的编辑、编译、调试信息获取以及语句的跟踪调试功能.介绍了基于Monitor的远程调试机理和实现技术.实践证明该设计方案较好地解决了嵌入式系统调试过程中受限于系统自身资源与空间的问题,缩短了系统开发周期,达到了设计要求.     

基于PCI总线的FPGA配置系统的设计

在对FPGA配置比特流文件进行结构分析的基础上,通过系统PCI总线利用Select MAP配置模式实现了对FPGA数据进行在线配置系统的设计,解决了传统数据加载方法中需要加载电缆的限制,完成了对FPGA芯片程序加载过程的完全软件化操作．使得整个系统的配置、调试能够同步进行。实验测试表明,系统工作正常,证明系统原理与硬件设计是成功的。     

基于FPGA和DSP的音频采集卡的实现

本文介绍了一种基于FPGA和DSP的多通道音频采集卡的设计和实现方案,该卡能够工作在多种采样率下并可以使用DSP中不同的音频算法用于满足不同场合,并通过PC104接口将处理后的数据上传至主机.采集卡已应用在船舶航行数据纪录仪VDR中.     

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     

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.     

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.     

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.