基于DSP和CPLD的FPGA在线配置

介绍Xilinx公司FPGA的几种基本配置模式,在实际图像处理算法评估系统中设计了基于DSP和CPLD的配置电路,完成对系统中FPGA的在线从并行(SelectMAP)配置.减少器件数目,增加硬件系统的灵活性,并详细介绍该配置电路的具体实现过程和实现方法.     

MCS-51与FPGA/CPLD总线接口逻辑设计

设计一种基于MCS-51单片机与FPGA/CPLD的总线接口逻辑电路,实现单片机与可编程逻辑器件数据与控制信息的可靠通信,使可编程逻辑器件与单片机相结合,优势互补,组成灵活的、软硬件都可现场编程的控制系统.设计中采用VHDL语言,实现MCS-51单片机与FPGA/CPLD的总线接口逻辑设计.实验表明,该总线接口逻辑电路工作稳定、可靠,使MCS-51单片机与FPGA/CPLD能够完美结合.     

单片机与FPGA/CPLD总线接口逻辑设计

设计一种基于MCS-51单片机与FPGA/CPLD的总线接口逻辑,实现单片机与可编程逻辑器件数据与控制信息的可靠通信,使可编程逻辑器件与单片机相结合,优势互补,组成灵活的、软硬件都可现场编程的控制系统.在设计中采用VHDL语言,实现MCS-51单片机与FPGA/CPLD的总线接口逻辑设计.试验表明,该总线接口逻辑工作稳定、可靠,使MCS-51单片机与FPGA/CPLD能够完美结合.     

用CPLD和FLASH存储器配置FPGA

随着FPGA生产商推出更高密度FPGA器件,要求更多的配置芯片存储配置数据并配置FPGA.本文介绍了采用计算机并口下载配置数据并用CPLD、FLASH存储器组成的被动串行（PS）配置系统配置高密度FPGA的方法,其方法是用CPLD作为控制器控制FLASH存储器对高密度的FPGA进行配置,通过使用一个FLASH存储器和一个CPLD器件可代替容量有限的专用配置芯片,具有配置速度快、实现容易的特点.     

FPGA的AP模式及在可重构仪器中的应用

针对目前在可重构仪器设计采用PS配置方式需增加CPLD或单片机配置电路且配置时序较繁琐的问题,提出一种基于FPGA的AP配置模式可重构仪器设计方案.采用flash和SD卡存储软硬件配置文件,在SOPC Builder中调用ALTREMOTE UPDATE、PFL和SD卡控制器IP核,实现FPGA的AP配置模式.该模式...     

基于I2S总线实现嵌入式语音采集与回放

提出了基于I2S总线,使用嵌入式微处理器LPC2478和立体声编解码器UDA1380实现嵌入式语音采集与回放的方法;在简要介绍I2S总线原理、LPC2478的I2S总线接口特点和立体声编解码器UDA1380的基础上,详细描述了LPC2478与U-DA1380之间的硬件接口设计:语音数据传输采用I2S总线,控制命令传输采用L3总线,也详细说明了系统软件设计:使用LPC2478的I/O引脚模拟L3总线实现对编解码器UDA1380的初始化,将LPC2478的I2S总线输入、输出通道均初始化为主模式,并连接至GPDMA,设计了用于I2S数据处理的GPDMA驱动程序,最后说明了语音采集和回放程序的实现流程。     

基于Nios Ⅱ的WTB网络节点机的设计与配置

绞线式列车总线(WTB)是TCN制订的用于列车级车载数据通信的总线标准;根据WTB标准和实际的功能需求设计出系统框架方案,该方案采用FPGA作为核心器件,将Altera的Niso Ⅱ软核处理器与WTB控制逻辑集成在单片FPGA内,并利用CPLD配置控制器从Flash存储器中读取配置文件对基于Nios Ⅱ的嵌入式可编程逻辑器件FPGA进行系统配置和配置文件升级的新方案;大幅度地减小了产品的体积和重量,降低了硬件开发成本.     

基于LXI总线的可重构软硬件一体测试仪

为解决传统测量仪器在功能、成本和体积等方面的矛盾,介绍了一种基于LXI总线的可重构软硬件一体测试系统;该系统由ARM、FPGA、CPLD等器件协同工.作,通过LAN接口从PC机获取配置命令,在线配置FPGA电路结构.配合多路模拟信号采集和发生单元,可同步实现示波器、多用表和激励源等多种仪器功能,并可进行灵活组合;可重构一体测试仪具有LXI总线设备升级成本低廉、使用灵活等优点,同时充分利用FPGA在线可重配置技术和通用信号调理技术,实现了多仪器功能的集成;为未来型号测试任务中应用可重构测试技术奠定了基础.     

基于CPLD的多普勒声纳回波信号仿真卡设计实现

介绍一种基于CPLD的多普勒声纳回波信号仿真卡的设计实现,该板卡作为PXI测试系统的一个组成模块,数据交换基于PXI总线,使用S5920实现总线控制,利用CPLD实现板卡的时序逻辑控制,外围电路包括信号调理与匹配电路、DDS电路、A/D采集电路、高速FIFO存储电路、D/A转换电路等。重点介绍了CPLD内部功能模块的实现。该设计已成功应用于多普勒声纳的PXI测试系统中。     

基于微机并口技术及CPLD技术的新型模数转换接口

以微机并口通讯技术及 CPLD技术为背景 ,论述了一种采用复杂可编程逻辑器件 CPL D并通过微机并行口 EPP工作模式实现的新型高速模数转换接口电路     

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.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.