基于S3C2410A和UDA1341TS的嵌入式音频系统设计

介绍了基于S3A2410A和UDA1341TS语音编解码芯片的嵌入式音频系统的设计方案;首先介绍了音频编解码的基本理论和IIS总线协议、IIS总线和MSB-justified总线的时序区别;研究了S3C2410A的IIS总线接口,UDA1341TS的内部结构特点和IIS总线、L3总线,分析了UDA1341TS的工作模式,给出了S3C2410A和UDA1341TS的IIS总线接口以及L3总线接口电路设计方案,并分析了录音和播放音频的程序的设计方法;该嵌入式音频系统设计实现了录音、播放,调节音频效果等功能,利用多个小块缓冲区,提高了提高系统整体性能;文中提出的嵌入式音频电路以及音频处理程序已成功应用于E-BOOK等手持终端设备上,具有通用性和参考价值。     

基于IIS总线的嵌入式音频系统的设计

本文介绍了基于IIS总线的嵌入式数字音频系统,实现了以Samsung S3C44B0 ARM7处理器为主控核心、以Philips UDA1341TS为编解码芯片的软硬件设计方案。硬件方面,实现了NOR Flash,晶振电路,复位电路,串口电路,JTAG接口电路的设计,并建立了与UDA1341TS的连接;软件方面,UDA1341芯片提供放音和录音接口,可直接驱动耳机或其他音频设备,实现了音频信号的A／D、D／A转换、存储、回放等功能。该系统具有设计灵活、扩展性好和数据处理速度快等优点。     

基于S3C44B0X的音频录放系统实现

目前越来越多的音频播放产品采用了嵌入式技术。本文介绍了一种基于嵌入式芯片的音频系统。S3C44BOX自带的IIS音频总线接口,与飞利浦UDA1341芯片进行连接,构建嵌入式音频系统,实现音频的采集与回放。介绍了IIS总线的原理,给出了音频录放系统的硬件电路及应用程序的实现要点。     

基于ARM7与FPGA组成的可编程控制器

本文以32位嵌入式微处理器S3C44BOX(ARM7)为控制核心,以CAN为现场总线设计可编程控制器.描述了系统的工作原理及PLC主机各功能模块与嵌入式微处理器S3C44BOX的接口电路原理.采用FPGA扩展可编程控制器所需要的I/O口及A/D、D/A的扩展电路;并用另一块FPGA嵌入智能控制算法.由于系统采用了集成众多功能的嵌入式微处理器S3C44BOX,从而简化了电路的设计,提高了系统的可靠性.     

基于嵌入式Linux和FPGA的数据通信系统设计

针对嵌入式系统在数据采集和智能控制领域的应用需求,设计并实现了一种基于嵌入式Linux的S3C2440A处理器和FPGA的数据通信系统。介绍了FPGA中总线接口设计和ARM-Linux下的驱动程序设计,并给出了部分源代码和测试方法。测试结果表明,该系统成本低,功能完善,运行稳定,在实际工程应用中具有一定的价值。     

基于ARM9的嵌入式网络语音终端系统设计

以网络语音通话系统为背景,提出一种采用S3C2440微处理器实现网络语音通信功能的方案。该设计结合DM9000CEP以太网控制芯片实现以太网通信功能,使用UDA1341TS音频编码器完成语音信号的A/D、D/A转换。该方案构建的嵌入式VoIP网络电话具有可靠性高、操作性强与可扩展性高等特点。     

S3C2510A的网络通信接口的设计

本文介绍了嵌入式系统芯片S3C2510A的网络通信接口模块的设计方法。介绍了设计此嵌入式系统以太网通信接口模块所需的以太网控制芯片DM9161和S3C2510A嵌入式微控制器。对接口电路做了详细阐述,并给出了的软件设计方案。该模块用途广泛,具有良好前景。     

基于嵌入式Linux的音频系统①

利用SamSung公司的S3C2410微处理器和Philips公司的UDA1341音频芯片设计了一种应用于GPS车载导航的嵌入式音频系统。该嵌入式音频系统硬件部分采用基于IIS总线的音频系统体系结构;软件上,以嵌入式Linux操作系统作为平台,实现对UDA1341的驱动。     

ADSP-TS101外部总线接口技术

ADSP-TS101是ADI公司新一代高性能浮点DSP,开始应用在高速数据采集和处理系统中。TS101外部总线接口可编程,方便和各种总线外设接口。本文结合TS101与同步FIFO、SDRAM和FPGA的接口实例,介绍了TS101的接口技术,可作为基于TigerSHARC系列DSP的应用系统设计参考。     

ADSP-TS101外部总线接口技术

ADSP-TS101是ADI公司新一代高性能浮点DSP,开始应用在高速数据采集和处理系统中.TS101外部总线接口可编程,方便和各种总线外设接口.本文结合TS101与同步FIFO、SDRAM和FPGA的接口实例,介绍了TS101的接口技术,可作为基于TigerSHARC系列DSP的应用系统设计参考.     

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。     

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     

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.     

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.