基于μC/OS-Ⅱ的μC/IP协议栈在ARM系统中的实现

深入分析了μC/IP协议栈,阐述了其移植原理和实现方案,并给出了在具体软硬件平台上的移植实例.首先,通过分析μC/IP协议栈,结合实时内核μC/OS-Ⅱ与32位ARM7 Core的软硬件平台,论述了μC/IP协议栈的移植原理.然后,根据TCP/IP各层协议的具体实现提出了μC/IP协议栈移植与裁减的一种可行方案.最后,在基于μC/OS-Ⅱ与ARM7 Core的软硬件平台上实现了μC/IP协议栈的移植.实验结果表明移植后的协议栈实现了网络的基本功能,且运行稳定.开源μC/IP协议栈的移植实现,为基于μC/OS-Ⅱ的Internet嵌入式系统应用提供一个小型可裁减的TCP/IP协议中间件.     

功放预失真系统中嵌入式以太网的设计

针对商用嵌入式TCP/IP协议栈费用昂贵的情况并根据功放预失真系统网络通信特点,提出了基于SOPC技术的嵌入式以太网通信模块设计方案。实现了软核NiosⅡ处理器和实时多任务操作系统μC/OS-Ⅱ为中心的硬件平台和软件驱动的设计、多任务操作系统μC/OS-Ⅱ的移植以及嵌入式TCP/IP协议栈的设计,最终在Stratix EP2S60F1020C4开发板上通过了验证。     

一种基于μC/OS-Ⅱ的嵌入式以太网通信实现方法

为实现远程数据采集和实时监控等功能,网络化成为新一代嵌人式系统发展的重要趋势,提出了一种新的低成本以太网接入方案;根据嵌入式系统软、硬结合紧密的特点,选取具有网络模块的PIC18F97J60单片机作为硬件平台,通过移植μC/OS-Ⅱ操作系统,实现嵌入式以太网接入的功能;针对μC/OS-Ⅱ本身不支持TCP/IP网络通信协议,将开源的TCP/IP协议栈LwIP移植到μC/OS-Ⅱ,解决了基于μC/OS-Ⅱ的网络通信问题;通过将硬件电路板与PC机系统调试,测试结果表明,本系统可以很好地实现嵌入式系统与以太网通信的功能.     

Cortex-A8平台的μC/OS-Ⅱ及LwIP协议栈的移植与实现

提出一种嵌入式实时操作系统设备实现接入以太网功能的方案。利用TI公司推出的TMS320DM8168 DaVinciTM数字多媒体处理器的Cortex-A8平台进行μC/OS-Ⅱ和LwIP协议栈的移植并实现嵌入式TCP/IP网络协议。通过对Cortex-A8内核体系结构研究,详细阐述了μC/OS-Ⅱ和LwIP针对Cortex-A8的移植要点与LwIP的高效邮箱机制的实现并给出部分关键代码。通过系统多任务调度及Web server功能应用的测试验证:移植操作系统运行正常,网络通信成功。在嵌入式设备上实现了嵌入式TCP/IP协议,使嵌入式实时操作系统设备具备了接入以太网的功能。     

基于μC/OS-Ⅱ操作平台的嵌入式电网监测仪的研制

μC/OS-Ⅱ是一种适用于嵌入式系统的源码开放的占先式实时多任务操作系统.本文讨论了基于μC/OS-Ⅱ嵌入式系统的网络通信实现,包括μC/OS-Ⅱ实时操作系统、LwIP协议栈的移植和网络设备驱动程序的建立以及系统任务的调度.     

基于ARM的嵌入式通信系统设计与实现

介绍了一种基于ARM的嵌入式通信系统的新方法;从嵌入式处理器的设计、串口电路的设计、存储系统的设计、以太网电路的设计、μC/OS-Ⅱ操作系统的移植、串口通信协议的编写、TCP/IP协议栈的选用等方面详细介绍了整个系统平台的设计实现过程.     

LwIP协议栈在SoPC系统中的实现

提出了基于μC/OS-Ⅱ的LwIP协议栈在SoPC系统中实现的方案.介绍了嵌入式TCP/IP协议栈LwIP,阐述了其移植原理;在SoPC系统上实现了LwIP协议栈的移植,并给出了在具体软、硬件平台上的移植实例.实验结果表明:移植后的协议栈实现了网络的基本功能,且运行稳定,为SoPC类型的Internet嵌入式系统应用提供了一个基于μC/OS-Ⅱ的小型网络模块.该方案可应用于信息电器和网络化的仪器、仪表方面.     

基于ATmega128嵌入式网络接口的设计与实现

设计了以ATmega128为核心的以太网接口实现方案,描述了该系统硬件架构的设计方法.在系统上移植了μC/OS-Ⅱ操作系统,对TCP/IP协议栈提出了裁剪和改进方法,重点阐述了基于μC/OS-Ⅱ消息机制和函数调用的TCP协议的模块结构.最终给出了系统性能测试结果.     

基于μC/OS-II的μC/IP协议栈在ARM系统中的实现

深入分析了μC/IP协议栈,阐述了其移植原理和实现方案,并给出了在具体软硬件平台上的移植实例。首先,通过分析μC/IP协议栈,结合实时内核μC/OS-II与32位ARM7Core的软硬件平台,论述了μC/IP协议栈的移植原理。然后,根据TCP/IP各层协议的具体实现提出了μC/IP协议栈移植与裁减的一种可行方案。最后,在基于μC/OS-II与ARM7Core的软硬件平台上实现了μC/IP协议栈的移植。实验结果表明:移植后的协议栈实现了网络的基本功能,且运行稳定。开源μC/IP协议栈的移植实现,为基于μC/OS-II的Internet嵌入式系统应用提供一个小型可裁减的TCP/IP协议中间件。     

实时操作系统μC/OS-Ⅱ下TCP/IP协议栈的实现

结合在ez80和ARM 7两种系统上的具体实现,说明如何在嵌入式实时操作系统μ C/O S-Ⅱ上移植、实现LwIP这套TCP/IP协议栈,使μC/OS-Ⅱ成为支持网络的RTOS.     

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.