基于嵌入式系统的手机编程开发平台

为满足研究和教学的要求,设计了一个能满足教学和开发双重需求的手机编程开发平台。手机编程开发平台具有手机功能设计和应用开发所需要的全部硬件支持,软件系统支持WinCE和Linux。硬件平台由通信模块、ARM处理器模块、彩色显示和键盘模块以及输入/输出模块等组成;软件平台包括Bootloader、嵌入式操作系统以及GUI。实际测试证明,该手机编程开发平台满足了设计要求,具有很高的实用价值。     

突发通信中串行数据采集系统的研究

针对突发通信中高速数据采集系统的需求,采用异步串行通信芯片ST16C2550构建PC机与DSP问实时信息处理系统的高速串行通信模块,能显著提高DSP的通信接口能力.同时上位机采用LabVIEW图形化编程平台,基于循环查询方式的设计思路,实现了上位机通信的快速编程,短时间即可完成系统开发,从而极大的提高了开发效率.经测试和实践证明,该系统在115 200bps速率工作稳定,达到了突发通信应用要求.     

基于VC++和Windows API的串口通信程序设计

基于VC++6.0和Windows API函数开发了一种串口通信程序。该程序采用单线程消息响应机制,利用定时器消息响应查询串口来实现数据的接收。编程方法减小了设计难度,提高了开发效率。给出了基于消息机制的程序框图和部分程序代码,并编制了友好的人机交互界面。在实际使用过程中,稳定可靠,可作为其他串口通信编程的参考。     

面向通信领域的基于前后台的消息调试与过滤机制*

给出了一种适用于通信领域的基于前后台的消息调试与过滤方案,该方案采用消息代理通信的方式屏蔽前后台软硬件平台的异构性,在消息跟踪和记录模块中引入消息过滤机制,在后台消息的显示和打印输出中引入消息分级机制。基于该方案建立的嵌入式软件开发平台,实现了对面向通信领域的应用软件模块中消息的有效调试、测试、跟踪和监控,大大提高了此类软件的开发效率和可靠性。     

一种ATCA3.1系统节点板间通信机制的设计

为了解决ATCA3.1系统中各个节点板间的管理平面数据的交换问题，开发了节点间通信模块。该模块通过消息的方式完成不同节点间数据的交换，根据BSD套接字接口，以地址侦听方式设计通信机制，封装底层通信通道。在Linux系统下编程实现了通信机制，证明了该机制可以解决通信阻塞问题，具有较高的效率。     

STM32CubeMX的全速USB通信及测速模块设计

针对微处理器USB通信设计中通信协议以及底层驱动开发的复杂性导致其开发周期较长的问题,给出了一种利用STM32CubeMX及LabVIEW图形化编程工具实现STM32全速USB通信的方法.首先利用STM32CubeMX快速生成USB基础配置及初始化函数并通过Keil进行通信程序的编写完成USB从机设计.主机方面使用LabVIEW图形化编程工具进行编程设计,并通过NI VISA软件生成驱动,实现USB主机与从机之间的数据传输,并完成通信速率测试.经试验验证该方案开发便捷且传输速率可靠,可以作为一种基于STM32 HAL库的库函数版本下STM32全速USB通信开发的参考方案.     

单片机与PC机互连系统设计

介绍一种实现PC机与多单片机远程串行通信的一种方案,给出了PC机与80C51单片机的硬件连接电路和通信协议,较方便的实现了PC机与多台单片机的远程串行通信。该方案克服传统开发中编程难度大,开发周期长的缺点,同时可以独立于操作系统的TCP/IP协议。     

嵌入式软件开发平台中的文件系统封装机制

针对嵌入式软件开发中操作系统多样性与应用软件领域相关性等特点,面向特定应用领域的嵌入式软件开发平台通常会对嵌入式操作系统实现功能进行封装。嵌入式操作系统提供的文件系统功能较简单,不能满足复杂软件（特别是通信领域应用软件）文件载体多样性的需求。给出了一种嵌入式文件系统封装方案,该方案把文件管理、内存设备、FTP服务器与前后台通信机制相结合,给出了相应的编程接口,并主要基于商用VxWorks操作系统对方案具体实现进行了探讨。     

VC＋＋中UDP通信的实现

WINSOCK是在Windows进行网络通信编程的API接口,也是Windows环境下网络编程的事实标准。UDP是通信中常用的协议,文中给出在VC 中用UDP协议开发网络通讯程序的一个框架模型,以该模型为基础可以开发自己的通信程序。通过实验证明该模型方便易行。     

用Windows API编制通信程序

一、引言 Microsoft Windows使在微型机上进行软件开发的编程环境发生了划时代的变化,Windows 3.1 SDK提供了从应用编程接口API到各种调试工具,使我们用C进行应用程序开发效率大为提高。本文通过使用Windows的API和C 7.0,利用Windows安装的中断方式驱动的通信设备驱动程序COMM.DRV和API中一组通信功能函数,可高效地完成通信应用程序中一些常见任务的编程。     

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.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

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.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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