基于MMC2107 OnCE的Flash编程技术

阐述了如何通过Motorola 32位MCUMMC2107的OnCE接口,实现对MMC2107的片外F1ash存储器的编程。详细介绍了OnCE模块的实现原理、内部工作机制、硬件系统设计、软件编程方法及程序接口。并且提出了OnCE简易硬件接口的原理设计、编程模型、软件接口划分、操作流程,以及提高Flash编程速度的改进方案,探讨其中一些关键技术和实现细节。     

基于OFDM的软件无线电平台设计

上世纪90年代发展起来的软件无线电,其重要价值在于：传统的硬件无线电通信设备只是作为无线通信的基本平台,而许多的通信功能则是由是通过构造一个通用的、可复制编程平台,使其工作频段、调制解调方式、业务种类、数据速率与格式,控制协议等都可以进行重构和控制,选用不同的软件模块就可以实现不同类型和功能的无线电台,打破了有史以来设备的通信功能的实现仅仅依赖于硬件发展的格局。本文介绍了一种基于OFDM的软件无线电平台的设计,重点介绍了基带收发处理模块的设计与实现方案。     

实时硬件系统中控制方法的研究

由于实时硬件系统的规模和复杂度不断增大，系统结构的模块化设计已成为硬件系统开发的发展趋势。研究了硬件系统中模块控制的方法和特点。结合MPEG2电视编码器中各功能模块的特点，提出了适合该硬件系统的模块控制方案，说明了控制模块的硬件设计思想和软件实现。实践证明，该方案满足系统实时性和可靠性的设计要求。     

HY-240128M-201图形点阵式液晶显示模块及其应用

本文首先从应用角度阐述了基于T6963C控制器的HY-240128M-201图形点阵式液晶显示模块(LCM)的组成和工作原理,然后给出了用单片机对模块进行控制的硬件电路和软件编程方法,最后介绍了调试图形点阵式LCM时的相关注意事项。     

微机励磁调节器实验仿真平台研制

本文介绍的微机励磁调节器实验仿真平台,包括硬件仿真平台和软件仿真平台。硬件仿真平台是用Proteus对微机各个功能模块的硬件进行仿真,软件仿真平台是利用软件开发环境和硬件仿真平台一起进行的软件各个模块的开发和验证。本文还通过举倒介绍硬件仿真模块的应用和软件仿真模块的功能。硬件仿真平台和软件仿真平台联合仿真能够模拟微机励磁实验,可以辅助实验教学。     

机载PD雷达信号处理分析软件仿真

根据某雷达信号处理硬件系统的主要处理方式,分析了机载PD雷达信号处理的算法及其主要过程,提出了软件构造模型及其接口方式。文中介绍了基于上述分析编程的机载PD雷达信号处理系统的仿真模型工具包,分析了工具包使用的软件仿真的算法及编程实现方法。该工具包包含了从雷达回波AD采样数据直到产生目标原始点迹的主要过程模块,可以得到各处理节点的中间信号,较好地实现了对硬件系统的仿真分析,具有灵活、真实和实用的特点。     

基于单片机控制的数显质量测量仪设计

从硬件和软件两个方面介绍了以STC89C52RC单片机为核心的智能数显质量测量系统的组成。利用模块化设计,系统的硬件分成质量数据采集模块、单片机控制数据处理模块和人机交互界面模块等三大部分;软件部分运用单片机C语言进行编程,实现该设计的全部控制功能。     

嵌入式linux中以太网设备驱动的设计与实现

文中根据嵌入式Linux下以太网设备驱动的设计架构和编程要点,给出了网络驱动设计方案,并结合具体的硬件环境完成了网络驱动程序的编写。为了提高程序代码的可重用性和可移植性,该方案将网络驱动程序分离为硬件接口层和软件层,软件层屏蔽了底层硬件的特性,从而可以在保证设备驱动程序质量的基础上,降低开发难度,提高开发速度。     

S7-300软冗余系统在锅炉FSSS中的应用

在西门子S7-300软冗余系统工作原理基础上,提出了软冗余系统的硬件组成及程序实现方法。通过配置电源模块、CPU、冗余模块、通讯模块以及I/O模块等相关硬件,准确完成软件组态,精确编程下载与调试,实现锅炉FSSS控制系统的冗余功能。运行结果表明,控制系统可以在100 ms以内完成主站与从站的冗余切换,系统的可靠性能够满足锅炉安全运行的标准。     

S7—300软冗余系统在锅炉FSSS中的应用

在西门子S7—300软冗余系统工作原理基础上,提出了软冗余系统的硬件组成及程序实现方法。通过配置电源模块、CPU、冗余模块、通讯模块以及I／O模块等相关硬件,准确完成软件组态,精确编程下栽与调试,实现锅炉FSSS控制系统的冗余功能。运行结果表明,控制系统可以在100ms以内完成主站与从站的冗余切换,系统的可靠性能够满足锅炉安全运行的标准。     

Personalizing ISDN

It is argued that making integrated services digital networks (ISDNs) more popular among personal computer users is essential for ISDN to prosper. Users in offices, businesses, and at home form a large potential ISDN market. Existing ISDN interface modules such as ISDN adapter boards for personal computers, are limited to ISDN features and can hardly handle the various needs of personal users. An ISDN interface module for personal computers must be designed to handle various applications and provide any-to-any communications. An ISDN personal computer interface developed to handle digital and analog communication protocols and flexibly combine resources is described     

Software Protocol for Handling ISDN in the Packet-Switched Network

The Integrated Services Digital Network (ISDN) provides basic architecture for existing, as well as future residential plus business communications. ISDN overlayed with CCS#7 of a digital PSTN (Public Switched Telephone Network) can be the ultimate, ubiquitous network for circuit switch (voice, data), packet switch (voice, data), and private line (voice, data) applications. Assuming that the present ISDN has to interwork in the present physically separate overlayed networks (voice and data), significant problems are expected to emerge for designing hardware and linking softwares for handling packet traffic. In this paper, the software-related problems, when ISDN packet distribution nodes have to handle an ISDN interface, will be outlined with an ISDN software protocol solution. An approximation of the delay involved in the telephone switching system which is part of ISDN processing as well as the delay for the interface gateways, the HOST computer nodes, and the LAN and WAN computer nodes will be identified and formulated to reflect the total performance measure defined. Major emphasis is given to flow and congestion control performance measures in the ISDN Gateways, which are analyzed and simulated with the assistance of the basic delay table transfer software model developed for the IMPS and gateways in the ARPANET, MILNET, and MINET. The performance evaluation of this basic ISDN interfacing software, which only involved one ISDN level, i.e., the HOST or gateway and its related subnetworks, is simulated on sections of these networks to illustrate its congestion control effectiveness. There are six mathematical software techniques to account for end-to-end delay, which form the basis for the solution to these ISDN software-hardware problems in the Interface Gateways connecting the electronic switch to the computer network components.     

B-ISDN

An enhanced ISDN (integrated-services digital network) system that provides the switching and transmission capability for 2-Mb/s and 140-Mb/s channels for dialogue and distribution services is discussed. The main subjects are the transmission modules for subscriber-line and subscriber-premises applications     

适配于ISDN的综合业务局域网设计

现有ＬＡＮ的传输能力在很大程度上可满足传输综合业务的要求，现有ＬＡＮ适配于ＩＳＤＮ的直接方法是在ＬＡＮ上实现ＩＳＤＮ功能，从而达到ＬＡＮ工作站与ＩＳＤＮ间业务的完全互通，在ＬＡＮ上实现ＩＳＤＮ功能的方案是：（１）在ＬＡＮ上增加综合业务传输接口，该接口不同于ＬＡＮ软件提供的接口，具有实时性，而且该接口的设计应使ＬＡＮ应用与综合业务应用间互相独立；（２）开发在工作站上与ＬＡＮ应用软件并发运行的综合业务     

ISDN in North America

The North American ISDN Users' Forum (NIUF), intended to bring together the communities involved in shaping a market-driven competitive ISDN, is discussed. These communities include users, service providers, network equipment manufacturers, customer premises-equipment (CPE) manufacturers, and applications software developers. The role of the NIUF in the product development cycle, NIUF activities, and other important ISDN activities that complement the NIUF work are described. The beginning deployment of a national ISDN and a major demonstration of ISDN capability within North America are also discussed. It is argued that the budding cooperation between the NIUF, the standards bodies, the Corporation for Open Systems (COSs), and Bellcore suggests that migration toward a single set of well-defined specifications is underway     

Switching in the Broad-Band ISDN

The enhancement of ISDN with broad-band services is investigated from the viewpoint of switching systems. Approaches in system architecture and switching technology are described. The extension of an ISDN switch with broad-band modules is presented as an example.     

The value of ISDN for banking applications

US Bank's experience with a number of applications supported by Northern Telecom's DMS-100 integrated services digital network (ISDN) is discussed. Some of the applications that US Bank has been using, as well as some applications planned for near-term implementation, are described. The current applications supported by ISDN are the centrex telephone; message desk call receptionists; systems network architecture (SNA) host access; automatic teller machines; point-of-sale network; and wide-area networking. Future ISDN applications include support of loan approvals and service kiosks     

引进程控交换机的ISDN功能扩展

在引进数字程控交换机上实现ＩＳＤＮ功能扩展是一项迫切的任务，本文在总结实际工作经验的基础上，以Ｓ１２４０系统为例，分析了ＩＳＤＮ功能实现的方案，并在软件工程思想的指导下，结合现有的软件开发环境，描述了其软件实现原理。     

Implementing ISDN in the United States

Planning for implementation of ISDN is proceeding at a rapid rate throughout the United States. Planning for nationwide deployment of common-channel signaling to support database access, as well as internode signaling for ISDN is also underway. This paper describes planning for trials and initial applications of ISDN and common-channel signaling for service starting in late 1986 through early 1988, as well as ISDN demonstrations, some already in operation. In addition, this paper discusses the network and regulatory environment for ISDN implementation in the United States, standards for the U.S. environment, and trials of transition services.     

Switching System Software Design for ISDN

The ISDN offers various services through multipurpose digital subscriber lines. The switching program for the ISDN should be so designed as to realize the control of various voice and nonvoice services and provide for developing service enhancement. To attain the goal, the ISDN services are classified hierarchically and each category is allocated to appropriate network nodes for implementation. As a result, the local switching program provides an out-slot subscriber line signaling capability and call connection with appropriate compatibility checking including a check for access capability to communications processing nodes. The switching program modules specific to analog services and those specific to digital services are separated to allow the use of the existing program file and to afford easy program design and maintenance. Remote-controlled switching is a suitable means for an economical introduction of the ISDN services to low traffic density areas. Special routing and reliability arrangements as well as the program structure for a remote-controlled switch are discussed.