如何仿真单片机的外围设备

单片机开发需要良好的软件开发环境支持,现国内外已经有若干软件仿真器支持51系列单片机,但外围设备的仿真仍是软件仿真的一个薄弱环节.本文针对目前较为流行的Keil公司的51单片机软件仿真器,介绍如何利用VC++编写动态链接库,仿真单片机外围设备,从而为软件仿真器提出一种新思路.     

如何仿真单片机的外围设备

单片机开发需要良好的软件开发环境支持，现国内外已经有若干软件仿真器支持51系列单片机，但外围设备的仿真仍是软件仿真的一个薄弱环节。本针对目前较为流行的Keil公司的51单片机软件仿真器，介绍如何利用VC 编写动态链接库，仿真单片机外围设备，从而为软件仿真器提出一种新思路。     

用软件仿真系统代替硬件仿真器开发单片机

从工业控制到家电电脑化,单片机的使用越来越广泛。开发一块专用的单片机控制芯片,主要的工作是开发其专用的软件。而开发软件就需要一套可以帮助设计者跟踪、分析程序执行情况的动态仿真系统,这就是单片机开发系统。这种开发系统一般都采用硬件的在线仿真器,本文将以美国MICROCHIP公司的PIC16CXX系列单片机软件仿真系统为例介绍使用纯软件的软件仿真系统来开发单片机程序的方法及优点。     

基于AT89S51的低成本单片机实验板的开发与设计

做单片机实验需要仿真器和编程器,往往其价格比较昂贵,让人望而却步。据此,该文开发并设计了一套电路简单、价格低廉、实用性强、不需要编程器的单片机实验系统。该系统结合KeilC和Easy 51Pro软件对实验仿真、初学者非常实用。     

新一代51系列单片机仿真器——DUCK-IV

本文对一种新型的51系列单片机在线仿真器的系统功能、硬件结构、,软件特点进行了详细描述,同时介绍了该仿真器中采用的实时跟踪和实时采集技术,以及采用新型器件作为仿真芯片,使其既能仿真内部不带ROM 也能仿真内部带ROM 的单片机的问题。     

单片机虚拟实验室的构想

本文针对大中专院校开设的单片机课程实验教学环节中,单片机硬件仿真器容易损坏及不易维护的问题,提出开发单片机系统仿真软件,建立虚拟实验室的构想。它将完全取代单片机硬件仿真器和单片机汇编语言仿真软件,取而代之的是以PC机为平台,基于VB的可视化界面、事件驱动原理,在VB的环境下,实现对单片机系统软件的模拟和硬件电路的仿真。     

单片机各种ISP下载线的制作

在学习单片机和进行单片机产品开发过程中,我们通常使用仿真器作为调试程序的有力工具。但仿真器价格昂贵,对于初学者和一般个人开发人员很难承受。为此我们可以选用带ISP功能的AT89S51/52系列单片机或者STC89C51RC/52RC单片机,不需要仿真器也能很轻易地完成系统调试和开发。所谓ISP,即In System P...     

ME300系列单片机学习开发系统简介

ME300系列单片机学习开发系统首创将单片机实验板、编程器、仿真器、ISP下载线集成到统一系统中,开发系统上自带一个专用的CPU直接对实验中的芯片进行在线编程控制,配合专门开发的串行下载编程控制软件,可轻松地将编译好的代码下载到实验CPU中进行验证或演示,试验过程中无需拔插任何电缆和芯片,也无需切换电源,整个过程只需利用鼠标操作即可,方便快捷。实验芯片放在40Pin活动锁紧座中,用户可以很方便的更换不同型号的芯片写入程序后用于其他系统,即把ME300B当作编程器使用。同时也可以使用预留的ISP接口连接ISP下载头,对其他目标系统进行在系统编程(ISP-In System Programming),对于产品的软件调试或升级,提供快捷的方案。这样一来,ME300B又可以作为单独的ISP下载线使用了。使用配套的仿真模块与Keil C51调试软件μVision2配合可以直接对实验板上的资源进行在线仿真,也可以通过40Pin外扩接口连接仿真头对外部资源进行在线仿真,可以按单步、断点、连续等方式调试实际应用程序,这样又可将ME300B当作一台独立的仿真器使用。仿真程序窨63k,完全满足开发一般51单片机产品的要求。     

ICE-51/PC仿真器

英特尔公司的ICE—51/PC在线仿真器系列价格低,简化了MCS—51系列微控制器(单片机)产品的硬件和软件组合。新型仿真器系列初期产品为ICE—51FX/PC和ICE—51GB/PC,通过使用可更换探头支持对MCS—51系列产品的目标仿真。ICE—51FX/PC支持现行工业级MCS—51系列产品的开发,包括新型的87C51FC微控制器。除需要连续宿主的场合外,它取代了ICE—5100/252仿     

单片机虚拟实验室的构想

本文针对大中专院校开设的单片机课程实验教学环节中，单片机硬件仿真器容易损坏及不易维护的问题，提出开发单片机系统仿真软件，建立虚拟实验室的构想。它将完全取代单片机硬件仿真器和单片机汇编语言仿真软件，取而代之的是以PC机为平台，基于VB的可视化界面、事件驱动原理，在VB的环境下，实现对单片机系统软件的模拟和硬件电路的仿真。     

单片机交叉C编译移植研究

由于单片机存储结构与传统计算机存储结构差异甚大，因此，移植Ｃ编译器生成单片机交叉Ｃ编译时应涉及存储空间分配，函数头尾码生成，实参生成以及开关语句尾码生成等一系列问题。本文研究解决这些问题的方法，并提出工作帧概念及开关语句自动生成算法，据此可生成高效率的单片机目标代码。     

Extended gaming machine facilities by microprocessor control

Many fruit machines are microprocessor controlled but most appear to the player to be very similar to earlier electromechanical machines. Little advantage has been taken of the opportunity to devise more sophisticated games, which microprocessor control gives. This article describes the implementation of a game which includes some features which would be difficult to implement by other than microprocessor control. It discusses the techniques used, the problems arising and the likely future developments.     

Microprocessors in CRT Terminal Applications: Hardware/Software Tradeoffs

In th development of any microprocessor-based system, the optimum design will be an efficient compromise between hardware and software. In most microprocessor applications, and particularly in CRT systems, there are usually several real-time functions to be performed with timne constraints that cannot be met with a purely software solution. When microprocessors were first introduced, many potential users investigated them for possible application in new products and concluded that the microprocessor was just not fast enough to do the job. Closer examination will show, however, that most investigators only considered purely software solutions to problems, thereby missing the correct assessment of microprocessor capabilities.     

Memories in microprocessor systems

This first article begins by defining some of the terms found in literature dealing with memory components, and then describes the characteristics of the most frequently encountered memory components. The interpretation of the timing diagram of a popular memory component is examined together with the timing diagrams of a microprocessor. The problems of matching the two timing diagrams are illustrated by choosing a Texas Instrument's memory and a Motorola 6800 microprocessor.     

Design of a microprocessor-based process controller using multilevel hierarchical

The problems of replacing existing process controllers with microprocessor-based systems are discussed. A design methodology for implementing a microprocessor-based process control system from an existing design is given, such that strict functional equivalence between the original design and the microprocessor is maintained. The design methodology combines multilevel hierarchical systems and graph theory to deduce a low complexity model of the process control system, which is then analysed and verified interactively on a host computer. The resulting data is formatted and then downloaded into the microprocessor memory of the process controller.     

CAN智能适配卡的设计方案

本介绍了发电机状态监测仪中CAN智能适配卡的功能和硬件组成,详细讨论了ISA总线及单片机对双口RAM的地址空间的分配。针对ISA总线和卡上单片机同时对双口RAM读写数据时的仲裁问题,提出了一种硬件判优的实现方法。并对适配卡的软件设计进行了总体上的阐述。     

VLIW微处理器模拟器仿真实现的几个关键问题

文章就一种VLIW体系微处理器模拟器仿真实现的几个关键问题(如模型建立、串并行的转换和数据相关等)进行了简要讨论,并提出了行之有效的解决方法.     

Implementation of digital controllers—A survey

Stimulated by microprocessor technology there is increasing interest in the issues of digital control implementation. This paper reviews these issues, from algorithms through current hardware up to the various problems arising with non-ideal behaviour of digital controllers.     

基于单片机AT89C52的血流信号采集系统的设计

根据红光和红外光透过手指后光吸收量变化的特点,本文研究了基于单片机AT89C52的血流信号采集系统。该文设计了血流信号检测电路,研究了四点累加平均滤波和五点滑动平均滤波算法,有效的滤除了信号的高频噪声,克服了因个人生理差异引起的信号基线漂移、易饱和等问题。通过VB编程,实现了单片机和PC机之间的串行通信。     

Communication between two microprocessors through common memory

Advances in integration have enabled the design of dual microprocessor systems on a single board for extra processing power. The problems of interfacing these processors are discussed and reasons for preferring shared memory communications rather than I/O are outlined. A system using two 6809 microprocessors is described with the technical problems that were encountered or anticipated in its design. Software developed uses the ‘producer consumer’ analogy and three solutions are demonstrated.