Based on the research and design of serial virtual instrument , a concrete example - train brake " s coefficient of friction detecting system , is introduced in aspect of its all parts working principle and its virtual instrument realizing method 在串行口虚拟仪器系统的研究与设计基础之上，本论文介绍了一应用实例? ?火车闸片摩擦系数测试系统。介绍了该系统各部分的工作原理以及虚拟仪器的实现方法。
With the deep analysis on the system architecture of tms320c25 , the functions provided by the tms320c25 architecture have been simulated , which include the addressing mode ' s processing simulation , interrupt simulation , timer function simulation , serial port simulation , program control simulation 经过深入分析tms320c25系统结构，对tms320c25结构提供的功能进行了模拟，它们包括寻址方式模拟、中断的模拟、定时器功能模拟、串行口模拟、程序的控制模拟。
The minimum control system of single - chip micro - controller has two part of binary systems serial communication . for the communication between pc and the single - chip instrument , i chose to connect a chip named max232 to proceed the level conversion in electricity , establish the correspondence agreement , drawing the hardware connection diagram , and designed the correspondence procedure process with parts of procedures code ; for the communication between the single - chip instrument and the fx489 , thesis uses 8251a to expand 89c51 for a serial port 对于pc机和单片机的通信，论文选择了接口芯片max232进行电平转换，设定了双方通信协议，画出硬件连接图，并设计了通信程序流程及部分程序代码；对于单片机和fx489之间的串行通信，论文采用了8251a扩展了89c51的一对串行口，同时也设计了这部分的通信程序流程及程序代码；另外，还对89c51扩展了一片数据存储器6264 。
A standardized communication protocol is running on all instruments , which is built by ourselves and has the code name of flexlynx , it provide complex functions like data frame generation , data integrity check and time - out retransmission , so that data maintain its integrity while exchanging between pc and instruments 所有的子系统均运行相同的终端通讯协议，我们自行设计并称之为flexlynx的协议，这种基于串行口物理设备的协议提供数据包组装，复杂数据校验和超时重传等机制保证可靠的数据传输。
The simulation of the addressing mode provides the possibility for the instruction simulation , and the simulation of the interrupt , timer and serial port lets the simulator implement the functions of the interrupt , timer and serial like a processor , and the program control simulation provides the possibility for running the program . this function is also the base for debugging program , which can set step running mode , set break points by using this program 寻址方式的模拟为指令的模拟提供了可能，中断、定时器和串行口的模拟使模拟器可以象处理器一样完成中断功能、定时功能和串行通讯功能，程序控制的模拟为程序运行提供了可能，这一功能又是调试程序的基础，通过这个程序程序可以单步执行，设断点执行。
Software is writed in module , this can make being maintained and added some function easy than ever . finally , in order to realize the communication between the intelligent release and the pc or between the intelligent release and the other control unit , two communication methods used by the rs - 485 communication and can communication are discussed 最后，就tms320lf2407本身具有的一个全双工的sci串行口和一个can2 . 0模块，提出了基于rs - 485总线标准的一主多从式串行通信和基于can总线的多主通信两种设计方案，以解决智能脱扣器和外界的通信问题，实现脱扣器的的集中控制和调度管理。
The control system of the test - bed is specially considered and this article employs several programming technologies to study the control system ' s serial communication . these technologies include mscomm , api and compilation languages that are used in windows condition . according to language independence and robust versioning of component object module , the paper presents using com program technology to develop a component object module on serial communication 文章重点考虑了试验台的控制系统部分，介绍和分析了串行通信实现控制的方法，着重研究了mscomm控件法、 api函数法以及汇编库函数法在windows环境下实现串行通信的的编程，而且本文根据组件对象模型的语言无关性，利用com编程技术自行开发了一个组件用于串行口通信。
This paper introduced how to communicate with solar power station by serial communication in order to get the running data and edit the parameters and how to use dialing method of modem to get those data so as to achieve distant data communication in detail . this paper also discusses how to send data to internet by using network technology and how to analyze , display and print those data to achieve distributing monitor system . in the end , this paper analyses the system and gives some advice for improvement 论文详细讲述了如何通过rs485串行口和数传电台与光伏电站进行数据通信以获得电站运行数据、修改电站参数；如何采取modem拨号方式获得这些数据而实现远程数据通信；还阐述了如何利用internet技术发送这些数据到互联网上和对光伏电站运行数据进行分析、管理、显示、打印而实现网络监控管理，从而实现光伏电站的分布式监控。
According to the trend , this paper introduces the technology of database and pc ' s serial port communication , which is adopted as the technology premise of wireless surveillance control system . and it illustrates the key technologies of how to realize the wireless surveillance control system . by making full use of its possible expansibility , flexibility and pervasive applicability , as well as the serial port communication technology , scada could help to transmit batch of data effectively , extend the ascii code serial port communication processing in the mscomm components and transmit the large - scale data stream 针对这一趋势，论文在介绍了作为无线监控软件系统的技术前提的数据库技术和微型计算机串行口通信技术的基础上阐述了实现无线监控软件系统的各项关键技术，对利用数据库系统对数据结构间的关系的严格定义和约束实现系统的可扩展性、灵活性与普遍应用性、利用计算机串行口通信技术实现批量数据传输、实现了数据的有效传递、 mscomm控件中扩展ascii码的串口通信处理和大型数据流的传输等项技术作了详尽地说明，并对已完成的系统作出了评价，提出可以进一步改进的意见。
The relevant program of both the dongle and the computer have also been developmented . a parallel port and a serial port are provided for the pcb . there is a program ( in vhdl , vhsic hardware description language ) carrying out in the pld which implementi ng the parallel protocol . an encrpt arithmetic is designed and embeded in pld . to providing a interface for the user , a dll ( dynamic link library ) is developmented in c + + builder 所设计的电路板上可以选择连接串行口或者并行口，在pld内用vhdl ( vhsichardwaredescriptionlanguage ，硬件描述语言)实现了并口的通信协议和一个自行研制的密码算法，并在c + + builder环境下开发了配套的上位机软件，主要是提供了dll (动态链接库)和一些函数用于pc机和加密锁之间进行通信。
