阐述了一个由上位PC机和AT89C52下位单片机组成的主从分布式温度巡回检测系统。主从机采用RS-485 串行通讯标准进行通信,可在下位单片机实现基本的温度数据巡回检测基础上,由上位PC机实现综合处理功能或扩展为远程操作。整个系统具有巡检速度快,扩展性好的特点。 Abstract: In this paper,a top PC and AT89C52 under-bit microcontrollers from the main component of the tour distributed temperature detection system is presented. Master and slave can use RS-485 serial communication standards for communications.Based on next-bit machine for basic goods temperature detected data Tour, the top can achieve the integrated treatment of PC functions or for the expansion of long-distance operation. The entire inspection system is fast, expansion.
上传时间: 2013-10-13
上传用户:zhoujunzhen
量测/测试所面临之问题 此测试验证上,要使用NI公司之LAB VIEW及DAQ CARD来取代AUDIO PRECISION及其所附软体ATS。首先需克服硬体解析度上的差异,再来是FFT(FAST FOURIER TRANSFORM,快速传立业转换)演算未予的撰写,这将会影响MULTI-TONE讯号上PEAK值的侦测。另外,以RS-232为I/O介面,并呼叫客户所提供之DLL档来与DUT内的IC沟通,但因LAB VIEW无法直接呼叫其STRUCTURE,故需用VC++再编译一层新的DLL来供LAB VIEW使用。
上传时间: 2013-12-13
上传用户:longlong12345678
模块结构框图和功能描述 模块结构框图如图:采用8位单片机89C52,时钟电路使用片内时钟振荡器,具有上电复位和手动按键复位功能,外接WDG复位电路。通过并行总线外扩了128KWSRM和64K的FLASHROM;串行扩展:通过RS-232连接了UART口;通过跳线器可选两个IO口来虚拟I2C总线,并外接带I2C总线的EEPROM和RTC。数据总线地址总线经总线驱动后引出到总线插槽与其他模块相连。模块的译码控制电路由一片CPLD来完成。
上传时间: 2013-11-11
上传用户:maricle
对于传统的跑步机无法联机组网,保存历史数据,实时调试等问题,介绍了一个由多台跑步机通过RS-232串行总线与上位机相连组成的跑步机联网系统。系统采用W77E58作为下位机核心控制器件,它具有双串行通讯端口,其中一个串口用于与变频器通讯,另一个串口则与上位机相连,构成跑步机网络。 Abstract: The traditional running machine can not be connected to a network, saving historical data, real time debug etc.In this paper,a new network system which is composed of running machines connected by a RS-232 communication bus is introduced.In the system,W77E58 is used as a core control unit.W77E58 has two serial ports,one is connected to the inverter and the other is connected to the PC. Thus a network appears.
上传时间: 2014-12-27
上传用户:哇哇哇哇哇
介绍了基于单片机航空交流电参数测试仪的系统设计。以Silicon Labs公司的C8051F005单片机为核心设计出数据采集板,通过RS-232串口与上位机通讯。运用Lab Windows/CVI编写的上位机软件实现信号的检测以及波形和数据的显示,给出了测试仪硬件电路的组成和软件流程图。本系统具有硬件结构简单、容易实现和成本低等特点,在实际应用中其稳定性、精确性均能满足客户要求。 Abstract: The design of aeronautics AC parameters tester based on the single-chip is introduced.The core component of data acquisition board is C8051F005 single chip of Silicon Labs Company,and communication with PC through RS-232. The signal processing software programmed with LabWindows/CVI can be used successfully to fulfill inspection of signal and display of the waveform and data. The hardware and software configuration of test instrument are provided.The hardware of the system is simple, and can be easily realized.The stability and precision of the measurement instrument are enough to meet the requirements.
上传时间: 2013-11-18
上传用户:wang5829
主要介绍构成记忆示波器的STC12C5408AD增强型单片机8通道10位模数转换功能的设置、应用和具体的汇编程序设计,以及PC机串行通讯和图形显示的高速汇编程序的设计要点,并列举实例说明其应用效果。 Abstract: The configuration, applications and the designs for? compiling program of the memorial oscillograph of 10 bits A/D conversation are introduced. It’s bases on STC12C5408AD 8? channels? single-chip? computer? in? enhancement? mode. It also recommends the devising essentials of high speed compiling program for PC serial communication and graphics display, lists examples to explain its effects in using.
上传时间: 2013-10-10
上传用户:adada
介绍了基于单片机C8051F020的通用串口适配器的设计与实现方法,即由单片机控制的智能化一对多口收发信号转换器。通过采用C51对单片机进行编程,控制与RS-232(标准RS-232电平)、RS232(TTL电平)、RS-422接口的数据通信;采用C++ Builder作为开发平台,通过RS-232接口实现上位机对适配器各个通信端口的控制。 Abstract: Design and realization of a universal serial port adapter based on the MCU C8051F020 are introduced.The adapter is an intelligent one-to-more receiving and transmitting signal converter controlled by the MCU. By programming the MCU with the language C51,MCU control data communication between the MCU and RS-232(RS-232 level),RS-232(TTL level),RS-422 port; Using C++ Builder as the development plane, by one RS232 port, the upper PC can control each of the communication port of the adapter.
上传时间: 2013-11-19
上传用户:hebanlian
摘要:介绍了采取专用电平转换芯片MAX232实现PC机与MCS51单片机之间的串行通信的方法.通过对系统的通信方式选择89C51通信波特率的设置、通信的设置,以及对接口电路的软件和硬件的设计分析,展示了该电路的实用性.关键词:微处理器;PC机;串行通信;RS-232接口;MAX232芯片
上传时间: 2014-01-22
上传用户:shizhanincc
计算机的串行口与控制 单片机串行口除用作单片机之间串行通信的通道外,还能和普通计算机的RS-232口(串口)进行通信。 这是单片机的一大特色,使得它在通信与控制领域得到广泛的应用。 本部分从一些基础的RS-232标准谈起,并结合一些串口基础实验加深对知识的理解。最后,讲解如何用Visual Basic语言编写一个简单的串口通信程序。
上传时间: 2014-01-12
上传用户:siguazgb
摘要:“网络通”是基于普通单片机的廉价以太网测控网关。它可以将具有RS-232、RS-485等接口的测控设备简单而且直接地连接在以太网(因特网)上,利用丰富的现成的以太网资源,组成一系列以太网的分布式测控系统。关键词:以太网分布式测控系统 以太网测控网关 网关 网络通
上传时间: 2014-12-27
上传用户:xg262122