摘要! 就如何使用单片机对旋转增量编码器鉴相进行了研究! 给出了常用的鉴相算法以及识 别"毛刺#的方法!并通过在!AVR单片机上编程验证了所给出的鉴相方法$ 更多编码器知识请访问http://www.elecfans.com/zhuanti/20111111242149.html
上传时间: 2013-11-16
上传用户:wojiaohs
学习单片机离不开实验,以往单片机的实验往往依赖于仿真机和单片机学习系统,价格昂贵,初学者很难配备。近年来,随着FLASH型单片机的广泛应用,采用软件模拟加写片验证成为一种经济实用的实验方法,以AT89C51单片机为例,其价格不足¥10RMB,而擦、写次数可以有1000次,一块芯片即可做上千次的实验。 目前,流行的单片机开发软件Keil可以免费获得用于学习的EVAL版;编程器价格并不昂贵,专门用于写89C51类芯片的编程器价格更低廉(不足百元),而且编程器也是以后开发单片机所必备的工具;相比之下,用于实验的电路板制作比较麻烦,用万用板搭接,只能做些很简单的电路,稍复杂的电路一般要用到双面板,而业余条件下是很难自制双面板的,而且实验电路板主要是用于学习,学完了,也就没有什么使用价值了,所以很多人希望能够廉价地获得。
上传时间: 2013-12-11
上传用户:fac1003
MMC/SD卡以其优越的性能,在单片机嵌入式设备中得到广泛应用。将MMC/SD卡作为外部掉电存储介质应用于音频信号发生器中,通过8051F330单片机上的SPI接口,实现单片机—MMC/SD卡的存储扩展,设计了此硬件平台上的MMC/SD卡的单片机驱动程序,并给出了相应的程序代码,满足音频信号发生器的大容量存储要求。 Abstract: MMC/SD card is more and more widely used in the single chip embedded devices for their excellent performances.This article introduces the application of MMC/SD card as the external power down storage medium in audio signal generator. The extension technology especially for storage of single chip-MMC/SD card via SPI interfaces in 8051F330 single chip, including designs single chip drive program of MMC/SD card based on hardware platform,and also gives the key coding of the program. The implementation of big capacity storage is meaningful in audio signal generator.
上传时间: 2014-12-27
上传用户:黄华强
介绍一种无极可调交流电子负载设计的新方法,由ATmega48单片机输出PWM波,通过上位机设定不同的占空比控制场效应管的通断时间,即改变流过场效应管的平均电流。根据电流的大小,可以等效为相应的负载,并将采集的电流值显示在上位机上。文中对该系统的软﹑硬件设计思路作了详细的分析,阐述了其设计原理。 Abstract: A new type electronic load is introduced.Due to ATmega48 microcomputer output PWM wave.The different duty is set ratio through PC to control FET turn-on time.We can equivalent homologous load according the current and display the current at PC.The hardware and software designing are analysed in detail. The principle is explained and the output is also given.
上传时间: 2013-11-23
上传用户:虫虫虫虫虫虫
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
详细介绍了TLC1549系列模数转换器的特点及工作原理,然后根据TLC1549的工作时序和A/D转换原理针对实际问题编写了详细的汇编语言程序。 Abstract: A basic principle and characteristic of TLC1549 analog-to-digital converter are introduced? detailedly in this article.Through engineering-oriented illustration,a microcomputer programmer base on basic principle and time sequence of TLC1549 is writted.
上传时间: 2014-07-16
上传用户:blans
以FPGA为数字逻辑平台,借助继电器矩阵和多路模拟开关,以ADS1211为核心,在单片机控制下,联合实现手持式虚拟/智能存储示波表中数字多用表功能,实验表明该设计是行之有效的。文中介绍了数字多用表的系统结构,重点讨论了其测量电路和智能控制方案。 Abstract: The digital multimeter in virtual/intellect digital-oscillorgaph was fulfilled, which was controlled by singlechip computer by relay matrix and analogue switches,in which FPGA was used for digital logical plot-form, ADS1211 for kernel chip, the experiment showed the design was feasible, the system struction was present-ed in the paper, measure circuit and intellect control plan of digital multimeter were mainly given.
上传时间: 2013-11-02
上传用户:瓦力瓦力hong
P89LPC932是Philips公司推出的高性价比单片机,该器件内含增强型CPU,同一工作频率下的速度为标准80C51单片机的6倍。文中介绍了P89LPC932的主要特点,给出了基于P89LPC932的车辆数据采集系统的组成框图。 Abstract: The Philips P89LPC932 is a high cost-effective 8051-based microcontroller.High performance 2-clock 80C51 CPU providing 6 times the preformance of the standard 80C51.The main characteristic of P89LPC932? and its application in vehicle data collection system are given.
上传时间: 2013-10-28
上传用户:gyq
WTS701是华邦公司推出的内建喇叭驱动功能的“文字转发音”单芯片集成电路。该芯片将连续运算法与华邦专有的多层次储存技术相结合,从而实现了真正将“文字转发音”的完整功能。文中介绍了该芯片的原理及典型应用,给出了Cygnal F120 MPU与WTS701 的接口电路,并根据相应的芯片指令给出了其控制软件的代码程序。 Abstract: WTS701 is really a single chip on “text-to-speech” produced by Winbond company building-in algorithm with the company's patented multi-level storageMLS technology熏 different from other chips that “text-to-speech” on the market at present. The principle and typical application of this chip are introduced in this article the interface circuit of Cygnal F120 MPU and WTS701 is presented. The corresponding? control software is provided.
上传时间: 2013-10-08
上传用户:旗鱼旗鱼
DS1991是一种多密钥信息纽扣,文章介绍了DS1991的主要特点、工作原理及读写方法。给出了一种基于DS1991和PIC单片机的智能水卡设计方案,同时给出了整个系统的硬件组成原理和软件设计方法。 Abstract: DS1991 is a multikey iButton. The characteristic operation principle and the way of read/write of DS1991 are introduced in the paper. A smart water card based on DS1991 and PIC singlechip is presented the design of hardware and software are also given
上传时间: 2013-11-06
上传用户:李彦东