介紹一種采用單片機技術和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對整個系統框架進行說明，然后介紹主要功能模塊的設計，給出了各模塊的原理圖。重點描述了基站器件EM4095的性能參數和功能原理，最后描述了該系統的主程序流程圖。 Abstract: In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At first，the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in DETAIL. At last，the main software flow is given
上傳時間： 2013-10-18
上傳用戶：windypsm
介紹一種無極可調交流電子負載設計的新方法，由ATmega48單片機輸出PWM波，通過上位機設定不同的占空比控制場效應管的通斷時間，即改變流過場效應管的平均電流。根據電流的大小，可以等效為相應的負載，并將采集的電流值顯示在上位機上。文中對該系統的軟﹑硬件設計思路作了詳細的分析，闡述了其設計原理。 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.
上傳時間： 2013-11-23
上傳用戶：蟲蟲蟲蟲蟲蟲
介紹一種應用于長城賽弗SUV汽車后門車窗多功能控制器，能實現對電動玻璃車窗、車窗雨刮器、噴水器以及電加熱除霜器等控制。介紹了基于NXP P89LPC922單片機多功能汽車后車窗控制器的控制功能、硬件電路原理和軟件設計方法。 Abstract: This paper presents a multipurpose automotive rear windows controller for CHANGCHENG SAFE SUV.The controller can control rear power-operated window,rear wiping,washing water pump and rear defroster of the windows. In this paper, it is introduced in DETAIL that the functions and the design of the circuit and program of the controller based on NXP P89LPC922 MCU.
上傳時間： 2013-11-13
上傳用戶：z754970244
介紹基于ATmega8型單片機的溫度測量及加熱控制系統。分析系統的工作原理，詳盡討論系統的硬件電路和軟件流程。實驗證明，該系統工作可靠，穩定性高。 Abstract: The new temperature measuring and heating control system based on ATmega8 MCU is introduced.The system’s working principles is analyzed.The design principles of hardware and software are also discussed in DETAIL.This system has been testified and it works steady and reliably.
上傳時間： 2013-11-21
上傳用戶：caiguoqing
介紹以P87LPC764型單片機為核心的延時型漏電繼電器設計方案。該方案可供用戶選擇實現額定動作電流和5倍額定動作電流下不同的延時動作時間，并有重合閘設定選擇功能。解決了以往傳統分立元件帶來的延時時間離散性大且不易實現的弊端。 Abstract: In this paper, the delay leakage relay based on P87LPC764 is introduced in DETAIL. This system provides different relay times at rating current and 5× rating current for users and also offers superposition brake set selection function. So that it resolves many traditional problems.
上傳時間： 2013-11-08
上傳用戶：zhaiye
針對當前安檢力學試驗機所能完成的試驗種類單一、自動化程度低等問題，提出一種以ATmega128單片機為核心控制器的安檢力學試驗機的設計。詳細闡述了該安檢力學試驗機各個組成部分的設計原理和方案，并且給出了各部分的軟件設計思想和操作流程。經過大量測試試驗表明：設計的安檢力學試驗機可以完成多達十余種的力學安檢試驗，完全符合相關國家標準，并且具有數據采集精度高、傳輸速度快、操作安全簡便等特點，實現了安檢設備的多功能化、數字化和自動化。 Abstract: Currently， many mechanical security testing machines have only one function. The degree of automation of them is low. To solve those problems， a new kind of mechanical security testing machine， using ATmega128 micro-controller as its core controller， has been advanced. It describes the components of the machine. The principles and the scheme in the designing processes are presented in DETAIL， and the software architecture and the operation processes of each part are given. After having done many testing， we have reached the following conclusions: the mechanical security testing machine presented can do over ten mechanical security tests complying with related national standards. It has high data acquisition accuracy and high transmission speed. The operation of the machine is simple and safe. In general， this machine is a multi-functional， highly automatic， digitalized security testing device.
上傳時間： 2013-11-05
上傳用戶：a67818601
本文介紹了一種基于單片機的健身車轉速測量系統。該系統具有電路簡單、使用方便等特點。文中詳細介紹了該系統的工作原理,并且給出了它的硬件原理圖和軟件設計程序框圖。關鍵詞:轉速 單片機 測量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in DETAIL in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
上傳時間： 2013-11-02
上傳用戶：源弋弋
基于LabVIEW和單片機的空調溫度場測量系統的研究:室內溫度是空調系統舒適性的重要指標,對其及時、準確地測量顯得非常重要。介紹單片機AT89C51 和數字式、單總線型溫度傳感器DS18B20 組成矩形測量網絡采集空調室內40 點溫度,LabVIEW作為開發平臺,二者之間通過串口實現數據通信,利用LabVIEW強大的數據處理和顯示功能對采集的空調溫度場數據進行實時處理、分析和顯示,詳細介紹了系統的硬件結構和軟件模塊的設計方案。關鍵詞:單片機;DS18B20 ;LabVIEW;串行通信 Abstract : Temperature is a very important criterion of air condition system′s comfort , so it is very significant to measure it accurately and real timely. This paper int roduces a data acquisition system of measuring 40 point s temperature for air condition room based on single wire digital sensor DS18B20 and microcont roller AT89C51 which are composed of rectangle measuring meshwork. The data communication between LabVIEW and microcont roller is executed via serial port ,and the temperature field data of air condition room are processed analyzed and displayed on LabVIEW. The hardware and software modules are also given in DETAIL.Keywords : single chip ;DS18B20 ;LabVIEW; serial communication
上傳時間： 2014-05-05
上傳用戶：KSLYZ
Internal Interrupts are used to respond to asynchronous requests from a certain part of themicrocontroller that needs to be serviced. Each peripheral in the TriCore as well as theBus Control Unit, the Debug Unit, the Peripheral Control Processor (PCP) and the CPUitself can generate an Interrupt Request.So what is an external Interrupt?An external Interrupt is something alike as the internal Interrupt. The difference is that anexternal Interrupt request is caused by an external event. Normally this would be a pulseon Port0 or Port1, but it can be even a signal from the input buffer of the SSC, indicatingthat a service is requested.The User’s Manual does not explain this aspect in DETAIL so this ApNote will explain themost common form of an external Interrupt request. This ApNote will show that there is aneasy way to react on a pulse on Port0 or Port1 and to create with this impulse an InterruptService Request. Later in the second part of the document, you can find hints on how todebounce impulses to enable the use of a simple switch as the input device.Note: You will find additional information on how to setup the Interrupt System in theApNote “First steps through the TriCore Interrupt System” (AP3222xx)1. It would gobeyond the scope of this document to explain this here, but you will find selfexplanatoryexamples later on.
上傳時間： 2013-10-27
上傳用戶：zhangyigenius
Express Mode uses an 8-bit wide bus path for fast configuration of Xilinx FPGAs. Thisapplication note provides information on how to perform Express configuration specifically forthe Spartan™-XL family. The Express mode signals and their associated timing are defined.The steps of Express configuration are described in DETAIL, followed by DETAILed instructions thatshow how to implement the configuration circui
標簽： Spartan-XL Express XAPP FPGA
上傳時間： 2014-12-28
上傳用戶：hewenzhi
