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Abstract

Abstract修飾符可以用于類、方法、事件和索引指示器(indexer),表示其為抽象成員,抽象方法是沒有方法體的方法。抽象成員,即抽象類、抽象方法、抽象事件。
  • 基于P87LPC764單片機的延時漏電繼電器設計

    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(xiàn)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(tǒng)分立元件帶來的延時時間離散性大且不易實現(xiàn)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.

    標簽: P87 764 LPC 87

    上傳時間: 2013-11-08

    上傳用戶:zhaiye

  • 基于P87C591的信號采集節(jié)點的設計

    介紹了CAN總線和P87C591單片機的特點,給出了基于P87C591單片機的信號采集節(jié)點的軟、硬件設計,指出了硬件電路設計中應注意的問題,在軟件設計中重點介紹了節(jié)點初始化、報文發(fā)送和報文接收等子程序。 Abstract:  The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.

    標簽: P87C591 信號采集 節(jié)點

    上傳時間: 2013-11-03

    上傳用戶:BIBI

  • SAM8系列S3C825A型單片機軟件設計

    以S3C825A為例介紹三星公司SAM8系列單片機的內(nèi)部結(jié)構(gòu)及其軟件開發(fā)環(huán)境,詳細描述采用混合編程法來對SAM8系列單片機進行軟件設計的一般方法,最后給出用混合編程法對S3C825A進行軟件設計的具體應用實例。 Abstract:  With S3C825A,this paper firstly introduces the SAM8 series single-chip microcontrollers and their software development environment, then introduces mixed programming technology for SAM8 series single-chip microcontrollers. In the end, the application program is also given.

    標簽: S3C825A SAM8 單片機 軟件設計

    上傳時間: 2013-12-09

    上傳用戶:ZZJ886

  • 基于C8051F系列單片機的無線收發(fā)電路設計

    基于幅移鍵控技術(shù)ASK(Amplitude-Shift Keying),以C8051F340單片機作為監(jiān)測終端控制器,C8051F330D單片機作為探測節(jié)點控制器,采用半雙工的通信方式,通過監(jiān)控終端和探測節(jié)點的無線收發(fā)電路,實現(xiàn)數(shù)據(jù)的雙向無線傳輸。收發(fā)電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線,天線直徑為(3.4±0.3)cm。試驗表明,探測節(jié)點與監(jiān)測終端的通信距離為24 cm,通過橋接方式,節(jié)點收發(fā)功率為102 mW時,節(jié)點間的通信距離可達20 cm。與傳統(tǒng)無線收發(fā)模塊相比,該無線收發(fā)電路在受體積、功耗、成本限制的場合有廣闊的應用前景。 Abstract:  Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller, using half-duplex communication mode, this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter (3.4±0.3) cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm,the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules, the circuit has wide application prospect in small size, low cost and low power consumption and other characteristics.

    標簽: C8051F 單片機 無線收發(fā) 電路設計

    上傳時間: 2013-10-19

    上傳用戶:xz85592677

  • 基于單片機與ADS1121的示波器數(shù)字多用表實現(xiàn)

    以FPGA為數(shù)字邏輯平臺,借助繼電器矩陣和多路模擬開關(guān),以ADS1211為核心,在單片機控制下,聯(lián)合實現(xiàn)手持式虛擬/智能存儲示波表中數(shù)字多用表功能,實驗表明該設計是行之有效的。文中介紹了數(shù)字多用表的系統(tǒng)結(jié)構(gòu),重點討論了其測量電路和智能控制方案。   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.

    標簽: 1121 ADS 單片機 示波器

    上傳時間: 2013-11-02

    上傳用戶:瓦力瓦力hong

  • 基于ROM單片機的漢字輸入法的實現(xiàn)

    在需要實時大量輸入漢字的顯示控制處理應用中,利用傳統(tǒng)單片機實現(xiàn)顯示控制的設計方法是較難實現(xiàn)的。帶漢字字庫的液晶模塊的使用使得小容量ROM單片機的大量漢字信息輸入與顯示成為可能。提出了針對漢字字庫編碼的二級索引拼音輸入檢索方法,介紹了以ST7920作為控制器的帶漢字字庫的液晶顯示模塊的接口方法及漢字顯示和控制原理,給出了通用計算機鍵盤在單片機中的串行接口,采用該技術(shù)可大大增強單片機的漢字輸入功能。為小容量ROM單片機的大批量漢字信息處理提供了一種漢字輸入解決方案。 Abstract:  It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.

    標簽: ROM 單片機 漢字輸入法

    上傳時間: 2013-11-19

    上傳用戶:jhksyghr

  • 高性價比單片機P89LPC932及其應用

    P89LPC932是Philips公司推出的高性價比單片機,該器件內(nèi)含增強型CPU,同一工作頻率下的速度為標準80C51單片機的6倍。文中介紹了P89LPC932的主要特點,給出了基于P89LPC932的車輛數(shù)據(jù)采集系統(tǒng)的組成框圖。 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.

    標簽: P89 LPC 932 89

    上傳時間: 2013-10-28

    上傳用戶:gyq

  • 基于MSP430F149的無線環(huán)境監(jiān)測傳感器系統(tǒng)設計

    為了提高環(huán)境參數(shù)采集的自動化水平,提升效率,設計了無線傳感器系統(tǒng)。本系統(tǒng)運用了傳感器技術(shù)、通信技術(shù)和單片機技術(shù),實現(xiàn)了對環(huán)境溫度、濕度、光照度以及可燃性氣體濃度等參數(shù)的檢測。它能夠?qū)崟r地與上位機進行無線通信,滿足對環(huán)境參數(shù)實時監(jiān)測的要求。 Abstract:  In order to increase the degree of automation and improve the efficiency of the environment monitoring parameters,the wireless sensor system was developed.Combining with the technique of sensor,automatic monitoring,communication and single-chip microcomputer,it realized real-time monitoring environment parameters,such as temperature,humidity,illumination,concentration of com- bustible gas and so on.At the same time it can communicate with upper personal computers,satisfy the desire of real-time monitoring.

    標簽: 430F F149 MSP 430

    上傳時間: 2013-11-22

    上傳用戶:longlong12345678

  • 文字轉(zhuǎn)發(fā)音單片處理器WTS701的原理及應用

    WTS701是華邦公司推出的內(nèi)建喇叭驅(qū)動功能的“文字轉(zhuǎn)發(fā)音”單芯片集成電路。該芯片將連續(xù)運算法與華邦專有的多層次儲存技術(shù)相結(jié)合,從而實現(xiàn)了真正將“文字轉(zhuǎn)發(fā)音”的完整功能。文中介紹了該芯片的原理及典型應用,給出了Cygnal F120 MPU與WTS701 的接口電路,并根據(jù)相應的芯片指令給出了其控制軟件的代碼程序。 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.

    標簽: WTS 701 發(fā)音 單片處理

    上傳時間: 2013-10-08

    上傳用戶:旗魚旗魚

  • 基于DS1991和PIC單片機的智能水卡設計

    DS1991是一種多密鑰信息紐扣,文章介紹了DS1991的主要特點、工作原理及讀寫方法。給出了一種基于DS1991和PIC單片機的智能水卡設計方案,同時給出了整個系統(tǒng)的硬件組成原理和軟件設計方法。 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

    標簽: 1991 PIC DS 單片機

    上傳時間: 2013-11-06

    上傳用戶:李彥東

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