首先研究CAN總線和SAE J1939協(xié)議，提出一種基于MC9S12HZ256微控制器的總線式汽車數(shù)字儀表解決方案。詳細介紹SAE J1939協(xié)議的報文幀格式及應(yīng)用層協(xié)議中發(fā)動機相關(guān)參數(shù)的定義，以及步進電機及其驅(qū)動和車速信號的處理方法。該數(shù)字儀表系統(tǒng)硬件平臺由微處理器和信號采集和信息處理及顯示等模塊組成。軟件設(shè)計部分編程實現(xiàn)了對CAN總線和各傳感器數(shù)據(jù)的讀取、處理。該系統(tǒng)能夠?qū)崟r反映車輛工況。 Abstract: In this paper，CAN bus and SAE J1939protocol are researched，and a vehicle digital instrument solution based on MC9S12HZ256MCU is proposed.The message frame format and SOME engine-related parameters’definition in SAE J1939application layer protocol are introduced in detail.Stepper motor and its driver，the methods of speed signal process-ing are also introduced.The hardware platform of vehicle digital instrument is composed by MCU，signal acquisition mod-ule，and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accom-plished by programming，and vehicle condition can be reflected in real-time.
上傳時間： 2013-10-20
上傳用戶：huannan88
設(shè)計一種基于AT89C52的語音錄放系統(tǒng)，利用單片機、ISD2560語音錄放器件、麥克風、揚聲器等元器件實現(xiàn)硬件電路的設(shè)計，并利用C51高級語言設(shè)計ISD2560器件控制字的寫入和定時中斷程序。經(jīng)軟硬件調(diào)試，結(jié)果表明該系統(tǒng)錄放效果良好，具有一定的工程實用價值。 Abstract: Voice recording and playback system based on AT89C52is designed in this paper.Using the single-chip microcomputer，voice recording and playback chip ISD2560，microphone and speaker to realize the hardware circuit design.Writing ISD2560control words and timing interrupt procedures are designed by C51advanced language.Through the hardware and software test,voice recording and playback system play better voice,and this system has SOME engineering practical values.
上傳時間： 2013-10-20
上傳用戶：ywcftc277
飛機電網(wǎng)故障時，機載電氣盒必須在延遲時間內(nèi)切斷電網(wǎng)，保護機載設(shè)備。采用AT89S52設(shè)計的電氣盒測試儀能夠測試電氣盒保護功能，測量延遲時間。實際應(yīng)用結(jié)果表明，該測試儀具有測量準確、可靠性高、成本低等優(yōu)點。 Abstract: The helicopter-electrical-box must shut off the helicopter power，protect the equipments of the helicopter when the helicopter power is failed.The tester for the helicopter-electrical-box based on AT89S52is used for testing the protect-ing function and measuring the delay time.Application results show this tester has SOME advantages,such as accurate mea-surement,high dependability,economical cost etc.
上傳時間： 2014-12-27
上傳用戶：786334970
介紹一種多功能音樂播放器，它是以AT89S52單片機為核心，并輔有一些外圍器件，采用匯編語言編寫程序，實現(xiàn)多功能音樂播放，歌曲自動循環(huán)播放和使用琴鍵自編曲目功能。此外，彩燈顯示歌曲節(jié)奏，按鍵跳轉(zhuǎn)到喜愛曲目，液晶顯示當前播英文曲目。并給出了系統(tǒng)軟硬件設(shè)計。 Abstract: It introduces a multifunctional music player,taking AT89S52 single-chip microcomputer as hardware control core and using SOME peripheral elements.Programmes are compiled in assembly language to act as expected.There are two functional modes in this system.One is to make the music play automatically and consecutively,the other is to compose new songs through keys.In addition,lights show the pace of music and the English names can be displayed in the liquid crystal screen.With perfect combination of hardware and software,the music player can meet many music lovers’needs for multifunctional music player.And the hardware and software of the system are given.
上傳時間： 2013-11-18
上傳用戶：xiaodu1124
從系統(tǒng)硬件設(shè)計和軟件構(gòu)成上，介紹一種以AT89C52單片機為核心,通過無線遙控方法實現(xiàn)對預(yù)設(shè)電話自動撥號報警的智能呼救系統(tǒng)。系統(tǒng)提供了患者在緊急情況下無法使用電話報警時的一種報警手段。由用戶預(yù)設(shè)的多組電話號碼作為語音報警對象,預(yù)錄可長達20 s的語音信號來說明患者所處地點及病情，并通知患者家人。 Abstract: This paper introduces a intelligent alarming system which is realized by wireless remote control system.This system chiefly consists of AT89C51 the system can processor.User can input several groups of telephone number regarded as alarming objects,The system can record SOME information 20 seconds to tell the site of the patient.And notice the rokonok of the patient.
上傳時間： 2013-11-19
上傳用戶：wd450412225
Mega16是一款采用先進RISC精簡指令，內(nèi)置A/D的8位單片機，可支持低電壓聯(lián)機 Flash和EEPROM 寫入功能；同時還支持 Basic和C 等高級語言編程。用它設(shè)計電子時鐘不僅成本低，硬件簡單，而且很容易實現(xiàn)系統(tǒng)移植。介紹了如何利用AVR系列單片機Mega16及1602字符液晶來設(shè)計電子時鐘的方法，同時給出了相應(yīng)的電路原理及部分語言程序。 Abstract: ?Mega16 is a high-performance, low power consumption, the use of advanced RISC concise instructions, built-in A/D 8-bit microcontrollers, the on-line support for low-voltage Flash, EEPROM write function. Except Mega16 also support the Basic, C, and other high-level language programming.The electronic clock which is deisgned by Mega16 is not only low-cost, simple hardware, but easy to achieve system migration.The design method of electrioic clock based on the AVR Mega16 and character LCD1602 is introduced in this paper,and the corresponding circuit electrionic and SOME language program are given.
上傳時間： 2014-12-27
上傳用戶：zl5712176
在介紹基于MSP430單片機的指紋保險柜工作原理的基礎(chǔ)上，從系統(tǒng)軟件設(shè)計的角度出發(fā)，詳細介紹了指紋保險柜軟件的總體分析過程、程序結(jié)構(gòu)的設(shè)計以及代碼的編寫，給出了按鍵管理流程和部分源代碼。 Abstract: On basis of the operating principle of MSP430 microcontroller-based fingerprint safe,the general analyzing process,program designing and code compiling of the fingerprint safe software are introduced mainly,and the key-press flows chart and SOME codes according to the system software designing are put forward.
上傳時間： 2014-12-27
上傳用戶：gaojiao1999
<Almost since the introduction of microcontrollers as electronic components there always has been an oscillatorcircuit on the device to make it work. From application point of view only SOME external components wererequired to make it work. However, to make sure that it will always work required more effort. This report is basedon feedback from the market from customers applying 8-bit mircrocontrollers.>
標簽： oscillators X-tal bit mic
上傳時間： 2013-11-12
上傳用戶：穿著衣服的大衛(wèi)
Luminary Micro provides an analog-to-digital converter (ADC) module on SOME members of theStellaris microcontroller family. The hardware resolution of the ADC is 10 bits; however, due to noiseand other accuracy-diminishing factors, the true accuracy is less than 10 bits. This application noteprovides a software-based oversampling technique, resulting in an improved Effective Number OfBits (ENOB) in the conversion result. This document describes methods of oversampling an inputsignal, and the impact on precision and overall system performance.
標簽： Oversampling Techniques ADC fo
上傳時間： 2013-12-17
上傳用戶：zhyiroy
基于PIC單片機的低功耗讀卡器硬件設(shè)計:本文提出了一個完整的基于串口的智能讀卡器子系統(tǒng)設(shè)計方案并將其實現(xiàn)。讀卡器的設(shè)計突出了小型化的要求，全部器件使用貼片封裝。為了減小讀卡器的體積，設(shè)計中還使用了串口竊電的技術(shù)，使用串口信號線直接給讀卡器供電。為此，讀卡器使用了省電的設(shè)計，采用了省電的集成電路，并大膽簡化了許多傳統(tǒng)的設(shè)計電路。關(guān)鍵字： 讀卡器， 單片機， 串口竊電 Abstract： This paper aims to put forward a complete design of Smart IC card reader based onSerial Port and propose the way of realizing it for the purpose of Network Security. SMD isadopted to make Smart IC reader smaller in this design. To reduce the volume of Smart ICreader， Serial Port powered technology is employed to get power from the signal line of Serial Port. For this reason， low-power consumption components are adopted in the design and SOME traditional designs are simplified to reduce the power consumption.Keywords： Card Reader； Single-chip Computer； Serial Port Powered IC 卡系統(tǒng)保存了加密算法所需要的工作密鑰，供加密算法對網(wǎng)絡(luò)上傳輸?shù)臄?shù)據(jù)加密使用，是整個系統(tǒng)網(wǎng)絡(luò)安全的核心。在IC 卡子系統(tǒng)中，讀卡器是一個重要的部分。它起著管理IC卡、在IC 卡和PC或網(wǎng)絡(luò)計算機間傳遞數(shù)據(jù)的重要作用。本文以一片PIC單片機為核心完成了基于RS232 串口的讀卡器的硬件設(shè)計。
上傳時間： 2014-04-14
上傳用戶：wanghui2438
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
