介紹了一種TI公司最新推出的MSP430F247單片機，利用它自帶的I2C模塊驅(qū)動I2C總線的溫度傳感器TMP275。TMP275是一款具有高精度、低功耗的新型溫度傳感器。由于TMP275具有可編程功能，纖小的封裝以及極大的溫度范圍，因而廣泛應(yīng)用于組建超小型溫度測量裝置。 Abstract: A new single CHip microcomputer MSP430F247 which is released by TI is introduced.It can drive I2C interface digital temperature sensor TMP275 with I2C module.TMP275 is a new temperature sensor which has high accurate,low power. Because TMP275 has programmable function,small packages and wide temperature range,it is applied widely in very little temperature measurment equipment.
上傳時間： 2013-12-06
上傳用戶：asdfasdfd
介紹了一種基于C8051F020單片機的多路壓力測量儀。該測量儀選用電阻應(yīng)變式壓力傳感器采集壓力信號，并經(jīng)放大電路處理后送入C8051F020單片機，再由C8051F020單片機內(nèi)部的A/D轉(zhuǎn)換器將采集到的壓力信號進行模數(shù)轉(zhuǎn)化，然后分別對數(shù)據(jù)進行存儲和顯示。該測量儀能測量6路壓力信號，并且各測量點都能單獨檢測和設(shè)置。由于采用了C8051F020單片機，簡化了硬件電路，增強了抗干擾能力，使得測量儀具有測量精度高，沖擊小等特點。 Abstract: A measurement apparatus for multi-channel pressure based on single CHip microcomputer is introduced.It can measure 6 channels signal of the pressure，and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors，the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally，and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple，and it also enhanced the anti-interference ability.It features high precision and little impact.
上傳時間： 2013-11-16
上傳用戶：yare
摘要：隨著住宅小區(qū)規(guī)模的不斷擴大，小區(qū)的防火報警功能顯得越來越重要。就此研制了基于MSC1211單片機的防火報警網(wǎng)絡(luò)系統(tǒng)。該系統(tǒng)在各個火警布控點設(shè)置了獨立的監(jiān)控設(shè)備，并通過INTERNET網(wǎng)交換信息。詳細介紹了系統(tǒng)硬件結(jié)構(gòu)和軟件設(shè)計，同時給出了電路原理圖和程序流程圖。實際運行證明：系統(tǒng)可靠性高、反應(yīng)靈敏、工作速度快，具有很好的實用價值。 關(guān)鍵詞：傳感器 防火報警 監(jiān)控節(jié)點 控制中心節(jié)點
標(biāo)簽： SINGLE-CHip MICROPROCE 1211 MSC
上傳時間： 2013-10-11
上傳用戶：xaijhqx
CANopen主節(jié)點除具備CANopen設(shè)備的基本條件外，還需具備NMTMaster的功能，即對CANopen網(wǎng)絡(luò)進行管理。對CANopen主節(jié)點的實現(xiàn)提出三種方案：方案1：在CANopen-CHip基礎(chǔ)上開發(fā)CANopen主站。方案2：通過對CANopen協(xié)議棧源代碼的二次開發(fā)在單片機上實現(xiàn)嵌入式CANopen主站。方案3：利用CANopenMasterAPI在PC機上實現(xiàn)CANopen主節(jié)點。
標(biāo)簽： CANopen 主節(jié)點 設(shè)計方案
上傳時間： 2013-11-02
上傳用戶：luke5347
介紹一種采用單片機技術(shù)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(tǒng)框架進行說明，然后介紹主要功能模塊的設(shè)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(shù)和功能原理，最后描述了該系統(tǒng)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
氣壓是氣象監(jiān)測中的一個重要參數(shù)，提出了一種氣壓數(shù)據(jù)采集模塊設(shè)計方案，該模塊采用數(shù)字氣壓傳感器MS5534B、MSP430單片機MSP430F2272和帶實時時鐘（RTC）64 KB鐵電存儲器。通過低功耗軟件設(shè)計方法以微安級整體平均功耗實現(xiàn)了氣壓數(shù)據(jù)的采集和存儲，適合電池供電的連續(xù)高精度氣壓采集應(yīng)用。給出了模塊的軟硬件設(shè)計以及MS5534B的性能指標(biāo)和使用經(jīng)驗。 Abstract: Air pressure is an important parameter in weather monitor.This paper futs forward a new design scheme of low power-air pressure data acquisition module.The module uses a digital output barometer sensor MS5534B,MSP430 microcontroller MSP430F2272 and integrated RTC 64KB FRAM,precision air pressure measurement and storage CHip.Another point of this module is low power consumption, so it is well suited for battery powered air pressure data acquisition applications. At the same time,the software and hardware deign of module is presented,And the speciaties and use notices of MS5534B are given.
上傳時間： 2014-12-27
上傳用戶：drink！
MMC/SD卡以其優(yōu)越的性能，在單片機嵌入式設(shè)備中得到廣泛應(yīng)用。將MMC/SD卡作為外部掉電存儲介質(zhì)應(yīng)用于音頻信號發(fā)生器中，通過8051F330單片機上的SPI接口，實現(xiàn)單片機—MMC/SD卡的存儲擴展，設(shè)計了此硬件平臺上的MMC/SD卡的單片機驅(qū)動程序，并給出了相應(yīng)的程序代碼，滿足音頻信號發(fā)生器的大容量存儲要求。 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.
標(biāo)簽： 8051F330 音頻信號 發(fā)生器
上傳時間： 2014-12-27
上傳用戶：黃華強
針對眾多低成本數(shù)據(jù)采集需求，采用帶有片上USB控制器和D/A轉(zhuǎn)換器的混合信號微處理器C8051F340，設(shè)計了一款可通過USB接口和LabVIEW圖形用戶界面實現(xiàn)與PC機聯(lián)機的數(shù)據(jù)采集器，同時借助系統(tǒng)的SD卡存儲獨立實現(xiàn)現(xiàn)場長時間采集數(shù)據(jù)。該數(shù)據(jù)采集器成本低，結(jié)構(gòu)簡單，體積小，已成功用于工業(yè)現(xiàn)場。 Abstract: Aiming at the need of low cost data acquisition, a data acquisition device is designed based on C8051F340 which is a mixed-signal microcontroller and integrates USB controller and A/D controller on a CHip.The data acquisition device which can combine with PC by USB interface and LabVIEW graphical user interface,can realize data acquisition. At the same time,it can be solely run a long time in virtue of SD card in field.The date aequisition device features low cost,simple structure and little sharp, and it has been used in industry field.
標(biāo)簽： C8051F340 數(shù)據(jù) 集器設(shè)計
上傳時間： 2014-05-31
上傳用戶：1109003457
為了解決磁放大器性能測試過程中，需要對其供給不同數(shù)值恒定電流的問題，設(shè)計了一種基于DAC7512和單片機的數(shù)控恒流源系統(tǒng)。該系統(tǒng)采用AT89C51作為主控器件，將計算機發(fā)送的電流控制字命令轉(zhuǎn)換為D/A轉(zhuǎn)換器控制字，通過模擬SPI通信接口，寫D/A控制字到DAC7512，從而控制其輸出相應(yīng)數(shù)字電壓值，經(jīng)差動縮放電路、電壓/電路變換電路和功率驅(qū)動電路，最后輸出恒定電流。實驗結(jié)果表明，恒流源輸出電流調(diào)節(jié)范圍為-45~+45 mA、精度為±0.1 mA，分辨率達0.024 4 mA，具有應(yīng)用靈活，外圍電路簡單，可靠性高的特點。該數(shù)控直流恒流源也可為相關(guān)產(chǎn)品的測試系統(tǒng)研發(fā)提供參考。 Abstract: In order to solve the need to supply different values constant current for the magnetic amplifier in testing process， numerical control constant current source system was designed based on DAC7512 CHip and microcontroller technology. The system used the AT89C51 as the main CHip， which can convert the current control word from computer into to D/A control words. And the system wrote D/A control word into the DAC7512 CHip to control the output voltage value by the SPI communication interface， which can output corresponding constant current figures by scaling circuit， the V/I converter and power drive circuit. Experimental results show that the current source output current adjustment range is -45~+45mA， accuracy is ± 0.1mA， and resolution ratio is 0.024 4mA
標(biāo)簽： 7512 DAC 數(shù)控直流 恒流源
上傳時間： 2014-12-27
上傳用戶：invtnewer
提出了一種基于C8051F320的列車安全巡檢儀的設(shè)計方案，詳細闡述了巡檢儀的各個模塊的硬、軟件設(shè)計。巡檢儀集信息采集、軸溫檢測、照明和記錄存儲等功能于一體，實現(xiàn)了對列車安全巡檢工作有效的監(jiān)督和科學(xué)管理。系統(tǒng)軟件采用C51編寫，對單片機進行有效的電源管理，保證了巡檢儀的穩(wěn)定性、可靠性和低功耗性。 Abstract: This paper puts forward a design of train safety inspection based on C8051F320,describes all modules hardware and software design of inspection instrument.The inspection instrument has the function of information collection, axle’s temperature detection, lighting and records storage.It can supervise and administer train safety inspection work effectively.The system software using C51 can manage the power of single CHip microcomputer, and guarantee the stability, reliability and low power consumption of the inspection instrument.
標(biāo)簽： C8051F320 列車 儀的設(shè)計 巡檢
上傳時間： 2013-12-22
上傳用戶：落花無痕
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