通過(guò)對(duì)程控濾波器的理論分析，在研究MAX262的功能和單片機(jī)的SPI總線通信的基礎(chǔ)上，提出了基于MAX262的程控濾波器設(shè)計(jì)方案，設(shè)計(jì)了程控濾波器的軟硬件，并給出了測(cè)試結(jié)果。 Abstract: By analyzing the programmable filter,the paper puts forward a programmable filter system design based on MAS262 on basic of studying MAS262 features and SPI bus communication.Software and hardware of the programmmable filter are designed,and the test result is given.
標(biāo)簽： MAX 262 程控 濾波器設(shè)計(jì)
上傳時(shí)間： 2013-11-15
上傳用戶：wxhwjf
針對(duì)材料試驗(yàn)機(jī)等設(shè)備中要求測(cè)量或控制材料拉伸或壓縮的位移，一般采用光電軸角編碼器檢測(cè)位置信號(hào)，輸出正交編碼脈沖信號(hào)。若采用其他方法檢測(cè)位置信號(hào)，必然導(dǎo)致電路設(shè)計(jì)復(fù)雜，可靠性降低。因此，提出一種基于LS7266R1的電子式萬(wàn)能材料試驗(yàn)機(jī)設(shè)計(jì)方案。給出了試驗(yàn)機(jī)中的控制器工作原理，LS7266R1與單片機(jī)的接口硬件設(shè)計(jì)，以及主程序軟件流程圖。巧妙地把力量傳感器，位移傳感器等機(jī)械運(yùn)動(dòng)狀態(tài)的壓力或拉力以及位置坐標(biāo)，變成了電壓信號(hào)和電脈沖數(shù)字信號(hào)，供A/D測(cè)量和LS7266R1計(jì)數(shù)，從而實(shí)現(xiàn)了獨(dú)立完成材料試驗(yàn)控制或通過(guò)PC機(jī)串口命令完成材料試驗(yàn)控制。 Abstract: Aiming at the requirement that the displacement of the tension and compression always be tested and controlled in the equipement such as material testing machine. The position signal was tested by photoelectric axial angle coder. Therefore， the paper proposes the design of electronic universal testing machine design based on LS7266R1. If the position signal detected by other methods， will inevitably lead to the circuit design complexity， reliability decreased. The work theory of the controller， the hardware interface design between LS7266R1 and single chip， and the flow chart of main program， are presented in this paper. The signal of the compression or tension power and displacement at working， which tested by power sensor and displacement sensor especially， is changed into electric voltage and electric pulse numerical signals. And these signals can be tested by A/D and counted by LS7266R1. Finally the test of the material properties can be controlled by itself， or controlled by the COM command of PC.
上傳時(shí)間： 2013-11-02
上傳用戶：yl1140vista
介紹了MPC555與CS8900A擴(kuò)展以太網(wǎng)的硬件設(shè)計(jì)圖。以NUCLUES PLUS操作系統(tǒng)為基礎(chǔ)，介紹了網(wǎng)卡軟件驅(qū)動(dòng)程序的編制，給出了以太網(wǎng)協(xié)議包嵌入NUCLEUS PLUS操作系統(tǒng)的實(shí)現(xiàn)方法。 Abstract: The Ethernet extension hardware design of MPC555 and CS8900A are introduced,and the software driven program based on NUCLEUS PLUS operation system and the technique that Ethernet protocol embedded in NUCLEUS PLUS real operation system are discussed.
上傳時(shí)間： 2013-10-23
上傳用戶：xiehao13
介紹了基于單片機(jī)航空交流電參數(shù)測(cè)試儀的系統(tǒng)設(shè)計(jì)。以Silicon Labs公司的C8051F005單片機(jī)為核心設(shè)計(jì)出數(shù)據(jù)采集板，通過(guò)RS-232串口與上位機(jī)通訊。運(yùn)用Lab Windows/CVI編寫(xiě)的上位機(jī)軟件實(shí)現(xiàn)信號(hào)的檢測(cè)以及波形和數(shù)據(jù)的顯示，給出了測(cè)試儀硬件電路的組成和軟件流程圖。本系統(tǒng)具有硬件結(jié)構(gòu)簡(jiǎn)單、容易實(shí)現(xiàn)和成本低等特點(diǎn)，在實(shí)際應(yīng)用中其穩(wěn)定性、精確性均能滿足客戶要求。 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.
標(biāo)簽： C8051F005 單片機(jī) 儀的設(shè)計(jì) 參數(shù)測(cè)試
上傳時(shí)間： 2013-11-18
上傳用戶：wang5829
為解決傳統(tǒng)可視倒車(chē)?yán)走_(dá)視頻字符疊加器結(jié)構(gòu)復(fù)雜，可靠性差，成本高昂等問(wèn)題，在可視倒車(chē)?yán)走_(dá)設(shè)計(jì)中采用視頻字符發(fā)生器芯片MAX7456。該芯片集成了所有用于產(chǎn)生用戶定義OSD，并將其插入視頻信號(hào)中所需的全部功能，僅需少量的外圍阻容元件即可正常工作。給出了以MAX7456為核心的可視倒車(chē)?yán)走_(dá)的軟、硬件實(shí)現(xiàn)方案及設(shè)計(jì)實(shí)例。該方案具有電路結(jié)構(gòu)簡(jiǎn)單、價(jià)格低廉、符合人體視覺(jué)習(xí)慣的特點(diǎn)。經(jīng)實(shí)際裝車(chē)測(cè)試，按該方案設(shè)計(jì)的可視倒車(chē)?yán)走_(dá)視場(chǎng)清晰、提示字符醒目、工作可靠，可有效降低駕駛員倒車(chē)時(shí)的工作強(qiáng)度、減少倒車(chē)事故的發(fā)生。 Abstract: A new video and text generation chip，MAX7456，was used in the design of video parking sensor in order to simplify system structure，improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure，lower cost，and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance，which makes the driver easy to see backward and reduces chance of accidents.
標(biāo)簽： 7456 MAX 可視倒車(chē) 中的應(yīng)用
上傳時(shí)間： 2013-12-10
上傳用戶：qiaoyue
針對(duì)船舶氣象儀保障維修而設(shè)計(jì)的船舶氣象儀測(cè)試系統(tǒng)，包括信息處理終端、主儀器檢測(cè)模塊、傳感器檢測(cè)模塊，各個(gè)模塊都采用基于AVR單片機(jī)的嵌入式系統(tǒng)，模塊之間通過(guò)CAN總線進(jìn)行通信。結(jié)果表明，船舶氣象儀測(cè)試系統(tǒng)能夠快速檢測(cè)船舶氣象儀故障，與單純依靠人工方式排查故障相比，故障檢測(cè)時(shí)間縮短了60%以上。 Abstract: The test system of ship meteorological instrument was developed to satisfy the maintenance of ship meteorological instruments，which composed of information processing terminal， testing module of main instrument and testing module of sensors. Each of these modules included an embedded system based on microcontroller of AVR series and communicated with other module by CAN bus. The results show that the test system can judge the fault of ship meteorological instrument quickly and shorten the fault detection time as much as 60% compared with simple manual troubleshooting.
標(biāo)簽： AVR 單片機(jī) 氣象儀 測(cè)試系統(tǒng)
上傳時(shí)間： 2013-11-23
上傳用戶：stvnash
介紹了一種基于MSP430系列單片機(jī)和ADXL203加速度傳感器的數(shù)字式傾角儀，它不僅可以實(shí)現(xiàn)水平度檢測(cè)，而且可以測(cè)量00～3600范圍內(nèi)的任意傾角，分辨率可達(dá)O．1。。此外，由于該傾角儀輸出為數(shù)字結(jié)果，因此它也可以與其他的數(shù)字設(shè)備結(jié)合起來(lái)，組合成一個(gè)功能更加強(qiáng)大的儀器。該數(shù)字傾角儀可廣泛應(yīng)用于建筑、機(jī)械、道路、橋梁、石油、煤礦和地質(zhì)勘探等各種需要測(cè)量重力參考系下傾角的場(chǎng)合。關(guān)鍵詞：MSP430F133單片機(jī)；力敏傳感器；ADXL203加速度計(jì)；角度測(cè)量 Abstract：This paper presents a new style digital inclinometer which is developed on the basis of the MSP430F133 MCU and the ADXL203 dual axis aeeelerometer．This inclinometer not only can test levelness，but also can measure any angle between 0。and 360。with an accuracy of 0．1 O．In addition，its output is a digital result，which makes it possible to integrate itself with other digital devices to form a more functional unit．This inclinometer can be widely used in any construction site，oil field，coal-mine or geologic survey and SO on where it will provide the working people with convenience to measure any angles．Key words：MSP430F133 MCU；force sensor；ADXL203 accelerometer；angle measurement
上傳時(shí)間： 2013-11-14
上傳用戶：lizhizheng88
FEATURES400 MSPS internal clock speedIntegrated 10-bit DAC32-bit tuning wordPhase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)Excellent dynamic performance>75 dB SFDR @ 160 MHz (±100 kHz offset) AOUTSerial I/O control1.8 V power supplySoftware and hardware controlled power-down48-lead TQFP/EP packageSupport for 5 V input levels on most digital inputsPLL REFCLK multiplier (4× to 20×)Internal oscillator; can be driven by a single crystalPhase modulation capabilityMultichip synchronization
上傳時(shí)間： 2014-12-04
上傳用戶：axin881314
The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug protocol (NO support for Spy-Bi-Wire (2-wire JTAG) debug protocol, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.
上傳時(shí)間： 2013-10-26
上傳用戶：fengweihao158@163.com
常用三星單片機(jī)燒寫(xiě)電壓設(shè)置參考表 燒寫(xiě)電壓說(shuō)明:Vdd 電壓指燒寫(xiě)時(shí)加載到芯片Vdd 端子的邏輯電壓,Vpp 電壓指燒寫(xiě)時(shí)加載到芯片Vpp(Test)端子的編程電壓, Vpp=12V 是編程器的默認(rèn)燒寫(xiě)電壓,無(wú)須特別設(shè)置. 由于編程器的默認(rèn)輸出Vpp 電壓均為12V,因此在燒寫(xiě)Vpp=3.3V/5.0V 的芯片時(shí),需要對(duì)燒寫(xiě)轉(zhuǎn)換適配器作以下改動(dòng):將燒寫(xiě)器燒寫(xiě)座引出的Vpp 端子完全空置不用, 并在適配器上將Vdd端子直接連接Vpp 端即可.當(dāng)用戶采用在PCB板上燒寫(xiě)方式時(shí),建議最好能在PCB芯片端的Vpp腳并接一個(gè)104 的電容入地,可有效保護(hù)在燒寫(xiě)電壓加載時(shí)板子電路共同作用產(chǎn)生的瞬間過(guò)壓脈沖不會(huì)輸入到Vpp 腳而造成Vpp 擊穿.S3F84K4 燒寫(xiě)特別說(shuō)明,由于三星半導(dǎo)體DATA SHEET 要求在對(duì)該芯片進(jìn)行燒寫(xiě)時(shí),須在Vpp 腳加接一個(gè)101 的電容到地,因此在使用我站各款燒寫(xiě)器燒寫(xiě)84K4 時(shí),須將燒寫(xiě)器主板上的Vpp 端原來(lái)并接的10uf/50V-電解電容和104 電容去掉,另行并接一個(gè)101 電容入地即可.不過(guò),據(jù)本人特別測(cè)試結(jié)果,其實(shí)不做以上處理對(duì)燒寫(xiě)過(guò)程沒(méi)有任何影響, 估計(jì)可能是三星半導(dǎo)體對(duì)芯片有做過(guò)改版,老版本的84K4 才會(huì)有以上特別要求,新版本是沒(méi)有這個(gè)要求的.
標(biāo)簽： 三星 單片機(jī) 燒寫(xiě) 電壓設(shè)置
上傳時(shí)間： 2013-10-10
上傳用戶：wcl168881111111
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