microchip computer 中文意思是什麼
microchip computer
解釋
微片計算機-
This paper first begin with the connotation of virtual instrument technology, study and discuss the criterion and the working theory of usb deeply. on the principle of usb1. 1criterion, using usb interface chip usbn9604 and low consumption mirochip c8051f231, we designed the available interface of usb bus and its controlling software, turn the communicating function based usb bus between computer and testing device. second based on the developed interface of usb bus, using microchip pic16c62 and a mount of relays, we designed the multiswitching scanner and its controlling software to complete the funtion of accesses swithing in testing system. third calling the api function inside the windows using vb programming language, communicat with the impelling program of selected hid, achieve the function of testing instrument with usb interface, complete the development of upside software faced testing. at last, based on the deep studying of pcb testing method, used the developed multiswithing scanner and software faced testing, combinated with necessary testing instrument, we constructed the pcb testing system and analized the testing result simply
論文首先從虛擬儀器的技術內涵出發，深入研究和討論了通用串列總線usb規范及工作原理，並依據usb1 . 1規范，採用usb介面晶元usbn9604和低功耗微處理器c8051f231設計開發了通用的usb總線介面及其控制固件，實現了通用計算機與測試設備之間基於usb總線的通信功能；其次，在所開發的usb總線介面的基礎上，使用微處理器pic16c62和多路繼電器開關，設計開發出實現測試系統中測試通道切換功能的多路通道掃描器及其控制固件；再次，採用vb語言編程，調用windows內部api函數，與選定hid類驅動程序進行通信，實現usb總線介面測試儀器功能，完成面向測試的上層軟體開發；最後，在深入研究印刷電路板測試方法的基礎上，利用已開發的多路通道掃描器和面向測試軟體，結合必要測試儀器組建印刷電路板測試系統，並對測試結果進行了簡要的誤差分析。 -
Along the way, americans produced a great middle class and security in old age ; built unrivaled centers of learning and opened public schools to all ; split the atom and explored the heavens ; invented the computer and the microchip ; and deepened the wellspring of justice by making a revolution in civil rights for african americans and all minorities, and extending the circle of citizenship, opportunity and dignity to women
這一進程中，美國形成了一個龐大的中產階級和老年人保險制度；建立了無與倫比的學術中心；為全民開辦了公立黨校；分裂了原子，探測了太空；發明了計算機和集成電路；掀起了一場非裔美國人和少數民族的民權革命運動，深掘了正義的源泉；擴大了婦女公民權利和義務、就業機會和人身尊嚴。 -
Before the connectting between moden and other equipments, it works at the cammand mode, the cammand that is send to moden is used to set or manipulate the mode, after the connectting between moden and other equipments, it works at connectting mode, at that time, the cammand send from the computer is send to another computer which will pass the moden and telephone line. the moden control cammand is called " at " cammand, all the control manipulation is realized by sending the ascii character to moden, after the moden received the " at " cammand, it firstly judges the cammand, secondly, it analyses and executes the cammand, finnally, it executes a response by sending back a ascii character, during the deseign of below - computer, we introduce in detail the deseign of system hardware and system software, below - computer system hardware and system software, below - computer is made up of microchip collecting and controlling system, which finish the strobe and water level data collection, display and disposal, deal with the communication with the above - computer, the microchip is the centre of data dealing with, the peripheral equipments are made up of data collecttion module, control cammand input module, display module, execute output module, and long - distance communication module
在moden控制軟體的設計中，詳細敘述了moden正常工作時的幾個重要函數：初始化函數、撥號處理函數、應答處理函數、掛機處理函數，設計並調試了四個函數的通信程序，數據機工作時存在兩種模式，命令模式與連線模式，命令模式是針對功能設置的模式，連線模式是數據傳輸的模式。當數據機未與其他設備連接時，其處于命令模式，這時候下達給數據機的指令是作為數據機本身設置或操作用的；當數據機已經與其他設備連接時，其處于連線模式，所有在此時由計算機送至數據機的信息都將經由電話線傳送到另一部計算機上。專門使用於控制數據機的指令集被稱為「 at指令集」 ，對moden的所有操作（如撥號、應答、掛機等）都可以通過給moden發送ascii字元串來實現， moden在收到at命令后，先對命令進行判斷，接著分析和執行命令緩沖區中的命令，最後以自身的ascii字元對命令作出響應。 -
We also select the microchip pic16f877 made by microchip co. ltd as a control chip to realize micro - computer control. this system use three separate channel to find out the " across the zero point " of each back - emf. the program use digital filter to wipe off the pwm interferences and the commutating interferences
系統中採用三個獨立通道分別檢測無刷電機三相繞組的反電勢的各自過零點，同時在軟體中採用數字濾波以消除其它噪聲干擾，使檢測電路檢測到的反電勢過零點更加準確可靠，實現了對五位置傳感器直流無刷電機的數字控制。 -
The emphasis of this article is the design in the second period, which is based on the pic microchip interface, because at present embedded structure is adopted by most of medical instruments so that it can run separately without computer, hi this part the article specifically introduces the interface circuit of pic16f877 single - chip, which includes the acquisition of a / d signa ls and the serial communication between the single - chip and computer, the design of complex programmable logic device ( cpld ) and the using of hardware describe language ( vhdl ) to control the rotate speed of 4 - route stepping motors
本論文的重點是在設備的第二階段開發，它是基於pic系列單片機介面的硬體設計，主要是針對現階段大多數醫療設備都是採用嵌入式結構，它能夠脫離計算機單獨運行。在這部分詳細介紹了pic16f877單片機的外圍電路，包括a d信號的採集、單片機與計算機的串列通信，可編程邏輯器件cpld硬體的設計，以及用硬體描述語言vhdl編程來同時實現4路步進電機的轉速控制。
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