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1、<p><b>  目 錄</b></p><p>  About Proteus1</p><p>  1.What is Proteus VSM?1</p><p>  2.Schematic Entry2</p><p>  3.Circuit Simulation2</p>

2、<p>  4.Co-Simulation of Microcontroller Software3</p><p>  5.Source Level Debugging3</p><p>  6.Diagnostic Messaging4</p><p>  7.Peripheral Model Libraries4</p>

3、<p>  8.Why Choose Proteus VSM?4</p><p>  9.Proteus VSM for 80515</p><p>  10.Proteus VSM USB Simulation5</p><p>  10.1 Overview6</p><p>  10.2 How it Wor

4、ks6</p><p>  10.3 What You Need6</p><p>  10.4 Running a USB Simulation7</p><p>  10.5 USB Transaction Analyser7</p><p>  10.6 The USB Analyser in Proteus8</p&g

5、t;<p>  11.Supported Third Party Compilers8</p><p>  關于Proteus9</p><p>  1. 什么是Proteus的 VSM?9</p><p>  2. 圖表輸入9</p><p>  3. 電路仿真10</p><p> 

6、 4. 協(xié)同仿真單片機軟件10</p><p>  5. 源代碼級調試10</p><p>  6. 診斷消息11</p><p>  7. 周邊模型庫11</p><p>  8. 為什么選擇Proteus 的VSM?11</p><p>  9. Proteus VSM對8051的應用12&

7、lt;/p><p>  10. Proteus VSM仿真USB接口12</p><p>  10.1 Proteus VSM的USB概覽12</p><p>  10.2 Proteus VSM的USB如何運作12</p><p>  10.3 使用Proteus VSM的USB條件13</p><p>

8、  10.4 一個USB的模擬運行13</p><p>  10.5 USB接口交易分析13</p><p>  10.6 USB在VSM中的分析儀14</p><p>  11. 支持第三方編譯器14</p><p>  About Proteus</p><p>  Many CAD users d

9、ismiss schematic capture as a necessary evil in the process of creating PCB layout but we have always disputed this point of view. With PCB layout now offering automation of both component placement and track routing, ge

10、tting the design into the computer can often be the most time consuming element of the exercise. And if you use circuit simulation to develop your ideas, you are going to spend even more time working on the schematic.<

11、;/p><p>  ISIS has been created with this in mind. It has evolved over twelve years research and development and has been proven by thousands of users worldwide. The strength of its architecture has allowed us

12、to integrate first conventional graph based simulation and now –with PROTEUS VSM – interactive circuit simulation into the design environment. For the first time ever it is possible to draw a complete circuit for a micro

13、-controller based system and then test it interactively, all from within the sam</p><p>  For the educational user and engineering author, ISIS also excels at producing attractive schematics like you see in

14、the magazines. It provides total control of drawing appearance in turns of line widths, fill styles, colours and fonts. In addition, a system of templates allows you to define a ‘house style’ and to copy the appearance o

15、f one drawing to another.</p><p>  What is Proteus VSM?</p><p>  Proteus Virtual System Modelling (VSM) combines mixed mode SPICE circuit simulation, animated components and microprocessor model

16、s to facilitate co-simulation of complete microcontroller based designs. For the first time ever, it is possible to develop and test such designs before a physical prototype is constructed.</p><p>  This is

17、possible because you can interact with the design using on screen indicators such as LED and LCD displays and actuators such as switches and buttons. The simulation takes place in real time (or near enough to it): a 1GMH

18、z Pentium III can simulate a basic 8051 system clocking at over 12MHz. Proteus VSM also provides extensive debugging facilities including break points, single stepping and variable display for both assembly code and high

19、 level language source.</p><p>  Screen shot of the ISIS schematic editor showing a fully functional virtual representation of the Microchip? PICDEM2+ Evaluation Board, containing PIC18F452,Alpha LCD, TC74 t

20、emp sensor, 24LC256 I2C EEPROM, RS232 terminal and various buttons, pots, LED's etc.</p><p>  Schematic Entry</p><p>  Proteus VSM uses our proven Schematic Capture software to provide the e

21、nvironment for design entry and development. ISIS is a long established product and combines ease of use with powerful editing tools. It is capable of supporting schematic capture for both simulation and PCB design. Desi

22、gns entered in to Proteus VSM for testing can be netlisted for PCB layout either with our own PCB Design products or with third party PCB layout tools. ISIS also provides a very high degree of control over the</p>

23、<p>  Circuit Simulation</p><p>  At the heart of Proteus VSM is ProSPICE. This is an established product that combines uses a SPICE3f5 analogue simulator kernel with a fast event-driven digital simula

24、tor to provide seamless mixed-mode simulation. The use of a SPICE kernel lets you utilise any of the numerous manufacturer-supplied SPICE models now available and around 6000 of these are included with the package.</p

25、><p>  Proteus VSM includes a number of virtual instruments including an Oscilloscope, Logic Analyser, Function Generator, Pattern Generator, Counter Timer and Virtual Terminal as well as simple voltmeters and

26、ammeters. In addition, we provide dedicated Master/Slave/Monitor mode protocol analysers for SPI and I2C - simply wire them onto the serial lines and monitor or interact with the data live during simulation. A truly inva

27、luable (and inexpensive) way to get your communication software right prior t</p><p>  Should you wish to take detailed measurements on graphs, or perform other analysis types such as frequency, distortion,

28、noise or sweep analyses of analogue circuits, you can purchase the Advanced Simulation Option. This option also includes Conformance Analysis - a unique and powerful tool for Software Quality Assurance.</p><p&

29、gt;  Co-Simulation of Microcontroller Software</p><p>  The most exciting and important feature of Proteus VSM is its ability to simulate the interaction between software running on a microcontroller and any

30、 analog or digital electronics connected to it.</p><p>  The micro-controller model sits on the schematic along with the other elements of your product design. It simulates the execution of your object code

31、(machine code), just like a real chip. If the program code writes to a port, the logic levels in circuit change accordingly, and if the circuit changes the state of the processor's pins, this will be seen by your pro

32、gram code, just as in real life.</p><p>  The VSM CPU models fully simulate I/O ports, interrupts, timers, USARTs and all other peripherals present on each supported processor. It is anything but a simple so

33、ftware simulator since the interaction of all these peripherals with the external circuit is fully modelled down to waveform level and the entire system is therefore simulated.</p><p>  VSM can even simulate

34、 designs containing multiple CPUs, since it is a simple enough matter to place two or more processors on a schematic and wire them together.</p><p>  Source Level Debugging</p><p>  Whilst Prote

35、us VSM is already unique in its capabililty to run near real time simulations of complete micro-controller systems, its real power comes from its ability to perform these simulations in single step mode. This works just

36、like your favourite software debugger, except that as you single step the code, you can observe the effect on the entire design - including all the electronics external to the microcontroller.</p><p>  VSM a

37、chieves this in a number of ways, dependent on the processor family and the tools that you are using. For detailed information on the third party compilers supported by Proteus VSM please see the Third Party Compilers pa

38、ge.</p><p>  Debugging windows for the PIC24 Virtual Explorer16 Design. Shown are the source code showing breakpoints and both high level and low level instructions, watch window with expandable named SFR

39、9;s, variable window with expandable compound types and user configurable IDLOC memory dump.</p><p>  Diagnostic Messaging</p><p>  Proteus is equipped with comprehensive diagnostic or trace mes

40、saging. This allows you to specify which components or processor peripherals they are of interest at any given time and receive detailed textual reporting of all activity and system interaction. This is invaluable as a d

41、ebugging aid, allowing you to locate and fix problems in both software and hardware much faster than you could when working on a physical prototype.</p><p>  Diagnostic Setup and Simulation Advisor showing t

42、race messages from the Alphanumeric LCD Display model.</p><p>  Peripheral Model Libraries</p><p>  In addition to the microprocessor models for each supported family, and literally thousands of

43、 'standard' models for passives, TTL/CMOS, memories, etc. Proteus VSM is equipped with a comprehensive library of embedded peripheral models, from alphanumeric and graphical LCD displays, through DC, BLCD and ser

44、vo motors to ethernet controller chips. A summary listing of the peripheral models included with Proteus can be found here.</p><p>  Why Choose Proteus VSM?</p><p>  When choosing the right soft

45、ware solution it is often easy to lose sight of which products offer what functionality, particularly when several software companies offer packages which at first glance may look identical. Proteus VSM was the first mic

46、rocontroller co-simulation package and offers more models with greater detail at the best price. To help clarify this, and to avoid confusion over product offerings, we have compiled some functional comparisons below. Th

47、e core of any embedded system de</p><p>  It's not a great deal of use to have a functionally perfect microcontroller model of a variant that you don't want to use and have no model at all for a devi

48、ce you do want to use. The following chart details the model families available. Note that you should always check that variants you want to use are actually modelled - Proteus VSM offers well over 150 microcontroller va

49、riants across our range and we are continually responding to customer demand to implement additional variants.</p><p>  In embedded systems design it's vital that you have simulation models for the perip

50、herals that you are likely to use. Aside from the standard collection of TTL/CMOS libraries, opamps, diodes, transistors, etc. the following chart lists some common embedded peripherals and their support within various p

51、ackages. Being engineers ourselves we are always conscious that being able to simulate a schematic design is only part of the process. The real value and timesaving potential of co-simulation softw</p><p>  

52、Proteus VSM for 8051</p><p>  Proteus VSM for 8051 contains everything you need to develop, test and virtually prototype your embedded system designs based around the popular 8051 series of microcontrollers.

53、 The unique nature of schematic based microcontroller simulation with Proteus facilitates rapid, flexible and parallel development of both the system hardware and the system firmware. This design synergy allows engineers

54、 to evolve their projects more quickly, empowering them with the flexibility to make hardware or firmwa</p><p>  Proteus VSM USB Simulation</p><p>  Proteus VSM USB simulation represents the wor

55、lds first (and only) schematic based USB Simulation engine. You can now design your own USB peripheral device entirely in Proteus (using one of the supported microcontrollers) and then test both the firmware and the hard

56、ware by simulating the circuit. Communication is modelled down to Windows driver level, with all requests to and replies from the simulated USB device displayed in the USB Transaction Analyser. Proteus VSM is discussed i

57、n more detail h</p><p>  10.1 Overview</p><p>  The main aim of the Proteus VSM USB Simulation is to allow complete simulation of those microcontrollers having an on-board USB peripheral. Since

58、the vast majority of such devices have a USB device peripheral as opposed to a USB host controller peripheral Proteus VSM is currently limited to simulation of USB devices (devices that attach to the USB socket on the co

59、mputer), and specifically to simulation of the following USB Device classes.</p><p>  Support for additional classes (and indeed additional microcontroller variants) is on-going and, depending on demand, imp

60、lementation of USB host simulation support may also be considered.</p><p>  10.2 How it Works</p><p>  The schematic in Proteus represents the peripheral device (e.g. a USB memory stick or a USB

61、 mouse). A special schematic part called the USB connector is wired to the USB enabled microcontroller and clicking on this schematic part during simulation is equivalent to plugging in the device to a USB slot on your P

62、C. The microcontroller executes the firmware through the schematic and USB communication will take place with the PC operating system in the same way as plugging in a physical equivalent de</p><p>  10.3 Wha

63、t You Need</p><p>  A licence for a microcontroller family with supported USB variants. This includes our schematic capture engine and enables USB simulation on the variants which include on-board USB periph

64、erals. </p><p>  A licence for the USB Transaction Analyser. This enables you to monitor and analyse USB traffic and register access operations during simulation. </p><p>  Analysis capabilities

65、 can be upgraded to include Graph Based Simulation via the Advanced Simulation Options module.</p><p>  Proteus VSM PIC18F4550 model simulating Microchip Technologies Mass Storage firmware to present a file

66、stored in the simulated MMC model to Windows via USB.</p><p>  10.4 Running a USB Simulation</p><p>  In practise, running a USB simulation differs little from any other VSM simulation. The typi

67、cal procedure is outlined below.</p><p>  Apply the COF/HEX file to the program property of the microcontroller schematic part in ISIS. </p><p>  Run the simulation via the PLAY button at the bo

68、ttom of the ISIS application. </p><p>  Click on the USB Connector schematic part to connect the USB device - this is equivalent to plugging in the physical equivalent device to your PC. </p><p>

69、;  Use the USB Transaction Analyser to monitor and verify USB traffic as your simulation progresses. </p><p>  Debug and test your firmware and circuit as per any normal Proteus VSM simulation - bearing in m

70、ind that the USB Protocol has a 30 second timout limitation (your simulation needs to respond to requests within 30 seconds). </p><p>  Stop the simulation via the STOP button at the bottom of the ISIS appli

71、cation.</p><p>  Modify firmware or 'hardware' as required and re-run the simulation to test. </p><p>  When complete use the netlist command to transfer to ARES and commence PCB Layout.

72、 </p><p>  10.5 USB Transaction Analyser</p><p>  The Proteus USB Analyser is a seperately licenced product that displays all requests and replies to and from the simulated USB device. This prov

73、ides an invaluable aid both to understanding the USB protocol and in verification of firmware implementation. The main Analyser window consists of two parts: the Requests List and the Requests Description as shown below.

74、</p><p>  10.6 The USB Analyser in Proteus</p><p>  The Requests list on the left hand pane of the Analyser displays all requests in tree format. There are three levels of requests; IRP requests

75、 (IOCTL, MJ_PNP), Transaction requests (IN, OUT, SETUP) and register operations associated with a given transaction. The request description forms the right hand side of the Analyser and provides detailed tabular informa

76、tion on the currently selected item in the Requests List. Given that the Requests list is granular to three levels it follows that compreh</p><p>  Supported Third Party Compilers</p><p>  All P

77、roteus VSM processor models are able to run binary files (i.e. Intel or Motorola Hex files) produced by any assembler or compiler. However, the debugging facilities available are very limited since the processor model ha

78、s no way to correlate the machine code it is executing with your original source program.</p><p>  Fortunately, most compilers also produce symbolic debug data files that contain extra information to be used

79、 by debuggers and other tools. The Proteus VSM processor models are able to load the debug data files produced by selected third party compilers enabling them to provide full high-level language debugging facilities incl

80、uding the ability to display and step through the original source code as well as display the contents of program variables as the code executes.</p><p><b>  關于Proteus</b></p><p>  許

81、多CAD用戶不喜歡示意圖捕獲的過程中創(chuàng)造的PCB布局,但我們對這個觀點一直有爭議。 PCB布局與現(xiàn)在提供的這兩個組成部分:自動化安置和跟蹤路由,使得計算機設計往往是最耗時的。如果你使用的是電路仿真,想開拓自己的想法,你要花費更多時間學習工作原理。 </p><p>  ISIS已創(chuàng)建了這一方面。它已演變十二年的研究和開發(fā),并且數(shù)以千計的用戶已證明了它的實力。它的架構,讓我們把常規(guī)的模擬圖與變形的VSM -交互式電

82、路仿真結合起來形成設計環(huán)境。有史以來第一次可以得出一個完整的電路的微控制器系統(tǒng),然后進行測試交互。與此同時,ISIS保留了許多功能,比如印刷電路板設計,可以使相同的設計適用于其他PCB設計軟件。 </p><p>  對教育用戶和工程工作者,ISIS還擅長制作有吸引力的圖表,就像你看到的雜志。它提供了完全控制圖紙外觀輪流的線寬,填寫樣式,顏色和字體。此外,系統(tǒng)的模板,可以定義你喜歡的風格和復制繪圖到另一個設計中。

83、</p><p>  1. 什么是Proteus的 VSM?</p><p>  Proteus是虛擬系統(tǒng)模型與VSM相結合的混合模式的SPICE電路模擬、動態(tài)元件和微處理器模型,以促進共同完成模擬微控制器為基礎的設計。有史以來第一次將開發(fā)和測試設計在物理樣機中。這是可能的,因為你可以交互的使用設計屏幕上的指標,如LED和LCD顯示器和驅動器,開關和按鈕等。實時仿真時:一個1GMHz奔騰

84、III處理器可以模擬一個基本系統(tǒng)時鐘超過12MHz的8051單片機 。Proteus 的VSM還提供了廣泛的調試設施,包括斷點,單步和可變顯示代碼,對調試高級語言源代碼提供方便。</p><p>  ISIS截圖的原理圖編輯器顯示一個功能齊全的虛擬代表性的微處理器PICDEM2,其中載有PIC18F452液晶,TC74溫度傳感器,24LC256的I2C EEPROM存儲器, RS232串口終端和各種按鈕,LED燈

85、等。</p><p><b>  2. 圖表輸入</b></p><p>  我們對Proteus VSM的使用證明Capture軟件提供的環(huán)境設計項目和發(fā)展是功能強大的。ISIS的建立是一個長期的過程,產(chǎn)品的易用性與強大的編輯工具都經(jīng)歷了很長時間的改進,它能夠支持兩個示意圖捕捉模擬和PCB設計,設計進入到VSM測試可以使用netlisted的PCB布局或者我們自己

86、設計PCB產(chǎn)品或與第三方PCB布局工具聯(lián)調。ISIS還提供了一個高程度的控制,對圖紙外觀,線寬,填寫樣式,字體等進行控制,這些功能的充分利用為我們提供了必要的電路圖形動畫。</p><p><b>  3. 電路仿真</b></p><p>  最核心的Proteus VSM是ProSPICE 。這是一個既定的產(chǎn)品,是使用SPICE3模擬仿真器內(nèi)核與快速事件驅動結合

87、起來的數(shù)字仿真,提供無縫混合模式模擬,使用的是SPICE的內(nèi)核,你可以利用任何制造商提供的SPICE模型進行封裝。</p><p>  Proteus的VSM包括一些虛擬儀器如示波器,邏輯分析儀,函數(shù)發(fā)生器,圖形發(fā)生器,計數(shù)器定時器和虛擬終端以及簡單的電壓表和電流表。此外,我們提供專門的主/從監(jiān)視器模式協(xié)議分析器的SPI和I2C,它們是串行線的監(jiān)測或與生活中的數(shù)據(jù)模擬。</p><p> 

88、 如果你想詳細測量的圖表,或執(zhí)行其他分析類型,如頻率,失真,噪音或掃描分析模擬電路,可以購買高級模擬期權。此選項還包括一致性分析,一個獨特和強大的工具還有軟件質量保證。</p><p>  4. 協(xié)同仿真單片機軟件</p><p>  最令人興奮的和最重要的特征是Proteus的VSM是能夠在模擬軟件之間的互動關系上運行的微控制器使得任何模擬或數(shù)字電子產(chǎn)品都能連接到它。</p>

89、;<p>  該微控制器模型示意圖將您的產(chǎn)品設計的其他內(nèi)容連接在一起。它模擬執(zhí)行你的目標代碼(機器代碼),就像一個真正的芯片。如果程序代碼寫入端口,邏輯電平電路會相應地改變,然后這個狀況的改變就會通過處理器的針腳輸出,這將使您能夠看到您的程序代碼,就像在真實硬件中一樣。</p><p>  在VSM中的CPU型號完全模擬I/O端口,中斷,定時器,通用同步和所有其他外圍設備上的每一個處理器。為什么一個

90、這么簡單的軟件模擬器可以模擬這么多外設呢?因為所有這些相互作用的外設與外部電路完全仿真到波形水平和整個系統(tǒng)。</p><p>  VSM甚至可以模擬設計包含多個處理器,因為它可以簡單的將兩個或兩個以上的處理器的原理圖和線在一起。</p><p>  5. 源代碼級調試</p><p>  VSM的獨特性在于,它的功能運行接近實時模擬完成微控制器系統(tǒng),但是它真正的功

91、能來自于能夠利用單步模式執(zhí)行這些功能,這個工程就像是最適合你的軟件調試器,通過單步調試代碼,你可以觀察整個設計:包括所有的電子產(chǎn)品外部微控制器。</p><p>  VSM在許多方面達到這一目標,你使用的是依賴于處理器和工具的功能。如需第三方編譯器支持的Proteus VSM的詳細資料,請參閱第三方編譯頁。</p><p>  調試窗口的PIC24虛擬Explorer16設計。所示的源代碼

92、顯示斷點和兩個高級別和低級別的指示,監(jiān)視窗口擴展名為.SFR,擁有可變的窗口擴展復合類型和用戶配置IDLOC內(nèi)存轉儲。</p><p><b>  6. 診斷消息</b></p><p>  VSM配備了全面的診斷或追蹤信息。這使您能夠指定哪些部件或外設的處理器在任何特定時間都能收到所有活動的詳細的文字報告和系統(tǒng)的相互作用。作為一個調試這是非常好的功能,讓您查找和解

93、決軟件和硬件問題的速度遠遠超過你對物理樣機工作時的速度。診斷安裝與仿真顧問跟蹤信息利用數(shù)字液晶顯示字母工作模式。</p><p><b>  7. 周邊模型庫</b></p><p>  除了微處理器型號和數(shù)以千計的'標準'的被動模式,它支持所有類型,對TTL 的CMOS ,存儲器等的Proteus VSM是配備了全面的嵌入式外設庫模式,由字母和圖形

94、液晶顯示器,通過直流, BLCD和伺服電機的以太網(wǎng)控制器芯片。</p><p>  8. 為什么選擇Proteus 的VSM?</p><p>  當選擇合適的軟件解決方案時,往往容易忽略的是產(chǎn)品可提供哪些功能,特別是當一些軟件公司提供成套乍看之下可能看起來是相同的功能時,Proteus 的VSM是第一個微控制器協(xié)同仿真包,并能提供更多更詳細的模型。</p><p&g

95、t;  嵌入式系統(tǒng)設計的微控制器和完整的模型以及它的準確度是核心,因此是至關重要的。你應始終確保微控制器仿真模型不僅支持外圍您要使用的設備,而且支持的式要在其中使用外設和令人滿意的詳細程度。我們發(fā)現(xiàn),一些微控制器模型實際上擁有很多的指令集模擬器(詳細的Proteus VSM的微控制器模式)。</p><p>  這不是一個功能很強大的完善的微控制器模型,如果你不想使用,并不會在示范裝置安排中要求你使用,但是請注意

96、,你應經(jīng)常檢查變種您要使用的實際是仿真:Proteus VSM提供多達150多個微控制器,在我們的能力范圍內(nèi),我們不斷地響應客戶需求,補充額外的功能。</p><p>  在嵌入式系統(tǒng)的設計中更最重要的是,你很可能會使用模擬的外圍設備。除了標準的TTL 的CMOS管,二極管,晶體管等以外,還有常見的嵌入式外設,并支持不同的軟件包。作為工程師我們自己總是意識到,能夠模擬計劃設計僅僅是這個進程的一部分,它的實際價值和

97、潛在的聯(lián)調的仿真軟件在于它的功能,以協(xié)助您找出并修正錯誤在您的軟件和硬件設計。它包括一些常見的調試設施,你會發(fā)現(xiàn)存在不同的軟件包。</p><p>  9. Proteus VSM對8051的應用</p><p>  Proteus VSM的8051應用包含你所需要的一切開發(fā),測試和原型,實際上你的嵌入式系統(tǒng)設計基于流行的8051系列微控制器,它的獨特性原理為基礎的微控制器仿真變形有利于

98、快速,靈活和并行的發(fā)展系統(tǒng)硬件和系統(tǒng)固件。這種設計使得工程師協(xié)同發(fā)展的項目更迅速,使他們的靈活性,使硬件或固件的變化更明顯,而且還能減少產(chǎn)品上市時間。</p><p>  10. Proteus VSM仿真USB接口</p><p>  USB接口的Proteus VSM的仿真代表世界第一(只)原理為基礎的USB仿真引擎?,F(xiàn)在,您可以設計自己的USB外圍設備完全變形(使用一種受支持的微控

99、制器),然后測試固件和硬件的模擬電路,溝通的模式,以及Windows驅動程序的水平,所有的請求和答復的模擬仿真都顯示USB設備的USB交易分析儀。</p><p>  10.1 Proteus VSM的USB概覽</p><p>  接口仿真主要的目的是允許擁有完全模擬這些微控制器的板上USB外設,由于絕大多數(shù)的此類裝置周圍有一個USB設備,而不是USB主機控制器周邊的Proteus V

100、SM的目前僅限于模擬USB設備(裝置,附加到USB接口的電腦上) 。</p><p>  支持更多類型(實際上更多的微控制器變種)是持續(xù)的,并根據(jù)需求,實施模擬支持USB主機也可考慮。</p><p>  10.2 Proteus VSM的USB如何運作</p><p>  VSM代表外圍設備(例如,一個USB記憶棒或USB鼠標),特別示意部分稱為USB接口是有線

101、的USB功能的微控制器和點擊這個原理在模擬部分相當于堵在設備到USB插槽在您的PC上。微控制器執(zhí)行固件通過原理和USB通信將與PC操作系統(tǒng)一樣堵在一個物理設備,相當于一個備用的USB接口的電腦上。交易分析儀的USB接口可用于解碼和顯示所有交易和登記URB訪問操作,并在模擬的全系列的Proteus VSM的調試技術也可以,這意味著你可以設計,調試和測試您的USB外設的完全變形的軟件環(huán)境,然后再建造一個物理樣機。</p>&l

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