Complete Embedded WorkflowFor embedded engineers, Proteus VSM bridges the gap in the design life cycle between schematic capture and PCB layout. It enables you to write and apply your firmware to a on the schematic and then co-simulate the program within a mixed-mode SPICE circuit simulation, including MCU peripherals.You can interact with the design using on screen indicators such as LED and LCD displays as well as actuators such as switches and buttons. Proteus VSM also provides extensive debugging facilities including breakpoints, single stepping and variable display for both assembly code and high level language source. DesignProteus VSM uses our proven to provide the environment for design entry and development. Proteus capture 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.The Proteus schematic capture module also provides a very high degree of control over the drawing appearance, in terms of line widths, fill styles, fonts, etc.
These capabilities are used to the full in providing the graphics necessary for circuit animation. SimulationThe most exciting and important feature of Proteus VSM is its ability to simulate the interaction between software running on a microcontroller and any analogue or digital electronics connected to it. The micro-controller model sits on the schematic along with the other elements of your product design.
File: Edit: Draw: Scopes: Options: Circuits: Reset: RUN / Stop: Simulation Speed. A world of electronic circuits in your pocket. EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia.
It simulates the execution of your object code (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 program code, just as in real life.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 software 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.With over 750 supported micro-processor variants, many thousands of embedded SPICE models and one the worlds largest libraries of embedded simulation peripherals, Proteus VSM remains the first choice for embedded simulation. Measurement and AnalysisProteus 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 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 invaluable (and inexpensive!) way to get your communication software right prior to hardware prototyping.Should you wish to take detailed measurements on graphs, or perform other analysis types such as frequency, distortion, 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. DebuggingWhilst Proteus VSM is already unique in its capability 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 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.In addition to traditional debugging where you set one or breakpoints in your source and then step the code when they are triggered, Proteus allows you to set breakpoints on the schematic so that a hardware condition can trigger a breakpoint. If a problem is identifiable as a hardware fault, then using hardware breakpoints will pause the simulation whenever the fault condition occurs. For example, if malformed characters were appearing on the LCD display setting a hardware breakpoint on the busy line would be a good place to start investigating.The other major tool at your disposal for single step debugging is the watch window.
This allows register and/or address monitoring and also allows you to add variables from the variables window for inspection. You can set breakpoints on a logical condition of any item added to the watch window making it easy for example to trap a timer overflow. DiagnosticsProteus is equipped with comprehensive diagnostic or trace messaging. This allows you to specify which components or processor peripherals that are of interest at any given time and receive detailed textual reporting of all activity and system interaction. You can specify which on-board peripherals of the MCU that you want to monitor (e.g. SPI, VIC) and also monitor external peripherals such as memory devices, LCD displays or brushless motors.This ability to monitor both sides of communications is invaluable as a debugging aid, allowing you to locate and fix problems in both software and hardware much faster than you could when working on a physical prototype. The VSM AdvantageThe Proteus Design Suite is wholly unique in offering the ability to co-simulate both high and low-level micro-controller code in the context of a mixed-mode SPICE circuit simulation.
With this Virtual System Modelling facility, you can truly use agile development philosophy in embedded engineering projects, reaping huge rewards in terms of reduced time to market and lower costs of development.If one person designs both the hardware and the software then that person benefits as the hardware design may be changed just as easily (and at the same time) as the software design. In larger organisations where the two roles are separated, the software designers can begin work as soon as the schematic is completed; there is no need for them to wait until a physical prototype exists.In short, Proteus VSM improves efficiency, quality and flexibility throughout the design process.
The main LiveSPICE application window for creating and editing circuit schematics.LiveSPICE is a SPICE-like circuit simulation tool for processing live audio signals. The motivationfor developing LiveSPICE is to help prototype guitar effects and amplifiers, without requiringconstructing a physical circuit or waiting for an offline simulation to run to try it out. With LiveSPICE,you can design the circuit in an easy to use visual schematic editor, and simulate it using your realaudio device as an input signal and your speakers as the output.Transient simulation of circuits is an extremely computationally intensive task, making it difficultto perform in real time.
In addition, circuit simulation is a difficult problem to parallelize,meaning that most of the computer power improvements in recent years are not useful to speed up circuitsimulation. In order to deliver real time, low latency transient simulations for audio signals, LiveSPICEis somewhat unique among circuit simulators in the following ways:. LiveSPICE relies heavily on a custom Computer Algebra System (CAS) to perform circuitanalysis. This allows LiveSPICE to evaluate and simplify some of the mathematical operations requiredto simulate the circuit before simulation begins, minimizing the work required during simulation.
LiveSPICE Just-In-Time (JIT) compiles a custom simulation program for the particular circuitbeing simulated. This enables LiveSPICE to separate most of the logic for a simulation for evaluation as apreprocessing step, instead of evaluating it during simulation. LiveSPICE uses simpler component models than most circuit simulators will use for manycomponents, such as transistors and diodes. The simpler models are easier to evaluate quickly, helpingthe simulation to run in real time. However, the simpler models are less accurate and may not replicatethe sound of the real circuit as well as a more advanced simulation would.Despite these measures, there will always be a limit to the complexity of the circuits that can be simulatedin real time. More powerful computers will be able to simulate larger and more complex circuits before running intolimitations with simulation performance.LiveSPICE is a hobby project with no particular goal besides making a tool that is fun to use.
It is an open sourceproject hosted on. If you would liketo contribute, take a look at theand send a pull request! Fender Bassman 5F6-A tone stack controls available during simulation.The obligatory bullet point feature list:. Real time, low latency simulations of circuits for live audio signals.
Easy to use visual circuit schematic editor. The interfaces of many circuit schematic editorsare easily mistaken for a torture device.
If you feel that way about LiveSPICE, I'd love to know how it can beimproved!. Small but growing library of component and part models, including op-amps, transistors,vacuum tubes, transformers, and more. A basic triode amplifier stage.This circuit is a building block of most tube amplifiers.This simulation runs at 213 kHz with an 8x oversampling factor (4.83x real time at a 44.1 kHz sample rate).Circuit described and analyzed in (section 5.4). Documentation Getting started guide Installation Prerequisites. is recommended if you do not have an ASIO compatible audio device.Installing.
Download the current release from. Run LiveSPICESetup.exe and follow the instructions on screen.Configuring your audio device. To configure your audio device, use the menu to select Simulate Audio Configuration.
Choose the driver to use. Prefer ASIO if your device supports it.may also be a better choice than the windows audio driver. Select your device. Select channels to use. Multiple channels may be used simultaneously. A typical scenario is to select one input channelcorresponding to a microphone/line in device; and two output channels if the output device is a stereo device.Use the Test button to ensure your device is working.
The test mode captures the signal fromthe input channels, displays the waveform on the scope, and plays the signal to the output channels.Check that the signal is visible on the scope to ensure the input channels are configured correctly. LiveSPICE maps the digitalsignal maximum (0 dB) to 1 V.
Therefore, if the peak of the signal is near 1 V, it is likely that your audio system will haveclipping issues.Check that you can hear the signal coming from your output device to ensure the output channels are configured correctly.Note that the device cannot be reconfigured while the Test button is pressed. Click theTest button again to stop testing and enable reconfiguration of the audio device. Tutorial: RC low-pass filterThis tutorial will walk through using LiveSPICE to build and simulate a simple passive first-order RC low-pass filter.This tutorial expects that you have already in LiveSPICE.For some background on the filter circuit to be simulated, see thearticle on Wikipedia. Building the circuitThe first step is to build the circuit we are going to simulate.
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To begin, selectFile New to create a new blank schematic. Adding componentsNext, we will begin adding the circuit components.
To add a component, find the componentin the Component Library and click it. Then, click on the schematic whereyou want to place an instance of that component. We're going to need the following components,all from the Generic group in the library, to build the filter:. An Input; the input signal will come from this component, which is anideal voltage source. A Capacitor and a Resistor.
A Speaker; the output signal is measured as the voltage across this component. A Ground.Arrange the components roughly as follows. Tips. You can search the component library by typing the name of the component you are looking for in theFilter field at the top of the library. Use the arrow keys to rotate and flip components while adding them to the schematic.Wiring the componentsNext, we need to wire the components together.
Select the Wire componentfrom the library (or press Ctrl+ W). Adding wires is a little different from the rest of the components, to draw a wirebetween two points, click on one point, and drag to the other point. Drawwires to connect the components as follows.
Tips. Holding Ctrl will allow you to draw more than one wire without selectingthe wire from the library each time. A red terminal indicates that the terminal is not connected.
Make sure none of the terminals are redbefore continuing to the next step.Setting component valuesThe next step is to edit the values of the resistor and capacitor to build the circuit that we want.Let's build a filter with a cutoff frequency near a D 3 (the D string on a guitar), which is 147 Hz.If we use a 1 µF capacitor, we need roughly a 1 kΩ resistor to achieve this. To change the value ofthe components in the circuit, select a component by clicking it. This will bring up the properties for this component.Edit the Capacitance and Resistance fields of the appropriate components by clicking on them and typing the value.
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