It doesn't require as much work as writing a full-blown TestBench, but is likely more flexible than drawing waveforms. Using the stimulus scripting is another option to consider. I did a web search on example files, and I can post some of the commands I used, if this is of interest. There is a method of having ModelSim read a TCL stimulus command file, but I've not needed to use that, since I may be spending a lot of time exploring how I want to conduct the testing itself. This allows you to assign values to your inputs (including clock and reset), to turn them on and off at set times, advance the time wheel, and make variable updates to control the time points when you want events to take place.īefore I created a full-blown VHDL TestBench, I wrote text files filled with TCL script statements, and then would feed these into the ModelSim command line located at the bottom of the display using copy/paste with the mouse. One other method to start with a test stimulus of your design is to write commands in TCL and submit these on the ModelSim command line. Run some of these tests, and you'll see how the simulation-only stimulus 'creates' waveforms that interact with the synthesizeable logic. I've posted some very simple examples in these threads:Īnd a more complicated example in this Wiki page However, as you gain more experience with the tool, you will find that what you really need to create is a model of the device you are interfacing. Since you are just starting to use Modelsim, let me give you some advice - you are going about it the wrong way.ĭrawing a waveform and using that as the basis for your simulation stimulus works ok for some very basic tests.
#Modelsim save waveform configuration pdf
I don't recall the exact procedure, I just followed the documentation - from the Modelsim GUI click on Help -> PDF Documentation, User's Manual. I was playing with the waveform editor in Modelsim 10.0c (Quartus 11.1sp1) last week.
#Modelsim save waveform configuration windows 7
I'm using Quartus II V12.1 with Modelsim-Altera Starter edition V10.1b on a Windows 7 machine. I feel like i'm missing something fundamental or i haven't setup my Modelsim quite right. As i can't find a option to open the waveform wizard and it doesn't allow me to modify the clock waveform, as shown in this screen shot i've taken of what it shows in the Wave window. The object appears in the Wave window but the only waveform i'm able to produce is a clock. I assumed that they might have changed the 'Create Wave' option to 'Add Wave' but when i click this the 'Create Waveform Wizard' doesn't appear either. When i right click on an object, the 'Create Wave' option doesn't appear, as shown in the screenshot i've taken of what i see. I'm following the tutorial 'Introduction to Simulation of VHDL Designs Using ModelSim Graphical Waveform Editor' by Altera found at - Įverything seems to work okay up to the point of creating the waveform on the Wave window. I'm attempting to use Modelsim for the first time.
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