ATI public wiki - User contributions [en]

File:ModelSim simulation run gui.png

2025-02-20T09:34:09Z

Hartz: Hartz uploaded a new version of File:ModelSim simulation run gui.png

File:ModelSim simulation run gui.png

2025-02-20T09:32:25Z

Hartz: Hartz uploaded a new version of File:ModelSim simulation run gui.png

ModelSim ENG

2025-02-20T09:31:37Z

Hartz: Simu explanation

==Before we start==

Go to your project directory in the linux command line by using command '''cd'''

Example:
<pre>
cd ~/P/lab_1
</pre>

If your target directory does not exist, you can create it with command '''mkdir'''

Example:
<pre>
mkdir -p /P/lab_1
</pre>


IT IS HIGHLY SUGGESTED to develop your code in the '''~/Desktop''' directory.


After you completed your work '''move''' (mv) or '''copy''' (cp) your work to the '''~/P''' folder.

==Linux environment setup==

In the lab class, we need to set up the Linux command line environment, which allows
us to use ModelSim.

The command for the environment choices is cad. The command must
be entered twice.

To select ModelSim, choose option 2 (Mentor Graphics 2021 EDA version).


Another important note to remember is that ModelSim
doesn’t support CTRL+c shortcut.

==Starting ModelSim==
To start the program, you must insert the command

'''vsim &'''

The '''&''' in the end of the command shows that the program is run in the background and the 
prompt is returned immediately. It means that to run another process, you don’t have 
to open a new command line window. You can use '''&''' behind every process command.

[[File:Modelsim_start.png|588px|ModelSim main view]] 
Figure 1. ModelSim main view.


If you forgot to change your working directory before, it is also possible to do it now.

File->Change Directory 
Navigate to the directory containing your design files 
Ok

==Compiling the design==
To compile your design you can either create a new project and compile the files 
in the project or just compile every file without creating a project. Somewhat 
easier is to create a new project. This gives you the chance to open the project 
later without any need to specify the files in there or the library used.

===Option1: Compilation without project creation - preferred===
====Creating a compilation library====
A compilation library is a directory on your disk into which all HDL designs are compiled. 
You can specify this library through the ModelSim or it can be created using operation system 
commands. Usual library name is work. Now lets create a directory called work 
and map the directory to the logical library named work.

* File->New->Library
* Select Create a new library and a logical mapping to it (Figure 2).
* Type work into the library form. Note that it’s duplicated.
* Select Ok.
* Verify that the directory with the name work has been created in your lab directory.

[[File:ModelSim_new_work.png|400px|ModelSim new work library]] 
Figure 2. Creating new work library

====Compiling your design====
Now lets compile the design. 
For example we’ll take the lab1 mux.vhd VHDL file.

* Compile->Compile…
* The following dialog box appears (Figure 3).
* Make sure that Library is set to work.
* Select the design file you want to compile, for example mux.vhd and then click Compile.
* Check the main ModelSim window for the results of compilation.

[[File:ModelSim_compile.png|400px|ModelSim new work library]] 
Figure 3. Compiling source files

===Option2: Compiling with project creation - WIP===

==Simulation==
===Starting the simulator===
To invoke the simulator:

# Simulate
# Start Simulation
# In the design tab find work library.
## In the work library find the topmost design’s testbench you wish to simulate.
## Be aware to uncheck the Enable optimization box.
# Optimization Options
# "Apply full visibility to all modules (full debug mode)"
## Selecting this will keep all debug signals in your design
# Ok.

[[File:ModelSim_simlation.png|800px|ModelSim Simulation]] 
Figure 4. Starting simulation for the design TestBench

The “'''loading…'''” message will appear in the main window to 
confirm that the files have loaded correctly. 
If you receive an error message asking to re-compile the testbench design, 
then you have compiled the files in the wrong order.

====Organizing the display====
Usually, windows Workspace, Objects, and Wave are used during simulation (Figure 5). 
These should open automatically, OR you can open them from the '''View''' menu.

====Adding Signals to Wave window====

# Highlight the '''Objects''' window by clicking it.
# Right-click on the '''Objects''' window
# '''Add to''' -> '''Wave''' -> '''Signals in Design'''

[[File:ModelSim_signal_wave.png|800px|ModelSim Simulation]] 
Figure 5. Adding design signals to the '''Wave''' window

===Running Simulation===

====Using run command====
You can run the simulation for a set amount of time by typing run X in the command 
line of the Main window, where X is the number of nanoseconds that you wish to run for. 
For example, run for 100 ns: VSIM > '''run 100 ns'''

Command run without specifying the time will execute the simulation for the 
default amount of time. You can set the default run period:

* Simulate->Runtime Options…
* Enter the amount of time into the Default Run box.
* Select Ok.
* Simulate->Run->Run “default time” ns.

====Using GUI====
Find icons shown in Figure 6 in the '''Main''' window. 
You will need to use Icons (explained in bold) most commonly.

[[File:ModelSim_simulation_run_gui.png|300px|ModelSim Simulation Buttons]] 
Figure 6. ModelSim Simulation Buttons

# '''Restart''': Restarts the simulation
# '''100ns''' (default): custom time for simulation length
# '''Run''': Simulates for custom specified time
# Continue Run
# '''Run All''': Runs simulation endlessly OR until "wait" statement is reached in the testbench
# Break: Pauses the simulation
# Stop: Stops Simulation without the possibility of continuing.

File:ModelSim simulation run gui.png

2025-02-20T09:31:04Z

Hartz: Hartz uploaded a new version of File:ModelSim simulation run gui.png

File:ModelSim simulation run gui.png

2025-02-20T09:06:19Z

Hartz:

File:ModelSim signal wave.png

2025-02-20T08:59:38Z

Hartz:

File:ModelSim simlation.png

2025-02-20T08:37:25Z

Hartz: Hartz uploaded a new version of File:ModelSim simlation.png

File:ModelSim simlation.png

2025-02-20T08:33:27Z

Hartz:

ModelSim ENG

2025-02-19T15:01:21Z

Hartz:

ModelSim ENG

2025-02-19T15:00:17Z

Hartz: Design compilation - Option 1 done

File:ModelSim compile.png

2025-02-19T14:55:14Z

Hartz:

File:ModelSim new work.png

2025-02-19T14:50:53Z

Hartz:

File:Modelsim start.png

2025-02-19T14:46:26Z

Hartz:

ModelSim ENG

2025-02-19T14:17:00Z

Hartz: Inglise keelne juhend ModelSim

==Before we start==
In the lab class, we need to set up the Linux command line environment, which allows
us to use ModelSim.

The command for the environment choices is cad. The command must
be entered twice.

To select ModelSim, choose option 2 (Mentor Graphics 2021 EDA version).


Another important note to remember is that ModelSim
doesn’t support CTRL+c shortcut.

==Starting ModelSim==
To start the program you must insert command

'''vsim &'''

The & in the end of the command shows that the program is run in the backround and the 
promt is returned immediately. It means that to run another process you don’t have 
to open a new command line window. You can use '''&''' behind every process command.