Technical data

Basic VHDL simulation

ModelSim EE Lessons ModelSim EE Tutorial

Basic VHDL simulation

The goals for the first lesson are:

• create a library

• compile a VHDL file

• start the simulator

• understand the basic VSIM windows, mouse, and menu conventions

• run VSIM using the

run

command

• list some signals

• use the waveform display

• force the value of a signal

• single-step through a simulation run

• set a breakpoint

• use the Wave window

You’ll start out by creating a new directory for this exercise (in case other users will

be working these lesson). Create the directory, then copy all of the VHDL (.vhd) files

from the

/<install_dir>/<modelsim_dir>/examples

to the new directory.

Make sure the new directory is the current directory.

Start Model

Sim

with one of the following:

for UNIX at the shell prompt:

vsim -gui

for Windows - your option - DOS prompt, shortcut, or Start menu:

modelsim.exe

This opens the Model

Sim

Main window without loading a design.