ModelSim® Gate-Level Functional Simulation Example for Verilog HDL

The following example shows a typical gate-level functional simulation in the ModelSim® software for Verilog HDL. You can create a script that performs the following steps:

  • Compiles the altera_mf.v library.
  • Compiles the Verilog Design File (.v) Definition generated by the IP Catalog. In this example, the file is my_pll.v.
  • Compiles the top-level Verilog Design File. In this example, the file name is pllsource.v.
  • Compiles the testbench file. In this example, the testbench file name is plltest.v.

You can simulate this sample design in the ModelSim® software by using the commands shown in the following sample script:

            vlib work                                               # Create working directory
vlog /quartus/eda/sim_lib/altera_mf.v                   # Compile the altera_mf library
exec vmap altera_mf work                                # Create altera_mf library and map it to work
vlog my_pll.v                                           # Compile generated Intel® FPGA IP file
vlog pllsource.v                                        # Compile source instantiating module
vlog plltest.v                                          # Compile testbench file
vsim -t ps work.plltest                                 # Simulate plltest with resolution in ps
add wave /plltest/*                                     # Add the port signals to the waveform view
add wave /plltest/U1/PLL_1/altclock_component/clock1    # Add the clock1 altclklock signal to the 
                                                        # waveform view
run 1000 ns                                             # Run the simulation for 1000 ns