PA221
Simulations with iverilog and gtkwave
Verilog Simulation with Icarus Verilog
● Icarus Verilog
○ Compile Verilog into an executable.
○ Windows installers: https://bleyer.org/icarus/, let the installer update PATH
● GTKWave
○ Installed together with Icarus Verilog
Verilog Simulation with Icarus Verilog: MWE
Create a text file hello.v with the following contents:
module hello;
initial begin
$display(“Hello world!\n”);
$finish;
end
endmodule
Compile and run it with:
iverilog -o hello hello.v
vvp hello
Verilog Simulation with Icarus Verilog: Example
Download and extract w01_fixpkt.zip from the study materials.
Compile and run the testbench using:
iverilog -o fixpkt fixpkt.v fixpkt_tb.v
vvp fixpkt
Examine the generated fixpkt_tb.vcd using GTKWave.
Verilog Simulation with Icarus Verilog: Task
Write your own testbench.
You can use delays (#10) anywhere, all kinds of loops, initial statements are fully
supported, file I/O works.