How to save specific signal in Modelsim

[jasonkee111]

I plan to running a simulation using verilog written testbench in Modelsim. I would like to save specific signal(s) into a file(any format). What is the syntax? Pls provide with some example.


Thanks

 

[xfjw]

You can use $dump.. to create VCD files:

initial begin
$dumpfile("test.vcd");
$dumpvars(1,rst,clk,i,o);

#200; // Do your simulation here

$dumpflush;
$finish
end

The VCD file can be shown by waveform viewers. An open-source viewer is gtkwave. I was able to install gtkwave by just running

> yum install gtkwave

I plan to running a simulation using verilog written testbench in Modelsim. I would like to save specific signal(s) into a file(any format). What is the syntax? Pls provide with some example.

 

[rca]

you could also used the list file in Modelsim, this one save each signal modification and the time, in ascii file as VCD.

 

[jasonkee111]

It helps. Thanks