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Simulators >> Logic Simulators >> invoking a perl script from ncverilog?
https://designers-guide.org/forum/YaBB.pl?num=1242168569

Message started by joel on May 12^th, 2009, 3:49pm

Title: invoking a perl script from ncverilog?
Post by joel on May 12^th, 2009, 3:49pm

Hi All,
My simulation needs to periodically regenerate its stimulus file based on current simulation conditions. I have a perl script that generates the stimulus file based on a few parameters. Is there a simple way to invoke a perl script from an ncverilog simulation and suspend the simulation until the perl script completes? e.g.

always #10000
begin
$system("create_stim_file.pl");
$readmemh( "stim_file.dat", stim_data);
end
I've glanced at the PLI and VPI docs, but it seems overkill and very complex for my goal.

Thanks,
-Joel

Title: Re: invoking a perl script from ncverilog?
Post by joel on Jun 1^st, 2009, 12:17pm

Hi All,
I guess I'm the only one doing this! But just in case anyone else is interested, here is what the Cadence AE said.

Bracketing the $system call with $display statements will define its location in the event queue. So if you put this in your primary clock loop:

$display("about to...");
$system("create_stim_file.pl");
$display("done...");

and make sure to stop your clock oscillator or whatever time-progression mechanism your sim uses while the three lines are being executed.

Cheers,
/jd