Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

DRC engine without display connection

edited July 11 in Ruby Scripting

I'm trying to call the DRC engine from a Ruby macro; and run this script on a linux box without a display connection. instance_eval throws an error as it appears instance_eval relies on the layout being loaded in the UI.

For example, the macro:

layout = RBA::Layout::new()
drc_script = "script here"
engine = DRC::DRCEngine::new
engine.instance_eval(drc_script, '')

run without a display adapter:

klayout -zz -r mymacro.rb

throws error "/drc.lym:4065: No layout loaded - no default layout. Use 'layout' or 'source' to explicitly specify a layout."

Is there another way to run DRC without a display connection?

Comments

  • Hi alleva,

    You don't need a script, you can just run a DRC script using

    klayout -b -r myscript.drc
    

    But as there is no layout loaded, you need to explicitly specify the source layout in the script. You don't need to edit the script every time you have a new input file. I do it by setting a variable for the input file name:

    # klayout call:
    klayout -rd layout_file=mylayout.gds -b -r myscript.drc
    
    # at the beginning of myscript.drc:
    source($layout_file)
    ...
    

    Matthias

  • Hi Matthias,

    Thanks for the suggestion. I'm aware of the method you outline above. I'm interested to know if the method I describe above - where the drc is embedded in ruby - can be modified to work without a display connection, as this approach is already implemented in production, and I want to avoid refactoring this particular code.

    Thank you
    Andrew

  • Hi Andrew,

    without knowing the details of your production environment: you can basically use:

    engine = DRC::DRCEngine::new
    engine.source($layout_file)
    engine.instance_eval(drc_script, '')  # the script without "source"
    

    because "engine" is the object providing all the DRC functions as methods.

    Matthias

Sign In or Register to comment.