pass parameters to diva drcExtractRules(

I would like to allow users to overide some parameter values in a
diva extraction deck without having to update the deck. An addition
to the deck that allows users to specify parameters is ok.

My Foundries deck starts out:
drcExtractRules(
ca_coeff = 0.44 ; PRE CA contact resistance area coefficient
via_coeff = 0.055 ; PRE middle via resistance area coefficient
av_coeff = 0.78 ; PRE top AV via resistance area coefficient
resLimit1 = 0.05 ; PRE low limit
resLimit2 = 1000.0 ; PRE high limit
capLimit = 1.0e-18 ; LPE low limit

How can I pass a new value for capLimit in.

The capLimit gets passed to a ignore < capLimit option of
calculateParasitic.

Someone suggested adding a Design variable to the cell.
I assume to do this I would have to change the deck to
open the cellview and get this value. How do you get
the cell name to look in. I could get cell from current open layout
window and tell users they can only run the deck on the layout cell
they have open. Is there a diva command to get the name of the cell
being processed?

(Can skill lines be added to the deck?? I have not modified any
decks before
so I am not sure what skill commands are legal in a diva deck.

 

You can get the cellview using ivGetCellView().

As for SKILL, all SKILL language constructs are available. API functions
for various tools are problematic. All the db*() functions are there, as
are the tech*() functions, so you can access the cellview and it's
techfile to read properties.

What you are really asking for is something like the switches. A way to
declare named parameters in the rule deck, with default values, and set
them from the GUI form, the SKILL interface, and the ivVerify command
line. This is something that is not in Diva. I would think it would be
easy enough to do, if someone were to make the case to the Diva R&D
team. After all, they did add switch support to LVS rule decks recently.