regarding viewing of geometry information of layout

Hi,
I want to view the geometrical information of cadence virtuoso layout..
(I'm talking in similar context to that of ".mag" file in "magic"
where we see the layout geometry info like "rect <co-ordinates> and
other "layer " info)
Thanks

 

Is there any standard way of doing it...

 

Hi,

The standard way of doing it is to understand the Cadence DFII
database. You best companion for this is the shdfref.pdf, the Cadence®
Design Framework II SKILL Functions Reference. Go to Chapter 2
"Database Access" and if you are in hurry, just jump to section
"Description of Database Objects".
You will learn in this document the a cellView has loads of
attributes: Instances, nets, Shapes ... etc. You will learn as well,
that Rectangles, paths ... and other figures have attributes like
bBox, lpp, xy (in case of rectangle) ...

In practice, select the layout object you want to monitor and go to
the CIW and type-in
CIW-> geGetSelectedSet~>?
==> This would return the list of attributes of the selected object
CIW-> geGetSelectedSet~>??
==> This would return the list of attributes/values of the selected
object

If your selected object is a rectangle, then try:

geGetSelectedSet~>xy
geGetSelectedSet~>bBox
geGetSelectedSet~>layerName
geGetSelectedSet~>purpose
geGetSelectedSet~>lpp

The above should bring what you were asking.

BTW, there are plenty of threads in this forum related to layout
databases. A quick google search might save you the time waiting for
someone to answer. You are always welcome to ask questions though

Cheers,
Riad.

 

Hi riad,
Thanks for pointing to the manual.(atleast the manual is the solution
to lot of questions that i was planning to ask
(Man!! cadence contains lot of documents that is very huge and
exhaustive ,a unwitting user like me ,can easily get lost in the
quantity of info thats given.
Had this forum not been there, i would have wasted quite a lot of days
in doing unnecessary search .thanks riad.)
Regards,
Lokesh

 

Hi,

Yes, there are loads of docs out there. You don't need them all
though. I have working with Cadence for 8 years and I'm still using
only a dozen of docs out of the ~100 available.
The following is very good for beginners:
http://cadence.wikispaces.com/Documentation+index

I would advice to use the cdnshelp/cdsdoc.

Regards,
Riad.

 

Hi,

Yes, there are loads of docs out there. You don't need them all
though. I have working with Cadence for 8 years and I'm still using
only a dozen of docs out of the ~100 available. The following is very
good for beginners:
http://cadence.wikispaces.com/Documentation+index

I would advice to use the cdnshelp/cdsdoc.

Regards,
Riad.

 

Riad KACED wrote, on 05/13/09 00:39:

I just updated that wiki page to mention cdnshelp. I always use cdnshelp with
IC5141 (cdnshelp is in all current streams - it's not in IC5141 because it's too
old - however, you can use cdnshelp from one stream to open the help from another).

In order to prepare IC5141 for use with cdnshelp, you need to do:

cdnshelp -refresh -hierarchy $ICHOME/doc

(you'll need write access to the installation) and then follow the prompts.

Afterwards, users can then use cdnshelp and do File->Library->Open Library and
point to the $CICHOME/doc/xmlreg/library.lbr file that got created by the above
command. Having added it once, it will appear in the list of libraries.

cdnshelp doesn't involve Java, has a built-in search engine, and doesn't need a
separate web browser. Much easier to use and more reliable.

Regards,

Andrew.