How to add an instance using skill

First open the cell view in append mode :

i.e :

cv=dbOpenCellViewByType("top" "test" "layout" nil "a")    ;;comments : Open new cellview and store its database.

 get master instance db

cv1=dbOpenCellViewByType("libname" "cellname" "layout")   ;; Here get the instance id,is nothing but master id. from which lib,which cell you want to instantiate. 

 The above code is used to get db of the master instance

The below line describes instantiating the master in the opened cell view :

schinst=dbCreateInst(cv cv1 nil list(0 0) "R0" 1)    ;;list is nothing but xy coordinates,by chnages instantiates at different places.

Follow up those three commands,and instantiate,pls let me know if it does'nt works.

Thanks and regards

Subbhareddy

 hi subbhareddy,

it is working. 

 Thanks for your solution and fast response! thank you !

 regards, 

leongec

Hi,

I would like to know how to add a pcell to my layout view with a specific width, length value for the transistor.. I am actually trying to write a SKILL code for placing transistors in common centroid topology. If you have seen this before, pls help me with it.

 You can place the instance as above then update the parameters on it:

 instId = dbCreateInst(.....)
instId~>l = length

OR

use dbCreateParamInst. This command places an instance and can automatically assign the parameter values at placement. It is documented in cdsFinder and the Virtuoso documentation.

Ted

You might also want to look at Modgens in VLS GXL in IC613, as these can achieve the same thing without needing SKILL in many cases (they're created as a constraint).

Best Regards,

Andrew.