Change Pins from VSS to DVDD and vice versa in the Schematic

In Schematic I am using cv~>instances approach to get allPins, Still it doesnt work

Thanks
Utkarsh

Well, that code wouldn't work in the layout either. There are several things at issue here:

1. You're searching for the pin name - which almost certainly doesn't matter. You probably want to be changing the terminal name as that is what affects the connectivity. The pin name itself is pretty arbitrary - can be anything and doesn't really affect the behaviour (about the only place it matters is for VLS XL abutment within a pcell).
2. Your rexCompile and rexReplace won't do anything because it's looking for a name that is a single character long - and since you've just matched any pin name that contains VSS (note, this could be MYVSS or VSS3), it clearly has more than one character.
3. Even if you'd commented out the rexCompile line (the pattern in the rexMatch is still active, so probably you don't need it), you don't do anything with the result of the rexReplace - so the pin name (had that been what you wanted to change) would be unaffected. You'd have to do x1~>pin~>name=rexReplace( x1~>pin~>name "DVDD" 0))) for it to work.
    

Now, assuming you really wanted to change the terminal name, the following code would work in both schematic and layout:

cv=geGetEditCellView()
foreach(term cv~>terminals
  when(rexMatchp("VSS" term~>name)
    term~>name=rexReplace(term~>name "DVDD" 0)
  )
)

That would replace MYVSS with MYDVDD if that's what you wanted. If you only want an exact match for VSS, don't need the pattern matching:

cv=geGetEditCellView()
foreach(term cv~>terminals
  when(term~>name=="VSS"
    term~>name="DVDD"
  )
)

Regards,

Andrew.

Hi Andrew 

Thanks a lot for the answer, (I will try this code and will come back if I face any issue)
I have a little doubt, The reason why I have not used rexReplace in this fashion  "term~>name=rexReplace(term~>name "DVDD" 0)" was that I was considering it to work like schReplaceProperty() function which does not require any variable to assign.

Can you please tell me the difference between these two functions or the way they should be used. 

Thanks

Utkarsh

Hi Andrew

The code is working fine. Thanks.

Utkarsh

Hi Utkarsh,

rexReplace is a general pattern matching/replacement function - it takes a string as input and returns the updated string. It does not update any variable or expression. schReplaceProperty is explicitly for updating a named property on an object - it's not a matter of updating a variable, but it's designed specifically to modify a parameter on an object. So they do completely different things...

Anyway, glad the updated code is working.

Regards,

Andrew.