Skill Code to Delete Net connceted to Instance terminal

Hi,

You can filter out all connecting net with specific terminal and delete it. Try this...

 cv = geGetEditCellView()

terminal_id = setof(x cv~>terminals x~>name == <terminal_name>)

foreach( net_id terminal_id~>net

    foreach( fig net_id~>figs

        dbDeleteObject(fig)

    )

)

This will delete all figures that belong to the input terminal.

Rather than using the setof(x cv~>terminals...) part, you could simply use dbFindTermName(cv "terminal_name")

Regards,

Andrew.

Thanks Guys

It works, but it deleted the net in the entire schematic, I just need to delete that connection to the instance only or locally and not globally

Do I need to re-map the net connected to my instance to something else before I delete ?? If so how ??

You can get instTerm information from an instance or from the net. Since your original post referred to a net, you might use some of the following code:

net = dbFindNetByName(cvId netName)
foreach(instTerm net~>instTerms
    when(instTerm~>inst~>name == <some criteria>
        dbDeleteObject(instTerm)
    )
)

You can also access instTerms on an instance using instId~>instTerms.

Derek

Thanks Andrew,

Thanks for enhancing the script!!

Nope it is not working yet

Let me be more specific

Say instance nfet with four terminals, the bulk of which is connected to net name "x"

Some where else there are a bunch of devices connected to net name "x" as well

I need to remove the bulk of nfet from "x" and say map it to netname "y",changing the connectivity of only the nfet and not anything else

Details, details. This is quite a bit different from your first post.

You'll still want to delete the incorrect instTerm information using the code from my previous post. At this point, you just need to create the new connection using dbCreateConnByName. This routine takes the netId, instanceId and a terminal name.

nety = dbFindNetByName(cvId "y")
nfetInst = car(setof(x cvId~>instances x~>cellName=="nfet")) ;this simply gets one placement of your nfet instances
dbCreateConnByName(nety nfetInst "bulk") ; this assumes the bulk pin on the nfet is called bulk

Derek

 Sorry for bringing this old topic to live, but ...

I have a question regarding the same problem: In the layout (without skill), if accidentally I pass with a path, having the information of net X, overthe pins of one or more terminals, for all terminals the isntTerm information is created saying that that specific pin is connected to net X; If I remove the path with the net  X (because it was a mistake) and I want to add the correct net to each pin of each affected instance, I can not do this because LayoutXL is saying (with an error marker) that Iam overlapping net X with the correct net;

So .. my question: What are the solutions for a layouter (not a skill programmer) to fix this problem: to change the connectivity of the pins of some existing instances (so the instTerm information) without deleting and adding the instances again ? 

Thank you,

Best Regards,

Adrian