How to get a list of all instances that match a cellName in a hierarchical schematic ?

As far as I know there is no SKILL builtin command which returns you all instances down a hierarchy - as you say cv~>instances only returns those instances on the current level. So yes you need a recursive approach to walk through the hierarachy. I wrote something similar recently - gimme some time and I'll look it up for you

Unfortunately there's no "simple" way of doing it - particularly if you want to handle both view switching and configs (which complicate matters rather because the bindings get more complicated).

Here's some code I wrote a while back to create a schematic tree - before it was added as a standard feature for the schematic editor: How to print a hierarchy tree of a config based schematic, normal schematic or layout view?

Regards,

Andrew.

Hi Andrew...I see the problem with the config view. The code I was referring to was under the assumption that for each symbol there is a corrsponding schematic in terms of a switch list of names. I'll check out your code...

Hi Max,

Yes, a search with a switch view list is a lot simpler - that can be done fairly simply with a short bit of recursive code.

Andrew

Max & Andrew,

Many thanks for your comments. It's much appreciated.

However, I've really struggled since yesterday to get something working. I tried to extract what i need from Andrew's CCSschTree() code in addition to other threads but to no avail (eg this or this). Also couldnt make progress using your "switch view list search" suggestion.

Not only am i stuck at traversing the hierarchy, but i cant seem to map between cv~>instances and cv~>instanceMasters in order to get the hierarchical instance name.

At this point, I would be eternally grateful for any guidance.

Thanks

Faisal

Hi again,

Finally, I managed to get the following code fairly working as i intend it to. I would be grateful if you can review it and point out its weaknesses.

Thanks

procedure(FAfindInstances(@optional (cv geGetEditCellView()) hierName (visited makeTable('visited nil)) )
    ;printf("===> Decending into = %s %s\n" cv~>libName cv~>cellName)
    foreach(instance cv~>instances
        if( member(instance~>cellName list("dgxnfet" "dgxpfet")) then
            ;
            printf("Found Instance = %s%s\n" hierName instance~>name) 
        else
            unless(visited[instance] 
                visited[instance]=t
                if(ddGetObj(instance~>libName instance~>cellName "schematic") then
                    FAfindInstances(dbOpenCellView(instance~>libName instance~>cellName "schematic") concat(hierName "/" instance~>name "/") visited)
                )
            ) 
        ) 
    ) 
)

Hi Faisal,

I restructured your code formatting to make it readable (not sure if I included the comments in the right place or not - couldn't tell from the wrapped code).

Anyway, it looks fine. I probably would have used dbGetAnyInstSwitchMaster rather than the ddGetObj and dbOpenCellView part, but that's a small change. It's similar to what I would have written (I did start trying to use some classes and methods together with my CCSschTree code, but it's not really designed to operate at the instance level - it's mostly about gathering the different types of cells that are found at each level, rather than visiting every instance).

Regards,

Andrew.