Automatically reverse bus order in schematic

Paul,

What kind of netlist are you importing, and which IC sub-version are you using? Just so that I can focus my attention in the right place...

Andrew

Its the same circuits I mentioned here -> https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/47255/spicein-fails-for-existing-symbol-with-bus-pins

I have a Spice netlist with bus pins, which I want to import into an existing cell. Since the import does not work directly, I import it into a dummy cell and want to copy the schematic to the actual cell. However, because the bus order and pin directions are wrong, I have to manually edit the schematic every time.

The virtuoso version I use is ICADVM20.1-65b.500.17 (it should be fairly recent)

Paul,

There does appear to have been one request for control over the order, but it was voided because the customer decided they didn't need it after all. So you might want to request control over the order via customer support.

This code (I think) should do the job (at least from my very simple testing):

procedure(CCFreverseBusOrder(@key (cv geGetEditCellView()) (check t) save)
    let((busPattern)
        busPattern=pcreCompile("^(\\w*)<(\\d+):(\\d+)>$")
        ;----------------------------------------------------------------
        ; First wire labels
        ; Note this is not attempting to rename buses which are part of
        ; a bundle
        ;----------------------------------------------------------------
        foreach(shape cv~>shapes
            when(shape~>objType=="label" && shape~>layerName=="wire" &&
                    pcreExecute(busPattern shape~>theLabel)
                shape~>theLabel=pcreSubstitute(busPattern "\\1<\\3:\\2>")
            )
        )
        ;----------------------------------------------------------------
        ; Then the terminals
        ;----------------------------------------------------------------
        foreach(term cv~>terminals
            when(pcreExecute(busPattern term~>name)
                ;--------------------------------------------------------
                ; Slightly messy approach - can't directly rename the terminal
                ; as it complains about existing terminal, so temporarily add
                ; a dummy prefix and then rename back again
                ;--------------------------------------------------------
                term~>name=pcreSubstitute(busPattern "_RbODuMMy\\1<\\2:\\3>")
                term~>name=pcreSubstitute(busPattern "\\1<\\3:\\2>")
            )
        )
        when(check
            schCheck(cv)
        )
        when(save
            dbSave(cv)
        )
        t
    )
)

Regards,

Andrew

Thank you, this works well for me. I modified it slightly to also take care of the pin direction. It seems, you already solved every problem at some point in the past

Unknown said:

It seems, you already solved every problem at some point in the past

If only! I wrote the code yesterday (didn't take long) in response to this. I also ended up filing two CCRs:

2498066 Merge BusBits produces incorrect schematic with square bracket as delimiter
2498083 SPICEIN with Merge BusBits fails if symbol already exists

(the second one was the issue you mentioned in your previous post - I didn't see one filed, so I thought I'd do it whilst I had the test case ready).

Andrew

Hi Andrew,

Whatever you write on the fly like this one, are they part of any skill code library in support site? I know there is a skill code library in support site but do these code snippets get added over there? Any plan of doing so?

It would be useful

Thanks

-Ramakrishnan

Hi Ramakrishna,

Sometimes I do create articles for code I post here - but it's additional effort and I don't always have time to put together a full description and publish it as an article. Specifically adding into the "SKILL Library" is not something I typically do (I must admit I don't know who owns that these days), although I do typically get any articles I write related to calculator functions added into the SKILL calculator functions library (as that process is something I am aware of).

Since support.cadence.com also searches the community, it's not necessarily a requirement to specifically publish an article. For example, if you use the  "All Content" search and search for CCFreverseBusOrder then it will find this thread...

Andrew

Hi Ramakrishna,

Sometimes I do create articles for code I post here - but it's additional effort and I don't always have time to put together a full description and publish it as an article. Specifically adding into the "SKILL Library" is not something I typically do (I must admit I don't know who owns that these days), although I do typically get any articles I write related to calculator functions added into the SKILL calculator functions library (as that process is something I am aware of).

Since support.cadence.com also searches the community, it's not necessarily a requirement to specifically publish an article. For example, if you use the  "All Content" search and search for CCFreverseBusOrder then it will find this thread...

Andrew

Hi Andrew,

I understand. Thank you.

-Ramakrishnan