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How to preserve the termOrder in the CDF parameters and the subckt in order in netlist when copying a schematic view

MFahmy

Hi, 

I have noticed that when I create a netlist for a given schematic and then copy this schematic to a different library (no editing done) and netlist the copy I get different pin ordering in the pin list, and when looking in the CDF parameters termOrder I see they are different

- is there a way to preserver the termOrder when copying the schematic view 

- if not, how can I read the term order of a given schematic and set it in the copy from SKILL

Here is a snippet of the code I used to reproduce the issue

envSetVal("spectre.envOpts" "setTopLevelAsSubckt" `boolean t)
simulator('spectre)
design(lib_orig cell_orig view_orig)
createNetlist()

let((cv cv_new)
cv_orig=dbOpenCellViewByType(lib_orig cell_orig view_orig "schematic" "r")
dbCopyCellView(cv_orig lib_new cell_new view_new nil nil t)
dbClose(cv_orig)


cv_new=dbOpenCellViewByType( lib_new cell_new view_new "schematic" "a")
schCheck(cv_new)
dbSave(cv_new)
dbClose(cv_new)
)
design(lib_new cell_new view_new)
createNetlist()

comparing the two resulting netlists, I see that the terminals' order is different, and comparing the termOrder in the CDF Editor for the two schematic views , I see it is also different

Virtuoso version ICADVM20.1-64b 05/11/2023 
Sub-version ICADVM20.1-64b.500.28.EHF13629

Thanks, 

Fahmy 

Parents Reply Children
  • in reply to Andrew Beckett

    I believe only the schematic was copied, as I used the dbCopyCellView(cv_orig lib_new cell_new view_new nil nil t) command

    maybe I am missing something obvious, but how can I copy the data.dm from my skill code along with the schematic 

    Thanks, 

    Fahmy 

  • in reply to MFahmy

    Fahmy,

    Rather than copying the entire data.dm (this is something that the library manager copy offers), you could just use cdfCopyCDF()

    Andrew

  • in reply to Andrew Beckett

    Thanks, it worked, but I noticed that after I copy the cdf when doing the cell copy, if later in the flow a check and save (schCheck(), dbSave()) is done, the termOrder is rest , although nothing really has changed related to the pins and some times nothing at all, is this expected ? is there a way indicate that the termOrder does not need update after a schCheck, I am using cdfCopyCDF with "baseCellData"

    Thanks,

    Fahmy 

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