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  3. How to Assign Net Names Correctly in SKILL Code for Schematic...

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How to Assign Net Names Correctly in SKILL Code for Schematic Generation

csonnadara
csonnadara 9 months ago

I am trying to generate a schematic from the SKILL code. However, I am unable to assign the net name correctly.  My skill code has the following steps: to identify nets by the terminal of devices and label them. Could you suggest how to label 'net2' correctly? 

# Create the wire
dbCreateNet(cvID,"vi")
schCheck(cvID)
wireID[0] = schCreateWire(cvID, "route", "full", [A, end_point], 0, 0, 0)
schCheck(cvID)
schCreateWireLabel(cvID, wireID[0], label_position, "vi", "lowerLeft", "R0", "fixed", 0.05, "nil")
schCheck(cvID)

Virtuso Studio edition : IC23.1-64b.ISR7.27

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  • Andrew Beckett
    Andrew Beckett 9 months ago

    That code doesn't really give enough detail and actually it's wrong (it has syntax errors and also passes the wrong values to some arguments). I put together an example using gpdk045 and specifying some coordinates to allow it to complete:

    cvID=geGetEditCellView()
    A=-0.75:0.1875
    end_point=-1:0
    label_position=-1.25:0.125
    wireID=makeVector(10)
    master=dbOpenCellViewByType("gpdk045" "nmos1v" "symbol")
    inst=dbCreateInst(cvID master "M1" end_point "R0")
    ; Create the wire
    dbCreateNet(cvID,"vi")
    schCheck(cvID)
    ; this can't' be right, as the syntax for the list of points is wrong.
    ;wireID[0] = schCreateWire(cvID, "route", "full", [A, end_point], 0, 0, 0)
    wireID[0] = schCreateWire(cvID, "route", "full", list(A end_point), 0, 0, 0)
    schCheck(cvID)
    ; this also can't be right, because the return value of schCreateWire is a list of dbIds for the
    ; wire, and the last argument shouldn't be a string
    ;schCreateWireLabel(cvID, wireID[0], label_position, "vi", "lowerLeft", "R0", "fixed", 0.05, "nil")
    schCreateWireLabel(cvID, car(wireID[0]), label_position, "vi", "lowerLeft", "R0", "fixed", 0.05, nil)
    schCheck(cvID)
    

    This works fine:

    I presume it can't have just been the typos in the code (because the wires wouldn't even have been created, let alone the write labels), but maybe it was something in the parts of the code you didn't share?

    Andrew

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  • csonnadara
    csonnadara 9 months ago in reply to Andrew Beckett

    Hello Andrew,

    Thank you for the clarification; the provided code works without issues with the SKILL IDE. 

    My code is part of large code written with Python <-> SKILL bridge (https://unihd-cag.github.io/skillbridge/index.html). When posing data to the forum, I made mistakes while manually converting Python to SKILL. Appreciate your effort in helping, even with errors. 

    However, I still face issues when using the Python—SKILL bridge. I get the created wire, but the created wire label and net name are different. I might need to discuss this with the Python <-> SKILL bridge. Any insight into the matter would be beneficial. Thank you

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  • csonnadara
    csonnadara 9 months ago in reply to Andrew Beckett

    Hello Andrew,

    Thank you for the clarification; the provided code works without issues with the SKILL IDE. 

    My code is part of large code written with Python <-> SKILL bridge (https://unihd-cag.github.io/skillbridge/index.html). When posing data to the forum, I made mistakes while manually converting Python to SKILL. Appreciate your effort in helping, even with errors. 

    However, I still face issues when using the Python—SKILL bridge. I get the created wire, but the created wire label and net name are different. I might need to discuss this with the Python <-> SKILL bridge. Any insight into the matter would be beneficial. Thank you

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