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  3. How to select all floating wires in a schematic (both connected...

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How to select all floating wires in a schematic (both connected to terminals or not connected to a terminal)

tramt
tramt over 1 year ago

Hi

How to select all the floating nets in a cell at one time (including floating wires that already connected to a terminal or not connected to a terminal)

I read an article here but it only helps to delete floating nets that are not connected to anywhere

community.cadence.com/.../how-to-select-and-delete-all-the-floating-nets-in-a-cell

Thanks and regards

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  • RobMan
    RobMan over 1 year ago

    A net connected to a terminal is not floating.

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  • AurelBuche
    AurelBuche over 1 year ago in reply to RobMan

    I'm surprised RobMan as your answers are usually more constructive!

    I believe tramt implied wires that are not connected to anything, and wires that are connected to only one terminal.

    Both would raise 'floating net' warnings during check and save but the latter ones are not considered in the script provided in the mentioned support article.

    I would achieve this using schCheck and retrieving the wires associated to the generated warnings (I might have a code to do something similar, if I find an example I will post it later)

    This is the simplest way as it uses the checker which already does what you want.

    It might be overkill as it implies extracting the connectivity etc. and might impact the schematic.

    Otherwise you can analyze wires ends, associated labels etc. but this is much more complicated

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  • RobMan
    RobMan over 1 year ago in reply to AurelBuche

    Apologies if you feel I was not constructive. There is no indication that this question relates to a schematic. The need to identify floating nets/shapes is usually more frequently associated with a layout. To be honest I had never paid detailed attention to the schematic check. If a wire is connected to only one pin then I expect the warning. I now see this does indeed say "floating".

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  • RobMan
    RobMan over 1 year ago in reply to AurelBuche

    Apologies if you feel I was not constructive. There is no indication that this question relates to a schematic. The need to identify floating nets/shapes is usually more frequently associated with a layout. To be honest I had never paid detailed attention to the schematic check. If a wire is connected to only one pin then I expect the warning. I now see this does indeed say "floating".

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  • AurelBuche
    AurelBuche over 1 year ago in reply to RobMan

    No need to apologize, I was just surprised

    RobMan said:
    There is no indication that this question relates to a schematic.

    You cannot say that though...

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