Getting all the design variables in SKILL

Discussion in 'Cadence' started by mm77, Oct 16, 2008.

  1. mm77

    mm77 Guest

    Hi all!
    Is there a way to get all the design variables in a schematic with
    SKILL?

    My purpose is to set all of them to zero.
    This because I have a testbench, with many design variables which
    controls some voltage sources, which I use for several Ocean
    simulations.
    For some simulations, some variables are not used at all, so they
    should be put to zero (or better they should have the default value of
    the CDF parameter they set).

    An alternative would be to use different testbenches for different
    simulations, but I would like to reuse testbenches as much as
    possible.

    For example, suppose I have two simulations scripts that use both
    "tran" analysis, one having some design variables that control the
    pulse characteristics of few vpulse voltage sources, and the other
    simulation script needing only to control another voltage source.

    Using this approach, you end up with may design variables which need
    to be set in each simulation script.
    If I could get all the design variables somehow, I could first set
    them to zero or CDF default, and them just put in my script calls to
    desVar() for the few variables I need there.

    What's the best approach in this case?

    Thanks in advance for any suggestion. I am especially interested in
    knowing how other people use simulation scripts....

    Kind regards,
    Marco
     
    mm77, Oct 16, 2008
    #1
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  2. mm77

    Joel Guest

    You can probably use artGetCellViewDesignVarList which is documented
    in Virtuoso Analog Design Environment SKILL Language Reference. It
    takes a cell view object as an argument and returns a list of design
    variable and value pairs.

    Depending on what you are trying to do, if the schematic window is
    current you can use:

    artGetCellViewDesignVarList(geGetWindowCellView())

    or if you know the name of the library/cell/view:

    artGetCellViewDesignVarList(dbOpenCellViewByType("myLib" "myCell"
    "myView"))

    If I wanted to write an OCEAN script to do some analysis on a design,
    I would probably start by setting up the design in ADE (which allows
    you to pull design variables from the schematic) and then save the
    OCEAN script for the session using, for example, the Session->Save
    Script... menu item. Once I had the initial script I would edit it to
    do what I needed.
     
    Joel, Oct 17, 2008
    #2
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