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Obtain all 'shorting' errors via skill

khuranav007

Hello,

Is there a way to filter 'shorting' errors from list of all DRCs in the design using Allegro Skill?  We short differently named nets together which leads to DRCs - is there a way to obtain a list of these errors (DRCs) as a result of shorting nets by the way of SKILL?  We do not add NET_SHORT property to suppress these DRCs.

Thanks!

Parents
  • khuranav007
    0 in reply to eDave

    Hi Dave,

    Waiving a DRC is not the goal.  The goal is to find 'shorting' errors by the way of Skill.

    Thanks!

Reply
  • khuranav007
    0 in reply to eDave

    Hi Dave,

    Waiving a DRC is not the goal.  The goal is to find 'shorting' errors by the way of Skill.

    Thanks!

Children
  • RFinley
    0 in reply to khuranav007

    The code I shared iterates through DRC errors flagged by Allegro.  Do you want to calculate object spacing in SKILL? 

  • eDave
    +1 in reply to khuranav007

    It's not difficult:

    drcs = setof(drc, axlDBGetDesign() ->drcs, drc ->type == "NET SPACING CONSTRAINTS" && zerop(axlMKS2UU(drc ->actual)))
    foreach(drc, drcs
    netnames = mapcar(lambda((vio), vio ->net ->name), drc ->violations)
    )

  • khuranav007
    0 in reply to RFinley

    The goal is to find only those errors that are generated from shorting 2 differently named nets - then obtain net names of the 2 offending elements.

    I think I can use DavidHutchins suggestion for what I am after.  The intent of posting this question was to find out if there's any other way to finding only 'shorting' errors and based on DavidHutchins response there isn't.  That is, for each error figure out 'Net Spacing Constraint' type and if the actual constraint value is 0 and net names of 2 elements are different values then that error is due to shorting of nets.

  • khuranav007
    0 in reply to eDave

    Hi Dave,

    Thanks very much and brilliant as usual.  I am trying to decipher this code and may have questions.

    Varun

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