setPG.tcl

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###############################################################################
# Copyright (c) 2009-2024 by Altair Engineering, Inc.
# All rights reserved.
#
# Altair Engineering, Inc. makes this software available as part of the Vision
# tool platform.  As long as you are a licensee of the Vision tool platform
# you may make copies of the software and modify it to be used within the
# Vision tool platform, but you must include all of this notice on any copy.
# Redistribution without written permission to any third party, with or
# without modification, is not permitted.
# Altair Engineering, Inc. does not warrant that this software is error free
# or fit for any purpose.  Altair Engineering, Inc. disclaims any liability for
# all claims, expenses, losses, damages and costs any user may incur as a
# result of using, copying or modifying the software.
# =============================================================================
#   @userware
#       Find Power/Ground Nets
#   @section
#       Modify the Loaded Database
#   @description
#       Flag all nodes that matches one of the given patterns with a power,
#       negpower or ground flag to get a more readable schematic.
#   @files
#       setPG.tcl
#   @example
#       demo/spice/gl85.sp
#   @cmdline
#       -hspice @example[0]
#       -userware @files[0]
#   @tag
#       spice
###############################################################################


# -----------------------------------------------------------------------------
# setPG - This is the main function which processes the database and flag all
#         nodes that matches one of the given patterns with a power, negpower
#         or ground flag.
# -----------------------------------------------------------------------------
#
proc setPG {db} {
    ##
    # Configure the patterns for power, negpower and ground nodes.
    #
    set powerNodesPattern    {{\+[0-9]+V} POWER}
    set groundNodesPattern   {GND[0-9]*}
    set negPowerNodesPattern {{\-[0-9]+V}}

    ##
    # Return if the database is empty.
    #
    if {$db == {}} {
        return
    }

    ##
    # Loop over all modules.
    #
    $db foreach module module {
        ##
        # Loop over all nets in each module.
        #
        $db foreach net $module net {
            ##
            # Get the name of the net.
            #
            set netName [$db oid oname $net]

            ##
            # Lop over all power patterns and flag the net as power
            # if a pattern matches.
            #
            foreach pattern $powerNodesPattern {
                if {[regexp $pattern $netName]} {$db flag $net set power}
            }

            ##
            # Lop over all negpower patterns and flag the net as negpower
            # if a pattern matches.
            #
            foreach pattern $negPowerNodesPattern {
                if {[regexp $pattern $netName]} {$db flag $net set negpower}
            }

            ##
            # Lop over all ground patterns and flag the net as ground
            # if a pattern matches.
            #
            foreach pattern $groundNodesPattern {
                if {[regexp $pattern $netName]} {$db flag $net set ground}
            }
        }
    }

    ##
    # Inform the GUI that the database was modified.
    #
    gui database modified

    ##
    # Rescan symlib for P/G symbols and regenerate the schematic to
    # use the new symbols in the schematic.
    #
    $db symlib scan
    gui schem regenerate
}


##
# Use gui database runOrRegisterChangedCallback to immediately run
# setPG
# if we have a database, or otherwise register the proc to be executed after
# the database is available.
#
gui database runOrRegisterChangedCallback setPG