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Customised Unconnected net report

tmd63

Does anyone have or know how to make a customised unconnected net report?

I need to have a report that shows similar to the 'unconnected pins report'. But it also shows the distance of the unconnected pins (X1-X2 and Y1-Y2 for example, or even further [[X1-X2]^2+[Y1-Y2}^2]^0.5 so it gives the distance between the X1,Y1 and X2,Y2 positions).

I could import into excel and extract the information but this is long and involved and prone to errors, if there is an easier report method I would like to know how.

  • in reply to tmd63

    There isn't a license required for SKILL, you can create SKILL scripts with a text editor and load them with any license level of PCB Editor. "skill" in PCB Editor Command Window will start the SKILL Command function and SKILL scripts can be, "carefully", experimented with from there. Check the PCB SKILL forum and resources on the Cadence Support site for documentation, examples, and so on.

  • in reply to oldmouldy

    It appears to be a sub-set of Virtuoso??

    SKILL uses the Cadence Design Framework II license (License Number 111), which is checked out at the launch of the skill executable or the workbench.

  • below is an example skill file 'custom_ucn.il"

    procedure((custom_ucn \@optional FileName)
    prog((outport OutputName NetCnt RatCnt Total startPin endPin String)
    if( FileName then
    (OutputName = strcat(simplifyFilename(".") "/" FileName))
    (OutputName = FileName)
    else
    (OutputName = strcat(simplifyFilename(".") "/ucn.rpt"))
    )
    if(isFile(OutputName) then
    unless(deleteFile(OutputName)
    (axlMsgPut "ERROR: could not remove existing file %s" OutputName)
    return()
    )
    )
    if((outport = outfile(OutputName)) then
    (Total = 0)
    foreach(net ((axlDBGetDesign)->nets)
    (RatCnt = 0)
    foreach(rat (net->ratsnest)
    unless( rat->pinsConnected
    (RatCnt++)
    when( eq(RatCnt 1)
    fprintf(outport "%s\n" net->name)
    )
    (startPin = car(rat->pins))
    (endPin = cadr(rat->pins))
    when(startPin && endPin
    fprintf(outport "From: %s.%s (%f %f) " startPin->component->name startPin->number xCoord(startPin->xy) yCoord(startPin->xy))
    fprintf(outport "To: %s.%s (%f %f) " endPin->component->name endPin->number xCoord(endPin->xy) yCoord(endPin->xy))
    fprintf(outport "Delta: (%f %f)\n" difference(xCoord(startPin->xy) xCoord(endPin->xy)) difference(yCoord(startPin->xy) yCoord(endPin->xy)))
    )
    )
    )
    (Total = Total + RatCnt)
    )
    (axlMsgPut "%d ratsnests written to %s" Total OutputName)
    else
    (axlMsgPut "ERROR: could not open output file %s" OutputName)
    return()
    )
    )
    )
    axlCmdRegister("custom_ucn" 'custom_ucn)


    Below is the allegro.jrl file showing how to load & run it:

    \i (00:00:06) generaledit
    \i (00:00:09) skill '`'load "custom_ucn.il"`''
    (00:00:09) t
    \i (00:00:15) custom_ucn
    \t (00:00:15) 2 ratsnests written to C:\Temp/ucn.rpt
    \i (00:00:16) generaledit

    and below is the output file contents:

    XDMA_EVENT_INTR0
    From: P2.17 (1281.000000 687.500000) To: R18.2 (1650.000000 430.000000) Delta: (-369.000000 257.500000)
    DGND
    From: P2.12 (1494.000000 537.500000) To: P2.10 (1494.000000 487.500000) Delta: (0.000000 50.000000)

  • in reply to DavidJHutchins

    Thank you.

    I take it this is a SKILL file and not a Common LISP file as some of the operations are not know by Common LISP interpreters.

    On the lines
    (startPin = car(rat->pins))
    (endPin = cadr(rat->pins))
    Should they both read cadr(rat->pins)?

  • in reply to DavidJHutchins

    Would this work?

    (diffX = difference(xCoord(startPin->xy) xCoord(endPin->xy)))
    (diffY = difference(yCoord(startPin->xy) yCoord(endPin->xy)))
    (startPin = cadr(rat->pins))
    (endPin = cadr(rat->pins))
    when(startPin && endPin
    fprintf(outport "From: %s.%s (%f %f) " startPin->component->name startPin->number xCoord(startPin->xy) yCoord(startPin->xy))
    fprintf(outport "To: %s.%s (%f %f) " endPin->component->name endPin->number xCoord(endPin->xy) yCoord(endPin->xy))
    fprintf(outport "Delta: (%f %f) " diffX diffY
    fprintf(outport "Length: (%f)\n " sqrt( ( diffX * diffX) + ( diffY * diffY))

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