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 Concept HDL - global signal shorted 

Last post Fri, Jan 29 2010 6:36 PM by DavidP. 4 replies.
Started by DavidP 27 Jan 2010 01:40 PM. Topic has 4 replies and 3114 views
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  • Wed, Jan 27 2010 1:40 PM

    • DavidP
    • Not Ranked
    • Joined on Thu, Jul 17 2008
    • Geneva, Geneva
    • Posts 6
    • Points 90
    Concept HDL - global signal shorted Reply

    Hello,

    I have the following problem:

    In the schematic if I change from a power symbol  to a another one (like 2.5V to 1.5V). The Check routine returns me an error:

    Severity : Error (HDL Direct)
    Description : ERROR(SPCOHD-541): Global signal P2V5 is shorted with another global signal P1V5.
    Two global signals can not be shorted.

    If you want to short these global signals, add them in Allowed Global Shorts list in Design Entry HDL setup options.
     

    In fact the signal attached to the wire can not be overwritten when the power symbol is changed, it keeps the old value.

    Any Idea how to reset it ?

     

    • Post Points: 20
  • Thu, Jan 28 2010 9:47 PM

    • Khurana
    • Top 25 Contributor
    • Joined on Thu, Aug 14 2008
    • Posts 238
    • Points 3,315
    Re: Concept HDL - global signal shorted Reply

    Do you want (global) signals to be shorted and if that's the case, is your question how to make the error go away OR are you saying that you don't want the global signals shorted in which case your question is how to make the tool to not report this error?

    If you want global signals shorted (i.e. your design is good) then click Tools > Options > Output > specify the names of global signalsin Signal1 and Signal2 columns

    • Post Points: 20
  • Fri, Jan 29 2010 2:31 PM

    • DavidP
    • Not Ranked
    • Joined on Thu, Jul 17 2008
    • Geneva, Geneva
    • Posts 6
    • Points 90
    Re: Concept HDL - global signal shorted Reply

    I'm aware how to short 2 global signals. 

    My problem is:

    I have a power symbol with 1.5V connected to a wire and I changed my mind so I want this wire to be on 2.5V.

    So I change my power symbol for 2.5V but the signal proprety on the wire is still 1.5V (the old value) and it creates a short during the check. I would like to know how to force my wire to update to the new value.

    For a single change, I can delete my wires and do it again but for a full board with tens of changes, I would like to have a global command.

     

     

    • Post Points: 20
  • Fri, Jan 29 2010 3:27 PM

    • steve
    • Top 10 Contributor
    • Joined on Fri, Jul 18 2008
    • Woking, Surrey
    • Posts 1,248
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    Re: Concept HDL - global signal shorted Answer Reply

    Try the global property change Tools - Global Change - Global Property change, the property is HDL_POWER = 1V5 to HDL_POWER = 2V5. I would suggest a backup of the circuit first though as there is no undo for this command. You might need to expand your design first as well.

    • Post Points: 20
  • Fri, Jan 29 2010 6:36 PM

    • DavidP
    • Not Ranked
    • Joined on Thu, Jul 17 2008
    • Geneva, Geneva
    • Posts 6
    • Points 90
    Re: Concept HDL - global signal shorted Reply

    Thanks

    I did somethink similar.

    Global Proprety Delete and I choose SIG_NAME / 1V5. Everything has been removed and then restored to a good value after a save command.

     

     

    • Post Points: 5
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Started by DavidP at 27 Jan 2010 01:40 PM. Topic has 4 replies.