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 modifying pin names of a symbol 

Last post Tue, Aug 13 2013 10:17 AM by kawan. 9 replies.
Started by kawan 27 Jun 2013 04:39 PM. Topic has 9 replies and 1027 views
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  • Thu, Jun 27 2013 4:39 PM

    • kawan
    • Not Ranked
    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    modifying pin names of a symbol Reply

    I need to grab a symbol, find all the pins and then change the names to include dig_ in front of the original pin names.

    I then need to recrerate the symbol. I want teh symbol to have the same shape and pin locations as the original.

     So I have the following:

     ;test code

    procedure( buildmysymbol()

    pinlist = schSymbolToPinList("zakir_ams" "spi_top" "symbol")
    pat=pcreCompile("dig_")
    pinlist = pcreReplace(pat pinlist "dig1" 0)

    schPinListTosymbol("zakir" "spi_top" "symbol" pinlist)
    )

     

    The cod edoes not work since the pinlist used in  pcreReplace(pat pinlist "dig1" 0) is  a list and not a string.

    Any way to get around this?

     Thanks

    zakir

     

    • Post Points: 20
  • Fri, Jun 28 2013 6:34 AM

    Re: modifying pin names of a symbol Reply

    Zakir,

    procedure( buildmysymbol()
      let((pinlist pat)
        pinlist = schSymbolToPinList("zakir_ams" "spi_top" "symbol")
        pat=pcreCompile("dig_")
        foreach(port pinlist->ports
            port->name=pcreReplace(pat port->name "dig1" 0)
            foreach(pin port->pins
                pin->name=pcreReplace(pat pin->name "dig1" 0)
            )
        )
        schPinListToSymbol("zakir" "spi_top" "symbol" pinlist)
      )
    )

    Regards,

    Andrew.

    • Post Points: 35
  • Fri, Jun 28 2013 4:58 PM

    • kawan
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    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    Re: modifying pin names of a symbol Reply

     Thank You Sir!

    • Post Points: 5
  • Fri, Jun 28 2013 5:53 PM

    • kawan
    • Not Ranked
    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    Re: modifying pin names of a symbol Reply
     

      Andrew,

    What I really wanted to do was a little more complex substituition. But when it did not work, I played with a  simpler substitution which was the example I posted.

    if the pin name has "dig_", I need to remove it.

    if the pin name has "_1v1", I need to remove it.

    so  dig_tx_vcm_1v1_ch1<4:0> will become tx_vcm_ch1<4:0>

    In perl I would do:

      if (/^dig_(.*)_1v1(.*)/)
     {
     $newname = $1.$2;
     print "$newname \n";
     }

    I do not quite understand the pcreCompile & pcreReplace functions. Are there examples of this within the cadence documentations? If you can help with modifying the code you sent, I would appreciate it.

    Or if there is a way for me to use skill to read the pin information into a file ... then I can use perl to modify the file as necessary and then use another skill script to read the modified file and regenerate the symbol. I would be comore comfortable with this but if the skill can do this just as well, I would rather learn with skill. When I just type in the icfb window, the pin list is spewed out. 

    pinlist = schSymbolToPinList("zakir_ams" "spi_top" "symbol")

    How do I pipe this out to a file. My attempts below did not work

     schSymbolToPinList("zakir_ams" "spi_top" "symbol") > ~/spi_pins

     

    thanks

    zakir

     

    • Post Points: 20
  • Mon, Jul 1 2013 3:17 AM

    Re: modifying pin names of a symbol Reply

    Zakir,

    See below. You can do the same kind of things here too (pcre is "Perl Compatible Regular Expression"). Note that I also included fixing the portOrder property too - I hadn't done this before (this is the bit at the end). Probably not too critical, but thought I might as well fix that at the same time.

    procedure( buildmysymbol()
      let((pinlist pat)
        pinlist = schSymbolToPinList("zakir_ams" "spi_top" "symbol")
        pat=pcreCompile("^dig_(.*)_1v1(.*)")
        foreach(port pinlist->ports
            when(pcreExecute(pat port->name)
                port->name=pcreSubstitute(pat "\\1\\2")
            )
            foreach(pin port->pins
                when(pcreExecute(pat pin->name)
                    pin->name=pcreSubstitute(pat "\\1\\2")
                ) 
            )
        )
        pinlist->prop->portOrder=foreach(mapcar portName pinlist->prop->portOrder
            if(pcreExecute(pat portName)  then
                pcreSubstitute(pat "\\1\\2")
            else
                portName
            )
        ) 
        schPinListToSymbol("zakir" "spi_top" "symbol" pinlist)
      )
    )

    Regards,

    Andrew.

    • Post Points: 35
  • Mon, Jul 1 2013 8:48 AM

    • kawan
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    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    Re: modifying pin names of a symbol Reply

     Thank You very much!!

     

    zakir

    • Post Points: 5
  • Fri, Aug 9 2013 11:06 AM

    • kawan
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    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    Re: modifying pin names of a symbol Reply

     Andrew, On another note ... it is a different issue , I can start a new thread if you think so ..

    I will take an empty schematic and instantiate a block that has a few hundred pins on it.

    But I now want to automatically wire each pin  of that block to another pin that has the same identical name.

    The only reason I am doing this is to have  a different symbol view.  The script is essential as it will grab each pin of the instance and wire it to an identical pin. It will eliminate human error if I try to hook it up myself.

    Thanks

    zakir

     

     

    • Post Points: 35
  • Fri, Aug 9 2013 11:39 PM

    Re: modifying pin names of a symbol Reply

    I'm on vacation for the next couple of weeks and won't have email or web access, and so won't be able to answer this or any other question, so I'll leave it to other folks on the forum to answer this for now. 

    Kind Regards,

    Andrew 

    • Post Points: 5
  • Mon, Aug 12 2013 9:38 AM

    • skillUser
    • Top 10 Contributor
    • Joined on Fri, Sep 19 2008
    • Austin, TX
    • Posts 2,569
    • Points 15,600
    Re: modifying pin names of a symbol Reply

    Hi Zakir,

    A quick no-coding approach to this would be to use Create -> Cellview -> From Cellview to create the new schematic from the existing symbol - this will get you all of the pins and their appropriate directions in an otherwise blank cellview.  Then you can place the original symbol in this new schematic and use the option to create wire stubs for all of the pins; this option creates a wire stub on each pin with the name of the pin as a label on the wire - these wires will be logically connected to the schematic pins of the same name, so no additional wiring should be needed.[I'm assuming that you are using at least IC615]

    It sounds like you aren't too concerned about the appearance of this schematic, so hopefully this suggestion will meet your needs?

    Best regards,

    Lawrence.

    • Post Points: 20
  • Tue, Aug 13 2013 10:17 AM

    • kawan
    • Not Ranked
    • Joined on Tue, Jun 25 2013
    • Posts 14
    • Points 205
    Re: modifying pin names of a symbol Reply

     Yes , That does do what I want in an easy way. I have it going that way now.

    Thank You!

    zakir

    • Post Points: 5
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Started by kawan at 27 Jun 2013 04:39 PM. Topic has 9 replies.