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 Pin Connection of Two instances in Order 

Last post Wed, Jun 3 2009 8:59 AM by mobileee. 5 replies.
Started by mobileee 03 Jun 2009 07:11 AM. Topic has 5 replies and 2463 views
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  • Wed, Jun 3 2009 7:11 AM

    • mobileee
    • Not Ranked
    • Joined on Tue, Jun 2 2009
    • Kharagpur, West Bengal
    • Posts 11
    • Points 170
    Pin Connection of Two instances in Order Reply

    Hi All, 

    I am able to create config view and extracting netlist from the config view in a simpler way. I will put my SKILL code here soon. But suggest me one thing, when ever I am connecting the pins of two instances by skill code ( schCreateWire ) they are getting connected in random order i.e. pin A of instance I0 is getting connected with pin B of I2 instead of getting connected to pin A of I2 . I want to connect the nets of same pins of two insatances ( i.e. pin A of I0 to pin A of I1 ). Please suggest some way to connect the pins properly.

    • Post Points: 20
  • Wed, Jun 3 2009 7:16 AM

    Re: Pin Connection of Two instances in Order Reply

    As I said in the other post, without seeing your code, it's pretty much impossible to guess what you're doing wrong. schCreateWire creates wires between two coordinates, so presumably you just got the coordinates wrong. I doubt anything is really random.

    Andrew.

    • Post Points: 5
  • Wed, Jun 3 2009 7:32 AM

    • mobileee
    • Not Ranked
    • Joined on Tue, Jun 2 2009
    • Kharagpur, West Bengal
    • Posts 11
    • Points 170
    Re: Pin Connection of Two instances in Order Reply
    Hi Andrew,
     
    I am giving the code below.
     
    ################### SKILL CODE starts HERE ###################
     
    ddUpdateLibList()
    if(ddGetObj("myLib" "cell1" "symbol")
     then ddDeleteLocal(ddGetObj("myLib" "cell1" "symbol" ""))
     else printf("no symbol"))
    ;if(ddGetObj("myLib1" "cell3" "symbol")
    ; then ddDeleteLocal(ddGetObj("myLib1" "cell3" "symbol" ""))
    ; else printf("no symbol"))
    if(ddGetObj("myLib" "cell2" "schematic")
     then ddDeleteLocal(ddGetObj("myLib" "cell2" "schematic" ""))
     else printf("no schematic"))
    editor = "touch"
    schViewToView("myLib" "cell1" "myLib" "cell1" "veriloga" "symbol" "ahdlToPinList" "schPinListToSymbol")
    ;schViewToView("myLib" "deb_pal" "myLib" "deb_pal" "veriloga" "symbol" "ahdlToPinList" "schPinListToSymbol")
    ddUpdateLibList()
    let( (i x y u v d_cellview d_master d_inst wireSpace wireWidth wireLength instTermBbox instTermBboxInCv instTermLLX instTermLLY instTermURX instTermURY          wireOriginX wireOriginY deltaX deltaY wireLabel wireOrientation wireJustification wireEndX wireEndY termWire)
    declare(a[1110])
    i=0
    x=0.0
    y=1.5
    u=2
    v=0
    wireSpace=0.0625
    wireWidth=0
    wireLength=0.6
    ddUpdateLibList()
    editor = "touch"
    d_cellview = dbOpenCellViewByType("myLib" "cell2" "schematic" "schematic" "w")
    d_master1 = dbOpenCellViewByType("myLib" "cell1" "symbol" "schematicSymbol" "r")
    d_master2 = dbOpenCellViewByType("myLib1" "cell3" "symbol" "schematicSymbol" "r")
    schCreateInst(d_cellview d_master1 nil  x:y "R0")
    schCreateInst(d_cellview d_master2 nil  u:v "R0")
    foreach( inst d_cellview~>instances
       printf( "Instance : %s\n" inst~>name)
       foreach( instTerm inst~>instTerms
          instTermBbox = car(instTerm~>term~>pins~>fig~>bBox)
       instTermBboxInCv = dbTransformBBox(instTermBbox
                          inst~>transform)
       printf(" Instance Terminal = %s : absBbox = %L :
                relBbox=%L\n" instTerm~>name
       instTermBbox instTermBboxInCv)
       instTermLLX=xCoord(lowerLeft(instTermBboxInCv))
       instTermLLY=yCoord(lowerLeft(instTermBboxInCv))
       instTermURX=xCoord(upperRight(instTermBboxInCv))
       instTermURY=yCoord(upperRight(instTermBboxInCv))
       wireOriginX=(instTermLLX+instTermURX)/2
       if( (instTerm~>name == "CL<2:0>" || instTerm~>name == "tmin<3:0>" || instTerm~>name == "dsp<1:0>" || instTerm~>name == "bias_rdy" || instTerm~>name == "buck_en" || instTerm~>name == "forcePWM" || instTerm~>name == "ss_speedup_mask" || instTerm~>name == "tsd_n" || instTerm~>name == "uvlo_in" || instTerm~>name == "testos" || instTerm~>name == "tm" || instTerm~>name == "buck_rdy" || instTerm~>name == "clk" || instTerm~>name == "PVDD" || instTerm~>name == "PGND") then
        a[i] = wireOriginX
        i++
        wireOriginY=(instTermLLY+instTermURY)/2
        a[i] = wireOriginY
        i++
       )
       case((instTerm~>name)
        ("CL<2:0>"
        deltaX=0
        deltaY=wireLength
        wireLabel="CL<2:0>"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
          ("tmin<3:0>"
        deltaX=0
        deltaY=wireLength
        wireLabel="Tmin<3:0>"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
          ("dsp<1:0>"
        deltaX=0
        deltaY=wireLength
        wireLabel="dsp<1:0>"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
          ("bias_rdy"
        deltaX=0
        deltaY=wireLength
        wireLabel="bias_rdy"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
         ("buck_en"
        deltaX=0
        deltaY=wireLength
        wireLabel="buck_en"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("forcePWM"
        deltaX=0
        deltaY=wireLength
        wireLabel="forcePWM"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("ss_speedup_mask"
        deltaX=0
        deltaY=wireLength
        wireLabel="ss_speedup_mask"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("tsd_n"
        deltaX=0
        deltaY=wireLength
        wireLabel="tsd_n"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("uvlo_in"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("testos"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("tm"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("PGND"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("buck_rdy"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("clk"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )
            ("PVDD"
        deltaX=0
        deltaY=wireLength
        wireLabel="uvlo_in"
        wireOrientation="R0"
        wireJustification="lowerRight"
      )

      (t
        printf("Unknown Terminal !!!! \n")
        )
      )
       )
       )
    termWire=schCreateWire(d_cellview "draw" "full" list(a[0]:a[1] a[30]:a[31]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[2]:a[3] a[32]:a[33]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[4]:a[5] a[34]:a[35]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[6]:a[7] a[36]:a[37]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[8]:a[9] a[38]:a[39]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[10]:a[11] a[40]:a[41]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[12]:a[13] a[42]:a[43]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[14]:a[15] a[44]:a[45]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[16]:a[17] a[46]:a[47]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[18]:a[19] a[48]:a[49]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[20]:a[21] a[50]:a[51]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[22]:a[23] a[52]:a[53]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[24]:a[25] a[54]:a[55]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[26]:a[27] a[56]:a[57]) wireSpace wireSpace wireWidth)
    termWire=schCreateWire(d_cellview "draw" "full" list(a[28]:a[29] a[58]:a[59]) wireSpace wireSpace wireWidth)
    schCheck(d_cellview)
    getWarn()
    dbSave(d_cellview)
    dbClose(d_cellview)
    deNew('(nil ?libname "myLib" ?cellname "cell2" ?viewName "schematic" ?viewType "config"))
    hiiSetCurrentForm('deNewForm)
    deNewForm->deToolName->value = "Hierarchy-Editor"
    hiFormDone(deNewForm)
     
     
     
    ################### SKILL CODE ends HERE ####################
     
     
    In the above code symbol of the cell3 has about 40 pins including those mentioned in the case statements. In the symbol of cell1 contains only those pins mentioned in case statement. I want to connect the pin say "buck_en" of symbol of cell1 with buck_en of symbol cell3. But the above code generates the schematic where the "buck_en" of symbol of cell1 is getting connected with some other pins of symbol of cell3 but not getting connected with "buck_en". That's the problem. Also I am not able to add label to the created wire.
     
    Hope now you have got a clear idea what I am trying to do. Please suggest a suitable solution of the above problem.
    • Post Points: 20
  • Wed, Jun 3 2009 8:10 AM

    Re: Pin Connection of Two instances in Order Reply

    It's very hard to read the code, because the formatting is terrible. Anyway, the key problem is that you are building the array inside a loop:

       a[i] = wireOriginX
        i++
        wireOriginY=(instTermLLY+instTermURY)/2
        a[i] = wireOriginY
        i++

    but the order of the loop is completely dependent on the database - you just have a foreach loop over the instances. That seems a very dangerous and illogical thing to do.

    A far better approach would be to have a function which allowed you to find the coordinates of a particular pin on a particular named instance - something like:

        defun(ABgetPinPositions (cellView)
    	let((positionArray pin)
    	    positionArray=makeTable("pinPositions" nil)
    	    foreach(terminal cellView->terminals
    		pin=car(terminal->pins)
    		when(pin
    		    positionArray[terminal->name]=centerBox(pin~>fig~>bBox)
    		)
    	    )
    	    positionArray
    	)
        ) ; defun getPinPositions
    

    This returns a has of pin positions for a particular master, indexed by pin name. I'd probably then keep a hash of all these hash tables indexed by cellView. You can then look up the location of a particular pin name in a particular cellView, and transform it (using dbTransformPoint) using the transform of the instance of that cellView, and do the same for the other instance and pin you're trying to connect to.

    That way you can then describe your wiring as a set of connections from pin A of I1 to pin B of I2 and so on. No need for any assumed orders of the database.

    Sorry for a not particularly complete example - I wanted to outline the principle. I think your code at the moment has too many assumptions hard coded in - better to try to make it more generic - give  yourself the ability to create wires between pairs of named instance/pin combinations, and you'll find it much easier.

    Regards,

    Andrew.

     

    • Post Points: 5
  • Wed, Jun 3 2009 8:28 AM

    • mobileee
    • Not Ranked
    • Joined on Tue, Jun 2 2009
    • Kharagpur, West Bengal
    • Posts 11
    • Points 170
    Re: Pin Connection of Two instances in Order Reply
    Hi Andrew,

    Sorry for posting twice. I am trying your suggestions right now.
    • Post Points: 5
  • Wed, Jun 3 2009 8:59 AM

    • mobileee
    • Not Ranked
    • Joined on Tue, Jun 2 2009
    • Kharagpur, West Bengal
    • Posts 11
    • Points 170
    Re: Pin Connection of Two instances in Order Reply
    Hi Andrew,

    I am very sorry to inform you that I am unable to capture the idea you provided. I am unable to code the program in the way you suggested with the help of functions. Can you please suggest any other way? Actually, I am not getting into the idea properly.

    Thanks..
    • Post Points: 5
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Started by mobileee at 03 Jun 2009 07:11 AM. Topic has 5 replies.