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How to calculate area for a given schematic

Hello! Every body, I am using cadence IC514 version and a 90nm PDK kit called "gpdk090".
My intention is to calculate area for a given schematic.
I wrote a procedure called "area()" which will calculate area in the current level (means for transistors, capacitors and resistors only).
Now I need to call this procedure for every instance which is not a transistor,cap or a resistor.
I wrote something like this........................
foreach( inst geGetEditCellView()~>instances
   when( inst~>purpose == "cell"
       if( inst~>libName == "gpdk090" then
           area()
       else
           label:
           cv1=dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
           foreach( inst1 cv1~>instances
               when( inst1~>purpose == "cell"
                   if( inst1~>libName == "gpdk090" then
                       area()
                   else
                       goto label
       ]
Can some body guide me in this way...
               Thanks in Advance...
                                                              Prabhakar. K

Parents

IC Layout over 16 years ago

Thanks for your concern towards my problem.......sir,
My intention is to have total area for a given schematic & also drawing rectangles for the instances/blocks which are in top level schematic only.
With the suggestions you had given now I am able to obtain area for the entire schematic......I tried to draw rectangles for the instances which are in toplevel but in vain.......
Please have a look at my new code " area_mod.il" and suggest me........
************************************ area_mod.il**************************************
div_fac = 1f
procedure( area_mod(inst)
if(inst~>cellName == "pmos2v" then
           w1 = cdfParseFloatString(dbGetq(inst "w") )
           l1 = cdfParseFloatString(dbGetq(inst "l") )
           m1 = evalstring(dbGetq(inst "m"))
           f1 = evalstring(dbGetq(inst "fingers"))
           wp = w1 + 1.4u
           lp = f1*l1 + (f1-1)*0.36u + 2u
           AREA = wp*lp
else
       if(inst~>cellName == "nmos2v" then
           w1 = cdfParseFloatString(dbGetq(inst "w") )
           l1 = cdfParseFloatString(dbGetq(inst "l") )
           m1 = evalstring(dbGetq(inst "m"))
           f1 = evalstring(dbGetq(inst "fingers"))
           wn = w1 + 0.6u
           ln = f1*l1 + (f1-1)*0.36u +1.12u
           AREA = wn*ln
else
           if(inst~>cellName == "resnsppoly" then
           w1 = cdfParseFloatString(dbGetq(inst "segW") )
           l1 = cdfParseFloatString(dbGetq(inst "segL") )
           m1 = evalstring(dbGetq(inst "segments"))

           wr = m1*w1 + (m1-1)*0.6u + 0.56u
            lr = l1 + 1.12u
           AREA = wr*lr
else
            if( inst~>cellName == "mimcap" then
           c1 = cdfParseFloatString(dbGetq(inst "c"))
           m1 = evalstring(dbGetq(inst "m"))

           areac = m1*c1
            AREA = areac/div_fac
) ) ) )
AREA
);procedure
procedure(PKsumArea(@optional (cv geGetEditCellView()))
foreach(inst cv~>instances
      if(inst~>libName=="gpdk090" then
totalArea=totalArea+area_mod(inst)
;;;;shall I write 'dbCreateRect(.....) statement here.....for the toplevel transistors/res/caps
else
        when(inst~>purpose=="cell"
   master=dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
   when(maste
        println(master~>cellName)
    PKsumArea(master)
        ;;;;shall I write 'dbCreateRect(.....) statement here.....for the toplevel blocks (after calculating whole block area)

) ) ) )
totalArea
)
PKsumArea()
println(totalArea)
******************************************** end of area_mo.il************************************
I have used ' cdfFofmatFloatString ' for the purpose of drawing rectangles (by formating every value to suffix "p" in other case it's giving errors).
I hope you are understanding my problem...........
I am very very sorry....if you feel inconvinence..
Thanks & regards........
                    Prabhakar. K
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Reply

IC Layout over 16 years ago

Thanks for your concern towards my problem.......sir,
My intention is to have total area for a given schematic & also drawing rectangles for the instances/blocks which are in top level schematic only.
With the suggestions you had given now I am able to obtain area for the entire schematic......I tried to draw rectangles for the instances which are in toplevel but in vain.......
Please have a look at my new code " area_mod.il" and suggest me........
************************************ area_mod.il**************************************
div_fac = 1f
procedure( area_mod(inst)
if(inst~>cellName == "pmos2v" then
           w1 = cdfParseFloatString(dbGetq(inst "w") )
           l1 = cdfParseFloatString(dbGetq(inst "l") )
           m1 = evalstring(dbGetq(inst "m"))
           f1 = evalstring(dbGetq(inst "fingers"))
           wp = w1 + 1.4u
           lp = f1*l1 + (f1-1)*0.36u + 2u
           AREA = wp*lp
else
       if(inst~>cellName == "nmos2v" then
           w1 = cdfParseFloatString(dbGetq(inst "w") )
           l1 = cdfParseFloatString(dbGetq(inst "l") )
           m1 = evalstring(dbGetq(inst "m"))
           f1 = evalstring(dbGetq(inst "fingers"))
           wn = w1 + 0.6u
           ln = f1*l1 + (f1-1)*0.36u +1.12u
           AREA = wn*ln
else
           if(inst~>cellName == "resnsppoly" then
           w1 = cdfParseFloatString(dbGetq(inst "segW") )
           l1 = cdfParseFloatString(dbGetq(inst "segL") )
           m1 = evalstring(dbGetq(inst "segments"))

           wr = m1*w1 + (m1-1)*0.6u + 0.56u
            lr = l1 + 1.12u
           AREA = wr*lr
else
            if( inst~>cellName == "mimcap" then
           c1 = cdfParseFloatString(dbGetq(inst "c"))
           m1 = evalstring(dbGetq(inst "m"))

           areac = m1*c1
            AREA = areac/div_fac
) ) ) )
AREA
);procedure
procedure(PKsumArea(@optional (cv geGetEditCellView()))
foreach(inst cv~>instances
      if(inst~>libName=="gpdk090" then
totalArea=totalArea+area_mod(inst)
;;;;shall I write 'dbCreateRect(.....) statement here.....for the toplevel transistors/res/caps
else
        when(inst~>purpose=="cell"
   master=dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
   when(maste
        println(master~>cellName)
    PKsumArea(master)
        ;;;;shall I write 'dbCreateRect(.....) statement here.....for the toplevel blocks (after calculating whole block area)

) ) ) )
totalArea
)
PKsumArea()
println(totalArea)
******************************************** end of area_mo.il************************************
I have used ' cdfFofmatFloatString ' for the purpose of drawing rectangles (by formating every value to suffix "p" in other case it's giving errors).
I hope you are understanding my problem...........
I am very very sorry....if you feel inconvinence..
Thanks & regards........
                    Prabhakar. K
Cancel
Vote Up 0 Vote Down

Cancel

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