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how to write a SKILL code for PCELL powergrid

techrddyz

Hi all,

I am new to SKILL coding. I am trying to create a power grid PCELL using SKILL. The user can switch on and off layers/vias depending on needs. I found some SKILL code online and modified to meet my need. Now, i can create metals (ex. M3) but I dont know how i can turn it on and off when the user checks on/off the checkbox on the 'Edit Instance Properties' window. please see my code below. 

procedure(powerGridPcell(cv "dnn")
let( (rectRodObj)

Nx=7
temp = 1
for(i 0 Nx
temp = 0.63 * i
rectRodObj = rodCreateRect(
?cvId cv
?layer list("M3" "drawing")
?bBox list(0:temp+0.125 5.04:temp+0.505)
)
);End for i

); let
); procedure


;; Create the PCell, the "drawing routine" is encapsulated in the
;; powerGridPcell function which does all the work

pcDefinePCell(
list(ddGetObj("test_rudy") "power_grid_pcell" "layout")
(
)
let( ((cv pcCellView))
powerGridPcell(cv)
); let
)

;; Create the CDF for the 'l' and 'w' parameters
let( (cellId cdfId)
when(cellId = ddGetObj("test_rudy" "power_grid_pcell")
;; if the cell CDF already exists, delete it
when( cdfId = cdfGetBaseCellCDF(cellId)
cdfDeleteCDF(cdfId)
)
;; create the base cell CDF
cdfId = cdfCreateBaseCellCDF(cellId)
;; create the parameters
cdfCreateParam( cdfId
?name "visibilityM3"
?prompt "M3"
?defValue "true"
?type "boolean"
?display "t"
)

cdfSaveCDF(cdfId)
); when
); let

Thanks

Parents
  • skillUser

    Hi Rudy,

    You need to create a PCell parameter to match the CDF parameter that you created, so call it visibilityM3, and you need to also pass this as an argument to the drawing function.  You can actually start with the drawing function and test that outside of the PCell structure for development and testing purposes, and then later update the PCell to match. But for what you've shown above, the bits you need might look like this:

    
pcDefinePCell(
list(ddGetObj("test_rudy") "power_grid_pcell" "layout")
  (
    (visbilityM3 "TRUE")
  )
  let( ((cv pcCellView))
    powerGridPcell(cv visibilityM3)
  ); let
)

procedure(powerGridPcell(cv m3vis "dt") ;; the template says that the first arg is a db object, second is text string
let( (rectRodObj Nx temp) ;; added Nx and temp to locally defined variables, don't need to declare i

  Nx=7
  temp = 1
  for(i 0 Nx
    when(m3vis=="TRUE"  ;; test the value of the m3vis argument
      temp = 0.63 * i
      rectRodObj = rodCreateRect(
        ?cvId cv
        ?layer list("M3" "drawing")
        ?bBox list(0:temp+0.125 5.04:temp+0.505)
      )
    ); when
  );End for i

); let
); procedure

    As an aside, I'd probably use a different term than 'visibility' since that has a different connotation for layout, here you are choosing whether to CREATE the M3 shapes or not, not whether they are visible. I have not tried or tested the above code!

    Hopefully this helps you.

    Best regards,

    Lawrence.

Reply
  • skillUser

    Hi Rudy,

    You need to create a PCell parameter to match the CDF parameter that you created, so call it visibilityM3, and you need to also pass this as an argument to the drawing function.  You can actually start with the drawing function and test that outside of the PCell structure for development and testing purposes, and then later update the PCell to match. But for what you've shown above, the bits you need might look like this:

    
pcDefinePCell(
list(ddGetObj("test_rudy") "power_grid_pcell" "layout")
  (
    (visbilityM3 "TRUE")
  )
  let( ((cv pcCellView))
    powerGridPcell(cv visibilityM3)
  ); let
)

procedure(powerGridPcell(cv m3vis "dt") ;; the template says that the first arg is a db object, second is text string
let( (rectRodObj Nx temp) ;; added Nx and temp to locally defined variables, don't need to declare i

  Nx=7
  temp = 1
  for(i 0 Nx
    when(m3vis=="TRUE"  ;; test the value of the m3vis argument
      temp = 0.63 * i
      rectRodObj = rodCreateRect(
        ?cvId cv
        ?layer list("M3" "drawing")
        ?bBox list(0:temp+0.125 5.04:temp+0.505)
      )
    ); when
  );End for i

); let
); procedure

    As an aside, I'd probably use a different term than 'visibility' since that has a different connotation for layout, here you are choosing whether to CREATE the M3 shapes or not, not whether they are visible. I have not tried or tested the above code!

    Hopefully this helps you.

    Best regards,

    Lawrence.

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