Need help in writing Skill for routing between two different MOS

Raghu,

Well, if you have the instID and termName of the terminal you're trying to locate, then you'd do something like this:

term=dbFindTermByName(instID~>master termName)
foreach(pin term~>pins
  foreach(fig pin~>figs
    center=centerBox(fig~>bBox)
    centerTopCoord=dbTransformPoint(center instID~>transform)
    ; now do something with this coordinate. It's transformed to the top level coordinate space.
  )
)

It rather depends on what you're trying to do and how ambitious you are. The above finds all the pin figures, finds the centre of the figure, and then transforms the coordinate up to the coordinate system of the containing layout. Note I didn't test the code, but it should be OK I think.

Regards,

Andrew

Hi Andrew,

  dbFindTermByName(instID~>master "S"). This was giving error

I tried out like this after seeing in virtuoso document which was having syntax like dbFindTermByName (d_cellView t_name)

//////////////////////////////////////////////////

cv=geGetEditCellView()

dbFindTermByName(cv "s")   ******term names inside pcell are ("s" "g" "d")

//////////////////////////////////////////////

This is giving result as "NIL".

I tried out similar function  dbFindNetByName(cv "vss") which is working well but I couldn't get access to bbox of pins through this.

Can you help me in finding working ways of dbFindTermByName() through which i can access to "PINS" inside pcell & then transform co-ordinates to above hierarchy ?

Thanks,

Raghu

Raghu,

Well, if something gives an error, it's rather helpful to know what the error actually was - otherwise I have no idea what  you're doing wrong - that code should work. If the terminal was incorrectly named, it would return nil rather than an error. If you don't have a variable called instID, then that might give an error but that would be pretty clear then.

The code using geGetEditCellView() will look for a pin called "s" in the current cellView - and I assume the current cellView is the containing layout and so is unlikely to have a terminal called "s" - you're looking for a terminal called "s" or "S" on one of the instances within the design.

So please give a picture with details of what you tried and what the error was. Otherwise I'm having to guess in the dark. 

Regards,

Andrew.

Hi Andrew,

I will reply to your comments

If you don't have a variable called instID, then that might give an error but that would be pretty clear then.

Yeah. I don't have a variable called instID , I was assuming instID as  something like this  instID=geGetSelSet();    Hence it was giving error.

Now Is there a way to workout your code in other way ?

The code using geGetEditCellView() will look for a pin called "s" in the current cellView - and I assume the current cellView is the containing layout and so is unlikely to have a terminal called "s"

You are correct . This will look for terms or pins in current layout window while there is no such pin.  I was supposed to find for a pin inside p-cell which is not working in the way I tried out

Thanks,

Raghu

You either need to select the instance and then do:

instID=car(geGetSelSet())

(the car is needed because geGetSelSet returns a list of selected items, and the code I gave only needs the first). Alternatively use the approach suggested by Matthias (his post seems to have vanished, so I assume he deleted it?) which was to use dbFindAnyInstByName to find the instance id if you know what the name of the instance is:

instID=dbFindAnyInstByName(geGetEditCellView() "M0") ; whatever the instance name is called is the second argument.

Regards,

Andrew.

Hi Andrew,

Thank you . The code was working if P-cell is having only one finger . I am able to get exactly what i wanted.  what if my instance is multiple fingered but still i will get only one co-ordinate. Can you help me in proceeding further with multiple fingered devices? i.e; identifying co-ordinates of same terminal with multiple fingers

Thanks,

Raghu

Hi Raghu,

The code I gave should actually return the coordinates of multiple pins if the pins are strongly connected or weakly connected. What it won't do is return the coordinates for must-connected terminals (because the terminals have different names). Because I don't know what you're dealing with, can you use this code:

procedure(abPinInfo(@optional (cellView geGetEditCellView()))
  foreach(term cellView~>terminals
    printf("TERM %L NAME %L MUSTJOIN %L PHYSONLY %L\n" term term~>name term~>mustJoinTerms term~>physOnly)
    foreach(pin term~>pins
      printf(" PIN %L NAME %L\n" pin pin~>name)
      foreach(fig pin~>figs
        printf(" LAYER %L CENTER %L\n" fig~>lpp centerBox(fig~>bBox))
      )
    )
  )
  t
)

Then call abPinInfo(instID~>master) and post the results here (for your multi-finger instance)?

Thanks,

Andrew.

Hi Andrew,

Thank you so much for u r help !! I am trying to locate these co-ordinates and drop via's on these & connect common terminals i.e; common nets between devices. I will explain you about the progress

Thanks,

Raghu

Hi Andrew,

I added transforming co-ordinates function to the above code & I am able to get the result,  similarly I want to append corresponding net names of each terminal  to the  below code, Is there a way to do this ?

note : I want net names of that instance as in schematic. I generated instance to layout from schematic. For now  I am able to read the net names something like this

inst~>conns~>net~>name  =>  ("vss" "vdd" "g")

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

procedure(abPinNetInfo(@optional (cellView geGetEditCellView()))
foreach(term cellView~>terminals
printf("TERM %L NAME %L MUSTJOIN %L PHYSONLY %L\n" term term~>name term~>mustJoinTerms term~>physOnly)
foreach(pin term~>pins
printf(" PIN %L NAME %L\n" pin pin~>name)
foreach(fig pin~>figs
printf(" LAYER %L CENTER %L\n CentreTopCoordinate %L\n netname %L\n  " fig~>lpp centerBox(fig~>bBox) dbTransformPoint(centerBox(fig~>bBox) instID~>transform) instID~>conns~>net~>name)
)
)
)
t
)

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Thanks,

Raghu

Raghu,

The purpose of that code was just to help me understand what the structure of the pins on your device was. Trying to add instance-specific information into the code is going to just be confusing (and hard - because you're traversing the master at that point in the code - trying to tie that up to the instance is not going to be straightforward - and not particularly useful).

Trying to guess what you're doing from partial information is not particularly productive. It would be far better for you to contact customer support so that somebody could have (say) a webex with you to understand what you're doing and what you're trying to do.

Regards,

Andrew.