How to fetch pin-names and pin-directions?

Sandeep,

That is a very convoluted way of getting to the terminal names of the current cellView. It's unnecessarily complicated, will be slow (for a design with a lot of connections) and also the case statement can't work because the cv~>conns~>net~>pins~>term is returning a list of lists - and your code is not dealing with that.

The out_pins, in_pins and in_out pins will not get set by your code as it stands.

If instead you just use foreach(p cv~>terminals and leave the rest of the code the same, it will work. In other words, you can get to the terminals for the cellView simply with cv~>terminals .

Andrew

Thanks Andrew,

• In my top cell, there are many cell-instances, I have to report the pins those instances are connected to.
• After fetching pins, i have to print them accordingly as input pins ,outpins and iopins.

If I use cv~>terminals , I will be getting all the pins in the Top-cell, but I want to fetch the pins that instances are connected to in Top-cell.

 So , I cannot use cv~>terminals here.

Sandeep

Sandeep,

Well, iterating over cv~>conns~>net~>pins~>term won't do that either. You could iterate over the structure (because each net has a list of pins) by doing this with:

foreach(net cv~>conns~>net
  foreach(p net~>pins~>term

and then your case statement inside the inner loop, but you can then end up with the pins listed more than once. It seems a very odd way of going about solving any problem... whatever the problem might be.

It's really not clear what you're trying to do here. Are you trying to find all the top level pins that are connected to an instance (i.e. omitting any floating top-level pins), or are you trying to find, for each instance, whether that instance is connected to a top level pin and if so, which? Or something else?

I could give many examples of iterating over the connectivity, but trying to guess what you really want is difficult and showing every possibility is not feasible.

Andrew

Andrew,

I want to iterate through each instance in the cell.

Thanks,

Sandeep

Andrew,

I want to iterate through each instance in the cell.

Thanks,

Sandeep

Sandeep,

That still doesn't really explain what you're trying to do, but presumably you want to do something like:

foreach(inst cv~>instances
  foreach(instTerm inst~>instTerms
    foreach(signal instTerm~>net~>signals
      when(signal~>term
        printf("Instance %s pin %s connects to external pin %s direction %s\n" inst~>name instTerm~>name signal~>term~>name signal~>term~>direction)
      )
    )
  )
)

Andrew