How to add Pitch info (xDistance, yDistance) mentioned in some lefs in tech json ?

[SupraCoder]

The lef specification supports describing pitch in terms of distance or x/y distances.
Like this: PITCH {distance | xDistance yDistance}.

In tech json, we just have one field to fill this info (distance). How do we add Pitch info if our lef has pitch in terms of
xDistance and yDistance ? Should we simply take the bigger value of the two ? Or is there a way to specify both the values ?

[edwardcwang]

Are you talking about the pitch as specified in the tech LEF, or for a macro?

[SupraCoder]

As specified in the tech Lef.

[edwardcwang]

Hammer should pass along the tech LEF to downstream tools automatically, so probably no action is required. For power strap generation though, you might need to specify a pitch for that IIRC.

[SupraCoder]

Thank you very much for the response. I think I got what I was looking for.

[edwardcwang]

Awesome!

[colinschmidt]

Just to follow up, for the power strap settings it doesn't appear that hammer Metal layer library supports different x and y pitches so if you wanted to use that (a very nice feature IMO) you could just conservatively put the larger of the two pitches.

[SupraCoder]

Thank you for the info. That is what we decided to do. We are using the larger of the two pitches now. It would be nice to see this feature supported in the tool though.

[colinschmidt]

It seems relatively straightforward to add given we already track the orientation of Metals so just a little bit of python if you are interested in becoming a contributor 😄

[SupraCoder]

Will give it a try as soon as I am done with what I am working on right now :)