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#openlane
Title
# openlane
t

tgingold

10/03/2020, 4:49 PM
Why does openlane specify the
<http://tracks.info|tracks.info>
file for
initialize_floorplan
? If I understand correctly,
initialize_floorplan
can extract the layer infos from the lef file if there is no
-tracks
file. So, what is missing in the lef file ?
a

Ahmed Ghazy

10/04/2020, 2:37 PM
initialize_floorplan
creates tracks only in the preferred direction when using a tech LEF, while some of the other tools actually expect tracks on both directions (vertical and horizontal). It's pretty easy to modify this behaviour of
initialize_floorplan
though. However, the advantage I can think of regarding
<http://tracks.info|tracks.info>
is the ability to easily adjust tracks in cases where the track pitches in the tech LEF are not suitable or accurate.
t

tgingold

10/04/2020, 4:22 PM
Ok, thanks.