I tried `DIODE_INSERTION_STRATEGY` set to `0`. I w...
# openlane
t
I tried
DIODE_INSERTION_STRATEGY
set to
0
. I was possibly expecting some Antenna errors, but instead what I got is a bunch of
All nwells must contain metal-connected N+ taps (nwell.4)
DRC errors. Looks like disabling diodes also disabled tap cells ?!?
No they're there 😕 bunch of
PHY_xxx
cells.
Mmm, I think that's just an artefact of using
MAGIC_DRC_USE_GDS 0
. It only looks at LEF and so it has no idea there is a connection.
a
@tnt: That is correct.
t
Thanks for confirming.
The only valid DRC errors I seem to have are all things like :

https://i.imgur.com/afxrQE6.png

those all happen with
metal1
of the cell interacting with
metal1
from the router. And all in
sky130_fd_sc_hd__dfrtp_4
cells.
a
@tnt: And they are not reported by Triton Route as well?
t
They are not.
And this is not a short. This is all the same net.

https://i.imgur.com/Ogjqd0a.png

a
What error type is magic reporting?
t
This view is the GDS from the library for that cell.
Min area of metal1 hole > 0.14um^ (met1.7)
a
Did you measure it with a klayout ruler or something? Because I've seen magic hallucinate about those errors in the past.
t
It's definitely smaller than the minimum. It's like 0.0003 um^2
a
@tnt: We should probably file an issue about that here https://github.com/The-OpenROAD-Project/TritonRoute @Ahmed Ghazy: Do you think this is a waivable/false violation?
t
Ok, I'll file a ticket.