tree: 9ae2ec32cbc59b6d1f8704f58ce87c164211d5e2

README.md

TinyTapeout

See https://tinytapeout.com for more information on the project and how to get involved.

tiny tapeout

Instructions to build

./configure --update-projects

./configure --update-caravel

make user_project_wrapper

See progress notes below.

Start klayout in edit mode:

klayout -e -l powerring.lyp gds/user_project_wrapper.gds missing_power_rings.gds

copy met4, via4, met5 from missing_power_rings.gsd into gds/user_project_wrapper.gds. Save it.

Edit verilog/gl/user_project_wrapper.v and add the missing power ports:

vdda1,
vdda2,
vssa1,
vssa2,
vssd1,
vssd2,

...

input vdda1;
input vdda2;
input vssa1;
input vssa2;
input vssd1;
input vssd2;

PDN hang issues https://github.com/The-OpenROAD-Project/OpenLane/issues/1173
Also discovered PDN hangs if extra lefs/defs are not deduplicated
with PDN set so dense, tapeout job fails with density checks
with unused PDN straps turned off, precheck fails
copied the erased version (just power rings) and deleted the first digital power rings, copy pasted that over final gds
precheck fails with missing power ports
manually added missing power ports to gl verilog of user_project_wrapper
precheck passes. Will try tapeout job