Hi, has anyone been able to add the sram macro from

dependencies/pdks/sky130B/libs.ref/sky130_sram_macros

to their design in Caravel on mpw-7a? I get

Check whether EXTRA_LEFS is set appropriately

with Caravel, and I get an LVS error when I build OpenLANE by itself. If anyone was able to add the sram macro to their design, please show me the repository or config.tcl.

Do you have

EXTRA_LEFS

set in

config.tcl

?

Of course. Furthermore, I'm also getting the error

module $not found in merged.nom.lef

. I have copied the .gds, .v and .lef to caravel.

Spaces at the end of the line inside the quotes?

$script_dir

has had some issues when used with older versions. Can you do a

puts $::env(EXTRA_LEFS)

afterwards to make sure it's where you expect it to be? You might also check the

config.tcl

file in the

runs/<tag>/

directory. That should contain the expanded version.

Thanks for the reply. I tried using

$::env(PDK_ROOT)/$::env(PDK)/libs.ref/sky130_sram_macos/

but the result did not change.

Do you have a gl verilog netlist for

user_project_wrapper

? The one in the repo doesn't appear to match the rtl verilog (one sram instance). I'm thinking that the

$not

module might refer to the inverter needed to create the inverted signal for

.csb0   (~wbs_stb_i     ), // active low chip select
        .web0   (~wbs_we_i      ), // active low write control

I think you have SYNTH_TOP_LEVEL set to 1 which won't do synthesis, correct? Maybe instead of inverted signals, you could test with non-inverted signals.

The error is gone!!! It was due to the inverter at the top level, as you indicated! Thanks so much for responding, @Mitch Bailey and @Matt Venn!