Hi all, What is correct way of listing multiple clocks in config.tcl? I saw in few repos and also tried by myself doing it like this:

set ::env(CLOCK_PORT) "wb0_clk_i wb1_clk_i ram_clk0 ram_clk1"

But this results in this error during hardening:

You should put the positional args at the end - see https://github.com/The-OpenROAD-Project/OpenSTA/blob/master/doc/OpenSTA.pdf

@User Looking at the OpenSTA, it appears that the

create_clock

command creates a virtual clock driver for the pin or pins at the end of the command. To create multiple clocks (say at different frequencies), I'm assuming it's necessary to use multiple

create_clock

commands defining different clock periods. Do you know if this is possible with the current openlane

config.tcl

configurations?

you do need multiple commands but I'm not an OL expert. @User any comment?

@User So I should have multiple lines in config.tcl with

set ::env(CLOCK_PORT) [,

with each line having only one clock signal mentioned, is that what you mentioned? Won't last clock mentioned in config.tcl overwrite previous signals?