@Tim Edwards How can I get magic to extract a cell from a mag view with no devices as a black box? I'm trying to run LVS on a caravel design that has no devices in

user_project_wrapper

and want to check the connections. Currently, magic optimizes out empty cells when netlisting.

It should be sufficient to edit the cell view and run the command

property LEFview true

. That forces the cell to be considered abstract, and it won't be extracted except as a black box.

Thanks Tim, I'm running magic in batch mode, so I'll try to figure out how to add that to the script. Thinking about setting an

ABSTRACT_CELLS

environment variable and using this script.

foreach cell $::env(MAGIC_GDS_FLATTEN_CELLS) {
        gds flatglob $cell
}
# list cells to be flattened
puts "Flattening [gds flatglob]"
gds flatten yes
gds read $::env(CURRENT_GDS)

foreach cell $::env(ABSTRACT_CELLS) {
        load $cell -dereference
        property LEFview true
}
load $::env(TOP) -dereference
cd $::env(RUN_DIR)
extract do local
extract no capacitance
extract no coupling
extract unique
extract

ext2spice lvs
ext2spice -o $::env(TOP).gds.spice $::env(TOP).ext
feedback save $::env(TOP)-ext2gds.spice.feedback.txt

Do you see any problems?

Other than my general dislike for environment variables, no, I don't see any problems with it.