Does OpenRAM support pbitcell flow?

[highsharp-wyj]

hi all,

i wanna to try pbitcell generate memory flow in tech scn4m_subm, but it shows errors. does OpenRAM support pbitcell flow(not custom cells)?

Thank you all.

[mguthaus]

Yes, it should. What error are you seeing?

[highsharp-wyj]

Thank you! maybe I use the wrong way to enable pbitcells (I rename the custom cell files to disable use custom cells), could you please help advise how to enable pbitcell flow?

and the ERROR shows,

File "/home/cad-user/openram/compiler/modules/sram.py", line 149, in save
lib(out_dir=OPTS.output_path, sram=self.s, sp_file=sp_file)
File "/home/cad-user/openram/compiler/characterizer/lib.py", line 46, in init
self.characterize_corners()
File "/home/cad-user/openram/compiler/characterizer/lib.py", line 163, in characterize_corners
self.characterize()
File "/home/cad-user/openram/compiler/characterizer/lib.py", line 175, in characterize
self.compute_delay()
File "/home/cad-user/openram/compiler/characterizer/lib.py", line 654, in compute_delay
char_results = self.d.analyze(probe_address, probe_data, self.load_slews)
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 1145, in analyze
self.analysis_init(probe_address, probe_data)
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 1136, in analysis_init
self.create_measurement_objects()
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 58, in create_measurement_objects
self.read_meas_lists = self.create_read_port_measurement_objects()
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 116, in create_read_port_measurement_objects
read_measures.append(self.create_sen_and_bitline_path_measures())
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 258, in create_sen_and_bitline_path_measures
self.sen_path_meas = self.create_delay_path_measures(sen_path)
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 285, in create_delay_path_measures
path_dirs = self.get_meas_directions(path)
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 310, in get_meas_directions
mod_type_bools = [mod.is_non_inverting() for mod in edge_mods]
File "/home/cad-user/openram/compiler/characterizer/delay.py", line 310, in
mod_type_bools = [mod.is_non_inverting() for mod in edge_mods]
AttributeError: 'pbitcell' object has no attribute 'is_non_inverting'

[mguthaus]

This was a bug. I fixed it in 8fd0891 which is currently in the dev branch.