having issue while trying to create sram for sky130 pdk

Question

having issue while trying to create sram for sky130 pdk

bharath19-gs opened this issue a year ago · comments

Hi,

I am facing issue with sky130, not getting the required output as per requirement
please find the log below and the config that i have used.

|==============================================================================|
|========= OpenRAM v1.2.19 =========|
|========= =========|
|========= VLSI Design and Automation Lab =========|
|========= Computer Science and Engineering Department =========|
|========= University of California Santa Cruz =========|
|========= =========|
|========= Usage help: openram-user-group@ucsc.edu =========|
|========= Development help: openram-dev-group@ucsc.edu =========|
|========= See LICENSE for license info =========|
|==============================================================================|
** Start: 07/15/2023 15:51:44
Technology: sky130
Total size: 4096 bits
Word size: 16
Words: 256
Banks: 1
RW ports: 1
R-only ports: 0
W-only ports: 0
DRC/LVS/PEX is only run on the top-level design to save run-time (inline_lvsdrc=True to do inline checking).
DRC/LVS/PEX is disabled (check_lvsdrc=True to enable).
Characterization is disabled (using analytical delay models) (analytical_delay=False to simulate).
Words per row: None
Output files are:
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lvs
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.sp
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.v
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lib
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.py
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.html
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.log
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lef
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.gds
ERROR: file hierarchy_layout.py: line 579: Should use a pin iterator since more than one pin vpb

ERROR: file hierarchy_layout.py: line 586: No pin found with name vpb on sky130_fd_bd_sram__sram_sp_colenda. Saved as missing_pin.gds.

my config

Data word size

word_size = 16

Number of words in the memory

num_words = 256

num_spare_cols=1
num_spare_rows=1

num_rw_ports = 1

Technology to use in $OPENRAM_TECH

tech_name = "sky130"

Process corners to characterize

process_corners = [ "TT" ]

Voltage corners to characterize

supply_voltages = [ 3.3 ]

Temperature corners to characterize

temperatures = [ 25 ]

Output directory for the results

output_path = "temp"

Output file base name

output_name = "fakeram130_256x16"

Disable analytical models for full characterization (WARNING: slow!)

analytical_delay = False

To force this to use magic and netgen for DRC/LVS/PEX

Could be calibre for FreePDK45

drc_name = "magic"
lvs_name = "netgen"
pex_name = "magic"

and
using the command :
python3 $OPENRAM_HOME/../sram_compiler.py myconfig.py

the requirement: want to create a sram of 256x16

please do let me know how to fix this.

regards
gsb

G S bharath · Answer 1 · Sat Jul 15 2023 22:48:30 GMT+0800 (China Standard Time)

** Start: 07/15/2023 20:15:27
Technology: sky130
Total size: 4096 bits
Word size: 16
Words: 256
Banks: 1
RW ports: 1
R-only ports: 0
W-only ports: 0
DRC/LVS/PEX is only run on the top-level design to save run-time (inline_lvsdrc=True to do inline checking).
DRC/LVS/PEX is disabled (check_lvsdrc=True to enable).
Characterization is disabled (using analytical delay models) (analytical_delay=False to simulate).
Words per row: None
Output files are:
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lvs
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.sp
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.v
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lib
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.py
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.html
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.log
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.lef
/home/gsb/Documents/OpenRAM/compiler/temp/fakeram130_256x16.gds
ERROR: file hierarchy_layout.py: line 579: Should use a pin iterator since more than one pin vpb
ERROR: file hierarchy_layout.py: line 586: No pin found with name vpb on sky130_fd_bd_sram__sram_sp_colenda. Saved as missing_pin.gds.
Traceback (most recent call last):
File "/home/gsb/Documents/OpenRAM/compiler/base/hierarchy_layout.py", line 579, in get_pin
debug.error("Should use a pin iterator since more than one pin {}".format(text), -1)
File "/home/gsb/Documents/OpenRAM/compiler/debug.py", line 47, in error
assert return_value == 0
^^^^^^^^^^^^^^^^^
AssertionError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/gsb/Documents/OpenRAM/compiler/../sram_compiler.py", line 71, in
s = sram()
^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/sram.py", line 56, in init
self.s.create_netlist()
File "/home/gsb/Documents/OpenRAM/compiler/modules/sram_1bank.py", line 196, in create_netlist
self.add_modules()
File "/home/gsb/Documents/OpenRAM/compiler/modules/sram_1bank.py", line 462, in add_modules
self.bank = factory.create("bank", sram_config=self.sram_config, module_name="bank")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/sram_factory.py", line 153, in create
obj = mod(name=module_name, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/modules/bank.py", line 49, in init
self.create_netlist()
File "/home/gsb/Documents/OpenRAM/compiler/modules/bank.py", line 59, in create_netlist
self.add_modules()
File "/home/gsb/Documents/OpenRAM/compiler/modules/bank.py", line 377, in add_modules
self.bitcell_array = factory.create(module_type="capped_replica_bitcell_array",
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/sram_factory.py", line 153, in create
obj = mod(name=module_name, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_capped_replica_bitcell_array.py", line 37, in init
self.create_netlist()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_capped_replica_bitcell_array.py", line 43, in create_netlist
self.add_modules()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_capped_replica_bitcell_array.py", line 48, in add_modules
self.replica_bitcell_array = factory.create(module_type="replica_bitcell_array",
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/sram_factory.py", line 153, in create
obj = mod(name=module_name, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_replica_bitcell_array.py", line 61, in init
super().init(self.row_size, self.column_size, rbl, left_rbl, right_rbl, name)
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/replica_bitcell_array.py", line 72, in init
self.create_netlist()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/replica_bitcell_array.py", line 82, in create_netlist
self.add_modules()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/replica_bitcell_array.py", line 136, in add_modules
self.replica_columns[port] = factory.create(module_type="replica_column",
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/sram_factory.py", line 153, in create
obj = mod(name=module_name, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_replica_column.py", line 63, in init
self.create_layout()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_replica_column.py", line 76, in create_layout
self.add_layout_pins()
File "/home/gsb/Documents/OpenRAM/technology/sky130/custom/sky130_replica_column.py", line 240, in add_layout_pins
pin = inst.get_pin("vpb")
^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/base/geometry.py", line 253, in get_pin
pin = copy.deepcopy(self.mod.get_pin(name))
^^^^^^^^^^^^^^^^^^^^^^
File "/home/gsb/Documents/OpenRAM/compiler/base/hierarchy_layout.py", line 586, in get_pin
debug.error("No pin found with name {0} on {1}. Saved as missing_pin.gds.".format(name, self.cell_name), -1)
File "/home/gsb/Documents/OpenRAM/compiler/debug.py", line 47, in error
assert return_value == 0
^^^^^^^^^^^^^^^^^
AssertionError

extra details

hope it helps to find where i am going wrong or whats causing the issues

NamrathaCTR · Answer 2 · Thu Aug 24 2023 16:33:07 GMT+0800 (China Standard Time)

Hi, I am facing the same issue? @bharath19-gs , were you able to find a way to run this?

Jesse Cirimelli-Low · Answer 3 · Thu Aug 24 2023 17:13:27 GMT+0800 (China Standard Time)

Sorry I'm in the middle of a big refactor of this code right now. I'll have this bug fixed by the end of the week, probably within 24 hours.

Jesse Cirimelli-Low · Answer 4 · Sun Aug 27 2023 06:18:19 GMT+0800 (China Standard Time)

Should be fixed now

NamrathaCTR · Answer 5 · Thu Aug 31 2023 01:16:38 GMT+0800 (China Standard Time)

Hi, for below configuration file(no of ports=1), I am getting the above mentioned same issue, but if I change no of ports to 2, I am not getting issue. I guess this issue for generating single port memories. Can you please go through my configuration file and tell me if I am making any mistake?