characterizer and functional simulator working from command line

compiler/characterize_existing.py

@@ -34,6 +34,8 @@ import debug
 # Parse config file and set up all the options
 init_openram(config_file=args[0], is_unit_test=False)
 
+print_banner()
+
 # Configure the SRAM organization (duplicated from openram.py)
 from sram_config import sram_config
 c = sram_config(word_size=OPTS.word_size,

compiler/characterizer/functional.py

@@ -36,9 +36,6 @@ class functional(simulation):
         if not corner:
             corner = (OPTS.process_corners[0], OPTS.supply_voltages[0], OPTS.temperatures[0])
 
-        if period:
-            self.period = period
-
         if not output_path:
             self.output_path = OPTS.openram_temp
         else:
@@ -73,6 +70,10 @@ class functional(simulation):
         self.set_spice_constants()
         self.set_stimulus_variables()
 
+        # Override default period
+        if period:
+            self.period = period
+
         # For the debug signal names
         self.wordline_row = 0
         self.bitline_column = 0

compiler/func_sim_existing.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+# See LICENSE for licensing information.
+#
+# Copyright (c) 2016-2021 Regents of the University of California and The Board
+# of Regents for the Oklahoma Agricultural and Mechanical College
+# (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+#
+"""
+This script will characterize an SRAM previously generated by OpenRAM given a
+configuration file. Configuration option "use_pex" determines whether extracted
+or generated spice is used and option "analytical_delay" determines whether
+an analytical model or spice simulation is used for characterization.
+"""
+
+import sys
+import datetime
+from globals import *
+from importlib import reload
+
+(OPTS, args) = parse_args()
+
+# Override the usage
+USAGE = "Usage: {} [options] <config file> <cycles> <period>\nUse -h for help.\n".format(__file__)
+
+# Check that we are left with a single configuration file as argument.
+if len(args) != 3:
+    print(USAGE)
+    sys.exit(2)
+
+# Parse argument
+config_file = args[0]
+cycles = int(args[1])
+period = float(args[2])
+
+# These depend on arguments, so don't load them until now.
+import debug
+
+# Parse config file and set up all the options
+init_openram(config_file=config_file, is_unit_test=False)
+
+print_banner()
+
+# Configure the SRAM organization (duplicated from openram.py)
+from sram_config import sram_config
+c = sram_config(word_size=OPTS.word_size,
+                num_words=OPTS.num_words,
+                write_size=OPTS.write_size,
+                num_banks=OPTS.num_banks,
+                words_per_row=OPTS.words_per_row,
+                num_spare_rows=OPTS.num_spare_rows,
+                num_spare_cols=OPTS.num_spare_cols)
+
+# Initialize and create the sram object
+from sram import sram
+s = sram(name=OPTS.output_name, sram_config=c)
+s.create()
+
+# Generate stimulus and run functional simulation on the design
+start_time = datetime.datetime.now()
+from characterizer import functional
+debug.print_raw("Functional simulation... ")
+f = functional(s.s, cycles=cycles, spfile=s.get_sp_name(), period=period, output_path=OPTS.openram_temp)
+(fail, error) = f.run()
+print_time("Functional simulation", datetime.datetime.now(), start_time)
+print(error)
+
+# Delete temp files, remove the dir, etc. after success
+if fail:
+    end_openram()