#!/usr/bin/env python2.7
"""
Run a regresion test on various srams
"""

import unittest
from testutils import header
import sys,os
sys.path.append(os.path.join(sys.path[0],".."))
import globals
from globals import OPTS
import debug

class sram_func_test(unittest.TestCase):

    def runTest(self):
        globals.init_openram("config_20_{0}".format(OPTS.tech_name))
        OPTS.check_lvsdrc = False
        OPTS.analytical_delay = False
        import characterizer
        reload(characterizer)
        from characterizer import delay

        import sram

        debug.info(1, "Testing timing for sample 1bit, 16words SRAM with 1 bank")
        s = sram.sram(word_size=OPTS.word_size,
                      num_words=OPTS.num_words,
                      num_banks=OPTS.num_banks,
                      name="sram_func_test")

        OPTS.check_lvsdrc = True

        tempspice = OPTS.openram_temp + "temp.sp"
        s.sp_write(tempspice)

        probe_address = "1" * s.addr_size
        probe_data = s.word_size - 1
        debug.info(1, "Probe address {0} probe data {1}".format(probe_address, probe_data))

        d = delay.delay(s,tempspice)
        d.set_probe(probe_address,probe_data)

        # This will exit if it doesn't find a feasible period
        import tech
        load = tech.spice["FF_in_cap"]*4
        slew = tech.spice["rise_time"]*2
        feasible_period = d.find_feasible_period(load,slew)

        os.remove(tempspice)
        OPTS.analytical_delay = True
        reload(characterizer)
        globals.end_openram()
        
# instantiate a copdsay of the class to actually run the test
if __name__ == "__main__":
    (OPTS, args) = globals.parse_args()
    del sys.argv[1:]
    header(__file__, OPTS.tech_name)
    unittest.main()