51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
from random import Random
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from migen.fhdl.structure import *
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from migen.sim.generic import Simulator, TopLevel
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from migen.sim.icarus import Runner
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from milkymist.asmicon.refresher import *
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from common import CommandLogger
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class Granter:
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def __init__(self, req, ack):
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self.req = req
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self.ack = ack
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self.state = 0
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self.prng = Random(92837)
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def do_simulation(self, s):
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elts = ["@" + str(s.cycle_counter)]
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if self.state == 0:
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if s.rd(self.req):
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elts.append("Refresher requested access")
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self.state = 1
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elif self.state == 1:
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if self.prng.randrange(0, 5) == 0:
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elts.append("Granted access to refresher")
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s.wr(self.ack, 1)
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self.state = 2
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elif self.state == 2:
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if not s.rd(self.req):
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elts.append("Refresher released access")
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s.wr(self.ack, 0)
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self.state = 0
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if len(elts) > 1:
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print("\t".join(elts))
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def get_fragment(self):
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return Fragment(sim=[self.do_simulation])
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def main():
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dut = Refresher(13, 2, tRP=3, tREFI=100, tRFC=5)
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logger = CommandLogger(dut.cmd)
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granter = Granter(dut.req, dut.ack)
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fragment = dut.get_fragment() + logger.get_fragment() + granter.get_fragment()
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sim = Simulator(fragment, Runner())
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sim.run(400)
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main()
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