48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
from random import Random
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from migen import *
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from migen.sim.generic import run_simulation
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from misoc.mem.sdram.core.lasmicon.refresher import *
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from common import CommandLogger
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class Granter(Module):
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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, selfp):
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elts = ["@" + str(selfp.simulator.cycle_counter)]
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if self.state == 0:
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if selfp.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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selfp.ack = 1
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self.state = 2
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elif self.state == 2:
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if not selfp.req:
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elts.append("Refresher released access")
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selfp.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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class TB(Module):
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def __init__(self):
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self.submodules.dut = Refresher(13, 2, tRP=3, tREFI=100, tRFC=5)
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self.submodules.logger = CommandLogger(self.dut.cmd)
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self.submodules.granter = Granter(self.dut.req, self.dut.ack)
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if __name__ == "__main__":
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run_simulation(TB(), ncycles=400)
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