examples/basic_sim.py

   1 from migen.fhdl.structure import *
   2 from migen.sim.generic import Simulator, TopLevel
   3 from migen.sim.icarus import Runner
   4
   5 class Counter:
   6         def __init__(self):
   7                 self.ce = Signal()
   8                 self.count = Signal(BV(4))
   9
  10         def do_simulation(self, s, cycle):
  11                 if cycle % 2:
  12                         s.wr(self.ce, 0)
  13                 else:
  14                         s.wr(self.ce, 1)
  15                 print("Cycle: " + str(cycle) + " Count: " + str(s.rd(self.count)))
  16
  17         def get_fragment(self):
  18                 sync = [If(self.ce, self.count.eq(self.count + 1))]
  19                 sim = [self.do_simulation]
  20                 return Fragment(sync=sync, sim=sim)
  21
  22 def main():
  23         dut = Counter()
  24         sim = Simulator(dut.get_fragment(), Runner(), TopLevel("my.vcd"))
  25         sim.run(10)
  26
  27 main()