wishbone: base TargetModel class
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@ -9,16 +9,13 @@ from migen.bus import wishbone
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from migen.sim.generic import Simulator
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from migen.sim.icarus import Runner
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class MyModel:
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class MyModel(wishbone.TargetModel):
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def __init__(self):
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self.prng = Random(763627)
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def read(self, address):
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return address + 4
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def write(self, address, data, sel):
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pass
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def can_ack(self, bus):
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return self.prng.randrange(0, 2)
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@ -33,16 +33,13 @@ def my_generator():
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yield None
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# Our bus slave.
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class MyModel:
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class MyModel(wishbone.TargetModel):
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def __init__(self):
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self.prng = Random(763627)
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def read(self, address):
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return address + 4
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def write(self, address, data, sel):
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pass
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def can_ack(self, bus):
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return self.prng.randrange(0, 2)
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@ -188,6 +188,16 @@ class Initiator:
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def get_fragment(self):
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return Fragment(sim=[self.do_simulation])
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class TargetModel:
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def read(self, address):
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return 0
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def write(self, address, data, sel):
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pass
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def can_ack(self, bus):
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return True
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class Target:
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def __init__(self, model):
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self.bus = Interface()
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@ -196,11 +206,7 @@ class Target:
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def do_simulation(self, s):
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bus = Proxy(s, self.bus)
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if not bus.ack:
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if hasattr(self.model, "can_ack"):
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can_ack = self.model.can_ack(bus)
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else:
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can_ack = True
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if can_ack and bus.cyc and bus.stb:
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if self.model.can_ack(bus) and bus.cyc and bus.stb:
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if bus.we:
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self.model.write(bus.adr, bus.dat_w, bus.sel)
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else:
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