examples/dataflow/dma: refactor

examples/dataflow/dma.py

@@ -5,20 +5,24 @@
 from migen.flow.network import *
 from migen.actorlib import dma_wishbone
 from migen.actorlib.sim import *
-from migen.bus import wishbone
+from migen.bus import wishbone, asmibus
 from migen.sim.generic import Simulator
 from migen.sim.icarus import Runner
 
-class MyModel(wishbone.TargetModel):
-	def __init__(self):
-		self.prng = Random(763627)
-
+class MyModel:
 	def read(self, address):
 		return address + 4
-
+
+class MyModelWB(MyModel, wishbone.TargetModel):
+	def __init__(self):
+		self.prng = Random(763627)
+
 	def can_ack(self, bus):
 		return self.prng.randrange(0, 2)
 
+class MyModelASMI(MyModel, asmibus.TargetModel):
+	pass
+
 def adrgen_gen():
 	for i in range(10):
 		print("Address:  " + str(i))
@@ -30,8 +34,29 @@ def dumper_gen():
 		yield t
 		print("Received: " + str(t.value["d"]))
 
-def test_reader():
-	print("*** Testing reader")
+def trgen_gen():
+	for i in range(10):
+		a = i
+		d = i+10
+		print("Address: " + str(a) + " Data: " + str(d))
+		yield Token("address_data", {"a": a, "d": d})
+
+def wishbone_sim(efragment, master, end_simulation):
+	peripheral = wishbone.Target(MyModelWB())
+	tap = wishbone.Tap(peripheral.bus)
+	interconnect = wishbone.InterconnectPointToPoint(master.bus, peripheral.bus)
+
+	fragment = efragment \
+		+ peripheral.get_fragment() \
+		+ tap.get_fragment() \
+		+ interconnect.get_fragment() \
+		+ Fragment(sim=[end_simulation])
+
+	sim = Simulator(fragment, Runner())
+	sim.run()
+
+def test_wb_reader():
+	print("*** Testing Wishbone reader")
 	adrgen = SimActor(adrgen_gen(), ("address", Source, [("a", BV(30))]))
 	reader = dma_wishbone.Reader()
 	dumper = SimActor(dumper_gen(), ("data", Sink, [("d", BV(32))]))
@@ -40,50 +65,21 @@ def test_reader():
 	g.add_connection(reader, dumper)
 	comp = CompositeActor(g)
 
-	peripheral = wishbone.Target(MyModel())
-	interconnect = wishbone.InterconnectPointToPoint(reader.bus, peripheral.bus)
-
 	def end_simulation(s):
 		s.interrupt = adrgen.done and not s.rd(comp.busy)
-
-	fragment = comp.get_fragment() \
-		+ peripheral.get_fragment() \
-		+ interconnect.get_fragment() \
-		+ Fragment(sim=[end_simulation])
-
-	sim = Simulator(fragment, Runner())
-	sim.run()
+	wishbone_sim(comp.get_fragment(), reader, end_simulation)
 
-def trgen_gen():
-	for i in range(10):
-		a = i
-		d = i+10
-		print("Address: " + str(a) + " Data: " + str(d))
-		yield Token("address_data", {"a": a, "d": d})
-
-def test_writer():
-	print("*** Testing writer")
+def test_wb_writer():
+	print("*** Testing Wishbone writer")
 	trgen = SimActor(trgen_gen(), ("address_data", Source, [("a", BV(30)), ("d", BV(32))]))
 	writer = dma_wishbone.Writer()
 	g = DataFlowGraph()
 	g.add_connection(trgen, writer)
 	comp = CompositeActor(g)
 
-	peripheral = wishbone.Target(MyModel())
-	tap = wishbone.Tap(peripheral.bus)
-	interconnect = wishbone.InterconnectPointToPoint(writer.bus, peripheral.bus)
-
 	def end_simulation(s):
 		s.interrupt = trgen.done and not s.rd(comp.busy)
-
-	fragment = comp.get_fragment() \
-		+ peripheral.get_fragment() \
-		+ tap.get_fragment() \
-		+ interconnect.get_fragment() \
-		+ Fragment(sim=[end_simulation])
-
-	sim = Simulator(fragment, Runner())
-	sim.run()
+	wishbone_sim(comp.get_fragment(), writer, end_simulation)
 
-test_reader()
-test_writer()
+test_wb_reader()
+test_wb_writer()