examples/dataflow/dma: refactor

examples/dataflow/dma.py

@@ -5,20 +5,24 @@ from migen.flow.ala import *
 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))
@@ -30,53 +34,19 @@ def dumper_gen():
 		yield t
 		print("Received: " + str(t.value["d"]))
 
-def test_reader():
-	print("*** Testing reader")
-	adrgen = SimActor(adrgen_gen(), ("address", Source, [("a", BV(30))]))
-	reader = dma_wishbone.Reader()
-	dumper = SimActor(dumper_gen(), ("data", Sink, [("d", BV(32))]))
-	g = DataFlowGraph()
-	g.add_connection(adrgen, 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()
-
 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")
-	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())
+
+def wishbone_sim(efragment, master, end_simulation):
+	peripheral = wishbone.Target(MyModelWB())
 	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() \
+	interconnect = wishbone.InterconnectPointToPoint(master.bus, peripheral.bus)
+
+	fragment = efragment \
 		+ peripheral.get_fragment() \
 		+ tap.get_fragment() \
 		+ interconnect.get_fragment() \
@@ -85,5 +55,31 @@ def test_writer():
 	sim = Simulator(fragment, Runner())
 	sim.run()
 
-test_reader()
-test_writer()
+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))]))
+	g = DataFlowGraph()
+	g.add_connection(adrgen, reader)
+	g.add_connection(reader, dumper)
+	comp = CompositeActor(g)
+	
+	def end_simulation(s):
+		s.interrupt = adrgen.done and not s.rd(comp.busy)
+	wishbone_sim(comp.get_fragment(), reader, end_simulation)
+
+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)
+	
+	def end_simulation(s):
+		s.interrupt = trgen.done and not s.rd(comp.busy)
+	wishbone_sim(comp.get_fragment(), writer, end_simulation)
+
+test_wb_reader()
+test_wb_writer()