pytholite: introduce io module

migen/pytholite/compiler.py

@@ -7,6 +7,7 @@ from migen.fhdl.structure import _Slice
 from migen.fhdl import visit as fhdl
 from migen.corelogic.fsm import FSM
 from migen.pytholite import transel
+from migen.pytholite.io import *
 
 class FinalizeError(Exception):
 	pass
@@ -319,7 +320,9 @@ def _create_fsm(states):
 		fsm.act(getattr(fsm, stnames[i]), *actions)
 	return fsm
 
-def make_pytholite(func):
+def make_pytholite(func, **ioresources):
+	pl = make_io_object(**ioresources)
+	
 	tree = ast.parse(inspect.getsource(func))
 	symdict = func.__globals__.copy()
 	registers = []
@@ -334,4 +337,5 @@ def make_pytholite(func):
 	fsm = _create_fsm(states)
 	fsmf = _LowerAbstractLoad().visit(fsm.get_fragment())
 	
-	return regf + fsmf
+	pl.fragment = regf + fsmf
+	return pl

migen/pytholite/io.py

@@ -0,0 +1,15 @@
+from migen.flow.actor import *
+
+class Pytholite:
+	def get_fragment(self):
+		return self.fragment
+
+class DFPytholite(Pytholite, Actor):
+	pass
+
+def make_io_object(dataflow=None):
+	if dataflow is None:
+		return Pytholite()
+	else:
+		return DFPytholite(dataflow)
+