From 71b14ac8731527de3aced1029fb38d9e3945cc04 Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Wed, 4 Sep 2013 00:01:33 +0200
Subject: [PATCH] actorlib: add fifo
---
migen/actorlib/fifo.py | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 migen/actorlib/fifo.py
diff --git a/migen/actorlib/fifo.py b/migen/actorlib/fifo.py
new file mode 100644
index 000000000..3d6f036da
--- /dev/null
+++ b/migen/actorlib/fifo.py
@@ -0,0 +1,41 @@
+from migen.fhdl.std import *
+from migen.flow.actor import *
+from migen.genlib import fifo
+
+def FIFOWrapper(sink, source, fifo):
+ return [
+ sink.ack.eq(fifo.writable),
+ fifo.we.eq(sink.stb & sink.ack),
+ fifo.din.eq(sink.payload),
+
+ source.stb.eq(fifo.readable),
+ source.payload.eq(fifo.dout),
+ fifo.re.eq(source.ack)
+ ]
+
+class SyncFIFO(Module):
+ def __init__(self, layout, depth):
+
+ self.sink = Sink(layout)
+ self.source = Source(layout)
+ self.busy = Signal()
+
+ _fifo = fifo.SyncFIFO(layout, depth)
+
+ self.submodules += _fifo
+
+ self.comb += FIFOWrapper(self.sink, self.source, _fifo)
+
+class AsyncFIFO(Module):
+ def __init__(self, layout, depth, cd_write="write", cd_read="read"):
+
+ self.sink = Sink(layout)
+ self.source = Source(layout)
+ self.busy = Signal()
+
+ _fifo = RenameClockDomains(fifo.AsyncFIFO(layout, depth),
+ {"write": cd_write, "read": cd_read})
+ self.submodules += _fifo
+
+ self.comb += FIFOWrapper(self.sink, self.source, _fifo)
+
\ No newline at end of file