From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Fri, 24 Jul 2015 11:02:54 +0000 (+0200)
Subject: migen/actorlib/fifo: add FIFO wrapper function
X-Git-Tag: 24jan2021_ls180~2099^2~35
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d0a19c4be85c2f3d21e891b8a5520ba5a7a3a258;p=litex.git

migen/actorlib/fifo: add FIFO wrapper function

Allow automatic instantiation of the correct fifo (SyncFIFO or AsyncFIFO) according to the clock domains passed in argument.
---

diff --git a/migen/actorlib/fifo.py b/migen/actorlib/fifo.py
index 072e99c7..4363870f 100644
--- a/migen/actorlib/fifo.py
+++ b/migen/actorlib/fifo.py
@@ -55,3 +55,15 @@ class SyncFIFO(_FIFOActor):
 class AsyncFIFO(_FIFOActor):
     def __init__(self, layout, depth):
         _FIFOActor.__init__(self, fifo.AsyncFIFO, layout, depth)
+
+
+def FIFO(layout, depth, buffered=False,
+          sink_cd="sys", source_cd="sys"):
+    if sink_cd != source_cd:
+        if buffered:
+            ValueError("AsyncFIFO does not support buffered mode")
+        fifo = AsyncFIFO(layout, depth)
+        return ClockDomainsRenamer({"write": sink_cd, "read": source_cd})(fifo)
+    else:
+        fifo = SyncFIFO(layout, depth, buffered)
+        return ClockDomainsRenamer(sink_cd)(fifo)