lib.fifo.AsyncFIFOBuffered: use FFSynchronizer instead of AsyncFFsynchronizer

rroohhh · whitequark · commit 76efe862fa30 · 2021-01-06T01:05:46.000Z
AsyncFFsynchronizer only synchronizes one edge
diff --git a/nmigen/lib/fifo.py b/nmigen/lib/fifo.py
@@ -513,7 +513,7 @@ def elaborate(self, platform):
         m.d[self._r_domain] += self.r_level.eq(fifo.r_level + r_consume_buffered)
 
         w_consume_buffered = Signal()
-        m.submodules.consume_buffered_cdc = AsyncFFSynchronizer(r_consume_buffered, w_consume_buffered, o_domain=self._w_domain)
+        m.submodules.consume_buffered_cdc = FFSynchronizer(r_consume_buffered, w_consume_buffered, o_domain=self._w_domain)
         m.d.comb += self.w_level.eq(fifo.w_level + w_consume_buffered)
 
         with m.If(self.r_en | ~self.r_rdy):
