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framebuffer: work around dysfunctional Xst retiming

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Sebastien Bourdeauducq 2013-06-13 09:41:17 +02:00
parent 1c8ef0fe3e
commit df23431d77
1 changed files with 7 additions and 3 deletions
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10
milkymist/framebuffer/__init__.py
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@ -53,7 +53,8 @@ class Framebuffer(Module):
class Blender(PipelinedActor, AutoCSR): class Blender(PipelinedActor, AutoCSR):
def __init__(self, nimages, latency): def __init__(self, nimages, latency):
self.sink = Sink([("i"+str(i), pixel_layout) for i in range(nimages)]) sink_layout = [("i"+str(i), pixel_layout) for i in range(nimages)]
self.sink = Sink(sink_layout)
self.source = Source(pixel_layout) self.source = Source(pixel_layout)
factors = [] factors = []
for i in range(nimages): for i in range(nimages):
@ -65,7 +66,10 @@ class Blender(PipelinedActor, AutoCSR):
### ###
imgs = [getattr(self.sink.payload, "i"+str(i)) for i in range(nimages)] sink_registered = Record(sink_layout)
self.sync += If(self.pipe_ce, sink_registered.eq(self.sink.payload))
imgs = [getattr(sink_registered, "i"+str(i)) for i in range(nimages)]
outval = Record(pixel_layout) outval = Record(pixel_layout)
for e in pixel_layout: for e in pixel_layout:
name = e[0] name = e[0]
@ -85,7 +89,7 @@ class Blender(PipelinedActor, AutoCSR):
] ]
pipe_stmts = [] pipe_stmts = []
for i in range(latency): for i in range(latency-1):
new_outval = Record(pixel_layout) new_outval = Record(pixel_layout)
pipe_stmts.append(new_outval.eq(outval)) pipe_stmts.append(new_outval.eq(outval))
outval = new_outval outval = new_outval