50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
from migen.fhdl.structure import *
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from migen.flow.actor import *
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from migen.corelogic.record import *
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from migen.corelogic.misc import optree
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class Buffer(Actor):
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def __init__(self, layout):
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self.d = Record(layout)
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self.q = Record(layout)
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.PIPELINE, 1),
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self.d, self.q)
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def get_process_fragment(self):
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sigs_d = self.d.flatten()
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sigs_q = self.q.flatten()
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sync = [If(self.pipe_ce, Cat(*sigs_q).eq(Cat(*sigs_d)))]
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return Fragment(sync=sync)
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class Combinator(Actor):
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def __init__(self, layout, *subrecords):
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self.destination = Record(layout)
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self.ins = [self.destination.subrecord(*subr) for subr in subrecords]
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.COMBINATORIAL),
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self.ins, self.destination)
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def get_process_fragment(self):
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return Fragment() # nothing to do
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def get_control_fragment(self):
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source = self.sources()[0]
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sinks = self.sinks()
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comb = [source.stb.eq(optree('&', [sink.stb for sink in sinks]))]
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comb += [sink.ack.eq(source.ack & source.stb) for sink in sinks]
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return Fragment(comb)
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class Splitter(Actor):
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def __init__(self, layout, *subrecords):
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self.source = Record(layout)
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self.outs = [self.source.subrecord(*subr) for subr in subrecords]
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.COMBINATORIAL),
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self.source, self.outs)
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def get_process_fragment(self):
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return Fragment() # nothing to do
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# TODO def get_control_fragment(self):
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