27 lines
666 B
Python
27 lines
666 B
Python
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from migen import *
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from migen.genlib.fifo import SyncFIFO
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class Buffer(Module):
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def __init__(self, width=8, depth=128):
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self.din = Signal(width)
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self.i_stb = Signal()
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self.dout = Signal(width)
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self.o_stb = Signal()
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self.o_ack = Signal()
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# Underlying data structure
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self.submodules.fifo = SyncFIFO(width, depth)
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self.comb += [
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# TX path
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self.o_stb.eq(self.fifo.readable),
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self.dout.eq(self.fifo.dout),
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self.fifo.re.eq(self.o_ack),
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# RX path
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self.fifo.we.eq(self.i_stb),
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self.fifo.din.eq(self.din),
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]
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