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49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
#
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# This file is part of LiteEth.
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#
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# Copyright (c) 2015-2020 Florent Kermarrec <florent@enjoy-digital.fr>
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# Copyright (c) 2015 Sebastien Bourdeauducq <sb@m-labs.hk>
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# Copyright (c) 2018 whitequark <whitequark@whitequark.org>
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# SPDX-License-Identifier: BSD-2-Clause
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from liteeth.common import *
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# MAC TX Last BE -----------------------------------------------------------------------------------
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class LiteEthMACTXLastBE(Module):
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def __init__(self, dw):
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self.sink = sink = stream.Endpoint(eth_phy_description(dw))
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self.source = source = stream.Endpoint(eth_phy_description(dw))
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# # #
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ongoing = Signal(reset=1)
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self.sync += [
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If(sink.valid & sink.ready,
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If(sink.last,
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ongoing.eq(1)
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).Elif(sink.last_be,
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ongoing.eq(0)
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)
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)
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]
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self.comb += [
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source.valid.eq(sink.valid & ongoing),
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source.last.eq(sink.last_be),
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source.data.eq(sink.data),
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sink.ready.eq(source.ready)
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]
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# MAC RX Last BE -----------------------------------------------------------------------------------
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class LiteEthMACRXLastBE(Module):
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def __init__(self, dw):
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self.sink = sink = stream.Endpoint(eth_phy_description(dw))
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self.source = source = stream.Endpoint(eth_phy_description(dw))
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# # #
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self.comb += [
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sink.connect(source),
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source.last_be.eq(sink.last)
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]
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