39 lines
949 B
Python
39 lines
949 B
Python
from liteeth.common import *
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from liteeth.mac.common import *
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class LiteEthMACTXLastBE(Module):
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def __init__(self, dw):
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self.sink = sink = Sink(eth_phy_description(dw))
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self.source = source = Source(eth_phy_description(dw))
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###
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ongoing = Signal()
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self.sync += \
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If(sink.stb & sink.ack,
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If(sink.sop,
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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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self.comb += [
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source.stb.eq(sink.stb & (sink.sop | ongoing)),
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source.sop.eq(sink.sop),
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source.eop.eq(sink.last_be),
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source.data.eq(sink.data),
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sink.ack.eq(source.ack)
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]
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class LiteEthMACRXLastBE(Module):
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def __init__(self, dw):
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self.sink = sink = Sink(eth_phy_description(dw))
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self.source = source = Source(eth_phy_description(dw))
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###
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self.comb += [
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source.stb.eq(sink.stb),
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source.sop.eq(sink.sop),
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source.eop.eq(sink.eop),
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source.data.eq(sink.data),
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source.last_be.eq(sink.eop),
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sink.ack.eq(source.ack)
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]
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