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core/udp: Simplify LiteEthUDPTX.

This commit is contained in:
Florent Kermarrec 2021-09-22 16:54:41 +02:00
parent 8f05e72f99
commit a6298975bd
1 changed files with 17 additions and 12 deletions
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29
liteeth/core/udp.py
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@ -107,24 +107,27 @@ class LiteEthUDPTX(Module):
# # #
# Packetizer.
self.submodules.packetizer = packetizer = LiteEthUDPPacketizer(dw=dw)
# Data-Path.
self.comb += [
packetizer.sink.valid.eq(sink.valid),
packetizer.sink.last.eq(sink.last),
packetizer.sink.last_be.eq(sink.last_be),
sink.ready.eq(packetizer.sink.ready),
packetizer.sink.src_port.eq(sink.src_port),
packetizer.sink.dst_port.eq(sink.dst_port),
sink.connect(packetizer.sink, keep={
"valid",
"ready",
"last",
"last_be",
"src_port",
"dst_port",
"data"}),
packetizer.sink.length.eq(sink.length + udp_header.length),
packetizer.sink.checksum.eq(0), # Disabled (MAC CRC is enough)
packetizer.sink.data.eq(sink.data)
packetizer.sink.checksum.eq(0), # UDP Checksum is not used, we only rely on MAC CRC.
]
# Control-Path (FSM).
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
fsm.act("IDLE",
packetizer.source.ready.eq(1),
If(packetizer.source.valid,
packetizer.source.ready.eq(0),
NextState("SEND")
)
)
@ -133,8 +136,10 @@ class LiteEthUDPTX(Module):
source.length.eq(packetizer.sink.length),
source.protocol.eq(udp_protocol),
source.ip_address.eq(sink.ip_address),
If(source.valid & source.last & source.ready,
NextState("IDLE")
If(source.valid & source.ready,
If(source.last,
NextState("IDLE")
)
)
)