def __init__(self, identifier):
self.sink = sink = stream.Endpoint(
eth_etherbone_packet_user_description(32))
self.source = source = stream.Endpoint(user_description(32))
# # #
self.submodules.packetizer = packetizer = EtherbonePacketPacketizer()
self.comb += [
packetizer.sink.valid.eq(sink.valid),
packetizer.sink.last.eq(sink.last),
sink.ready.eq(packetizer.sink.ready),
packetizer.sink.magic.eq(etherbone_magic),
packetizer.sink.port_size.eq(32 // 8),
packetizer.sink.addr_size.eq(32 // 8),
packetizer.sink.pf.eq(sink.pf),
packetizer.sink.pr.eq(sink.pr),
packetizer.sink.nr.eq(sink.nr),
packetizer.sink.version.eq(etherbone_version),
packetizer.sink.data.eq(sink.data)
]
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")))
fsm.act(
"SEND", packetizer.source.connect(source),
source.dst.eq(identifier),
source.length.eq(sink.length + etherbone_packet_header.length),
If(source.valid & source.last & source.ready, NextState("IDLE")))
def eth_etherbone_packet_user_description(dw):
param_layout = etherbone_packet_header.get_layout()
param_layout = _remove_from_layout(param_layout, "magic", "portsize",
"addrsize", "version")
param_layout += user_description(dw).param_layout
payload_layout = [("data", dw), ("error", dw // 8)]
return EndpointDescription(payload_layout, param_layout)
def __init__(self):
self.sink = sink = stream.Endpoint(user_description(32))
self.source = source = stream.Endpoint(
eth_etherbone_packet_user_description(32))
# # #
self.submodules.depacketizer = depacketizer = EtherbonePacketDepacketizer(
)
self.comb += sink.connect(depacketizer.sink)
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
fsm.act(
"IDLE", depacketizer.source.ready.eq(1),
If(depacketizer.source.valid, depacketizer.source.ready.eq(0),
NextState("CHECK")))
valid = Signal()
self.sync += valid.eq(depacketizer.source.valid
& (depacketizer.source.magic == etherbone_magic))
fsm.act("CHECK",
If(valid, NextState("PRESENT")).Else(NextState("DROP")))
self.comb += [
source.last.eq(depacketizer.source.last),
source.pf.eq(depacketizer.source.pf),
source.pr.eq(depacketizer.source.pr),
source.nr.eq(depacketizer.source.nr),
source.data.eq(depacketizer.source.data),
source.length.eq(sink.length - etherbone_packet_header.length)
]
fsm.act(
"PRESENT", source.valid.eq(depacketizer.source.valid),
depacketizer.source.ready.eq(source.ready),
If(source.valid & source.last & source.ready, NextState("IDLE")))
fsm.act(
"DROP", depacketizer.source.ready.eq(1),
If(
depacketizer.source.valid & depacketizer.source.last
& depacketizer.source.ready, NextState("IDLE")))
def __init__(self):
Packetizer.__init__(self, eth_etherbone_packet_description(32),
user_description(32), etherbone_packet_header)
