liteeth/core/etherbone/probe.py

   1 from liteeth.common import *
   2
   3 class LiteEthEtherboneProbe(Module):
   4         def __init__(self):
   5                 self.sink = sink = Sink(eth_etherbone_packet_user_description(32))
   6                 self.source = source = Source(eth_etherbone_packet_user_description(32))
   7
   8                 self.submodules.fsm = fsm = FSM(reset_state="IDLE")
   9
  10                 fsm.act("IDLE",
  11                         sink.ack.eq(1),
  12                         If(sink.stb & sink.sop,
  13                                 sink.ack.eq(0),
  14                                 NextState("PROBE_RESPONSE")
  15                         )
  16                 )
  17                 fsm.act("PROBE_RESPONSE",
  18                         Record.connect(sink, source),
  19                         source.pf.eq(0),
  20                         source.pr.eq(1),
  21                         If(source.stb & source.eop & source.ack,
  22                                 NextState("IDLE")
  23                         )
  24                 )