liteeth/__init__.py

   1 from liteeth.common import *
   2 from liteeth.generic.arbiter import Arbiter
   3 from liteeth.generic.dispatcher import Dispatcher
   4 from liteeth.mac import LiteEthMAC
   5
   6 class LiteEthIPStack(Module, AutoCSR):
   7         def __init__(self, phy,
   8                         mac_address= 0x12345678abcd,
   9                         ip_address="192.168.0.10"):
  10                 self.phy = phy
  11                 self.submodules.mac = mac = LiteEthMAC(phy, 8, interface="mac", with_hw_preamble_crc=True)
  12                 self.submodules.arp = arp = LiteEthARP(mac_address, ip_address)
  13                 self.submodules.ip = ip = LiteEthMACIP()
  14
  15                 # MAC dispatch
  16                 self.submodules.mac_dispatcher = mac_dispatcher = Dispatcher(mac.source, [arp.sink, ip.sink], one_hot=True)
  17                 self.comb += \
  18                         Case(mac.source.eth_type, {
  19                                 ethernet_type_arp       : [mac_dispatcher.sel.eq(1)],
  20                                 ethernet_type_ip        : [mac_dispatcher.sel.eq(2)],
  21                                 "default"                       : [mac_dispatcher.sel.eq(0)],
  22                         })
  23                 # MAC arbitrate
  24                 self.submodules.mac_arbiter = mac_arbiter = Arbiter([arp.source, ip.source], mac.sink)
  25
  26