liteeth/test/arp_tb.py

   1 from migen.fhdl.std import *
   2 from migen.bus import wishbone
   3 from migen.bus.transactions import *
   4 from migen.sim.generic import run_simulation
   5
   6 from liteeth.common import *
   7 from liteeth.mac import LiteEthMAC
   8 from liteeth.arp import LiteEthARP
   9
  10 from liteeth.test.common import *
  11 from liteeth.test.model import phy, mac, arp
  12
  13 ip_address = 0x12345678
  14 mac_address = 0x12345678abcd
  15
  16 class TB(Module):
  17         def __init__(self):
  18                 self.submodules.phy_model = phy.PHY(8, debug=True)
  19                 self.submodules.mac_model = mac.MAC(self.phy_model, debug=True, loopback=False)
  20                 self.submodules.arp_model = arp.ARP(self.mac_model, mac_address, ip_address, debug=True)
  21
  22                 self.submodules.mac = LiteEthMAC(self.phy_model, dw=8, with_hw_preamble_crc=True)
  23                 self.submodules.arp = LiteEthARP(self.mac, mac_address, ip_address)
  24
  25                 # use sys_clk for each clock_domain
  26                 self.clock_domains.cd_eth_rx = ClockDomain()
  27                 self.clock_domains.cd_eth_tx = ClockDomain()
  28                 self.comb += [
  29                         self.cd_eth_rx.clk.eq(ClockSignal()),
  30                         self.cd_eth_rx.rst.eq(ResetSignal()),
  31                         self.cd_eth_tx.clk.eq(ClockSignal()),
  32                         self.cd_eth_tx.rst.eq(ResetSignal()),
  33                 ]
  34
  35         def gen_simulation(self, selfp):
  36                 selfp.cd_eth_rx.rst = 1
  37                 selfp.cd_eth_tx.rst = 1
  38                 yield
  39                 selfp.cd_eth_rx.rst = 0
  40                 selfp.cd_eth_tx.rst = 0
  41
  42                 for i in range(100):
  43                         yield
  44
  45                 while selfp.arp.table.request.ack != 1:
  46                         selfp.arp.table.request.stb = 1
  47                         selfp.arp.table.request.ip_address = 0x12345678
  48                         yield
  49                 selfp.arp.table.request.stb = 0
  50                 while selfp.arp.table.response.stb != 1:
  51                         selfp.arp.table.response.ack = 1
  52                         yield
  53                 print("Model MAC : 0x%12x" %selfp.arp.table.response.mac_address)
  54
  55
  56 if __name__ == "__main__":
  57         run_simulation(TB(), ncycles=2048, vcd_name="my.vcd", keep_files=True)