litex/liteeth/test/arp_tb.py

from migen.fhdl.std import *
from migen.bus import wishbone
from migen.bus.transactions import *
from migen.sim.generic import run_simulation

from liteeth.common import *
from liteeth.mac import LiteEthMAC
from liteeth.arp import LiteEthARP

from liteeth.test.common import *
from liteeth.test.model import phy, mac, arp

ip_address = 0x12345678
mac_address = 0x12345678abcd

class TB(Module):
	def __init__(self):
		self.submodules.phy_model = phy.PHY(8, debug=True)
		self.submodules.mac_model = mac.MAC(self.phy_model, debug=True, loopback=False)
		self.submodules.arp_model = arp.ARP(self.mac_model, mac_address, ip_address, debug=True)

		self.submodules.core = LiteEthMAC(phy=self.phy_model, dw=8, with_hw_preamble_crc=True)
		self.submodules.arp = LiteEthARP(mac_address, ip_address)

		# use sys_clk for each clock_domain
		self.clock_domains.cd_eth_rx = ClockDomain()
		self.clock_domains.cd_eth_tx = ClockDomain()
		self.comb += [
			self.cd_eth_rx.clk.eq(ClockSignal()),
			self.cd_eth_rx.rst.eq(ResetSignal()),
			self.cd_eth_tx.clk.eq(ClockSignal()),
			self.cd_eth_tx.rst.eq(ResetSignal()),
		]

		self.comb += [
			Record.connect(self.arp.source, self.core.sink),
			Record.connect(self.core.source, self.arp.sink)
		]

	def gen_simulation(self, selfp):
		selfp.cd_eth_rx.rst = 1
		selfp.cd_eth_tx.rst = 1
		yield
		selfp.cd_eth_rx.rst = 0
		selfp.cd_eth_tx.rst = 0

		for i in range(100):
			yield

		selfp.arp.table.request.ip_address = 0x12345678
		selfp.arp.table.request.stb = 1

if __name__ == "__main__":
	run_simulation(TB(), ncycles=1024, vcd_name="my.vcd", keep_files=True)