litex/liteeth/test/etherbone_tb.py

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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.core import LiteEthUDPIPCore
from liteeth.core.etherbone import LiteEthEtherbone
from liteeth.test.common import *
from liteeth.test.model import phy, mac, arp, ip, udp, etherbone
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=False)
self.submodules.ip_model = ip.IP(self.mac_model, mac_address, ip_address, debug=True, loopback=False)
self.submodules.udp_model = udp.UDP(self.ip_model, ip_address, debug=True, loopback=False)
self.submodules.etherbone_model = etherbone.Etherbone(self.udp_model, debug=True)
self.submodules.core = LiteEthUDPIPCore(self.phy_model, mac_address, ip_address, 100000)
self.submodules.etherbone = LiteEthEtherbone(self.core.udp, 20000)
self.submodules.sram = wishbone.SRAM(1024)
self.submodules.interconnect = wishbone.InterconnectPointToPoint(self.etherbone.wishbone.bus, self.sram.bus)
# 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()),
]
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
# test probe
#packet = etherbone.EtherbonePacket()
#packet.pf = 1
#self.etherbone_model.send(packet)
# test writes
writes = etherbone.EtherboneWrites(base_addr=0x1000)
for i in range(16):
writes.add(etherbone.EtherboneWrite(i))
record = etherbone.EtherboneRecord()
record.writes = writes
record.reads = None
record.bca = 0
record.rca = 0
record.rff = 0
record.cyc = 0
record.wca = 0
record.wff = 0
record.byte_enable = 0
record.wcount = 16
record.rcount = 0
packet = etherbone.EtherbonePacket()
packet.records = [record]
print(packet)
self.etherbone_model.send(packet)
if __name__ == "__main__":
run_simulation(TB(), ncycles=1024, vcd_name="my.vcd", keep_files=True)