from litex.gen import * from litex.gen.sim.generic import run_simulation from litex.soc.interconnect import wishbone from litex.soc.interconnect.stream_sim import * from liteeth.common import * from liteeth.core import LiteEthIPCore from test.model import phy, mac, arp, ip ip_address = 0x12345678 mac_address = 0x12345678abcd class TB(Module): def __init__(self): self.submodules.phy_model = phy.PHY(8, debug=False) self.submodules.mac_model = mac.MAC(self.phy_model, debug=False, 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=False, loopback=True) self.submodules.ip = LiteEthIPCore(self.phy_model, mac_address, ip_address, 100000) self.ip_port = self.ip.ip.crossbar.get_port(udp_protocol) # 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 while True: selfp.ip_port.sink.stb = 1 selfp.ip_port.sink.eop = 1 selfp.ip_port.sink.ip_address = 0x12345678 selfp.ip_port.sink.protocol = udp_protocol selfp.ip_port.source.ack = 1 if selfp.ip_port.source.stb == 1 and selfp.ip_port.source.eop == 1: print("packet from IP 0x{:08x}".format(selfp.ip_port.sink.ip_address)) yield if __name__ == "__main__": run_simulation(TB(), ncycles=2048, vcd_name="my.vcd", keep_files=True)