litex/misoclib/liteeth/example_designs/test/test_tty.py

import socket
import threading

def test(fpga_ip, udp_port, test_message):
	tx_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
	rx_sock  = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
	rx_sock.bind(("", udp_port))
	rx_sock.settimeout(0.5)

	def receive():
		while True:
			try:
				msg = rx_sock.recv(8192)
				for byte in msg:
					print(chr(byte), end="")
			except:
				break

	def send():
		tx_sock.sendto(bytes(test_message, "utf-8"), (fpga_ip, udp_port))

	receive_thread = threading.Thread(target=receive)
	receive_thread.start()

	send_thread = threading.Thread(target=send)
	send_thread.start()

	try:
		send_thread.join(5)
		send_thread.join(5)
	except KeyboardInterrupt:
		pass

def main(wb):
	test_message = "LiteEth virtual TTY Hello world\n"
	test("192.168.1.40", 10000, test_message)