trashernet/cocotb/cocotb_top_mac_test.py

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#!/usr/bin/env python
import cocotb
from cocotb.triggers import *
from cocotb.result import *
from cocotb.queue import Queue
from cocotb_helpers import buffers
ETH_HEAD = b'\x55\x55\x55\x55\xD5'
async def timeout(dut):
await Timer(1, units="ms")
assert False, "Timeout"
async def rxprinter(dut, rx):
while True:
frame = await rx.queue.get()
dut._log.info("RX Frame: " + str(frame))
@cocotb.test()
async def my_test(dut):
"""TBD description."""
# Start verification components
eth_tx = buffers.tx_buffer(dut, "cocovc_eth_inst.cocotb_tx_")
await eth_tx.start()
eth_rx = buffers.rx_buffer(dut, "cocovc_eth_inst.cocotb_rx_")
await eth_rx.start()
# Start local monitors
await cocotb.start(rxprinter(dut, eth_rx))
# Start timeout
await cocotb.start(timeout(dut))
# Wait for VHDL part to be ready
await Edge(dut.bench_ready)
# Start test procedure
await Timer(400, units="us") # The device will send a frame at startup
dut._log.info("Send first frame"); # This will trigger a response frame
await eth_tx.send(ETH_HEAD + b'\x00\xff\xff\x11"3\x00\xff\xff\xaa\xbb\xcc\x00\n\n\t\x08\x07\x06\x05\x04\x03\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00!\x10\x90\xe0');
dut._log.info("Send second frame");
await eth_tx.send(ETH_HEAD + b'World');
await Timer(400, units="us") # Wait for response