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corundum/tb/test_eth_mac_1g.py

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#!/usr/bin/env python
"""
Copyright (c) 2015 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
from myhdl import *
import os
try:
from queue import Queue
except ImportError:
from Queue import Queue
import axis_ep
import eth_ep
import gmii_ep
module = 'eth_mac_1g'
srcs = []
srcs.append("../rtl/%s.v" % module)
srcs.append("../rtl/eth_crc_8.v")
srcs.append("../rtl/eth_mac_1g_rx.v")
srcs.append("../rtl/eth_mac_1g_tx.v")
srcs.append("test_%s.v" % module)
src = ' '.join(srcs)
build_cmd = "iverilog -o test_%s.vvp %s" % (module, src)
def dut_eth_mac_1g(clk,
rst,
current_test,
rx_clk,
rx_rst,
tx_clk,
tx_rst,
tx_axis_tdata,
tx_axis_tvalid,
tx_axis_tready,
tx_axis_tlast,
tx_axis_tuser,
rx_axis_tdata,
rx_axis_tvalid,
rx_axis_tlast,
rx_axis_tuser,
gmii_rxd,
gmii_rx_dv,
gmii_rx_er,
gmii_txd,
gmii_tx_en,
gmii_tx_er,
rx_error_bad_frame,
rx_error_bad_fcs,
ifg_delay):
if os.system(build_cmd):
raise Exception("Error running build command")
return Cosimulation("vvp -m myhdl test_%s.vvp -lxt2" % module,
clk=clk,
rst=rst,
current_test=current_test,
rx_clk=rx_clk,
rx_rst=rx_rst,
tx_clk=tx_clk,
tx_rst=tx_rst,
tx_axis_tdata=tx_axis_tdata,
tx_axis_tvalid=tx_axis_tvalid,
tx_axis_tready=tx_axis_tready,
tx_axis_tlast=tx_axis_tlast,
tx_axis_tuser=tx_axis_tuser,
rx_axis_tdata=rx_axis_tdata,
rx_axis_tvalid=rx_axis_tvalid,
rx_axis_tlast=rx_axis_tlast,
rx_axis_tuser=rx_axis_tuser,
gmii_rxd=gmii_rxd,
gmii_rx_dv=gmii_rx_dv,
gmii_rx_er=gmii_rx_er,
gmii_txd=gmii_txd,
gmii_tx_en=gmii_tx_en,
gmii_tx_er=gmii_tx_er,
rx_error_bad_frame=rx_error_bad_frame,
rx_error_bad_fcs=rx_error_bad_fcs,
ifg_delay=ifg_delay)
def bench():
# Parameters
ENABLE_PADDING = 1
MIN_FRAME_LENGTH = 64
# Inputs
clk = Signal(bool(0))
rst = Signal(bool(0))
current_test = Signal(intbv(0)[8:])
rx_clk = Signal(bool(0))
rx_rst = Signal(bool(0))
tx_clk = Signal(bool(0))
tx_rst = Signal(bool(0))
tx_axis_tdata = Signal(intbv(0)[8:])
tx_axis_tvalid = Signal(bool(0))
tx_axis_tlast = Signal(bool(0))
tx_axis_tuser = Signal(bool(0))
gmii_rxd = Signal(intbv(0)[8:])
gmii_rx_dv = Signal(bool(0))
gmii_rx_er = Signal(bool(0))
ifg_delay = Signal(intbv(0)[8:])
# Outputs
tx_axis_tready = Signal(bool(0))
rx_axis_tdata = Signal(intbv(0)[8:])
rx_axis_tvalid = Signal(bool(0))
rx_axis_tlast = Signal(bool(0))
rx_axis_tuser = Signal(bool(0))
gmii_txd = Signal(intbv(0)[8:])
gmii_tx_en = Signal(bool(0))
gmii_tx_er = Signal(bool(0))
rx_error_bad_frame = Signal(bool(0))
rx_error_bad_fcs = Signal(bool(0))
# sources and sinks
gmii_source_queue = Queue()
gmii_sink_queue = Queue()
axis_source_queue = Queue()
axis_source_pause = Signal(bool(0))
axis_sink_queue = Queue()
gmii_source = gmii_ep.GMIISource(rx_clk,
rx_rst,
txd=gmii_rxd,
tx_en=gmii_rx_dv,
tx_er=gmii_rx_er,
fifo=gmii_source_queue,
name='gmii_source')
gmii_sink = gmii_ep.GMIISink(tx_clk,
tx_rst,
rxd=gmii_txd,
rx_dv=gmii_tx_en,
rx_er=gmii_tx_er,
fifo=gmii_sink_queue,
name='gmii_sink')
axis_source = axis_ep.AXIStreamSource(tx_clk,
tx_rst,
tdata=tx_axis_tdata,
tvalid=tx_axis_tvalid,
tready=tx_axis_tready,
tlast=tx_axis_tlast,
tuser=tx_axis_tuser,
fifo=axis_source_queue,
pause=axis_source_pause,
name='axis_source')
axis_sink = axis_ep.AXIStreamSink(rx_clk,
rx_rst,
tdata=rx_axis_tdata,
tvalid=rx_axis_tvalid,
tlast=rx_axis_tlast,
tuser=rx_axis_tuser,
fifo=axis_sink_queue,
name='axis_sink')
# DUT
dut = dut_eth_mac_1g(clk,
rst,
current_test,
rx_clk,
rx_rst,
tx_clk,
tx_rst,
tx_axis_tdata,
tx_axis_tvalid,
tx_axis_tready,
tx_axis_tlast,
tx_axis_tuser,
rx_axis_tdata,
rx_axis_tvalid,
rx_axis_tlast,
rx_axis_tuser,
gmii_rxd,
gmii_rx_dv,
gmii_rx_er,
gmii_txd,
gmii_tx_en,
gmii_tx_er,
rx_error_bad_frame,
rx_error_bad_fcs,
ifg_delay)
@always(delay(4))
def clkgen():
clk.next = not clk
tx_clk.next = not tx_clk
rx_clk.next = not rx_clk
@instance
def check():
yield delay(100)
yield clk.posedge
rst.next = 1
tx_rst.next = 1
rx_rst.next = 1
yield clk.posedge
rst.next = 0
tx_rst.next = 0
rx_rst.next = 0
yield clk.posedge
yield delay(100)
yield clk.posedge
ifg_delay.next = 12
# testbench stimulus
yield clk.posedge
print("test 1: test rx packet")
current_test.next = 1
test_frame = eth_ep.EthFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x8000
test_frame.payload = bytearray(range(32))
test_frame.update_fcs()
axis_frame = test_frame.build_axis_fcs()
gmii_source_queue.put(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+bytearray(axis_frame))
yield clk.posedge
yield clk.posedge
while gmii_rx_dv or rx_axis_tvalid:
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not axis_sink_queue.empty():
rx_frame = axis_sink_queue.get()
eth_frame = eth_ep.EthFrame()
eth_frame.parse_axis(rx_frame)
eth_frame.update_fcs()
assert eth_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 2: test tx packet")
current_test.next = 2
test_frame = eth_ep.EthFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x8000
test_frame.payload = bytearray(range(32))
test_frame.update_fcs()
axis_frame = test_frame.build_axis()
axis_source_queue.put(axis_frame)
yield clk.posedge
yield clk.posedge
while gmii_tx_en or tx_axis_tvalid:
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not gmii_sink_queue.empty():
rx_frame = gmii_sink_queue.get()
assert rx_frame.data[0:8] == bytearray(b'\x55\x55\x55\x55\x55\x55\x55\xD5')
eth_frame = eth_ep.EthFrame()
eth_frame.parse_axis_fcs(rx_frame.data[8:])
print(hex(eth_frame.eth_fcs))
print(hex(eth_frame.calc_fcs()))
assert len(eth_frame.payload.data) == 46
assert eth_frame.eth_fcs == eth_frame.calc_fcs()
assert eth_frame.eth_dest_mac == test_frame.eth_dest_mac
assert eth_frame.eth_src_mac == test_frame.eth_src_mac
assert eth_frame.eth_type == test_frame.eth_type
assert eth_frame.payload.data.index(test_frame.payload.data) == 0
yield delay(100)
raise StopSimulation
return dut, axis_source, axis_sink, gmii_source, gmii_sink, clkgen, check
def test_bench():
sim = Simulation(bench())
sim.run()
if __name__ == '__main__':
print("Running test...")
test_bench()
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