class AvalonSTTB(object):
"""Testbench for avalon basic stream"""
def __init__(self, dut):
self.dut = dut
self.clkedge = RisingEdge(dut.clk)
self.stream_in = AvalonSTDriver(self.dut, "asi", dut.clk)
self.stream_out = AvalonSTMonitor(self.dut, "aso", dut.clk)
with warnings.catch_warnings():
warnings.simplefilter("ignore")
self.scoreboard = Scoreboard(self.dut, fail_immediately=True)
self.expected_output = []
self.scoreboard.add_interface(self.stream_out, self.expected_output)
self.backpressure = BitDriver(self.dut.aso_ready, self.dut.clk)
@cocotb.coroutine
def initialise(self):
self.dut.reset <= 0
cocotb.fork(Clock(self.dut.clk, 10).start())
for _ in range(3):
yield self.clkedge
self.dut.reset <= 1
yield self.clkedge
@cocotb.coroutine
def send_data(self, data):
exp_data = struct.pack("B", data)
self.expected_output.append(exp_data)
yield self.stream_in.send(data)
def __init__(self, dut):
self.dut = dut
self.clkedge = RisingEdge(dut.clk)
self.stream_in = AvalonSTDriver(self.dut, "asi", dut.clk)
self.stream_out = AvalonSTMonitor(self.dut, "aso", dut.clk)
self.scoreboard = Scoreboard(self.dut, fail_immediately=True)
self.expected_output = []
self.scoreboard.add_interface(self.stream_out, self.expected_output)
self.backpressure = BitDriver(self.dut.aso_ready, self.dut.clk)