def host_expect_packet(self, packet, msg=None):
self.monitor.prime()
result = yield self.monitor.wait_for_recv(1e9) # 1 ms max
if result is None:
current = get_sim_time("us")
raise TestFailure(f"No full packet received @{current}")
yield RisingEdge(self.dut.clk48_host)
self.dut.usb_d_p = 1
self.dut.usb_d_n = 0
# Check the packet received matches
expected = pp_packet(wrap_packet(packet))
actual = pp_packet(result)
nak = pp_packet(wrap_packet(handshake_packet(PID.NAK)))
if (actual == nak) and (expected != nak):
self.dut._log.warning("Got NAK, retry")
yield Timer(self.RETRY_INTERVAL, 'us')
return
else:
self.retry = False
if expected == actual:
#self.dut._log.info("Received expected {}".format(msg))
Analyze.received(actual)
else:
#self.dut._log.warning(msg)
Analyze.explain(actual, expected)
raise TestError(msg)
def host_send(self, data01, addr, epnum, data, expected=PID.ACK):
"""Send data out the virtual USB connection, including an OUT token."""
self.retry = True
while self.retry:
# Do we still have time?
current = get_sim_time("us")
self.dut._log.info("Sending data at {:.0f}, deadline {:.0f}"
.format(current, self.packet_deadline))
if current > self.packet_deadline:
raise TestFailure("Did not finish data transfer in time")
yield self.host_send_token_packet(PID.OUT, addr, epnum)
yield self.host_send_data_packet(data01, data)
yield self.host_expect_packet(handshake_packet(expected),
"Expected {} packet."
.format(expected))
def host_expect_stall(self):
"""Expect a STALL packet."""
yield self.host_expect_packet(handshake_packet(PID.STALL),
"Expected STALL packet.")
def host_expect_nak(self):
"""Expect a NAK packet."""
yield self.host_expect_packet(handshake_packet(PID.NAK),
"Expected NAK packet.")
def host_expect_ack(self):
"""Expect an ACK packet."""
yield self.host_expect_packet(handshake_packet(PID.ACK),
"Expected ACK packet.")
def host_send_ack(self):
yield self._host_send_packet(handshake_packet(PID.ACK))