def connect(self):
"""Connects to the roaster and creates communication thread."""
port = utils.find_device('1A86:5523')
self._ser = serial.Serial(port=port,
baudrate=9600,
bytesize=8,
parity='N',
stopbits=1.5,
timeout=.25,
xonxoff=False,
rtscts=False,
dsrdtr=False)
self._initialize()
self.comm_process = mp.Process(target=self.comm)
self.comm_process.start()
self.time_process = mp.Process(target=self.timer)
self.time_process.start()
def connect(self):
"""Connects to the roaster and creates communication thread."""
port = utils.find_device('1A86:5523')
self._ser = serial.Serial(
port=port,
baudrate=9600,
bytesize=8,
parity='N',
stopbits=1.5,
timeout=.25,
xonxoff=False,
rtscts=False,
dsrdtr=False)
self._initialize()
self.comm_process = mp.Process(target=self.comm)
self.comm_process.start()
self.time_process= mp.Process(target=self.timer)
self.time_process.start()
def _connect(self):
"""Do not call this directly - call auto_connect() or connect(),
which will call _connect() for you.
Connects to the roaster and creates communication thread.
Raises a RoasterLokkupError exception if the hardware is not found.
"""
# the following call raises a RoasterLookupException when the device
# is not found. It is
port = utils.find_device('1A86:5523')
# on some systems, after the device port is added to the device list,
# it can take up to 20 seconds after USB insertion for
# the port to become available... (!)
# let's put a safety timeout in here as a precaution
wait_timeout = time.time() + 40.0 # should be PLENTY of time!
# let's update the _connect_state while we're at it...
self._connect_state.value = self.CS_CONNECTING
connect_success = False
while time.time() < wait_timeout:
try:
self._ser = serial.Serial(
port=port,
baudrate=9600,
bytesize=8,
parity='N',
stopbits=1.5,
timeout=0.25,
xonxoff=False,
rtscts=False,
dsrdtr=False)
connect_success = True
break
except serial.SerialException:
time.sleep(0.5)
if not connect_success:
# timeout on attempts
raise exceptions.RoasterLookupError
self._initialize()
def test_find_device_with_device_unavailable(self, mock_comports):
with self.assertRaises(exceptions.RoasterLookupError):
utils.find_device('1234:5678')
def test_find_device_with_device_available(self, mock_comports):
device_path = utils.find_device('1A86:5523')
self.assertEqual(device_path, '/dev/tty2')
def test_find_device_with_device_unavailable(self, mock_comports):
with self.assertRaises(exceptions.RoasterLookupError):
utils.find_device('1234:5678')
def test_find_device_with_device_available(self, mock_comports):
device_path = utils.find_device('1A86:5523')
self.assertEqual(device_path, '/dev/tty2')
