def test_singlepoint_loopback(nixnet_in_interface, nixnet_out_interface):
database_name = 'NIXNET_example'
cluster_name = 'CAN_Cluster'
signal_names = ['CANEventSignal1', 'CANEventSignal2']
with nixnet.SignalInSinglePointSession(nixnet_in_interface, database_name,
cluster_name,
signal_names) as input_session:
with nixnet.SignalOutSinglePointSession(
nixnet_out_interface, database_name, cluster_name,
signal_names) as output_session:
# Start the input session manually to make sure that the first
# frame value sent before the initial read will be received.
input_session.start()
expected_signals = [24.5343, 77.0129]
output_session.signals.write(expected_signals)
# Wait 1 s and then read the received values.
# They should be the same as the ones sent.
time.sleep(1)
actual_signals = list(input_session.signals.read())
for expected, (_, actual) in zip(expected_signals, actual_signals):
assert pytest.approx(expected, rel=1) == actual
def main():
database_name = ':memory:'
cluster_name = 'LIN_Cluster'
ecu_1_name = 'LIN_ECU_1'
ecu_2_name = 'LIN_ECU_2'
schedule_name = 'LIN_Schedule_1'
schedule_entry_name = 'LIN_Schedule_Entry'
frame_name = 'LIN_Frame'
signal_1_name = 'LIN_Signal_1'
signal_2_name = 'LIN_Signal_2'
signal_list = [signal_1_name, signal_2_name]
output_interface = 'LIN1'
input_interface = 'LIN2'
# Open the default in-memory database.
with database.Database(database_name) as db:
# Add a LIN cluster, a frame, and two signals to the database.
cluster = db.clusters.add(cluster_name)
cluster.protocol = constants.Protocol.LIN
cluster.baud_rate = 19200
frame = cluster.frames.add(frame_name)
frame.id = 1
frame.payload_len = 2
signal_1 = frame.mux_static_signals.add(signal_1_name)
signal_1.byte_ordr = constants.SigByteOrdr.BIG_ENDIAN
signal_1.data_type = constants.SigDataType.UNSIGNED
signal_1.start_bit = 0
signal_1.num_bits = 8
signal_2 = frame.mux_static_signals.add(signal_2_name)
signal_2.byte_ordr = constants.SigByteOrdr.BIG_ENDIAN
signal_2.data_type = constants.SigDataType.UNSIGNED
signal_2.start_bit = 8
signal_2.num_bits = 8
# Add a LIN ECU and LIN Schedule to the cluster.
ecu_1 = cluster.ecus.add(ecu_1_name)
ecu_1.lin_protocol_ver = constants.LinProtocolVer.VER_2_2
ecu_1.lin_master = True
ecu_2 = cluster.ecus.add(ecu_2_name)
ecu_2.lin_protocol_ver = constants.LinProtocolVer.VER_2_2
ecu_2.lin_master = False
cluster.lin_tick = 0.01
schedule = cluster.lin_schedules.add(schedule_name)
schedule.priority = 0
schedule.run_mode = constants.LinSchedRunMode.CONTINUOUS
schedule_entry = schedule.entries.add(schedule_entry_name)
schedule_entry.delay = 1000.0
schedule_entry.type = constants.LinSchedEntryType.UNCONDITIONAL
schedule_entry.frames = [frame]
# Using the database we just created, write and then read a pair of signals.
with nixnet.SignalOutSinglePointSession(output_interface,
database_name, cluster_name,
signal_list) as output_session:
with nixnet.SignalInSinglePointSession(
input_interface, database_name, cluster_name,
signal_list) as input_session:
terminated_cable = six.moves.input(
'Are you using a terminated cable (Y or N)? ')
if terminated_cable.lower() == "y":
input_session.intf.lin_term = constants.LinTerm.ON
output_session.intf.lin_term = constants.LinTerm.OFF
elif terminated_cable.lower() == "n":
input_session.intf.lin_term = constants.LinTerm.ON
output_session.intf.lin_term = constants.LinTerm.ON
else:
print("Unrecognised input ({}), assuming 'n'".format(
terminated_cable))
input_session.intf.lin_term = constants.LinTerm.ON
output_session.intf.lin_term = constants.LinTerm.ON
# Start the input session manually to make sure that the first
# signal values sent before the initial read will be received.
input_session.start()
# Set the schedule. This will also automatically enable master mode.
output_session.change_lin_schedule(0)
# Generate a pair of random values and send out the signals.
output_values = [randint(0, 255), randint(0, 255)]
output_session.signals.write(output_values)
print('Sent signal values: {}'.format(output_values))
# Wait 1 s and then read the received values.
# They should be the same as the ones sent.
time.sleep(1)
input_signals = input_session.signals.read()
input_values = [
int(value) for timestamp, value in input_signals
]
print('Received signal values: {}'.format(input_values))
def main():
database_name = 'NIXNET_example'
cluster_name = 'CAN_Cluster'
input_signals = ['CANEventSignal1', 'CANEventSignal2']
output_signals = ['CANEventSignal1', 'CANEventSignal2']
interface1 = 'CAN1'
interface2 = 'CAN2'
with nixnet.SignalInSinglePointSession(
interface1,
database_name,
cluster_name,
input_signals) as input_session:
with nixnet.SignalOutSinglePointSession(
interface2,
database_name,
cluster_name,
output_signals) as output_session:
terminated_cable = six.moves.input('Are you using a terminated cable (Y or N)? ')
if terminated_cable.lower() == "y":
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.OFF
elif terminated_cable.lower() == "n":
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.ON
else:
print("Unrecognised input ({}), assuming 'n'".format(terminated_cable))
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.ON
# Start the input session manually to make sure that the first
# signal value sent before the initial read will be received.
input_session.start()
user_value = six.moves.input('Enter {} signal values [float, float]: '.format(len(input_signals)))
try:
value_buffer = [float(x.strip()) for x in user_value.split(",")]
except ValueError:
value_buffer = [24.5343, 77.0129]
print('Unrecognized input ({}). Setting data buffer to {}'.format(user_value, value_buffer))
if len(value_buffer) != len(input_signals):
value_buffer = [24.5343, 77.0129]
print('Invalid number of signal values entered. Setting data buffer to {}'.format(value_buffer))
print('The same values should be received. Press q to quit')
i = 0
while True:
for index, value in enumerate(value_buffer):
value_buffer[index] = value + i
output_session.signals.write(value_buffer)
print('Sent signal values: {}'.format(value_buffer))
# Wait 1 s and then read the received values.
# They should be the same as the ones sent.
time.sleep(1)
signals = input_session.signals.read()
for timestamp, value in signals:
date = convert_timestamp(timestamp)
print('Received signal with timestamp {} and value {}'.format(date, value))
i += 1
if max(value_buffer) + i > sys.float_info.max:
i = 0
inp = six.moves.input('Hit enter to continue (q to quit): ')
if inp.lower() == 'q':
break
print('Data acquisition stopped.')
def main():
database_name = ':memory:'
cluster_name = 'CAN_Cluster'
frame_name = 'CAN_Event_Frame'
signal_1_name = 'CAN_Event_Signal_1'
signal_2_name = 'CAN_Event_Signal_2'
signal_list = [signal_1_name, signal_2_name]
output_interface = 'CAN1'
input_interface = 'CAN2'
# Open the default in-memory database.
with database.Database(database_name) as db:
# Add a CAN cluster, a frame, and two signals to the database.
cluster = db.clusters.add(cluster_name)
cluster.protocol = constants.Protocol.CAN
cluster.baud_rate = 125000
frame = cluster.frames.add(frame_name)
frame.id = 1
frame.payload_len = 2
signal_1 = frame.mux_static_signals.add(signal_1_name)
signal_1.byte_ordr = constants.SigByteOrdr.BIG_ENDIAN
signal_1.data_type = constants.SigDataType.UNSIGNED
signal_1.start_bit = 0
signal_1.num_bits = 8
signal_2 = frame.mux_static_signals.add(signal_2_name)
signal_2.byte_ordr = constants.SigByteOrdr.BIG_ENDIAN
signal_2.data_type = constants.SigDataType.UNSIGNED
signal_2.start_bit = 8
signal_2.num_bits = 8
# Using the database we just created, write and then read a pair of signals.
with nixnet.SignalOutSinglePointSession(output_interface,
database_name, cluster_name,
signal_list) as output_session:
with nixnet.SignalInSinglePointSession(
input_interface, database_name, cluster_name,
signal_list) as input_session:
terminated_cable = six.moves.input(
'Are you using a terminated cable (Y or N)? ')
if terminated_cable.lower() == "y":
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.OFF
elif terminated_cable.lower() == "n":
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.ON
else:
print("Unrecognised input ({}), assuming 'n'".format(
terminated_cable))
input_session.intf.can_term = constants.CanTerm.ON
output_session.intf.can_term = constants.CanTerm.ON
# Start the input session manually to make sure that the first
# signal values sent before the initial read will be received.
input_session.start()
# Generate a pair of random values and send out the signals.
output_values = [randint(0, 255), randint(0, 255)]
output_session.signals.write(output_values)
print('Sent signal values: {}'.format(output_values))
# Wait 1 s and then read the received values.
# They should be the same as the ones sent.
time.sleep(1)
input_signals = input_session.signals.read()
input_values = [
int(value) for timestamp, value in input_signals
]
print('Received signal values: {}'.format(input_values))