def update_value(self):
channel = self.get_channel_num()
ai_range = self.get_range()
try:
# Get a value from the device
if self.ai_props.resolution <= 16:
# Use the v_in method for devices with a resolution <= 16
# (optional parameter omitted)
value = ul.v_in(self.board_num, channel, ai_range)
else:
# Use the v_in_32 method for devices with a resolution > 16
# (optional parameter omitted)
value = ul.v_in_32(self.board_num, channel, ai_range)
# Display the raw value
self.value_label["text"] = '{:.3f}'.format(value)
# Call this method again until the stop button is pressed (or an
# error occurs)
if self.running:
self.after(100, self.update_value)
except ULError as e:
self.stop()
self.show_ul_error(e)
def run_example():
# By default, the example detects and displays all available devices and
# selects the first device listed. Use the dev_id_list variable to filter
# detected devices by device ID (see UL documentation for device IDs).
# If use_device_detection is set to False, the board_num variable needs to
# match the desired board number configured with Instacal.
use_device_detection = True
dev_id_list = []
board_num = 0
try:
if use_device_detection:
config_first_detected_device(board_num, dev_id_list)
daq_dev_info = DaqDeviceInfo(board_num)
if not daq_dev_info.supports_analog_input:
raise Exception('Error: The DAQ device does not support '
'analog input')
print('\nActive DAQ device: ',
daq_dev_info.product_name,
' (',
daq_dev_info.unique_id,
')\n',
sep='')
ai_info = daq_dev_info.get_ai_info()
ai_range = ai_info.supported_ranges[0]
channel = 0
# Get a value from the device
if ai_info.resolution <= 16:
# Use the v_in method for devices with a resolution <= 16
# (optional parameter omitted)
value = ul.v_in(board_num, channel, ai_range)
else:
# Use the v_in_32 method for devices with a resolution > 16
# (optional parameter omitted)
value = ul.v_in_32(board_num, channel, ai_range)
# Display the value
print('Value:', value)
except Exception as e:
print('\n', e)
finally:
if use_device_detection:
ul.release_daq_device(board_num)
def run_example():
board_num = 0
if use_device_detection:
ul.ignore_instacal()
if not util.config_first_detected_device(board_num):
print("Could not find device.")
return
channel = 0
ai_props = AnalogInputProps(board_num)
if ai_props.num_ai_chans < 1:
util.print_unsupported_example(board_num)
return
ai_range = ai_props.available_ranges[0]
try:
# Get a value from the device
if ai_props.resolution <= 16:
# Use the v_in method for devices with a resolution <= 16
# (optional parameter omitted)
value = ul.v_in(board_num, channel, ai_range)
else:
# Use the v_in_32 method for devices with a resolution > 16
# (optional parameter omitted)
value = ul.v_in_32(board_num, channel, ai_range)
# Display the value
print("Value: " + str(value))
except ULError as e:
util.print_ul_error(e)
finally:
if use_device_detection:
ul.release_daq_device(board_num)