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
ao_props = AnalogOutputProps(board_num)
if ao_props.num_chans < 1:
util.print_unsupported_example(board_num)
return
ao_range = ao_props.available_ranges[0]
data_value = ao_range.range_max / 2
try:
print("Outputting " + str(data_value) + " Volts to channel " +
str(channel) + ".")
# Send the value to the device (optional parameter omitted)
ul.v_out(board_num, channel, ao_range, data_value)
except ULError as e:
util.print_ul_error(e)
finally:
if use_device_detection:
ul.release_daq_device(board_num)
def _get_supports_v_out(self, available_ranges):
if len(available_ranges) == 0:
return False
try:
ul.v_out(self._board_num, 0, available_ranges[0], 0)
except ULError:
return False
return True
def update_value(self):
channel = self.get_channel_num()
ao_range = self.ao_info.supported_ranges[0]
data_value = self.get_data_value()
try:
# Send the value to the device (optional parameter omitted)
ul.v_out(self.board_num, channel, ao_range, data_value)
except ULError as e:
show_ul_error(e)
def supports_v_out(self):
ranges_supported = self.supported_ranges
v_out_supported = False
if ranges_supported:
try:
ul.v_out(self._board_num, 0, ranges_supported[0], 0)
v_out_supported = True
except ULError:
v_out_supported = False
return v_out_supported
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_output:
raise Exception('Error: The DAQ device does not support '
'analog output')
print('\nActive DAQ device: ',
daq_dev_info.product_name,
' (',
daq_dev_info.unique_id,
')\n',
sep='')
ao_info = daq_dev_info.get_ao_info()
ao_range = ao_info.supported_ranges[0]
channel = 0
data_value = ao_range.range_max / 2
print('Outputting', data_value, 'Volts to channel', channel)
# Send the value to the device (optional parameter omitted)
ul.v_out(board_num, channel, ao_range, data_value)
except Exception as e:
print('\n', e)
finally:
if use_device_detection:
ul.release_daq_device(board_num)
