def daq():
instrument = NIDAQmxInstrument(model_number=device_model_number)
# configure port0.line0 and line1 to inputs
instrument.port0.line0
instrument.port0.line1
# configure ao lines to 0V
instrument.ao0 = 0
instrument.ao1 = 0
yield instrument
from daqmx import NIDAQmxInstrument # tested with NI USB-6001 # which has the following digital inputs: # - port0/line0 through line7 # - port1/line0 through line3 # - port2/line0 # first, we allocate the hardware using the automatic hardware allocation # available to the instrument; this is safe when there is only one NIDAQmx # instrument, but you may wish to specify a serial number or model number # for a safer experience daq = NIDAQmxInstrument() print(daq) # read the True or False state on the digital outputs # by reading the `portX` and `lineX` attributes; you # may wish to use the 5V output available to force the # pin to a state print(daq.port0.line0) print(daq.port0.line1) # !!! IMPORTANT !!!! # if you set the value of a port/line, the hardware will be changed to an # output; however if you read the value using the similar syntax, the hardware # will be changed to an input!
def test_hardware_acq_dev_name_invalid():
with pytest.raises(ValueError):
daq = NIDAQmxInstrument(device_name='DevBlah')
def test_hardware_acq_dev_name():
daq = NIDAQmxInstrument(device_name=device_name)
assert daq.model == device_model_number
def test_hardware_acq_sn_int():
daq = NIDAQmxInstrument(serial_number=int(device_serial_number, 16))
assert daq.model == device_model_number
def test_hardware_acq_no_param():
daq = NIDAQmxInstrument()
assert daq.model == device_model_number
from daqmx import NIDAQmxInstrument # tested with NI USB-6001 # first, we allocate the hardware using the automatic hardware allocation # available to the instrument; this is safe when there is only one NIDAQmx # instrument, but you may wish to specify a serial number or model number # for a safer experience daq = NIDAQmxInstrument() print(daq) # printing the instrument will result in showing the # device name, model number, and serial number # you may also want to specify a particular device name, as assigned by # the DAQmx interface; this is usually something like `Dev3`, although # I believe that it may be renamed through the DAQmx interface daq = NIDAQmxInstrument(device_name='Dev3') print(daq) # you might also simply wish to specify the model number to acquire daq = NIDAQmxInstrument(model_number='USB-6001') print(daq) # further, you may wish to specify a particular serial number daq = NIDAQmxInstrument(serial_number='1B5D996') # <-- the serial number, as print(daq) # read off the back of the # device in a hex format, is # entered as a string daq = NIDAQmxInstrument(serial_number=28694934) # <-- this is the same device, print(daq) # entering the serial number # as an integer instead of as
from daqmx import NIDAQmxInstrument
# tested with NI USB-6001
# which has the following analog outputs:
# - ao0
# - ao1
# first, we allocate the hardware using the automatic hardware
# allocation available to the instrument; this is safe when there
# is only one NIDAQmx instrument, but you may wish to specify a
# serial number or model number for a safer experience
daq = NIDAQmxInstrument()
print(daq)
# set the voltage on the analog outputs by setting the
# attribute `aoX`; use your multimeter to verify!
daq.ao0 = 1.02
daq.ao1 = 2.04
# once the attribute is set, you should be able to read
# it on the daq; if the attribute hasn't been set, this
# will result in an error (for now)
print(f'ao0: {daq.ao0:.2f}V')
# if you set an attribute on an output that doesn't exist,
# then the attribute will be set on the object, but nothing
# will happen! be sure that you are setting valid attributes
daq.ao2 = 3.0
print(daq.ao2) # <-- there is no "ao2"!!!