def get_sense_value(self, sample_freq=None, channel=0):
"""
Gets sense value of channel <channel>.
Parameters
----------
channel: int
Number of channel of interest. Default is 0 (ai0).
Returns
-------
val: float
Sense value.
"""
if sample_freq:
self._sample_freq[channel] = sample_freq
samples = int(self._sample_freq[channel] / self._plc *
self._sense_nplc[channel])
if not samples:
samples = 1
data = list(
map(
lambda i: nidaq.read(devchan='{:s}/ai{:d}'.format(
self._dev, channel),
samples=samples,
freq=self._sample_freq[channel],
config=self._chan_config[channel]),
range(int(self._sense_average[channel]))))
return np.mean(np.trapz(data, dx=1. / (samples - 1)))
def read(self,
channel,
samples=1,
freq=1e4,
minv=-10.0,
maxv=10.0,
timeout=10.0):
"""
Reads analog input values <data> of input channel <channel> with sample frequency <freq>.
Parameters
----------
channel: int
Number of input channel of interest.
samples: int
Number of samples to read up to max_samples.
freq: float
Sample frequency in Hertz.
minv: float
Minimum voltage in Volts.
maxv: float
Maximum voltage in Volts.
timeout: float
Time to wait for completion in seconds.
Returns
-------
data: float/numpy.array/None
Read voltage data in Volts on success or None on error.
"""
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxcreatetask/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471W-01/daqmxcfunc/daqmxcreateaivoltagechan/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxcfgsampclktiming/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxstarttask/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxreadanalogf64/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxreadanalogscalarf64/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxstoptask/
# Corresponding command: http://zone.ni.com/reference/en-XX/help/370471AM-01/daqmxcfunc/daqmxcleartask/
return nidaq.read(devchan='{:s}/ai{:d}'.format(self._dev, channel),
samples=samples,
freq=freq,
minv=minv,
maxv=maxv,
timeout=timeout,
config=self._chan_config[channel])
def read(self,devchan, samples=1, freq=10000.0, minv=-10.0, maxv=10.0, timeout=10.0):
return nidaq.read(devchan, samples=samples, freq=freq, minv=minv, maxv=maxv, timeout=timeout,config=self._chan_config)
def do_get_input(self, channel):
devchan = '%s/%s' % (self._id, channel)
return nidaq.read(devchan, config=self._chan_config)
