def do_get_output(self, channel, output_range=0):
raw_data = comedi_lib.data_read(self._id, 1, channel, output_range, 0)
data = comedi_lib.convert_to_phys(
self._id, 1, channel,
raw_data,
# self._default_output_range,
output_range,
self._output_maxdata)
return float(data)
def do_get_output(self, channel, output_range=0):
raw_data = comedi_lib.data_read(self._id, 1, channel, output_range, 0)
data = comedi_lib.convert_to_phys(
self._id,
1,
channel,
raw_data,
# self._default_output_range,
output_range,
self._output_maxdata)
return float(data)
def do_get_input(self, channel, samples=1, averaged=False,
sample_rate=8e3,
input_range=0):
'''Get the value of the analog input
Input:
channel
samples : number of samples
averaged : True or False
sample_rate : Samples / second
input_range : 0 [-4.096 V, 4.096 V]
1 [-2.048 V, 2.048 V]
2 [ 0.0 V, 4.096 V]
3 [ 0.0 V, 2.048 V]
Output:
data (numpy float32 array)
'''
if samples == 1:
raw_data = comedi_lib.data_read(self._id,
0, channel,
input_range,
0)
data = comedi_lib.convert_to_phys(raw_data,
self._default_input_range,
self._default_input_maxdata)
return data
elif samples > 1:
# data = comedi_lib.data_read_n(self._id,
# 0, channel, 0, 0,
# samples)
if sample_rate > 2e3:
# The daq needs 0.5 ms to set up, which messes up the first
# samples in fast measurements.
offset = 2
else:
offset = 0
data = comedi_lib.data_read_n_async(self._id,
0,
channel,
input_range,
0,
samples + offset,
sample_rate)
if averaged:
return average(data[offset:])
else:
return data[offset:]
else:
logging.warning('Invalid number of samples requested')
return False
def do_get_input(self, channel, samples=1, averaged=False,
sample_rate=8e3,
input_range=0):
'''Get the value of the analog input
Input:
channel
samples : number of samples
averaged : True or False
sample_rate : Samples / second
input_range :
Output:
data (numpy float32 array)
'''
input_maxdata = comedi_lib.get_max_data(self._id,
0,
channel)
if samples == 1:
raw_data = comedi_lib.data_read(self._id,
0, channel,
input_range,
0)
data = comedi_lib.convert_to_phys(
self._id, 0, channel,
raw_data,
# self._default_input_range,
input_range,
input_maxdata)
return data
elif samples > 1:
data = comedi_lib.data_read_n_async(self._id,
0,
channel,
input_range,
0,
samples,
sample_rate)
if averaged:
return average(data)
else:
return data
else:
logging.warning('Invalid number of samples requested')
return False
def do_get_input(self,
channel,
samples=1,
averaged=False,
sample_rate=8e3,
input_range=0):
'''Get the value of the analog input
Input:
channel
samples : number of samples
averaged : True or False
sample_rate : Samples / second
input_range :
Output:
data (numpy float32 array)
'''
input_maxdata = comedi_lib.get_max_data(self._id, 0, channel)
if samples == 1:
raw_data = comedi_lib.data_read(self._id, 0, channel, input_range,
0)
data = comedi_lib.convert_to_phys(
self._id,
0,
channel,
raw_data,
# self._default_input_range,
input_range,
input_maxdata)
return data
elif samples > 1:
data = comedi_lib.data_read_n_async(self._id, 0, channel,
input_range, 0, samples,
sample_rate)
if averaged:
return average(data)
else:
return data
else:
logging.warning('Invalid number of samples requested')
return False
def do_get_output_unipolar(self, channel):
raw_data = comedi_lib.data_read(self._id, 1, channel, 1, 0)
data = comedi_lib.convert_to_phys(raw_data,
self._unipolar_output_range,
self._default_output_maxdata)
return float(data)