def run(filename):
"""
>>> run(filename='/dev/comedi0') # doctest: +ELLIPSIS, +REPORT_UDIFF
overall info
comedi version: 0.7.76
driver name: ni_pcimio
board name: pci-6052e
number of subdevices: 14
subdevice 0:
type: ai
flags: cmd_read|readable|ground|common|diff|other|dither
...
subdevice 13:
type: counter
flags: readable|writable
number of channels: 1
max data value: 15
ranges: <Range unit:none min:0.0 max:1.0>
command: (not supported)
"""
try:
display_modinfo('comedi')
except ImportError as e:
print('could not load module info (kmod not installed)')
print(' {}'.format(e))
except ModuleNotFound as e:
print('could not load module info (module not found)')
print(' {}'.format(e))
device = _Device(filename=filename)
device.open()
try:
display(device)
finally:
device.close()
def run(filename):
"""
>>> run(filename='/dev/comedi0') # doctest: +ELLIPSIS, +REPORT_UDIFF
overall info
comedi version: 0.7.76
driver name: ni_pcimio
board name: pci-6052e
number of subdevices: 14
subdevice 0:
type: ai
flags: cmd_read|readable|ground|common|diff|other|dither
...
subdevice 13:
type: counter
flags: readable|writable
number of channels: 1
max data value: 15
ranges: <Range unit:none min:0.0 max:1.0>
command: (not supported)
"""
try:
display_modinfo('comedi')
except ImportError as e:
print('could not load module info (kmod not installed)')
print(' {}'.format(e))
except ModuleNotFound as e:
print('could not load module info (module not found)')
print(' {}'.format(e))
device = _Device(filename=filename)
device.open()
try:
display(device)
finally:
device.close()
def setup_device(filename, subdevice, channels, range, aref):
"""Open the Comedi device at filename and setup analog output channels.
"""
device = _Device(filename=filename)
device.open()
if subdevice is None:
ao_subdevice = device.find_subdevice_by_type(
_constant.SUBDEVICE_TYPE.ao, factory=_StreamingSubdevice)
else:
ao_subdevice = device.subdevice(subdevice, factory=_StreamingSubdevice)
ao_channels = [
ao_subdevice.channel(i, factory=_AnalogChannel, range=range, aref=aref)
for i in channels]
return (device, ao_subdevice, ao_channels)
def setup_device(filename, subdevice, channels, range, aref):
"""Open the Comedi device at filename and setup analog output channels.
"""
device = _Device(filename=filename)
device.open()
if subdevice is None:
ao_subdevice = device.find_subdevice_by_type(
_constant.SUBDEVICE_TYPE.ao, factory=_StreamingSubdevice)
else:
ao_subdevice = device.subdevice(subdevice, factory=_StreamingSubdevice)
ao_channels = [
ao_subdevice.channel(i, factory=_AnalogChannel, range=range, aref=aref)
for i in channels]
return (device, ao_subdevice, ao_channels)
def run_aad_thread(): device = _Device(filename='/dev/comedi0') device.open() ai_subdevice, ai_channels = open_ai_channels(device=device, channels=[0]) do_subdevice, do_channels = open_do_channels(device=device, subdevice=None, channels=[0,1,2,3,4,5,6,7]) aich = ai_channels[0] aich.range=aich.find_range(unit=_constant.UNIT.volt,min=-10,max=10) # aich.apply_calibration() # t_aad = threading.Thread(target=aad_thread, args=(aich, do_subdevice)) # t_aad.start() p_aad = multiprocessing.Process(target=aad_thread, args=(aich, do_subdevice)) p_aad.start() pass
def run_aad_thread():
device = _Device(filename='/dev/comedi0')
device.open()
ai_subdevice, ai_channels = open_ai_channels(device=device, channels=[0])
do_subdevice, do_channels = open_do_channels(
device=device, subdevice=None, channels=[0, 1, 2, 3, 4, 5, 6, 7])
aich = ai_channels[0]
aich.range = aich.find_range(unit=_constant.UNIT.volt, min=-10, max=10)
# aich.apply_calibration()
# t_aad = threading.Thread(target=aad_thread, args=(aich, do_subdevice))
# t_aad.start()
p_aad = multiprocessing.Process(target=aad_thread,
args=(aich, do_subdevice))
p_aad.start()
pass
def __init__(self,
dfname="/dev/comedi0",
chunk_size=4096,
n_ao_channels=4,
rate=40000):
self.device = _Device(filename=dfname)
self.device.open()
self.rate = rate
self.n_ao_channels = n_ao_channels
self.ao_channel_list = range(n_ao_channels)
self.chunk_size = chunk_size
self.is_started = False
# configure ao subdevice
ao_subdevice, ao_channels = open_ao_channels(
device=self.device,
subdevice=None,
channels=self.ao_channel_list,
_range=0,
aref=0)
self.ao_subdevice = ao_subdevice
self.ao_channels = ao_channels
self.ao_subdevice.cmd = prepare_ao_command(subdevice=self.ao_subdevice,
channels=self.ao_channels,
frequency=self.rate)
self.ao_dtype = ao_subdevice.get_dtype()
self.ao_subdevice.command()
self.ao_converter = self.ao_channels[0].get_converter()
self.itemsize = np.zeros(1, self.ao_dtype).itemsize
# # configure do subdevice
# n_do_channels = len(do_channel_list)
# do_subdevice,do_channels = open_do_channels(device=device, subdevice=do_subdevice, channels=do_channel_list)
# import ipdb; ipdb.set_trace()
# do_subdevice.cmd = prepare_do_command(subdevice=do_subdevice, channels=do_channels, frequency=fs)
# do_dtype = do_subdevice.get_dtype()
# import ipdb; ipdb.set_trace()
# do_subdevice.command()
self._file = self.ao_subdevice.device.file
# setup buffers
ao_preload0 = np.zeros((self.chunk_size * 5, self.n_ao_channels))
ao_preload = np.zeros((ao_preload0.shape), self.ao_dtype)
for kch in range(n_ao_channels):
ao_preload[:, kch] = self.ao_converter.from_physical(
ao_preload0[:, kch]).astype(self.ao_dtype)
# import ipdb; ipdb.set_trace()
# do_buffer = np.zeros(chunk_size*50, do_dtype)
ao_preload.tofile(self._file)
def run(filename, subdevice, channel, range, aref, num_scans):
"""
>>> t1,data,t2 = run(filename='/dev/comedi0', subdevice=None,
... channel=0, range=0, aref=_constant.AREF.ground, num_scans=10)
>>> t1 # doctest: +SKIP
1332242184.029691
>>> t2 # doctest: +SKIP
1332242184.3311629
>>> data # doctest: +ELLIPSIS
array([...], dtype=uint32)
>>> data.shape
(10,)
"""
_LOG.info(
('measuring device={} subdevice={} channel={} range={} '
'analog-reference={} num-scans={}').format(filename, subdevice,
channel, range, aref,
num_scans))
device = _Device(filename=filename)
device.open()
try:
if subdevice is None:
subdevice = device.find_subdevice_by_type(
_constant.SUBDEVICE_TYPE.ai)
else:
subdevice = device.subdevice(subdevice)
insns = [subdevice.insn(), subdevice.insn(), subdevice.insn()]
insns[0].insn = insns[2].insn = _constant.INSN.gtod
insns[0].data = insns[2].data = [0, 0]
insns[1].insn = _constant.INSN.read
insns[1].data = [0] * num_scans
insns[1].chanspec = _ChanSpec(chan=channel, range=range, aref=aref)
device.do_insnlist(insns)
finally:
device.close()
t1 = insns[0].data[0] + insns[1].data[1] / 1e6
t2 = insns[2].data[0] + insns[2].data[1] / 1e6
return (t1, insns[1].data, t2)
def run(filename, subdevice, channel, range, aref, num_scans):
"""
>>> t1,data,t2 = run(filename='/dev/comedi0', subdevice=None,
... channel=0, range=0, aref=_constant.AREF.ground, num_scans=10)
>>> t1 # doctest: +SKIP
1332242184.029691
>>> t2 # doctest: +SKIP
1332242184.3311629
>>> data # doctest: +ELLIPSIS
array([...], dtype=uint32)
>>> data.shape
(10,)
"""
_LOG.info(
("measuring device={} subdevice={} channel={} range={} " "analog-reference={} num-scans={}").format(
filename, subdevice, channel, range, aref, num_scans
)
)
device = _Device(filename=filename)
device.open()
try:
if subdevice is None:
subdevice = device.find_subdevice_by_type(_constant.SUBDEVICE_TYPE.ai)
else:
subdevice = device.subdevice(subdevice)
insns = [subdevice.insn(), subdevice.insn(), subdevice.insn()]
insns[0].insn = insns[2].insn = _constant.INSN.gtod
insns[0].data = insns[2].data = [0, 0]
insns[1].insn = _constant.INSN.read
insns[1].data = [0] * num_scans
insns[1].chanspec = _ChanSpec(chan=channel, range=range, aref=aref)
device.do_insnlist(insns)
finally:
device.close()
t1 = insns[0].data[0] + insns[1].data[1] / 1e6
t2 = insns[2].data[0] + insns[2].data[1] / 1e6
return (t1, insns[1].data, t2)
def run(filename, **kwargs):
"""
>>> import StringIO
>>> stdout = StringIO.StringIO()
>>> run(filename='/dev/comedi0', stream=stdout)
>>> print(stdout.getvalue()) # doctest: +SKIP
29694
29693
<BLANKLINE>
>>> stdout.truncate(0)
>>> run(filename='/dev/comedi0', reader=_utility.MMapReader, stream=stdout)
>>> print(stdout.getvalue()) # doctest: +SKIP
29691
29691
<BLANKLINE>
"""
device = _Device(filename=filename)
device.open()
try:
read(device=device, **kwargs)
finally:
device.close()
def __init__(self,dfname="/dev/comedi0", chunk_size = 4096, n_ao_channels=4, rate = 40000): self.device = _Device(filename=dfname) self.device.open() self.rate = rate self.n_ao_channels = n_ao_channels self.ao_channel_list = range(n_ao_channels) self.chunk_size = chunk_size self.is_started = False # configure ao subdevice ao_subdevice,ao_channels = open_ao_channels(device=self.device, subdevice=None, channels=self.ao_channel_list, _range=0, aref=0) self.ao_subdevice=ao_subdevice self.ao_channels = ao_channels self.ao_subdevice.cmd = prepare_ao_command(subdevice=self.ao_subdevice, channels=self.ao_channels, frequency=self.rate) self.ao_dtype = ao_subdevice.get_dtype() self.ao_subdevice.command() self.ao_converter = self.ao_channels[0].get_converter() self.itemsize=np.zeros(1,self.ao_dtype).itemsize # # configure do subdevice # n_do_channels = len(do_channel_list) # do_subdevice,do_channels = open_do_channels(device=device, subdevice=do_subdevice, channels=do_channel_list) # import ipdb; ipdb.set_trace() # do_subdevice.cmd = prepare_do_command(subdevice=do_subdevice, channels=do_channels, frequency=fs) # do_dtype = do_subdevice.get_dtype() # import ipdb; ipdb.set_trace() # do_subdevice.command() self._file = self.ao_subdevice.device.file # setup buffers ao_preload0 = np.zeros((self.chunk_size*5,self.n_ao_channels)) ao_preload = np.zeros((ao_preload0.shape), self.ao_dtype) for kch in range(n_ao_channels): ao_preload[:,kch] = self.ao_converter.from_physical(ao_preload0[:,kch]).astype(self.ao_dtype) # import ipdb; ipdb.set_trace() # do_buffer = np.zeros(chunk_size*50, do_dtype) ao_preload.tofile(self._file)
