def __init__(self, subdevice = c.COMEDI_SUBD_AI):
self.device = c.comedi_open('/dev/comedi0')
self.subdevice = c.comedi_find_subdevice_by_type(self.device, subdevice, 0)
self.numChannels = c.comedi_get_n_channels(self.device, self.subdevice)
self.numRanges = c.comedi_get_n_channels(self.device, self.subdevice)
self.channelRange = c.comedi_get_range(self.device, self.subdevice, 0, 0)
self.maxdata = c.comedi_get_maxdata(self.device, 0, 0)
def __init__(self, subdevice=c.COMEDI_SUBD_AI):
self.device = c.comedi_open('/dev/comedi0')
self.subdevice = c.comedi_find_subdevice_by_type(
self.device, subdevice, 0)
self.numChannels = c.comedi_get_n_channels(self.device, self.subdevice)
self.numRanges = c.comedi_get_n_channels(self.device, self.subdevice)
self.channelRange = c.comedi_get_range(self.device, self.subdevice, 0,
0)
self.maxdata = c.comedi_get_maxdata(self.device, 0, 0)
def add_channel(self,channel):
if not isinstance(channel,ComediChannel):
raise ValueError("ComediDevice only has ComediChannel.")
VisionEgg.Daq.Device.add_channel(self,channel)
first_channel = channel.constant_parameters.first_channel
num_channels = channel.constant_parameters.num_channels
n_subdevs = comedi.comedi_get_n_subdevices(self.dev)
nchannels = 0
for subdevind in range(n_subdevs):
subdevchans = comedi.comedi_get_n_channels(self.dev, subdevind)
nchannels += subdevchans
if first_channel + num_channels <= nchannels:
subdevice = subdevind
base_channel = first_channel - (nchannels - subdevchans)
if base_channel < 0:
raise RuntimeError("All channels are not in one port. "
"You may need to try another first channel in the configuration file.")
channel_io_dir = channel.constant_parameters.functionality.io_direction
if comedi.comedi_find_subdevice_by_type(self.dev, channel_io_dir, subdevice) != subdevice:
raise RuntimeError("The port is not capable of the functionality as you request.")
for channel in range(base_channel+num_channels):
comedi.comedi_dio_config(self.dev,subdevice,channel,channel_io_dir)
channel.constant_parameters.functionality.device = self.dev
channel.constant_parameters.functionality.subdevice = subdevice
channel.constant_parameters.functionality.write_mask = 2**num_channels - 1
channel.constant_parameters.functionality.base_channel = base_channel
return
raise RuntimeError("Cannot allocate a port as you request.")
def get_dio_channels(path):
device = c.comedi_open(path)
n_subdevices = c.comedi_get_n_subdevices(device)
dio_list = []
for n_subdevice in range(n_subdevices):
if (c.comedi_get_subdevice_type(
device, n_subdevice) == comedi_subdevice_type("dio")):
n_channel = c.comedi_get_n_channels(device, n_subdevice)
#dio_list.extend([DioSocket(path, n_subdevice, chan)
# for chan in range(n_channel)])
return dio_list
def get_dio_channels(path):
device = c.comedi_open(path)
n_subdevices = c.comedi_get_n_subdevices(device)
dio_list = []
for n_subdevice in range(n_subdevices):
if (c.comedi_get_subdevice_type(device, n_subdevice)
== comedi_subdevice_type("dio")):
n_channel = c.comedi_get_n_channels(device, n_subdevice)
#dio_list.extend([DioSocket(path, n_subdevice, chan)
# for chan in range(n_channel)])
return dio_list
print "\tstart: %s" % (cmd_src(cmd.start_src, buf))
print "\tscan_begin: %s" % (cmd_src(cmd.scan_begin_src, buf))
print "\tconvert begin: %s" % (cmd_src(cmd.convert_src, buf))
print "\tscan_end: %s" % (cmd_src(cmd.scan_end_src, buf))
print "\tstop: %s" % (cmd_src(cmd.stop_src, buf))
probe_max_1chan(dev, s)
print "-----subdevice characteristics-----"
for i in range(n_subdevices):
print "subdevice %d:" % (i)
type = c.comedi_get_subdevice_type(dev, i)
print "\ttype: %d (%s)" % (type, subdevice_types[type])
if (type == c.COMEDI_SUBD_UNUSED):
continue
n_chans = c.comedi_get_n_channels(dev, i)
print "\tnumber of channels: %d" % (n_chans)
if not (c.comedi_maxdata_is_chan_specific(dev, i)):
print "\tmax data value: %d" % (c.comedi_get_maxdata(dev, i, 0))
else:
print "max data value is channel specific"
for j in range(n_chans):
print "\tchan: %d: %d" % (j, c.comedi_get_maxdata(dev, i, j))
print "\tranges: "
if not (c.comedi_range_is_chan_specific(dev, i)):
n_ranges = c.comedi_get_n_ranges(dev, i, 0)
print "\t\tall chans:"
for j in range(n_ranges):
rng = c.comedi_get_range(dev, i, 0, j)
print "\t\t[%g,%g]" % (rng.min, rng.max)
else:
import comedi as c
dev = c.comedi_open('/dev/comedi0')
print dev
maxdata = c.comedi_get_maxdata(dev, 0, 0)
print "Max Data: %d" % maxdata
subdev = c.comedi_find_subdevice_by_type(dev, c.COMEDI_SUBD_AO, 0)
print "Subdevice: %d" % subdev
print "Locked? %d" % c.comedi_lock(dev, subdev)
nChannels = c.comedi_get_n_channels(dev, subdev)
print "Num Channels: %d" % nChannels
crange = c.comedi_get_range(dev, 0, 0, 0)
print "Range: %s" % str(crange)
data = maxdata/2
# start with no speed
c.comedi_data_write(dev, subdev, 0, 0, 0, data)
while True:
usrin = raw_input("Enter a char: ")
if usrin is 'q':
break
elif usrin is 'o':
data = data + 10
elif usrin is 'l':
import comedi as c
dev = c.comedi_open('/dev/comedi0')
print dev
maxdata = c.comedi_get_maxdata(dev, 0, 0)
print "Max Data: %d" % maxdata
subdev = c.comedi_find_subdevice_by_type(dev, c.COMEDI_SUBD_AO, 0)
print "Subdevice: %d" % subdev
print "Locked? %d" % c.comedi_lock(dev, subdev)
nChannels = c.comedi_get_n_channels(dev, subdev)
print "Num Channels: %d" % nChannels
crange = c.comedi_get_range(dev, 0, 0, 0)
print "Range: %s" % str(crange)
data = maxdata / 2
# start with no speed
c.comedi_data_write(dev, subdev, 0, 0, 0, data)
while True:
usrin = raw_input("Enter a char: ")
if usrin is 'q':
break
elif usrin is 'o':
data = data + 10
elif usrin is 'l':
else:
print("\tstart: %s" % (cmd_src(cmd.start_src,buf)))
print("\tscan_begin: %s" % (cmd_src(cmd.scan_begin_src,buf)))
print("\tconvert begin: %s" % (cmd_src(cmd.convert_src,buf)))
print("\tscan_end: %s" % (cmd_src(cmd.scan_end_src,buf)))
print("\tstop: %s" % (cmd_src(cmd.stop_src,buf)))
probe_max_1chan(dev,s)
print("-----subdevice characteristics-----")
for i in range(n_subdevices):
print("subdevice %d:" % (i))
type = c.comedi_get_subdevice_type(dev,i)
print("\ttype: %d (%s)" % (type,subdevice_types[type]))
if (type == c.COMEDI_SUBD_UNUSED):
continue
n_chans = c.comedi_get_n_channels(dev,i)
print("\tnumber of channels: %d" % ( n_chans))
if not(c.comedi_maxdata_is_chan_specific(dev,i)):
print("\tmax data value: %d" % (c.comedi_get_maxdata(dev,i,0)))
else:
print("max data value is channel specific")
for j in range(n_chans):
print("\tchan: %d: %d" % (j,c.comedi_get_maxdata(dev,i,j)))
print("\tranges: ")
if not(c.comedi_range_is_chan_specific(dev,i)):
n_ranges = c.comedi_get_n_ranges(dev,i,0)
print("\t\tall chans:")
for j in range(n_ranges):
rng = c.comedi_get_range(dev,i,0,j)
print("\t\t[%g,%g]" % (rng.min, rng.max))
else:
import comedi
import time
com = comedi.comedi_open("/dev/comedi0")
nchan = comedi.comedi_get_n_channels(com, 0)
print "found comedi system with %d channels" % nchan
for i in range(nchan):
comedi.comedi_dio_config(com, 0, i, comedi.COMEDI_OUTPUT)
for i in range(4):
comedi.comedi_dio_bitfield2(com, 0, 1, 1, 0)
time.sleep(1)
comedi.comedi_dio_bitfield2(com, 0, 1, 0, 0)
time.sleep(1)
import time
channel = 0
comediDevice = c.comedi_open('/dev/comedi0')
print comediDevice
print "***** HANDLING INPUT DEVICE(S) *****"
inputSubdev = c.comedi_find_subdevice_by_type(comediDevice, c.COMEDI_SUBD_AI, 0)
print "input subdevice: %d" % inputSubdev
inputMaxdata = c.comedi_get_maxdata(comediDevice, inputSubdev, channel)
print "Input max Data: %d" % inputMaxdata
nInputChannels = c.comedi_get_n_channels(comediDevice, inputSubdev)
print "Num input Channels: %d" % nInputChannels
nInputRanges = c.comedi_get_n_ranges(comediDevice, inputSubdev, channel)
print "number Input Ranges: %d" % nInputRanges
inputRange = c.comedi_get_range(comediDevice, inputSubdev, channel, 0)
print "input range: : %s" % str(inputRange)
print "Input locked? %d" % c.comedi_lock(comediDevice, inputSubdev)
print "***** HANDLING OUTPUT DEVICE(S) *****"
outputSubdev = c.comedi_find_subdevice_by_type(comediDevice, c.COMEDI_SUBD_AO, 0)
print "output subdevice: %d" % outputSubdev