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 __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)
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':
def _get_subdevice(self, device):
if self.subdevice is None:
return _comedi.comedi_find_subdevice_by_type(
device, _comedi.COMEDI_SUBD_AI, 0)
return self.subdevice
import comedi as c
import sys, time
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_COUNTER, 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)
params = c.chanlist(1)
params[0] = 0
# configure the encoder
instr = c.comedi_insn_struct()
instr.insn = c.INSN_CONFIG
instr.n = 1
instr.data = params
instr.subdev = 5
# instr.chanspec = c.cr_pack(0,0,c.AREF_OTHER)
instr.chanspec = c.cr_pack(0,0,0)
# comedi_combo_test.py
import comedi as c
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) *****"
