def cfg_watchdog_ao_expir_states(self, expiration_states):
"""
Configures the expiration states for an analog watchdog timer task.
Args:
expiration_states
(List[nidaqmx.system.watchdog.AOExpirationState]):
Contains the states to which to set analog physical channels
when the watchdog timer expires. Each element of the list
contains an analog physical channel name, the corresponding
expiration state, and the output type for that analog
physical channel. The units of "expiration state" must be
specified in volts for an analog output voltage expiration
state, or amps for an analog output current expiration state.
physical_channel (str): Specifies the analog output channel to
modify. You cannot modify dedicated analog input lines.
expiration_state (float): Specifies the value to set the
channel to upon expiration.
output_type (nidaqmx.constants.WatchdogAOExpirState):
Specifies the output type of the physical channel.
Returns:
List[nidaqmx.system._watchdog_modules.expiration_state.ExpirationState]:
Indicates the list of objects representing the configured
expiration states.
"""
channel_names = flatten_channel_string(
[e.physical_channel for e in expiration_states])
expir_state = numpy.float64(
[e.expiration_state for e in expiration_states])
output_type = numpy.int32(
[e.output_type.value for e in expiration_states])
cfunc = lib_importer.windll.DAQmxCfgWatchdogAOExpirStates
if cfunc.argtypes is None:
with cfunc.arglock:
if cfunc.argtypes is None:
cfunc.argtypes = [
lib_importer.task_handle, ctypes_byte_str,
wrapped_ndpointer(dtype=numpy.float64,
flags=('C', 'W')),
wrapped_ndpointer(dtype=numpy.int32, flags=('C', 'W')),
ctypes.c_uint
]
error_code = cfunc(self._handle, channel_names, expir_state,
output_type, len(expiration_states))
check_for_error(error_code)
return [
ExpirationState(self._handle, e.physical_channel)
for e in expiration_states
]
def cfg_watchdog_do_expir_states(self, expiration_states):
"""
Configures the expiration states for a digital watchdog timer task.
Args:
expiration_states
(List[nidaqmx.system.watchdog.DOExpirationState]):
Contains the states to which to set digital physical channels
when the watchdog timer expires. Each element of the list
contains a digital physical channel name and the corresponding
state for that digital physical channel.
physical_channel (str): Specifies the digital output channel to
modify. You cannot modify dedicated digital input lines.
expiration_state (nidaqmx.constants.Level): Specifies the
value to set the channel to upon expiration.
Returns:
List[nidaqmx.system._watchdog_modules.expiration_state.ExpirationState]:
Indicates the list of objects representing the configured
expiration states.
"""
channel_names = flatten_channel_string(
[e.physical_channel for e in expiration_states])
expir_state = numpy.int32(
[e.expiration_state.value for e in expiration_states])
cfunc = lib_importer.windll.DAQmxCfgWatchdogDOExpirStates
if cfunc.argtypes is None:
with cfunc.arglock:
if cfunc.argtypes is None:
cfunc.argtypes = [
lib_importer.task_handle, ctypes_byte_str,
wrapped_ndpointer(dtype=numpy.int32, flags=('C', 'W')),
ctypes.c_uint
]
error_code = cfunc(self._handle, channel_names, expir_state,
len(expiration_states))
check_for_error(error_code)
return [
ExpirationState(self._handle, e.physical_channel)
for e in expiration_states
]
def __getitem__(self, index):
"""
Indexes an expiration state on this collection.
Args:
index (str): Name of the physical channel of which the
expiration state to retrieve.
Returns:
nidaqmx.system._watchdog_modules.expiration_state.ExpirationState:
The object representing the indexed expiration state.
"""
if isinstance(index, six.string_types):
return ExpirationState(self._handle, index)
else:
raise DaqError(
'Invalid index type "{0}" used to access expiration states.'.
format(type(index)), -1)
