def set_sample_delay(self, data_source, delay=None, differential=False):
"""
Change the delay between samples using the onboard time processor
module to change the effective sampling rate of a specific data source.
:param data_source: A data source from sensor.SensorFusion
:param delay: The delay in ms between samples,
or None to reset to default
:param differential: Set Time Preprocessor mode to differential,
instead of the default, absolute
"""
if self._data_source_signals[data_source] is None:
log.debug("Getting data signal for data source {0}".format(
data_source
))
self._data_source_signals[data_source] = \
libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source
)
if delay is not None:
mode = TimeMode.DIFFERENTIAL if differential else \
TimeMode.ABSOLUTE
log.debug("Creating time dataprocessor for signal {0}".format(
self._data_source_signals[data_source]
))
_done = Event()
def _processor_set(context, processor):
"""
Set global variables as the libmetawear callback can't handle the self
parameter of instance methods.
:param context: Pointer to additional data for the callback function
:param processor: The processor that was created
"""
self._data_source_signals[data_source] = processor
_done.set()
processor_set_func = FnVoid_VoidP_VoidP(_processor_set)
libmetawear.mbl_mw_dataprocessor_time_create(
self._data_source_signals[data_source],
mode,
delay,
None,
processor_set_func)
_done.wait(timeout=PROCESSOR_SET_WAIT_TIME)
if self._data_source_signals[data_source] is None:
raise PyMetaWearException("Can't set data processor!")
else:
data_signal = libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source)
if self._data_source_signals[data_source] != data_signal:
libmetawear.mbl_mw_dataprocessor_remove(
self._data_source_signals[data_source]
)
self._data_source_signals[data_source] = data_signal
def set_sample_delay(self, data_source, delay=None, differential=False):
"""
Change the delay between samples using the onboard time processor
module to change the effective sampling rate of a specific data source.
:param data_source: A data source from sensor.SensorFusion
:param delay: The delay in ms between samples,
or None to reset to default
:param differential: Set Time Preprocessor mode to differential,
instead of the default, absolute
"""
global current_processor
global waiting_for_processor
if self._data_source_signals[data_source] is None:
log.debug("Getting data signal for data source {0}".format(
data_source
))
self._data_source_signals[data_source] = \
libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source
)
if delay is not None:
mode = processor.Time.MODE_DIFFERENTIAL if differential else \
processor.Time.MODE_ABSOLUTE
waiting_for_processor = True
log.debug("Creating time dataprocessor for signal {0}".format(
self._data_source_signals[data_source]
))
libmetawear.mbl_mw_dataprocessor_time_create(
self._data_source_signals[data_source],
mode,
delay,
Fn_VoidPtr(processor_set))
wait_time = 0
while waiting_for_processor and wait_time < max_processor_wait_time:
sleeptime = 0.1
time.sleep(sleeptime)
wait_time += sleeptime
if current_processor is not None:
self._data_source_signals[data_source] = current_processor
current_processor = None
else:
raise PyMetaWearException("Can't set data processor!")
else:
data_signal = libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source)
if self._data_source_signals[data_source] != data_signal:
libmetawear.mbl_mw_dataprocessor_remove(
self._data_source_signals[data_source]
)
self._data_source_signals[data_source] = data_signal
def set_sample_delay(self, data_source, delay=None, differential=False):
"""
Change the delay between samples using the onboard time processor
module to change the effective sampling rate of a specific data source.
:param data_source: A data source from sensor.SensorFusion
:param delay: The delay in ms between samples,
or None to reset to default
:param differential: Set Time Preprocessor mode to differential,
instead of the default, absolute
"""
if self._data_source_signals[data_source] is None:
log.debug("Getting data signal for data source {0}".format(
data_source
))
self._data_source_signals[data_source] = \
libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source
)
if delay is not None:
mode = TimeMode.DIFFERENTIAL if differential else \
TimeMode.ABSOLUTE
log.debug("Creating time dataprocessor for signal {0}".format(
self._data_source_signals[data_source]
))
_done = Event()
def _processor_set(processor):
"""
Set global variables as the libmetawear callback can't handle the self
parameter of instance methods.
:param processor: The processor that was created
"""
self._data_source_signals[data_source] = processor
_done.set()
libmetawear.mbl_mw_dataprocessor_time_create(
self._data_source_signals[data_source],
mode,
delay,
FnVoid_VoidP(_processor_set))
_done.wait(timeout=PROCESSOR_SET_WAIT_TIME)
if self._data_source_signals[data_source] is None:
raise PyMetaWearException("Can't set data processor!")
else:
data_signal = libmetawear.mbl_mw_sensor_fusion_get_data_signal(
self.board, data_source)
if self._data_source_signals[data_source] != data_signal:
libmetawear.mbl_mw_dataprocessor_remove(
self._data_source_signals[data_source]
)
self._data_source_signals[data_source] = data_signal