delta.h File Reference

Only allows data through that is a min distance from a reference value. More...

#include "processor_common.h"

Go to the source code of this file.

Enumerations
enum	MblMwDeltaMode { MBL_MW_DELTA_MODE_ABSOLUTE = 0 , MBL_MW_DELTA_MODE_DIFFERENTIAL , MBL_MW_DELTA_MODE_BINARY }
	Output modes of the data processor. More...

Functions
METAWEAR_API int32_t	mbl_mw_dataprocessor_delta_create (MblMwDataSignal *source, MblMwDeltaMode mode, float magnitude, void *context, MblMwFnDataProcessor processor_created)
	Create a delta processor which looks for changes in the input. More...
METAWEAR_API int32_t	mbl_mw_dataprocessor_delta_set_reference (MblMwDataProcessor *delta, float previous_value)
	Sets the reference value of the processor. More...
METAWEAR_API int32_t	mbl_mw_dataprocessor_delta_modify_magnitude (MblMwDataProcessor *delta, float magnitude)
	Modifies the magnitude that allows data through. More...

Detailed Description

Only allows data through that is a min distance from a reference value.

Copyright

MbientLab License

Enumeration Type Documentation

MblMwDeltaMode

enum MblMwDeltaMode

Output modes of the data processor.

Enumerator
MBL_MW_DELTA_MODE_ABSOLUTE	Return the data as is.
MBL_MW_DELTA_MODE_DIFFERENTIAL	Return the difference between the input and the reference value.
MBL_MW_DELTA_MODE_BINARY	Return 1 if input > reference, -1 if input < reference.

Function Documentation

mbl_mw_dataprocessor_delta_create()

METAWEAR_API int32_t mbl_mw_dataprocessor_delta_create	(	MblMwDataSignal *	source,
		MblMwDeltaMode	mode,
		float	magnitude,
		void *	context,
		MblMwFnDataProcessor	processor_created
	)

Create a delta processor which looks for changes in the input.

Only allows data through that is a min distance from a reference value. A pointer representing the processor will be passed back to the user via a callback function.

Parameters

source	Data signal providing the input for the processor
mode	Output mode of the processor
magnitude	Min distance from the reference value to allow the input to pass
context	Pointer to additional data for the callback function
processor_created	Callback function to be executed when the processor is created

mbl_mw_dataprocessor_delta_modify_magnitude()

METAWEAR_API int32_t mbl_mw_dataprocessor_delta_modify_magnitude	(	MblMwDataProcessor *	delta,
		float	magnitude
	)

Modifies the magnitude that allows data through.

Parameters

delta	Delta processor to modify
magnitude	Min distance from the reference value to allow the input to pass

Returns

MBL_MW_STATUS_OK if processor configuration was updated, MBL_MW_STATUS_WARNING_INVALID_PROCESSOR_TYPE if a non-delta processor was passed in

mbl_mw_dataprocessor_delta_set_reference()

METAWEAR_API int32_t mbl_mw_dataprocessor_delta_set_reference	(	MblMwDataProcessor *	delta,
		float	previous_value
	)

Sets the reference value of the processor.

Parameters

delta	Delta processor to modify
previous_value	Min distance from the reference value to allow the input to pass

Returns

MBL_MW_STATUS_OK if processor state was updated, MBL_MW_STATUS_WARNING_INVALID_PROCESSOR_TYPE if a non-delta processor was passed in