precisionAccelerometer.h File Reference

Implements accelerometer calibration routines. More...

#include <stdint.h>

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Classes
struct	AccelBuffer
	accelerometer measurement buffer More...
struct	AccelCalibration
	precision accelerometer calibration structure More...

Macros
#define	ACCEL_CAL_AVERAGING_SECS   2
	calibration constants
#define	MAX_ACCEL_CAL_ORIENTATIONS   12
	number of stored precision accelerometer measurements

Functions
void	fInitializeAccelCalibration (AccelCalibration *pthisAccelCal, AccelBuffer *pthisAccelBuffer, volatile int8_t *AccelCalPacketOn)
	Initialize the accelerometer calibration functions.
void	fUpdateAccelBuffer (AccelCalibration *pthisAccelCal, AccelBuffer *pthisAccelBuffer, struct AccelSensor *pthisAccel, volatile int8_t *AccelCalPacketOn)
	Update the buffer used to store samples used for accelerometer calibration.
void	fInvertAccelCal (struct AccelSensor *pthisAccel, AccelCalibration *pthisAccelCal)
	function maps the accelerometer data fGs (g) onto precision calibrated and de-rotated data fGc (g), iGc (counts)
void	fRunAccelCalibration (AccelCalibration *pthisAccelCal, AccelBuffer *pthisAccelBuffer, struct AccelSensor *pthisAccel)
	function runs the precision accelerometer calibration
void	fComputeAccelCalibration4 (AccelBuffer *pthisAccelBuffer, AccelCalibration *pthisAccelCal, struct AccelSensor *pthisAccel)
	calculate the 4 element calibration from the available measurements
void	fComputeAccelCalibration7 (AccelBuffer *pthisAccelBuffer, AccelCalibration *pthisAccelCal, struct AccelSensor *pthisAccel)
	calculate the 7 element calibration from the available measurements
void	fComputeAccelCalibration10 (AccelBuffer *pthisAccelBuffer, AccelCalibration *pthisAccelCal, struct AccelSensor *pthisAccel)
	calculate the 10 element calibration from the available measurements

Detailed Description

Implements accelerometer calibration routines.

Definition in file precisionAccelerometer.h.

Macro Definition Documentation

ACCEL_CAL_AVERAGING_SECS

#define ACCEL_CAL_AVERAGING_SECS   2

calibration constants

calibration measurement averaging period (s)

Definition at line 23 of file precisionAccelerometer.h.

MAX_ACCEL_CAL_ORIENTATIONS

#define MAX_ACCEL_CAL_ORIENTATIONS   12

number of stored precision accelerometer measurements

Definition at line 24 of file precisionAccelerometer.h.

Function Documentation

fComputeAccelCalibration10()

void fComputeAccelCalibration10	(	AccelBuffer *	pthisAccelBuffer,
		AccelCalibration *	pthisAccelCal,
		struct AccelSensor *	pthisAccel
	)

calculate the 10 element calibration from the available measurements

Parameters

pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
pthisAccelCal	Accelerometer calibration parameter structure
pthisAccel	Pointer to the accelerometer input/state structure

Definition at line 424 of file precisionAccelerometer.c.

fComputeAccelCalibration4()

void fComputeAccelCalibration4	(	AccelBuffer *	pthisAccelBuffer,
		AccelCalibration *	pthisAccelCal,
		struct AccelSensor *	pthisAccel
	)

calculate the 4 element calibration from the available measurements

Parameters

pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
pthisAccelCal	Accelerometer calibration parameter structure
pthisAccel	Pointer to the accelerometer input/state structure

Definition at line 215 of file precisionAccelerometer.c.

fComputeAccelCalibration7()

void fComputeAccelCalibration7	(	AccelBuffer *	pthisAccelBuffer,
		AccelCalibration *	pthisAccelCal,
		struct AccelSensor *	pthisAccel
	)

calculate the 7 element calibration from the available measurements

Parameters

pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
pthisAccelCal	Accelerometer calibration parameter structure
pthisAccel	Pointer to the accelerometer input/state structure

Definition at line 330 of file precisionAccelerometer.c.

fInitializeAccelCalibration()

void fInitializeAccelCalibration	(	AccelCalibration *	pthisAccelCal,
		AccelBuffer *	pthisAccelBuffer,
		volatile int8_t *	AccelCalPacketOn
	)

Initialize the accelerometer calibration functions.

Parameters

pthisAccelCal	Accelerometer calibration parameter structure
pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
AccelCalPacketOn	Used to coordinate calibration sample storage and communications

Definition at line 18 of file precisionAccelerometer.c.

fInvertAccelCal()

void fInvertAccelCal	(	struct AccelSensor *	pthisAccel,
		AccelCalibration *	pthisAccelCal
	)

function maps the accelerometer data fGs (g) onto precision calibrated and de-rotated data fGc (g), iGc (counts)

Parameters

pthisAccel	Pointer to the accelerometer input/state structure
pthisAccelCal	Accelerometer calibration parameter structure

Definition at line 118 of file precisionAccelerometer.c.

fRunAccelCalibration()

void fRunAccelCalibration	(	AccelCalibration *	pthisAccelCal,
		AccelBuffer *	pthisAccelBuffer,
		struct AccelSensor *	pthisAccel
	)

function runs the precision accelerometer calibration

Parameters

pthisAccelCal	Accelerometer calibration parameter structure
pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
pthisAccel	Pointer to the accelerometer input/state structure

Definition at line 157 of file precisionAccelerometer.c.

fUpdateAccelBuffer()

void fUpdateAccelBuffer	(	AccelCalibration *	pthisAccelCal,
		AccelBuffer *	pthisAccelBuffer,
		struct AccelSensor *	pthisAccel,
		volatile int8_t *	AccelCalPacketOn
	)

Update the buffer used to store samples used for accelerometer calibration.

Parameters

pthisAccelCal	Accelerometer calibration parameter structure
pthisAccelBuffer	Buffer of measurements used as input to the accel calibration functions
pthisAccel	Pointer to the accelerometer input/state structure
AccelCalPacketOn	Used to coordinate calibration sample storage and communications

Definition at line 66 of file precisionAccelerometer.c.