meteo_stick_calib.c File Reference

Parser for calibration data coming from 25AA256 EEPROM of the Meteo Stick. More...

#include "modules/meteo/meteo_stick_calib.h"
#include <math.h>

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Data Structures
struct	CalibrationPoint

Functions
static bool	mtostk_populate_sensor_from_buffer (Sensors_params *sp, uint32_t **eeprom_buffer)
static bool	mtostk_populate_float_array_from_buffer (float *ar, uint16_t *num_of_array, uint16_t *num_of_elem, uint32_t **eeprom_buffer)
static bool	mtostk_populate_uuid_from_buffer (char *str, uint32_t **eeprom_buffer)
static bool	mtostk_populate_uint_from_buffer (uint32_t *sca, uint32_t **eeprom_buffer)
static bool	mtostk_seek_array_buffer (size_t dataSize, uint32_t **eeprom_buffer)
static bool	mtostk_seek_scalar_buffer (size_t dataSize, uint32_t **eeprom_buffer)
static uint32_t	fletcher32 (uint32_t const *_data, size_t words)
static float	mtostk_apply_polynomial (float *coeffs, uint16_t num_coef, float value)
static float	mtostk_apply_polynomial_temp (Sensors_params *params, float temp, float value)
bool	mtostk_populate_cal_from_buffer (Calibration_params *cp, uint8_t *_eeprom_buffer)
	Initializes a Calibration_params structure from memory buffer.
float	mtostk_get_calibrated_value (Calibration_params *cp, Mtostk_sensors type, float uncal, float temp)
	get calibrated value for a sensor according to current temperature

Detailed Description

Parser for calibration data coming from 25AA256 EEPROM of the Meteo Stick.

Definition in file meteo_stick_calib.c.

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Data Structure Documentation

CalibrationPoint

struct CalibrationPoint

Definition at line 33 of file meteo_stick_calib.c.

Data Fields
float	rawValue
float	ref
float	value

Function Documentation

fletcher32()

static uint32_t fletcher32 ( uint32_t const *  _data, size_t  words  )

static

Definition at line 233 of file meteo_stick_calib.c.

References foo, and words.

Referenced by mtostk_populate_sensor_from_buffer().

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mtostk_apply_polynomial()

float mtostk_apply_polynomial ( float *  coeffs, uint16_t  num_coef, float  value  )

static

Definition at line 255 of file meteo_stick_calib.c.

References foo.

Referenced by mtostk_apply_polynomial_temp(), and mtostk_get_calibrated_value().

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mtostk_apply_polynomial_temp()

float mtostk_apply_polynomial_temp ( Sensors_params *  params, float  temp, float  value  )

static

Definition at line 265 of file meteo_stick_calib.c.

References alpha, Sensors_params::coeffs, foo, mtostk_apply_polynomial(), Sensors_params::num_coeff, Sensors_params::num_temp, t1, Sensors_params::temps, Sensors_params::timestamp, v1, and v2.

Referenced by mtostk_get_calibrated_value().

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mtostk_get_calibrated_value()

float mtostk_get_calibrated_value	(	Calibration_params *	cp,
		Mtostk_sensors	type,
		float	uncal,
		float	temp
	)

get calibrated value for a sensor according to current temperature

Parameters

[in]	cp	pointer to calibration structure
[in]	type	sensor type
[in]	uncal	uncalibrated value
[in]	temp	current temperature (not relevant for calibration of temperature sensor)

Returns

calibrated value

Definition at line 71 of file meteo_stick_calib.c.

References Sensors_params::coeffs, foo, mtostk_apply_polynomial(), mtostk_apply_polynomial_temp(), MTOSTK_NUM_SENSORS, MTOSTK_TEMP, Sensors_params::num_coeff, Sensors_params::num_temp, and Sensors_params::timestamp.

Referenced by get_diff(), get_humidity(), get_pressure(), and get_temp().

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mtostk_populate_cal_from_buffer()

bool mtostk_populate_cal_from_buffer	(	Calibration_params *	cp,
		uint8_t *	eeprom_buffer
	)

Initializes a Calibration_params structure from memory buffer.

Precondition

the memory buffer must be initialized with data read from the spi eeprom embeded on the meteostick

Parameters

[out]	cp	pointer to the Calibration_params structure to be initialized
[in]	eeprom_buffer	pointer to word aligned buffer of bytes

Definition at line 53 of file meteo_stick_calib.c.

References foo, MTOSTK_NUM_SENSORS, mtostk_populate_sensor_from_buffer(), mtostk_populate_uuid_from_buffer(), and MTOSTK_TEMP.

Referenced by meteo_stick_periodic().

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mtostk_populate_float_array_from_buffer()

static bool mtostk_populate_float_array_from_buffer ( float *  ar, uint16_t *  num_of_array, uint16_t *  num_of_elem, uint32_t **  eeprom_buffer  )

static

Definition at line 123 of file meteo_stick_calib.c.

References foo, idx, MTOSTK_MAX_POLY_ARRAY_SIZE, and MTOSTK_MAX_TEMP_ARRAY_SIZE.

Referenced by mtostk_populate_sensor_from_buffer().

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mtostk_populate_sensor_from_buffer()

static bool mtostk_populate_sensor_from_buffer ( Sensors_params *  sp, uint32_t **  eeprom_buffer  )

static

Definition at line 89 of file meteo_stick_calib.c.

References Sensors_params::coeffs, fletcher32(), foo, mtostk_populate_float_array_from_buffer(), mtostk_populate_uint_from_buffer(), mtostk_seek_array_buffer(), mtostk_seek_scalar_buffer(), Sensors_params::num_coeff, Sensors_params::num_temp, Sensors_params::temps, and Sensors_params::timestamp.

Referenced by mtostk_populate_cal_from_buffer().

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mtostk_populate_uint_from_buffer()

static bool mtostk_populate_uint_from_buffer ( uint32_t *  sca, uint32_t **  eeprom_buffer  )

static

Definition at line 113 of file meteo_stick_calib.c.

References foo.

Referenced by mtostk_populate_sensor_from_buffer().

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mtostk_populate_uuid_from_buffer()

static bool mtostk_populate_uuid_from_buffer ( char *  str, uint32_t **  eeprom_buffer  )

static

Definition at line 176 of file meteo_stick_calib.c.

References foo, idx, and UUID_LEN.

Referenced by mtostk_populate_cal_from_buffer().

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mtostk_seek_array_buffer()

static bool mtostk_seek_array_buffer ( size_t  dataSize, uint32_t **  eeprom_buffer  )

static

Definition at line 200 of file meteo_stick_calib.c.

References foo, MTOSTK_MAX_SEEK_ARRAY_SIZE, and MTOSTK_MAX_TEMP_ARRAY_SIZE.

Referenced by mtostk_populate_sensor_from_buffer().

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mtostk_seek_scalar_buffer()

static bool mtostk_seek_scalar_buffer ( size_t  dataSize, uint32_t **  eeprom_buffer  )

static

Definition at line 225 of file meteo_stick_calib.c.

References foo.

Referenced by mtostk_populate_sensor_from_buffer().

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