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/*
* Copyright (C) 2014 PHYTEC Messtechnik GmbH
* 2017 HAW Hamburg
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup drivers_mag3110 MAG3110 3-Axis Digital Magnetometer
* @ingroup drivers_sensors
* @brief Driver for the Freescale MAG3110 magnetometer.
* After initialization and set activ the magnetometer
* will make measurements at periodic times.
* The output rate and over sample ratio
* can be determined by magnetometer initialization.
* The measured values of magnetic field strength and
* die temperature have uncalibrated offsets.
* To get correct measurement values, the individual
* offsets must be measured and set accordingly.
*
* @{
*
* @file
* @brief Interface definition for the MAG3110 magnetometer driver.
*
* @author Johann Fischer <j.fischer@phytec.de>
* @author Sebastian Meiling <s@mlng.net>
*/
#ifndef MAG3110_H
#define MAG3110_H
#include <stdint.h>
#include <stdbool.h>
#include "periph/i2c.h"
#ifdef __cplusplus
extern "C"
{
#endif
/**
* @brief Named return values
*/
enum {
MAG3110_OK, /**< all good */
MAG3110_ERROR_I2C, /**< I2C communication failed */
MAG3110_ERROR_DEV, /**< Device MAG3110 not found */
MAG3110_ERROR_CNF, /**< Device configuration failed */
};
#ifndef MAG3110_I2C_ADDRESS
#define MAG3110_I2C_ADDRESS 0x0E /**< Magnetometer Default Address */
#endif
/**
* @name Output data rate macros
* @{
*/
#define MAG3110_DROS_8000_16 0 /**< Output Rate 80 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_4000_32 1 /**< Output Rate 40 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_2000_64 2 /**< Output Rate 20 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_1000_128 3 /**< Output Rate 10 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_4000_16 4 /**< Output Rate 40 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_2000_32 5 /**< Output Rate 20 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_1000_64 6 /**< Output Rate 10 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0500_128 7 /**< Output Rate 5 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_2000_16 8 /**< Output Rate 20 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_1000_32 9 /**< Output Rate 10 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0500_64 10 /**< Output Rate 5 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0250_128 11 /**< Output Rate 2.5 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_1000_16 12 /**< Output Rate 10 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_0500_32 13 /**< Output Rate 5 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0250_64 14 /**< Output Rate 2.5 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0125_128 15 /**< Output Rate 1.25 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_0500_16 16 /**< Output Rate 5 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_0250_32 17 /**< Output Rate 2.5 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0125_64 18 /**< Output Rate 1.25 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0063_128 19 /**< Output Rate 0.63 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_0250_16 20 /**< Output Rate 2.5 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_0125_32 21 /**< Output Rate 1.25 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0063_64 22 /**< Output Rate 0.63 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0031_128 23 /**< Output Rate 0.31 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_0125_16 24 /**< Output Rate 1.25 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_0063_32 25 /**< Output Rate 0.63 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0031_64 26 /**< Output Rate 0.31 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0016_128 27 /**< Output Rate 0.16 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_0063_16 28 /**< Output Rate 0.63 Hz, Over Sample Ratio 16 */
#define MAG3110_DROS_0031_32 29 /**< Output Rate 0.31 Hz, Over Sample Ratio 32 */
#define MAG3110_DROS_0016_64 30 /**< Output Rate 0.16 Hz, Over Sample Ratio 64 */
#define MAG3110_DROS_0008_128 31 /**< Output Rate 0.08 Hz, Over Sample Ratio 128 */
#define MAG3110_DROS_DEFAULT MAG3110_DROS_0125_128 /**< Default Setting for testing */
/** @} */
/**
* @brief Configuration parameters
*/
typedef struct {
i2c_t i2c; /**< I2C bus the device is connected to */
uint8_t addr; /**< I2C bus address of the device */
uint8_t type; /**< device type */
uint8_t dros; /**< sampling rate to use */
int16_t offset[3]; /**< data offset in X, Y, and Z direction */
} mag3110_params_t;
/**
* @brief Device descriptor for MAG3110 magnetometer.
*/
typedef struct {
mag3110_params_t params; /**< device configuration parameters */
} mag3110_t;
/**
* @brief Data type for the result data
*/
typedef struct {
int16_t x; /**< acceleration in X direction */
int16_t y; /**< acceleration in Y direction */
int16_t z; /**< acceleration in Z direction */
} mag3110_data_t;
/**
* @brief Initialise the MAG3110 magnetometer driver.
*
* @param[out] dev device descriptor of magnetometer to initialize
* @param[in] params configuration parameters
*
* @return 0 on success
* @return -1 if I2C communication failed
* @return -2 if magnetometer test failed
* @return -3 if magnetometer configuration failed
*/
int mag3110_init(mag3110_t *dev, const mag3110_params_t *params);
/**
* @brief Set user offset correction.
*
* Offset correction register will be erased after accelerometer reset.
*
* @param[out] dev device descriptor of magnetometer
* @param[in] x offset offset correction value for x-axis
* @param[in] y offset offset correction value for y-axis
* @param[in] z offset offset correction value for z-axis
*
* @return 0 on success
* @return -1 on error
*/
int mag3110_set_user_offset(const mag3110_t *dev, int16_t x, int16_t y, int16_t z);
/**
* @brief Set active mode, this enables periodic measurements.
*
* @param[out] dev device descriptor of magnetometer
*
* @return 0 on success
* @return -1 on error
*/
int mag3110_set_active(const mag3110_t *dev);
/**
* @brief Set standby mode.
*
* @param[in] dev device descriptor of magnetometer
*
* @return 0 on success
* @return -1 on error
*/
int mag3110_set_standby(const mag3110_t *dev);
/**
* @brief Check for new set of measurement data.
*
* @param[in] dev device descriptor of magnetometer
*
* @return >0 if x-, y- and z-axis new sample is ready
* @return 0 if measurement is in progress
* @return -1 on error
*/
int mag3110_is_ready(const mag3110_t *dev);
/**
* @brief Read magnetometer's data.
*
* To get the actual values for the magnetic field in \f$\mu T\f$,
* one have to divide the returned values from the magnetometer by 10.
*
* @param[in] dev device descriptor of accelerometer
* @param[out] data the current magnetic field strength
*
* @return 0 on success
* @return -1 on error
*/
int mag3110_read(const mag3110_t *dev, mag3110_data_t *data);
/**
* @brief Read die temperature.
*
* @param[in] dev device descriptor of magnetometer
* @param[out] dtemp die temperature
*
* @return 0 on success
* @return -1 on error
*/
int mag3110_read_dtemp(const mag3110_t *dev, int8_t *dtemp);
#ifdef __cplusplus
}
#endif
#endif /* MAG3110_H */
/** @} */
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