ak8975.h File Reference

Driver for the AKM AK8975 magnetometer. More...

#include "std.h"
#include "mcu_periph/i2c.h"
#include "math/pprz_algebra_int.h"

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Data Structures
struct	Ak8975
union	Ak8975.data

Macros
#define	AK8975_I2C_SLV_ADDR   (0x0C<<1)
#define	AK8975_REG_ST1_ADDR   0x02
#define	AK8975_REG_CNTL_ADDR   0x0A
#define	AK8975_REG_ASASX   0x10
#define	AK8975_MODE_FUSE_ACCESS   0b00001111
#define	AK8975_MODE_POWER_DOWN   0b00000000
#define	AK8975_MODE_SINGLE_MEAS   0b00000001

Enumerations
enum	Ak8975ConfStatus { AK_CONF_UNINIT , AK_REQ_CALIBRATION , AK_DISABLE_ACCESS_CALIBRATION , AK_CONF_REQUESTED }
	config status states More...
enum	Ak8975Status { AK_STATUS_IDLE , AK_STATUS_MEAS , AK_STATUS_READ , AK_STATUS_DONE }
	Normal status states. More...

Functions
void	ak8975_init (struct Ak8975 *ak, struct i2c_periph *i2c_p, uint8_t addr)
void	ak8975_configure (struct Ak8975 *ak)
void	ak8975_event (struct Ak8975 *ak)
void	ak8975_read (struct Ak8975 *ak)
static void	ak8975_periodic (struct Ak8975 *ak)
	convenience function: read or start configuration if not already initialized More...

Detailed Description

Driver for the AKM AK8975 magnetometer.

Definition in file ak8975.h.

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Data Structure Documentation

Ak8975

struct Ak8975

Definition at line 59 of file ak8975.h.

Collaboration diagram for Ak8975:

Data Fields
union Ak8975	data
volatile bool	data_available	data ready flag
struct i2c_periph *	i2c_p	peripheral used for communcation
struct i2c_transaction	i2c_trans	i2c transaction used for communication with the ak8936
enum Ak8975ConfStatus	init_status	init status
bool	initialized	config done flag
uint32_t	last_meas_time	last measurement time in ms
enum Ak8975Status	status	main status

Ak8975.data

union Ak8975.data

Definition at line 69 of file ak8975.h.

Data Fields
int16_t	value[3]	data values accessible by channel index
struct Int16Vect3	vect	data vector in mag coordinate system

Macro Definition Documentation

AK8975_I2C_SLV_ADDR

#define AK8975_I2C_SLV_ADDR   (0x0C<<1)

Definition at line 35 of file ak8975.h.

AK8975_MODE_FUSE_ACCESS

#define AK8975_MODE_FUSE_ACCESS   0b00001111

Definition at line 39 of file ak8975.h.

AK8975_MODE_POWER_DOWN

#define AK8975_MODE_POWER_DOWN   0b00000000

Definition at line 40 of file ak8975.h.

AK8975_MODE_SINGLE_MEAS

#define AK8975_MODE_SINGLE_MEAS   0b00000001

Definition at line 41 of file ak8975.h.

AK8975_REG_ASASX

#define AK8975_REG_ASASX   0x10

Definition at line 38 of file ak8975.h.

AK8975_REG_CNTL_ADDR

#define AK8975_REG_CNTL_ADDR   0x0A

Definition at line 37 of file ak8975.h.

AK8975_REG_ST1_ADDR

#define AK8975_REG_ST1_ADDR   0x02

Definition at line 36 of file ak8975.h.

Enumeration Type Documentation

Ak8975ConfStatus

enum Ak8975ConfStatus

config status states

Enumerator
AK_CONF_UNINIT
AK_REQ_CALIBRATION
AK_DISABLE_ACCESS_CALIBRATION
AK_CONF_REQUESTED

Definition at line 44 of file ak8975.h.

Ak8975Status

enum Ak8975Status

Normal status states.

Enumerator
AK_STATUS_IDLE
AK_STATUS_MEAS
AK_STATUS_READ
AK_STATUS_DONE

Definition at line 52 of file ak8975.h.

Function Documentation

ak8975_configure()

void ak8975_configure

(

struct Ak8975 *

ak

)

Definition at line 63 of file ak8975.c.

References AK8975_MODE_FUSE_ACCESS, AK8975_MODE_POWER_DOWN, AK8975_REG_ASASX, AK8975_REG_CNTL_ADDR, AK_CONF_REQUESTED, AK_CONF_UNINIT, AK_DISABLE_ACCESS_CALIBRATION, AK_REQ_CALIBRATION, i2c_transaction::buf, calibration_values, Ak8975::i2c_p, Ak8975::i2c_trans, i2c_transceive(), i2c_transmit(), I2CTransDone, I2CTransFailed, I2CTransSuccess, Ak8975::init_status, Ak8975::initialized, i2c_transaction::slave_addr, and i2c_transaction::status.

Referenced by ak8975_periodic().

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ak8975_event()

void ak8975_event

(

struct Ak8975 *

ak

)

Definition at line 131 of file ak8975.c.

References AK8975_MEAS_TIME_MS, AK8975_REG_ST1_ADDR, AK_STATUS_IDLE, AK_STATUS_MEAS, AK_STATUS_READ, i2c_transaction::buf, Ak8975::data, Ak8975::data_available, get_sys_time_msec(), Ak8975::i2c_p, Ak8975::i2c_trans, i2c_transceive(), I2CTransDone, I2CTransFailed, I2CTransSuccess, Ak8975::initialized, Int16FromRaw, Ak8975::last_meas_time, RawFromBuf, i2c_transaction::slave_addr, i2c_transaction::status, Ak8975::status, and val.

Referenced by imu_apogee_event().

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ak8975_init()

void ak8975_init	(	struct Ak8975 *	ak,
		struct i2c_periph *	i2c_p,
		uint8_t	addr
	)

Definition at line 47 of file ak8975.c.

References AK_CONF_UNINIT, AK_STATUS_IDLE, Ak8975::data_available, Ak8975::i2c_p, Ak8975::i2c_trans, I2CTransDone, Ak8975::init_status, Ak8975::initialized, i2c_transaction::slave_addr, i2c_transaction::status, and Ak8975::status.

Referenced by imu_apogee_init().

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ak8975_periodic()

static void ak8975_periodic ( struct Ak8975 *  ak )

inlinestatic

convenience function: read or start configuration if not already initialized

Definition at line 83 of file ak8975.h.

References ak8975_configure(), ak8975_read(), and Ak8975::initialized.

Referenced by imu_apogee_periodic().

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ak8975_read()

void ak8975_read

(

struct Ak8975 *

ak

)

Definition at line 113 of file ak8975.c.

References AK8975_MODE_SINGLE_MEAS, AK8975_REG_CNTL_ADDR, AK_STATUS_IDLE, AK_STATUS_MEAS, i2c_transaction::buf, get_sys_time_msec(), Ak8975::i2c_p, Ak8975::i2c_trans, i2c_transmit(), Ak8975::last_meas_time, i2c_transaction::slave_addr, and Ak8975::status.

Referenced by ak8975_periodic().

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