Qmc5883l Class Reference

QMC5883L Compass Driver for XRCU. More...

#include <Qmc5883l.h>

Inheritance diagram for Qmc5883l:

Public Member Functions
	Qmc5883l (const uint32_t init_port)
	Creates a new Qmc5883l object.
bool	begin (const uint8_t init_i2c_address=DEFAULT_I2C_ADDRESS)
	Configures the settings of the I2C bus and the QMC5883L magnetometer.
bool	begin (const Compass_cal_vals_t compass_cal_values, const uint8_t init_i2c_address=DEFAULT_I2C_ADDRESS)
	Configures the settings of the I2C bus and the QMC5883L magnetometer.
bool	reset ()
	Software-resets the QMC5883L.
bool	update ()
	Fetches and updates new data from the compass.
int16_t	get_raw_temp ()
	Gets the raw temperature reading.
uint8_t	id ()
	Reads the identification register.
bool	is_mag_present ()
	Checks for the presence of the HMC5883L magnetometer on the I2C bus.
Public Member Functions inherited from General_compass
int16_t	get_raw_x ()
	Gets the magnetic field strength in X-axis in raw value.
int16_t	get_raw_y ()
	Gets the magnetic field strength in Y-axis in raw value.
int16_t	get_raw_z ()
	Gets the magnetic field strength in Z-axis in raw value.
Mag_field_raw_t	get_raw_mag ()
	Gets a package of magnetic field strengths in 3 axes in raw value.
double	get_uT_x ()
	Gets the magnetic field strength in X-axis in µT (microTesla).
double	get_uT_y ()
	Gets the magnetic field strength in Y-axis in µT (microTesla).
double	get_uT_z ()
	Gets the magnetic field strength in Z-axis in µT (microTesla).
Mag_field_uT_t	get_uT_mag ()
	Gets a package of magnetic field strengths in 3 axes in µT (microTesla).
bool	compass_cal ()
	Calibrates the compass, and find the ranges of each axis respectively for compass usage.
Compass_cal_vals_t	get_prev_caled_vals ()
	Gets the previously calibrated values of the compass.
void	save_caled_vals ()
	Saves the calibrated values into local EEPROM.
bool	reset_heading ()
	Takes the current heading of compass as zero.
int16_t	get_re_zero_heading ()
	Gets the real-world heading referenced as zero-degrees.
void	save_re_zero_heading ()
	Saves the real-world heading referenced as zero-degrees into local EEPROM.
virtual uint16_t	get_heading ()
	Gets the heading of compass in degrees.

Additional Inherited Members
Protected Member Functions inherited from General_compass
void	set_raw_data (Mag_field_raw_t data)
	Sets the latest raw values of magnetic field strength in 3 axes.
void	set_cal_vals (Compass_cal_vals_t vals)
	Sets the calibration values.
Compass_cal_vals_t	get_eeprom_caled_vals ()
	Loads calibration values from EEPROM.
void	use_eeprom_re_zero_heading ()
	Uses the re-zero heading from EEPROM.
	General_compass ()
	Creates a General_compass object.
Protected Member Functions inherited from Heading_sensor
	Heading_sensor ()
	Creates a Heading_sensor object.
Protected Member Functions inherited from Supported_sensor
	Supported_sensor ()
	Creates an object of a supported sensor.
Protected Member Functions inherited from Supported_module
	Supported_module ()
	Creates an object of a supported module.

Detailed Description

QMC5883L Compass Driver for XRCU.

Author

YH Choi @ JM9

Constructor & Destructor Documentation

Qmc5883l()

Qmc5883l::Qmc5883l

(

const uint32_t

init_port

)

Creates a new Qmc5883l object.

Parameters

init_port

the I2C port connected to this QMC5883L magnetometer.

Member Function Documentation

begin() [1/2]

bool Qmc5883l::begin	(	const Compass_cal_vals_t	compass_cal_values,
		const uint8_t	init_i2c_address = DEFAULT_I2C_ADDRESS )

Configures the settings of the I2C bus and the QMC5883L magnetometer.

YOU MUST CALL THIS FUNCTION IN void setup () FUNCTION TO USE THIS OBJECT PROPERLY.

Parameters

compass_cal_values	the calibrated values of the QMC5883L magnetometer
init_i2c_address	the 7-bit I2C address of the QMC5883L magnetometer

Returns

true if activation succeed, false if activation failed

begin() [2/2]

bool Qmc5883l::begin

(

const uint8_t

init_i2c_address = DEFAULT_I2C_ADDRESS

)

Configures the settings of the I2C bus and the QMC5883L magnetometer.

YOU MUST CALL THIS FUNCTION IN void setup () FUNCTION TO USE THIS OBJECT PROPERLY.

Parameters

init_i2c_address

the 7-bit I2C address of the QMC5883L magnetometer

Returns

true if activation succeed, false if activation failed

get_raw_temp()

int16_t Qmc5883l::get_raw_temp

(

)

Gets the raw temperature reading.

The gain is factory-calibrated, but not the offset, so only the relative temperature is accurate.

Returns

the raw value of temperature sensor recorded by the chip in 2's complement (100 LSB / degree Celsius)

id()

uint8_t Qmc5883l::id

(

)

Reads the identification register.

Returns

the identification register, which should have a value of ASCII-encoded "H4C"

is_mag_present()

bool Qmc5883l::is_mag_present

(

)

Checks for the presence of the HMC5883L magnetometer on the I2C bus.

Returns

true if the HMC5883L magnetometer is found on the I2C bus, false otherwise

reset()

bool Qmc5883l::reset

(

)

Software-resets the QMC5883L.

Returns

true if software-reset signal is sent successfully, false if the signal failed to send

update()

bool Qmc5883l::update ( )

virtual

Fetches and updates new data from the compass.

Returns

true if new data is fetched and updated, false if new data is not ready

Implements General_compass.

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The documentation for this class was generated from the following files:

• Qmc5883l/src/Qmc5883l.h
• Qmc5883l/src/Qmc5883l.cpp