    Implementation of LIS3DH SPI driver used in the Mulle platform.

More...

#include "lis3dh.h"
#include <stdint.h>
#include <stdio.h>

Functions
void	lis3dh_set_bits (const lis3dh_reg_addr_t addr, const uint8_t mask)
	Set bits of an 8-bit register on the LIS3DH.

void	lis3dh_clear_bits (const lis3dh_reg_addr_t addr, const uint8_t mask)
	Clear bits of an 8-bit register on the LIS3DH.

void	lis3dh_write_bits (const lis3dh_reg_addr_t addr, const uint8_t mask, const uint8_t values)
	Write (both set and clear) bits of an 8-bit register on the LIS3DH. More...

int16_t	lis3dh_read_xaxis ()
	Get one X-axis reading from the accelerometer. More...

int16_t	lis3dh_read_yaxis ()
	Get one Y-axis reading from the accelerometer. More...

int16_t	lis3dh_read_zaxis ()
	Get one Z-axis reading from the accelerometer. More...

void	lis3dh_read_xyz (int16_t *buffer)
	Read all three axes in a single transaction. More...

int16_t	lis3dh_read_aux_adc1 ()
	Get one reading from the first channel of the auxiliary ADC. More...

int16_t	lis3dh_read_aux_adc2 ()
	Get one reading from the second channel of the auxiliary ADC. More...

int16_t	lis3dh_read_aux_adc3 ()
	Get one reading from the third channel of the auxiliary ADC. More...

void	lis3dh_set_aux_adc (const uint8_t enable, const uint8_t temperature)
	Turn on/off power to the auxiliary ADC in LIS3DH. More...

void	lis3dh_set_axes (const uint8_t axes)
	Enable/disable accelerometer axes. More...

void	lis3dh_set_fifo_mode (const lis3dh_fifo_mode_t mode)
	Set the FIFO mode. More...

void	lis3dh_set_fifo (const uint8_t enable)
	Enable/disable the FIFO. More...

void	lis3dh_set_odr (const lis3dh_odr_t odr)
	Set the output data rate of the sensor. More...

void	lis3dh_set_scale (const lis3dh_scale_t scale)
	Set the full scale range of the sensor. More...

void	lis3dh_init ()
	Initialize a LIS3DH accelerometer. More...

Detailed Description

    Implementation of LIS3DH SPI driver used in the Mulle platform.

Author: Joakim Gebart joaki.nosp@m.m.ge.nosp@m.bart@.nosp@m.eist.nosp@m.ec.se

Definition in file lis3dh.c.

Function Documentation

void lis3dh_init ( )

Initialize a LIS3DH accelerometer.

Todo:: Signal errors when initializing the LIS3DH hardware.

Definition at line 261 of file lis3dh.c.

References lis3dh_arch_init(), lis3dh_read_byte(), LIS3DH_WHO_AM_I_RESPONSE, and lis3dh_write_byte().

int16_t lis3dh_read_aux_adc1 ( )

Get one reading from the first channel of the auxiliary ADC.

Returns: The current ADC reading.

Definition at line 134 of file lis3dh.c.

References lis3dh_read_int16().

int16_t lis3dh_read_aux_adc2 ( )

Get one reading from the second channel of the auxiliary ADC.

Returns: The current ADC reading.

Definition at line 144 of file lis3dh.c.

References lis3dh_read_int16().

int16_t lis3dh_read_aux_adc3 ( )

Get one reading from the third channel of the auxiliary ADC.

Note: The internal temperature sensor is connected to the third channel on the auxiliary ADC when the TEMP_EN bit of TEMP_CFG_REG is set.

Returns: The current ADC reading.

Definition at line 157 of file lis3dh.c.

References lis3dh_read_int16().

int16_t lis3dh_read_xaxis ( )

Get one X-axis reading from the accelerometer.

Returns: The oldest X axis acceleration measurement available.

Definition at line 93 of file lis3dh.c.

References lis3dh_read_int16().

void lis3dh_read_xyz ( int16_t * buffer )

Read all three axes in a single transaction.

Parameters

buffer Pointer to an int16_t[3] buffer.

Definition at line 123 of file lis3dh.c.

References LIS3DH_ACC_DATA_SIZE, and lis3dh_memcpy_from_device().

int16_t lis3dh_read_yaxis ( )

Get one Y-axis reading from the accelerometer.

Returns: The oldest Y axis acceleration measurement available.

Definition at line 103 of file lis3dh.c.

References lis3dh_read_int16().

int16_t lis3dh_read_zaxis ( )

Get one Z-axis reading from the accelerometer.

Returns: The oldest Z axis acceleration measurement available.

Definition at line 113 of file lis3dh.c.

References lis3dh_read_int16().

void lis3dh_set_aux_adc	(	const uint8_t	enable,
		const uint8_t	temperature
	)

Turn on/off power to the auxiliary ADC in LIS3DH.

Parameters

enable	Power state of the auxiliary ADC
temperature	If not zero, switch the ADC mux so that a temperature reading is available on OUT_3_L, OUT_3_H.

Note: This ADC is only used for the temperature reading and the external ADC pins. The accelerometer ADC is turned on by lis3dh_set_odr().

Definition at line 172 of file lis3dh.c.

References LIS3DH_TEMP_CFG_REG_ADC_PD_MASK, LIS3DH_TEMP_CFG_REG_TEMP_EN_MASK, and lis3dh_write_bits().

void lis3dh_set_axes ( const uint8_t axes )

Enable/disable accelerometer axes.

Parameters

axes	An OR-ed combination of LIS3DH_AXES_X, LIS3DH_AXES_Y, LIS3DH_AXES_Z.

Note: The macro LIS3DH_AXES_XYZ is a convenience shortcut to enable all axes.

Definition at line 186 of file lis3dh.c.

References lis3dh_write_bits().

void lis3dh_set_fifo ( const uint8_t enable )

Enable/disable the FIFO.

Parameters

enable If zero, disable the FIFO, otherwise enables the FIFO.

Definition at line 207 of file lis3dh.c.

References LIS3DH_CTRL_REG5_FIFO_EN_MASK, and lis3dh_write_bits().

void lis3dh_set_fifo_mode ( const lis3dh_fifo_mode_t mode )

Set the FIFO mode.

Parameters

mode	The chosen FIFO mode.

Definition at line 196 of file lis3dh.c.

References lis3dh_write_bits().

void lis3dh_set_odr ( const lis3dh_odr_t odr )

Set the output data rate of the sensor.

Parameters

odr	Chosen output data rate.

Definition at line 218 of file lis3dh.c.

References LIS3DH_CTRL_REG1_ODR_SHIFT, and lis3dh_write_bits().

void lis3dh_set_scale ( const lis3dh_scale_t scale )

Set the full scale range of the sensor.

Valid values for scale is 2, 4, 8, 16 and represents the full range of the sensor.

Parameters

scale The chosen sensitivity scale.

Definition at line 231 of file lis3dh.c.

References lis3dh_write_bits().

void lis3dh_write_bits	(	const lis3dh_reg_addr_t	addr,
		const uint8_t	mask,
		const uint8_t	values
	)

Write (both set and clear) bits of an 8-bit register on the LIS3DH.

Parameters

addr	Register address on the LIS3DH.
mask	Bitmask for the bits to modify.
values	The values to write to the masked bits.

Definition at line 77 of file lis3dh.c.

References lis3dh_read_byte(), and lis3dh_write_byte().

Referenced by lis3dh_set_aux_adc(), lis3dh_set_axes(), lis3dh_set_fifo(), lis3dh_set_fifo_mode(), lis3dh_set_odr(), and lis3dh_set_scale().

Functions

Detailed Description

Function Documentation