Macros
#define	ADXL345_CS 2

#define	ADXL345_DEVICE_ID_REG 0x00
	Device ID Register.

#define	ADXL345_OUTX_LOW_REG 0x32
	x Acceleration Data register (high)

#define	ADXL345_OUTX_HIGH_REG 0x33
	x Acceleration Data register (low)

#define	ADXL345_OUTY_LOW_REG 0x34
	y Acceleration Data register (high)

#define	ADXL345_OUTY_HIGH_REG 0x35
	y Acceleration Data register (low)

#define	ADXL345_OUTZ_LOW_REG 0x36
	z Acceleration Data register (high)

#define	ADXL345_OUTZ_HIGH_REG 0x37
	z Acceleration Data register (low)

#define	adxl345_raw_to_mg(raw) (raw * 62) / 16;
	Convert raw value to mg value.

Functions
int8_t	adxl345_available (void)
	Checks if ADXL345 is available. More...

int8_t	adxl345_init (void)
	Initialize the ADXL345 accelerometer. More...

void	adxl345_deinit (void)
	Deinitilizes the ADX345 accelerometer. More...

void	adxl345_set_g_range (uint8_t range)

void	adxl345_set_data_rate (uint8_t rate)

void	adxl345_set_fifomode (uint8_t mode)

void	adxl345_set_powermode (uint8_t mode)

uint8_t	adxl345_get_fifo_level ()
	Returns the current fill level of the internal FIFO (when operating in FIFO/Stream mode). More...

int16_t	adxl345_get_x (void)
	This function returns the current measured acceleration at the x-axis of the adxl345. More...

int16_t	adxl345_get_y (void)
	This function returns the current measured acceleration at the y-axis of the adxl345. More...

int16_t	adxl345_get_z (void)
	This function returns the current measured acceleration at the z-axis of the adxl345. More...

acc_data_t	adxl345_get (void)
	This function returns the current measured acceleration of all axis (x,y,z) More...

void	adxl345_write (uint8_t reg, uint8_t data)
	This function writes data to the given register of the ADXL345. More...

uint8_t	adxl345_read (uint8_t reg)
	This function reads from the given register of the ADXL345. More...

int8_t	adxl345_ready (void)
	Checks whether the device is ready or not by reading the ID. More...

BW_RATE register/bits
#define	ADXL345_BW_RATE_REG 0x2C
	ADXL Data Rate and Power Mode Control Register. More...

#define	ADXL345_LOW_POWER 4
	Low power bit pos. More...

#define	ADXL345_RATE_L 0
	Rate bits [4] pos. More...

POWER_CTL register/bits
#define	ADXL345_POWER_CTL_REG 0x2D
	ADXL Power Control Register. More...

#define	ADXL345_LINK 5
	Link bit pos. More...

#define	ADXL345_AUTO_SLEEP 4
	AUTO_SLEEP bit pos. More...

#define	ADXL345_MEASURE 3
	Measure bit pos. More...

#define	ADXL345_SLEEP 2
	Sleep bit pos. More...

#define	ADXL345_WAKEUP_L 0
	Wakeup bits [2] LSB pos. More...

DATA_FORMAT register/bits
#define	ADXL345_DATA_FORMAT_REG 0x31
	ADXL Data Format Register Register. More...

#define	ADXL345_SELF_TEST 7
	SELF_TEST bit pos. More...

#define	ADXL345_SPI 6
	SPI bit pos. More...

#define	ADXL345_INT_INVERT 5
	INT_INVERT bit pos. More...

#define	ADXL345_FULL_RES 3
	FULL_RES bit pos. More...

#define	ADXL345_JUSTIFY 2
	Justify bit pos. More...

#define	ADXL345_RANGE_L 0
	Range bits [2] LSB pos. More...

FIFO_CTL register/bits
#define	ADXL345_FIFO_CTL_REG 0x38
	FIFO control register.

#define	ADXL345_FIFO_MODE_L 6
	FIFO_MODE bits [2] LSB pos. More...

#define	ADXL345_TRIGGER 5
	Trigger bit pos. More...

#define	ADXL345_SAMPLES_L 0
	Samples bits [5] LSB pos. More...

FIFO_STATUS register/bits
#define	ADXL345_FIFO_STATUS_REG 0x39
	FIFO status register.

#define	ADXL345_FIFO_TRIG 7
	FIFO_TRIG bit pos. More...

#define	ADXL345_ENTRIES_L 0
	Entries bits [6] LSB pos. More...

g range settings
#define	ADXL345_MODE_2G (0x0 << ADXL345_RANGE_L)
	+/- 2g, 256 LSB/g

#define	ADXL345_MODE_4G (0x1 << ADXL345_RANGE_L)
	+/- 4g, 128 LSB/g

#define	ADXL345_MODE_8G (0x2 << ADXL345_RANGE_L)
	+/- 8g, 64 LSB/g

#define	ADXL345_MODE_16G (0x3 << ADXL345_RANGE_L)
	+/- 16g, 32 LSB/g

FIFO mode settings
#define	ADXL345_MODE_BYPASS (0x0 << ADXL345_FIFO_MODE_L)

#define	ADXL345_MODE_FIFO (0x1 << ADXL345_FIFO_MODE_L)

#define	ADXL345_MODE_STREAM (0x2 << ADXL345_FIFO_MODE_L)

#define	ADXL345_MODE_TRIGGER (0x3 << ADXL345_FIFO_MODE_L)

Power mode settings
#define	ADXL345_PMODE_SLEEP 1

#define	ADXL345_PMODE_WAKEUP 3

#define	ADXL345_PMODE_STANDBY 4

Values for output data rate
See Also ADXL345_BW_RATE_REG
#define	ADXL345_ODR_0HZ10 (0x0 << ADXL345_RATE_L)

#define	ADXL345_ODR_0HZ20 (0x1 << ADXL345_RATE_L)

#define	ADXL345_ODR_0HZ39 (0x2 << ADXL345_RATE_L)

#define	ADXL345_ODR_0HZ78 (0x3 << ADXL345_RATE_L)

#define	ADXL345_ODR_1HZ56 (0x4 << ADXL345_RATE_L)

#define	ADXL345_ODR_3HZ13 (0x5 << ADXL345_RATE_L)

#define	ADXL345_ODR_6HZ25 (0x6 << ADXL345_RATE_L)

#define	ADXL345_ODR_12HZ5 (0x7 << ADXL345_RATE_L)

#define	ADXL345_ODR_25HZ (0x8 << ADXL345_RATE_L)

#define	ADXL345_ODR_50HZ (0x9 << ADXL345_RATE_L)

#define	ADXL345_ODR_100HZ (0xA << ADXL345_RATE_L)

#define	ADXL345_ODR_200HZ (0xB << ADXL345_RATE_L)

#define	ADXL345_ODR_400HZ (0xC << ADXL345_RATE_L)

#define	ADXL345_ODR_800HZ (0xD << ADXL345_RATE_L)

#define	ADXL345_ODR_1600HZ (0xE << ADXL345_RATE_L)

#define	ADXL345_ODR_3200HZ (0xF << ADXL345_RATE_L)

Detailed Description

and Bits

All registers are named ADXL345_name_REG where name is the name of the register as described in the sensors datasheet.

All bit positions are named ADXL345_name for single bit entries and ADXL345_name_L for multiple bit entries, where the position always means the entries LSB.

Macro Definition Documentation

#define ADXL345_AUTO_SLEEP 4

AUTO_SLEEP bit pos.

Definition at line 91 of file adxl345.h.

#define ADXL345_BW_RATE_REG 0x2C

ADXL Data Rate and Power Mode Control Register.

Definition at line 77 of file adxl345.h.

Referenced by adxl345_init(), and adxl345_set_data_rate().

#define ADXL345_CS 2

SPI device order. The chip select number where the ADXL345 is connected to the BCD-decimal decoder

Definition at line 69 of file adxl345.h.

Referenced by adxl345_available(), adxl345_get(), adxl345_read(), and adxl345_write().

#define ADXL345_DATA_FORMAT_REG 0x31

ADXL Data Format Register Register.

Definition at line 103 of file adxl345.h.

Referenced by adxl345_init(), and adxl345_set_g_range().

#define ADXL345_ENTRIES_L 0

Entries bits [6] LSB pos.

Definition at line 137 of file adxl345.h.

#define ADXL345_FIFO_MODE_L 6

FIFO_MODE bits [2] LSB pos.

Definition at line 123 of file adxl345.h.

#define ADXL345_FIFO_TRIG 7

FIFO_TRIG bit pos.

Definition at line 135 of file adxl345.h.

#define ADXL345_FULL_RES 3

FULL_RES bit pos.

Definition at line 111 of file adxl345.h.

Referenced by adxl345_init().

#define ADXL345_INT_INVERT 5

INT_INVERT bit pos.

Definition at line 109 of file adxl345.h.

#define ADXL345_JUSTIFY 2

Justify bit pos.

Definition at line 113 of file adxl345.h.

#define ADXL345_LINK 5

Link bit pos.

Definition at line 89 of file adxl345.h.

#define ADXL345_LOW_POWER 4

Low power bit pos.

Definition at line 79 of file adxl345.h.

#define ADXL345_MEASURE 3

Measure bit pos.

Definition at line 93 of file adxl345.h.

Referenced by adxl345_init(), and adxl345_set_powermode().

#define ADXL345_POWER_CTL_REG 0x2D

ADXL Power Control Register.

Definition at line 87 of file adxl345.h.

Referenced by adxl345_init(), and adxl345_set_powermode().

#define ADXL345_RANGE_L 0

Range bits [2] LSB pos.

Definition at line 115 of file adxl345.h.

#define ADXL345_RATE_L 0

Rate bits [4] pos.

Definition at line 81 of file adxl345.h.

#define ADXL345_SAMPLES_L 0

Samples bits [5] LSB pos.

Definition at line 127 of file adxl345.h.

#define ADXL345_SELF_TEST 7

SELF_TEST bit pos.

Definition at line 105 of file adxl345.h.

#define ADXL345_SLEEP 2

Sleep bit pos.

Definition at line 95 of file adxl345.h.

Referenced by adxl345_set_powermode().

#define ADXL345_SPI 6

SPI bit pos.

Definition at line 107 of file adxl345.h.

#define ADXL345_TRIGGER 5

Trigger bit pos.

Definition at line 125 of file adxl345.h.

#define ADXL345_WAKEUP_L 0

Wakeup bits [2] LSB pos.

Definition at line 97 of file adxl345.h.

Referenced by adxl345_set_powermode().

Function Documentation

int8_t adxl345_available ( void )

Checks if ADXL345 is available.

Return values

1	available
0	not availabe

Definition at line 57 of file adxl345.c.

References ADXL345_CS, ADXL345_DEVICE_ID_REG, adxl345_read(), MSPI_BAUD_MAX, mspi_chip_release(), mspi_init(), and MSPI_MODE_3.

Referenced by adxl345_init().

void adxl345_deinit ( void )

Deinitilizes the ADX345 accelerometer.

I.e. sets it in standby mode.

Definition at line 93 of file adxl345.c.

References adxl345_set_powermode().

acc_data_t adxl345_get ( void )

This function returns the current measured acceleration of all axis (x,y,z)

Note: This is more efficient than reading each axis individually

Returns: current acceleration value of all axis

Definition at line 180 of file adxl345.c.

References ADXL345_CS, ADXL345_OUTX_LOW_REG, mspi_chip_release(), mspi_chip_select(), and mspi_transceive().

uint8_t adxl345_get_fifo_level ( )

Returns the current fill level of the internal FIFO (when operating in FIFO/Stream mode).

Returns: Fill level [0 - 33]

Definition at line 143 of file adxl345.c.

References ADXL345_FIFO_STATUS_REG, and adxl345_read().

int16_t adxl345_get_x ( void )

This function returns the current measured acceleration at the x-axis of the adxl345.

Returns: current x-axis acceleration value

Definition at line 149 of file adxl345.c.

References ADXL345_OUTX_HIGH_REG, ADXL345_OUTX_LOW_REG, and adxl345_read().

int16_t adxl345_get_y ( void )

This function returns the current measured acceleration at the y-axis of the adxl345.

Returns: current y-axis acceleration value

Definition at line 160 of file adxl345.c.

References ADXL345_OUTY_HIGH_REG, ADXL345_OUTY_LOW_REG, and adxl345_read().

int16_t adxl345_get_z ( void )

This function returns the current measured acceleration at the z-axis of the adxl345.

Returns: current z-axis acceleration value

Definition at line 170 of file adxl345.c.

References ADXL345_OUTZ_HIGH_REG, ADXL345_OUTZ_LOW_REG, and adxl345_read().

int8_t adxl345_init ( void )

Initialize the ADXL345 accelerometer.

Default settings are: TODO

Return values

0	Initialization succeeded
-1	Initialization failed

Definition at line 74 of file adxl345.c.

References adxl345_available(), ADXL345_BW_RATE_REG, ADXL345_DATA_FORMAT_REG, ADXL345_FULL_RES, ADXL345_MEASURE, ADXL345_POWER_CTL_REG, and adxl345_write().

uint8_t adxl345_read ( uint8_t reg )

This function reads from the given register of the ADXL345.

Parameters

reg	The register address

Returns: The data value

Definition at line 224 of file adxl345.c.

References ADXL345_CS, mspi_chip_release(), mspi_chip_select(), and mspi_transceive().

Referenced by adxl345_available(), adxl345_get_fifo_level(), adxl345_get_x(), adxl345_get_y(), adxl345_get_z(), adxl345_set_data_rate(), adxl345_set_fifomode(), adxl345_set_g_range(), and adxl345_set_powermode().

int8_t adxl345_ready ( void )

Checks whether the device is ready or not by reading the ID.

Return values

1	ready
0	not ready

void adxl345_set_data_rate ( uint8_t rate )

Parameters

rate

Definition at line 107 of file adxl345.c.

References ADXL345_BW_RATE_REG, adxl345_read(), and adxl345_write().

void adxl345_set_fifomode ( uint8_t mode )

Parameters

mode	One of ADXL345_MODE_BYPASS, ADXL345_MODE_FIFO, ADXL345_MODE_STREAM, ADXL345_MODE_TRIGGER

Definition at line 114 of file adxl345.c.

References ADXL345_FIFO_CTL_REG, adxl345_read(), and adxl345_write().

void adxl345_set_g_range ( uint8_t range )

Parameters

range

Definition at line 100 of file adxl345.c.

References ADXL345_DATA_FORMAT_REG, adxl345_read(), and adxl345_write().

void adxl345_set_powermode ( uint8_t mode )

Parameters

mode	One of ADXL345_PMODE_SLEEP, ADXL345_PMODE_WAKEUP, ADXL345_PMODE_STANDBY

Definition at line 121 of file adxl345.c.

References ADXL345_MEASURE, ADXL345_POWER_CTL_REG, adxl345_read(), ADXL345_SLEEP, ADXL345_WAKEUP_L, and adxl345_write().

Referenced by adxl345_deinit().

void adxl345_write	(	uint8_t	reg,
		uint8_t	data
	)

This function writes data to the given register of the ADXL345.

Parameters

reg	The register address
data	The data value

Definition at line 214 of file adxl345.c.

References ADXL345_CS, mspi_chip_release(), mspi_chip_select(), and mspi_transceive().

Referenced by adxl345_init(), adxl345_set_data_rate(), adxl345_set_fifomode(), adxl345_set_g_range(), and adxl345_set_powermode().

Macros

Functions

BW_RATE register/bits

POWER_CTL register/bits

DATA_FORMAT register/bits

FIFO_CTL register/bits

FIFO_STATUS register/bits

g range settings

FIFO mode settings

Power mode settings

Values for output data rate

Detailed Description

and Bits

Macro Definition Documentation

Function Documentation