Bosch BMA250 3-axis accelerometer driver.

This file contains functions for initializing and reading data from a Bosch BMA250 3-axis accelerometer.

#include <asf.h>

Macros
#define	BMA250_DATA_RESOLUTION (10) /* signed axis data size (bits) */

#define	BMA250_SPI_MODE (3)

#define	BMA250_TEMP_OFFSET (24) /* temperature center (Celsius) */

#define	BMA250_TWI_ADDR (0x18)


#define	BMA250_ID_VAL (0x03)
	BMA250 Register Bit Definitions. More...

#define	BMA250_FLAT_INT (1 << 7) /* flat interrupt status */

#define	BMA250_ORIENT_INT (1 << 6) /* orientation interrupt status */

#define	BMA250_S_TAP_INT (1 << 5) /* single tap interrupt status */

#define	BMA250_D_TAP_INT (1 << 4) /* double tap interrupt status */

#define	BMA250_SLOPE_INT (1 << 2) /* slope interrupt status */

#define	BMA250_HIGH_INT (1 << 1) /* high-g interrupt status */

#define	BMA250_LOW_INT (1 << 0) /* low-g interrupt status */

#define	BMA250_DATA_INT (1 << 7) /* new data interrupt status */

#define	BMA250_TAP_SIGN_POS (1 << 7) /* tap interrupt sign (0=negative) */

#define	BMA250_TAP_FIRST_Z (1 << 6) /* z-axis triggered tap interrupt */

#define	BMA250_TAP_FIRST_Y (1 << 5) /* y-axis triggered tap interrupt */

#define	BMA250_TAP_FIRST_X (1 << 4) /* x-axis triggered tap interrupt */

#define	BMA250_SLOPE_SIGN_POS (1 << 3) /* slope interrupt sign (0=negative) */

#define	BMA250_SLOPE_FIRST_Z (1 << 2) /* z-axis triggered slope interrupt */

#define	BMA250_SLOPE_FIRST_Y (1 << 1) /* y-axis triggered slope interrupt */

#define	BMA250_SLOPE_FIRST_X (1 << 0) /* x-axis triggered slope interrupt */

#define	BMA250_FLAT (1 << 7) /* flat condition is fulfilled */

#define	BMA250_Z_DOWN (1 << 6) /* z-axis orientation (0=upward) */

#define	BMA250_XY_PORTRAIT_UP (0 << 4) /* x-y plane portrait upright */

#define	BMA250_XY_PORTRAIT_DOWN (1 << 4) /* x-y plane portrait upside-down */

#define	BMA250_XY_LANDSCAPE_L (2 << 4) /* x-y plane landscape left */

#define	BMA250_XY_LANDSCAPE_R (3 << 4) /* x-y plane landscape right */

#define	BMA250_HIGH_SIGN_NEG

#define	BMA250_HIGH_FIRST_Z (1 << 2) /* z-axis triggered high-g interrupt */

#define	BMA250_HIGH_FIRST_Y (1 << 1) /* y-axis triggered high-g interrupt */

#define	BMA250_HIGH_FIRST_X (1 << 0) /* x-axis triggered high-g interrupt */

#define	BMA250_RANGE_2G (0x03) /* +/- 2g range (default) */

#define	BMA250_RANGE_4G (0x05) /* +/- 4g range */

#define	BMA250_RANGE_8G (0x08) /* +/- 8g range */

#define	BMA250_RANGE_16G (0x0c) /* +/- 16g range */

#define	BMA250_BANDWIDTH_8Hz (0x08) /* 7.81 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_16Hz (0x09) /* 15.63 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_31Hz (0x0a) /* 31.25 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_63Hz (0x0b) /* 62.5 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_125Hz (0x0c) /* 125 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_250Hz (0x0d) /* 250 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_500Hz (0x0e) /* 500 Hz filtered data bandwidth */

#define	BMA250_BANDWIDTH_1000Hz (0x0f) /* 1000 Hz filtered data bandwidth */

#define	BMA250_SUSPEND (1 << 7) /* set suspend mode (0=reset mode) */

#define	BMA250_LOWPOWER_EN (1 << 6) /* set low-power mode (0=reset mode) */

#define	BMA250_SLEEP_DUR_0_5ms (5 << 1) /* 0.5 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_1ms (6 << 1) /* 1 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_2ms (7 << 1) /* 2 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_4ms (8 << 1) /* 4 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_6ms (9 << 1) /* 6 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_10ms (10 << 1) /* 6 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_25ms (11 << 1) /* 25 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_50ms (12 << 1) /* 50 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_100ms (13 << 1) /* 100 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_500ms (14 << 1) /* 500 ms sleep phase duration */

#define	BMA250_SLEEP_DUR_1000ms (15 << 1) /* 1 s sleep phase duration */

#define	BMA250_DATA_UNFILTERED (1 << 7) /* unfiltered accel data (0=filtered) */

#define	BMA250_RESET (0xb6) /* user-triggered reset write value */

#define	BMA250_FLAT_EN (1 << 7) /* flat interrupt enable */

#define	BMA250_ORIENT_EN (1 << 6) /* orientation interrupt enable */

#define	BMA250_S_TAP_EN (1 << 5) /* single tap interrupt enable */

#define	BMA250_D_TAP_EN (1 << 4) /* double tap interrupt enable */

#define	BMA250_SLOPE_EN_Z (1 << 2) /* z-axis slope interrupt enable */

#define	BMA250_SLOPE_EN_Y (1 << 1) /* y-axis slope interrupt enable */

#define	BMA250_SLOPE_EN_X (1 << 0) /* x-axis slope interrupt enable */

#define	BMA250_DATA_EN (1 << 4) /* new data interrupt enable */

#define	BMA250_LOW_EN (1 << 3) /* low-g interrupt enable */

#define	BMA250_HIGH_EN_Z (1 << 2) /* z-axis high-g interrupt enable */

#define	BMA250_HIGH_EN_Y (1 << 1) /* y-axis high-g interrupt enable */

#define	BMA250_HIGH_EN_X (1 << 0) /* x-axis high-g interrupt enable */

#define	BMA250_INT1_FLAT (1 << 7) /* map flat interrupt to INT1 */

#define	BMA250_INT1_ORIENT (1 << 6) /* map orientation interrupt to INT1 */

#define	BMA250_INT1_S_TAP (1 << 5) /* map single tap interrupt to INT1 */

#define	BMA250_INT1_D_TAP (1 << 4) /* map double tap interrupt to INT1 */

#define	BMA250_INT1_SLOPE (1 << 2) /* map slope interrupt to INT1 */

#define	BMA250_INT1_HIGH (1 << 1) /* map high-g interrupt to INT1 */

#define	BMA250_INT1_LOW (1 << 0) /* map low-g interrupt to INT1 */

#define	BMA250_INT2_DATA (1 << 7) /* map new data interrupt to INT2 */

#define	BMA250_INT1_DATA (1 << 0) /* map new data interrupt to INT1 */

#define	BMA250_INT2_FLAT (1 << 7) /* map flat interrupt to INT2 */

#define	BMA250_INT2_ORIENT (1 << 6) /* map orientation interrupt to INT2 */

#define	BMA250_INT2_S_TAP (1 << 5) /* map single tap interrupt to INT2 */

#define	BMA250_INT2_D_TAP (1 << 4) /* map double tap interrupt to INT2 */

#define	BMA250_INT2_SLOPE (1 << 2) /* map slope interrupt to INT2 */

#define	BMA250_INT2_HIGH (1 << 1) /* map high-g interrupt to INT2 */

#define	BMA250_INT2_LOW (1 << 0) /* map low-g interrupt to INT2 */

#define	BMA250_INT_SRC_DATA

#define	BMA250_INT_SRC_TAP (1 << 4) /* unfiltered s/d tap interrupt data */

#define	BMA250_INT_SRC_SLOPE (1 << 2) /* unfiltered slope interrupt data */

#define	BMA250_INT_SRC_HIGH (1 << 1) /* unfiltered high-g interrupt data */

#define	BMA250_INT_SRC_LOW (1 << 0) /* unfiltered low-g interrupt data */

#define	BMA250_INT2_OD (1 << 3) /* open drive for INT2 pin */

#define	BMA250_INT2_LVL_1 (1 << 2) /* active level 1 for INT2 (default) */

#define	BMA250_INT1_OD (1 << 1) /* open drive for INT1 pin */

#define	BMA250_INT1_LVL_1 (1 << 0) /* active level 1 for INT1 (default) */

#define	BMA250_RESET_INT (0x80) /* reset any latched interrupt */

#define	BMA250_INT_NON_LATCHED (0x00) /* non-latched interrupt (default) */

#define	BMA250_INT_TMP_250ms (0x01) /* 250ms temporary latched interrupt */

#define	BMA250_INT_TMP_500ms (0x02) /* 500ms temporary latched interrupt */

#define	BMA250_INT_TMP_1sec

#define	BMA250_INT_TMP_2sec

#define	BMA250_INT_TMP_4sec

#define	BMA250_INT_TMP_8sec

#define	BMA250_INT_TMP_500us (0x0a) /* 500us temporary latched interrupt */

#define	BMA250_INT_TMP_1ms (0x0b) /* 1ms temporary latched interrupt */

#define	BMA250_INT_TMP_12_5ms

#define	BMA250_INT_TMP_25ms (0x0d) /* 25ms temporary latched interrupt */

#define	BMA250_INT_TMP_50ms (0x0e) /* 50ms temporary latched interrupt */

#define	BMA250_INT_LATCHED (0x0f) /* latched interrupt mode */

#define	BMA250_TAP_TH_FIELD (0x1f) /* tap interrupt threshold field */
	BMA250_LOW_G_DURATION (0x22) More...

#define	BMA250_TAP_SAMP_FIELD (0xc0) /* tap wake-up samples count field */

#define	BMA250_SELF_TEST_NONE (0x00) /* no self-test (default) */

#define	BMA250_SELF_TEST_AXIS_X (0x01) /* self-test positive x-axis */

#define	BMA250_SELF_TEST_AXIS_Y (0x02) /* self-test positive y-axis */

#define	BMA250_SELF_TEST_AXIS_Z (0x03) /* self-test positive z-axis */

Enumerations
enum	bma250_register_t { BMA250_CHIP_ID = 0, BMA250_01_RSVD, BMA250_NEW_DATA_X, BMA250_ACC_X, BMA250_NEW_DATA_Y, BMA250_ACC_Y, BMA250_NEW_DATA_Z, BMA250_ACC_Z, BMA250_TEMP, BMA250_INTR_STATUS, BMA250_NEW_DATA_STATUS, BMA250_TAP_SLOPE_STATUS, BMA250_ORIENTATION_STATUS, BMA250_0D_RSVD, BMA250_0E_RSVD, BMA250_G_RANGE, BMA250_BANDWIDTH, BMA250_POWER_MODES, BMA250_12_RSVD, BMA250_DATA_HIGH_BW, BMA250_SOFTRESET, BMA250_15_RSVD, BMA250_16_INTR_EN, BMA250_17_INTR_EN, BMA250_18_RSVD, BMA250_19_INTR_MAP, BMA250_1A_INTR_MAP, BMA250_1B_INTR_MAP, BMA250_1C_RSVD, BMA250_1D_RSVD, BMA250_INTR_DATA_SRC, BMA250_1F_RSVD, BMA250_INTR_PIN_CONFIG, BMA250_INTR_PIN_MODE, BMA250_LOW_G_DURATION, BMA250_LOW_G_THRESHOLD, BMA250_EVENT_HYSTERESIS, BMA250_HIGH_G_DURATION, BMA250_HIGH_G_THRESHOLD, BMA250_SLOPE_DURATION, BMA250_SLOPE_THRESHOLD, BMA250_29_RSVD, BMA250_TAP_TIMING, BMA250_TAP_CONFIG, BMA250_ORIENTATION_CONFIG, BMA250_ORIENTATION_THETA, BMA250_FLAT_THETA, BMA250_FLAT_HOLD_TIME, BMA250_30_RSVD, BMA250_31_RSVD, BMA250_SENSOR_SELF_TEST, BMA250_EEPROM_CONTROL, BMA250_DIGITAL_IO_CONTROL, BMA250_35_RSVD, BMA250_FAST_OFFSET_COMP, BMA250_SLOW_OFFSET_COMP, BMA250_OFFSET_FILT_X, BMA250_OFFSET_FILT_Y, BMA250_OFFSET_FILT_Z, BMA250_OFFSET_UNFILT_X, BMA250_OFFSET_UNFILT_Y, BMA250_OFFSET_UNFILT_Z }
	Standard Register Addresses (TWI & SPI) More...

Functions
bool	bma250_init (sensor_t *, int)
	Bosch BMA250 accelerometer driver initialization. More...

#define BMA250_BANDWIDTH_1000Hz (0x0f) /* 1000 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_125Hz (0x0c) /* 125 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_16Hz (0x09) /* 15.63 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_250Hz (0x0d) /* 250 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_31Hz (0x0a) /* 31.25 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_500Hz (0x0e) /* 500 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_63Hz (0x0b) /* 62.5 Hz filtered data bandwidth */

#define BMA250_BANDWIDTH_8Hz (0x08) /* 7.81 Hz filtered data bandwidth */

#define BMA250_D_TAP_EN (1 << 4) /* double tap interrupt enable */

Referenced by bma250_event().

#define BMA250_D_TAP_INT (1 << 4) /* double tap interrupt status */

#define BMA250_DATA_EN (1 << 4) /* new data interrupt enable */

Referenced by bma250_event().

#define BMA250_DATA_INT (1 << 7) /* new data interrupt status */

#define BMA250_DATA_RESOLUTION (10) /* signed axis data size (bits) */

Referenced by bma250_init().

#define BMA250_DATA_UNFILTERED (1 << 7) /* unfiltered accel data (0=filtered) */

#define BMA250_FLAT (1 << 7) /* flat condition is fulfilled */

#define BMA250_FLAT_EN (1 << 7) /* flat interrupt enable */

#define BMA250_FLAT_INT (1 << 7) /* flat interrupt status */

#define BMA250_HIGH_EN_X (1 << 0) /* x-axis high-g interrupt enable */

Referenced by bma250_event().

#define BMA250_HIGH_EN_Y (1 << 1) /* y-axis high-g interrupt enable */

Referenced by bma250_event().

#define BMA250_HIGH_EN_Z (1 << 2) /* z-axis high-g interrupt enable */

Referenced by bma250_event().

#define BMA250_HIGH_FIRST_X (1 << 0) /* x-axis triggered high-g interrupt */

#define BMA250_HIGH_FIRST_Y (1 << 1) /* y-axis triggered high-g interrupt */

#define BMA250_HIGH_FIRST_Z (1 << 2) /* z-axis triggered high-g interrupt */

#define BMA250_HIGH_INT (1 << 1) /* high-g interrupt status */

#define BMA250_HIGH_SIGN_NEG

Value:

(1 << 3) /* high-g interrupt sign

* (0=positive) */

#define BMA250_ID_VAL (0x03)

BMA250 Register Bit Definitions.

Referenced by bma250_init().

#define BMA250_INT1_D_TAP (1 << 4) /* map double tap interrupt to INT1 */

#define BMA250_INT1_DATA (1 << 0) /* map new data interrupt to INT1 */

#define BMA250_INT1_FLAT (1 << 7) /* map flat interrupt to INT1 */

#define BMA250_INT1_HIGH (1 << 1) /* map high-g interrupt to INT1 */

#define BMA250_INT1_LOW (1 << 0) /* map low-g interrupt to INT1 */

#define BMA250_INT1_LVL_1 (1 << 0) /* active level 1 for INT1 (default) */

#define BMA250_INT1_OD (1 << 1) /* open drive for INT1 pin */

#define BMA250_INT1_ORIENT (1 << 6) /* map orientation interrupt to INT1 */

#define BMA250_INT1_S_TAP (1 << 5) /* map single tap interrupt to INT1 */

#define BMA250_INT1_SLOPE (1 << 2) /* map slope interrupt to INT1 */

#define BMA250_INT2_D_TAP (1 << 4) /* map double tap interrupt to INT2 */

#define BMA250_INT2_DATA (1 << 7) /* map new data interrupt to INT2 */

#define BMA250_INT2_FLAT (1 << 7) /* map flat interrupt to INT2 */

#define BMA250_INT2_HIGH (1 << 1) /* map high-g interrupt to INT2 */

#define BMA250_INT2_LOW (1 << 0) /* map low-g interrupt to INT2 */

#define BMA250_INT2_LVL_1 (1 << 2) /* active level 1 for INT2 (default) */

#define BMA250_INT2_OD (1 << 3) /* open drive for INT2 pin */

#define BMA250_INT2_ORIENT (1 << 6) /* map orientation interrupt to INT2 */

#define BMA250_INT2_S_TAP (1 << 5) /* map single tap interrupt to INT2 */

#define BMA250_INT2_SLOPE (1 << 2) /* map slope interrupt to INT2 */

#define BMA250_INT_LATCHED (0x0f) /* latched interrupt mode */

#define BMA250_INT_NON_LATCHED (0x00) /* non-latched interrupt (default) */

#define BMA250_INT_SRC_DATA

Value:

(1 << 5) /* unfiltered new data interrupt

* data */

#define BMA250_INT_SRC_HIGH (1 << 1) /* unfiltered high-g interrupt data */

#define BMA250_INT_SRC_LOW (1 << 0) /* unfiltered low-g interrupt data */

#define BMA250_INT_SRC_SLOPE (1 << 2) /* unfiltered slope interrupt data */

#define BMA250_INT_SRC_TAP (1 << 4) /* unfiltered s/d tap interrupt data */

#define BMA250_INT_TMP_12_5ms

Value:

(0x0c) /* 12.5ms temporary latched

* interrupt */

#define BMA250_INT_TMP_1ms (0x0b) /* 1ms temporary latched interrupt */

#define BMA250_INT_TMP_1sec

Value:

(0x03) /* 1000ms temporary latched

* interrupt */

#define BMA250_INT_TMP_250ms (0x01) /* 250ms temporary latched interrupt */

#define BMA250_INT_TMP_25ms (0x0d) /* 25ms temporary latched interrupt */

#define BMA250_INT_TMP_2sec

Value:

(0x04) /* 2000ms temporary latched

* interrupt */

#define BMA250_INT_TMP_4sec

Value:

(0x05) /* 4000ms temporary latched

* interrupt */

#define BMA250_INT_TMP_500ms (0x02) /* 500ms temporary latched interrupt */

#define BMA250_INT_TMP_500us (0x0a) /* 500us temporary latched interrupt */

#define BMA250_INT_TMP_50ms (0x0e) /* 50ms temporary latched interrupt */

#define BMA250_INT_TMP_8sec

Value:

(0x06) /* 8000ms temporary latched

* interrupt */

#define BMA250_LOW_EN (1 << 3) /* low-g interrupt enable */

Referenced by bma250_event().

#define BMA250_LOW_INT (1 << 0) /* low-g interrupt status */

#define BMA250_LOWPOWER_EN (1 << 6) /* set low-power mode (0=reset mode) */

Referenced by bma250_sleep_en().

#define BMA250_ORIENT_EN (1 << 6) /* orientation interrupt enable */

#define BMA250_ORIENT_INT (1 << 6) /* orientation interrupt status */

#define BMA250_RANGE_16G (0x0c) /* +/- 16g range */

#define BMA250_RANGE_2G (0x03) /* +/- 2g range (default) */

#define BMA250_RANGE_4G (0x05) /* +/- 4g range */

#define BMA250_RANGE_8G (0x08) /* +/- 8g range */

#define BMA250_RESET (0xb6) /* user-triggered reset write value */

Referenced by bma250_set_state().

#define BMA250_RESET_INT (0x80) /* reset any latched interrupt */

#define BMA250_S_TAP_EN (1 << 5) /* single tap interrupt enable */

Referenced by bma250_event().

#define BMA250_S_TAP_INT (1 << 5) /* single tap interrupt status */

#define BMA250_SELF_TEST_AXIS_X (0x01) /* self-test positive x-axis */

#define BMA250_SELF_TEST_AXIS_Y (0x02) /* self-test positive y-axis */

#define BMA250_SELF_TEST_AXIS_Z (0x03) /* self-test positive z-axis */

#define BMA250_SELF_TEST_NONE (0x00) /* no self-test (default) */

#define BMA250_SLEEP_DUR_0_5ms (5 << 1) /* 0.5 ms sleep phase duration */

#define BMA250_SLEEP_DUR_1000ms (15 << 1) /* 1 s sleep phase duration */

#define BMA250_SLEEP_DUR_100ms (13 << 1) /* 100 ms sleep phase duration */

#define BMA250_SLEEP_DUR_10ms (10 << 1) /* 6 ms sleep phase duration */

#define BMA250_SLEEP_DUR_1ms (6 << 1) /* 1 ms sleep phase duration */

Referenced by bma250_sleep_en().

#define BMA250_SLEEP_DUR_25ms (11 << 1) /* 25 ms sleep phase duration */

#define BMA250_SLEEP_DUR_2ms (7 << 1) /* 2 ms sleep phase duration */

#define BMA250_SLEEP_DUR_4ms (8 << 1) /* 4 ms sleep phase duration */

#define BMA250_SLEEP_DUR_500ms (14 << 1) /* 500 ms sleep phase duration */

#define BMA250_SLEEP_DUR_50ms (12 << 1) /* 50 ms sleep phase duration */

#define BMA250_SLEEP_DUR_6ms (9 << 1) /* 6 ms sleep phase duration */

#define BMA250_SLOPE_EN_X (1 << 0) /* x-axis slope interrupt enable */

Referenced by bma250_event().

#define BMA250_SLOPE_EN_Y (1 << 1) /* y-axis slope interrupt enable */

Referenced by bma250_event().

#define BMA250_SLOPE_EN_Z (1 << 2) /* z-axis slope interrupt enable */

Referenced by bma250_event().

#define BMA250_SLOPE_FIRST_X (1 << 0) /* x-axis triggered slope interrupt */

#define BMA250_SLOPE_FIRST_Y (1 << 1) /* y-axis triggered slope interrupt */

#define BMA250_SLOPE_FIRST_Z (1 << 2) /* z-axis triggered slope interrupt */

#define BMA250_SLOPE_INT (1 << 2) /* slope interrupt status */

#define BMA250_SLOPE_SIGN_POS (1 << 3) /* slope interrupt sign (0=negative) */

#define BMA250_SPI_MODE (3)

#define BMA250_SUSPEND (1 << 7) /* set suspend mode (0=reset mode) */

Referenced by bma250_set_state().

#define BMA250_TAP_FIRST_X (1 << 4) /* x-axis triggered tap interrupt */

#define BMA250_TAP_FIRST_Y (1 << 5) /* y-axis triggered tap interrupt */

#define BMA250_TAP_FIRST_Z (1 << 6) /* z-axis triggered tap interrupt */

#define BMA250_TAP_SAMP_FIELD (0xc0) /* tap wake-up samples count field */

#define BMA250_TAP_SIGN_POS (1 << 7) /* tap interrupt sign (0=negative) */

#define BMA250_TAP_TH_FIELD (0x1f) /* tap interrupt threshold field */

BMA250_LOW_G_DURATION (0x22)

Low-G interrupt delay time constants where the physical delay time is computed as: delay[ms] = [low_dur + 1] * 2ms. The default value is 0x09 corresponding to a delay of 20ms. BMA250_LOW_G_THRESHOLD (0x23)

The log-g interrupt threshold value LSB corresponds to an acceleration of 7.81mg with range 0 to 1.992g. The default value is 0x30 corresponding to 375mg.

Referenced by bma250_get_threshold(), and bma250_set_threshold().

#define BMA250_TEMP_OFFSET (24) /* temperature center (Celsius) */

Referenced by bma250_get_temperature().

#define BMA250_TWI_ADDR (0x18)

#define BMA250_XY_LANDSCAPE_L (2 << 4) /* x-y plane landscape left */

#define BMA250_XY_LANDSCAPE_R (3 << 4) /* x-y plane landscape right */

#define BMA250_XY_PORTRAIT_DOWN (1 << 4) /* x-y plane portrait upside-down */

#define BMA250_XY_PORTRAIT_UP (0 << 4) /* x-y plane portrait upright */

#define BMA250_Z_DOWN (1 << 6) /* z-axis orientation (0=upward) */

enum bma250_register_t

Standard Register Addresses (TWI & SPI)

w/r=write/read, wo=write only, ro=read only

Enumerator
BMA250_CHIP_ID
BMA250_01_RSVD
BMA250_NEW_DATA_X
BMA250_ACC_X
BMA250_NEW_DATA_Y
BMA250_ACC_Y
BMA250_NEW_DATA_Z
BMA250_ACC_Z
BMA250_TEMP
BMA250_INTR_STATUS
BMA250_NEW_DATA_STATUS
BMA250_TAP_SLOPE_STATUS
BMA250_ORIENTATION_STATUS
BMA250_0D_RSVD
BMA250_0E_RSVD
BMA250_G_RANGE
BMA250_BANDWIDTH
BMA250_POWER_MODES
BMA250_12_RSVD
BMA250_DATA_HIGH_BW
BMA250_SOFTRESET
BMA250_15_RSVD
BMA250_16_INTR_EN
BMA250_17_INTR_EN
BMA250_18_RSVD
BMA250_19_INTR_MAP
BMA250_1A_INTR_MAP
BMA250_1B_INTR_MAP
BMA250_1C_RSVD
BMA250_1D_RSVD
BMA250_INTR_DATA_SRC
BMA250_1F_RSVD
BMA250_INTR_PIN_CONFIG
BMA250_INTR_PIN_MODE
BMA250_LOW_G_DURATION
BMA250_LOW_G_THRESHOLD
BMA250_EVENT_HYSTERESIS
BMA250_HIGH_G_DURATION
BMA250_HIGH_G_THRESHOLD
BMA250_SLOPE_DURATION
BMA250_SLOPE_THRESHOLD
BMA250_29_RSVD
BMA250_TAP_TIMING
BMA250_TAP_CONFIG
BMA250_ORIENTATION_CONFIG
BMA250_ORIENTATION_THETA
BMA250_FLAT_THETA
BMA250_FLAT_HOLD_TIME
BMA250_30_RSVD
BMA250_31_RSVD
BMA250_SENSOR_SELF_TEST
BMA250_EEPROM_CONTROL
BMA250_DIGITAL_IO_CONTROL
BMA250_35_RSVD
BMA250_FAST_OFFSET_COMP
BMA250_SLOW_OFFSET_COMP
BMA250_OFFSET_FILT_X
BMA250_OFFSET_FILT_Y
BMA250_OFFSET_FILT_Z
BMA250_OFFSET_UNFILT_X
BMA250_OFFSET_UNFILT_Y
BMA250_OFFSET_UNFILT_Z

bool bma250_init	(	sensor_t *	sensor,
		int	resvd
	)

Bosch BMA250 accelerometer driver initialization.

This is the main initialization function for the BMA250 device.

Parameters

sensor	Address of a sensor device descriptor.
resvd	Reserved value.

Returns: bool true if the call succeeds, else false is returned.

References ARRAYSIZE, band_table, sensor_hal::bandwidth, BMA250_CHIP_ID, BMA250_DATA_RESOLUTION, bma250_event(), BMA250_ID_VAL, bma250_ioctl(), bma250_isr(), BMA250_NEW_DATA_X, bma250_read(), bma250_selftest(), bma250_set_state(), sensor_hal::burst_addr, sensor_hal::bus, sensor_desc::drv, sensor_device_t::func, sensor_desc::hal, sensor_hal::mcu_sigint, sensor_hal::range, range_table, sensor_funcs_t::read, sensor_hal::resolution, sensor_bus_get, SENSOR_CAPS_3_AXIS, SENSOR_CAPS_AUX_TEMP, SENSOR_CAPS_HI_G_EVENT, SENSOR_CAPS_LO_G_EVENT, SENSOR_CAPS_SELFTEST, SENSOR_CAPS_TAP_EVENT, SENSOR_CAPS_TILT_EVENT, sensor_irq_connect(), SENSOR_SCALE_milli, SENSOR_STATE_RESET, SENSOR_UNITS_g0, SENSOR_VENDOR_BOSCH, status, bus_desc_t::status, and STATUS_OK.

Microchip® Advanced Software Framework

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