Bosch BMA222 3-axis accelerometer driver.

This file contains functions for initializing and reading data from a Bosch BMA222 3-axis accelerometer.

#include <asf.h>

Macros
#define	BMA222_DATA_RESOLUTION (8) /* signed axis data size (bits) */

#define	BMA222_SPI_MODE (3)

#define	BMA222_TEMP_OFFSET (24) /* temperature center (Celsius) */

#define	BMA222_TWI_ADDR (0x08)

#define	hysteresis_in_g(hysteresis, range) (((threshold) * 4) / (range))
	convert real G values into hysteresis register values More...

#define	threshold_in_g(threshold, range) (((threshold) * 16) / (range))
	convert real G values into register values More...


#define	BMA222_ID_VAL (0x03)
	BMA222 Register Bit Definitions. More...

#define	BMA222_FLAT_INT (1 << 7) /* flat interrupt status */

#define	BMA222_ORIENT_INT (1 << 6) /* orientation interrupt status */

#define	BMA222_S_TAP_INT (1 << 5) /* single tap interrupt status */

#define	BMA222_D_TAP_INT (1 << 4) /* double tap interrupt status */

#define	BMA222_SLOPE_INT (1 << 2) /* slope interrupt status */

#define	BMA222_HIGH_INT (1 << 1) /* high-g interrupt status */

#define	BMA222_LOW_INT (1 << 0) /* low-g interrupt status */

#define	BMA222_DATA_INT (1 << 7) /* new data interrupt status */

#define	BMA222_TAP_SIGN_POS (1 << 7) /* tap interrupt sign (0=negative) */

#define	BMA222_TAP_FIRST_Z (1 << 6) /* z-axis triggered tap interrupt */

#define	BMA222_TAP_FIRST_Y (1 << 5) /* y-axis triggered tap interrupt */

#define	BMA222_TAP_FIRST_X (1 << 4) /* x-axis triggered tap interrupt */

#define	BMA222_SLOPE_SIGN_POS (1 << 3) /* slope interrupt sign (0=negative) */

#define	BMA222_SLOPE_FIRST_Z (1 << 2) /* z-axis triggered slope interrupt */

#define	BMA222_SLOPE_FIRST_Y (1 << 1) /* y-axis triggered slope interrupt */

#define	BMA222_SLOPE_FIRST_X (1 << 0) /* x-axis triggered slope interrupt */

#define	BMA222_FLAT (1 << 7) /* flat condition is fulfilled */

#define	BMA222_Z_DOWN (1 << 6) /* z-axis orientation (0=upward) */

#define	BMA222_XY_PORTRAIT_UP (0 << 4) /* x-y plane portrait upright */

#define	BMA222_XY_PORTRAIT_DOWN (1 << 4) /* x-y plane portrait upside-down */

#define	BMA222_XY_LANDSCAPE_L (2 << 4) /* x-y plane landscape left */

#define	BMA222_XY_LANDSCAPE_R (3 << 4) /* x-y plane landscape right */

#define	BMA222_HIGH_SIGN_NEG

#define	BMA222_HIGH_FIRST_Z (1 << 2) /* z-axis triggered high-g interrupt */

#define	BMA222_HIGH_FIRST_Y (1 << 1) /* y-axis triggered high-g interrupt */

#define	BMA222_HIGH_FIRST_X (1 << 0) /* x-axis triggered high-g interrupt */

#define	BMA222_RANGE_2G (0x03) /* +/- 2g range (default) */

#define	BMA222_RANGE_4G (0x05) /* +/- 4g range */

#define	BMA222_RANGE_8G (0x08) /* +/- 8g range */

#define	BMA222_RANGE_16G (0x0c) /* +/- 16g range */

#define	BMA222_BANDWIDTH_8Hz (0x08) /* 7.81 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_16Hz (0x09) /* 15.63 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_31Hz (0x0a) /* 31.25 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_63Hz (0x0b) /* 62.5 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_125Hz (0x0c) /* 125 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_250Hz (0x0d) /* 250 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_500Hz (0x0e) /* 500 Hz filtered data bandwidth */

#define	BMA222_BANDWIDTH_1000Hz (0x1f) /* 1000 Hz filtered data bandwidth */

#define	BMA222_SUSPEND (1 << 7) /* set suspend mode (0=reset mode) */

#define	BMA222_LOWPOWER_EN (1 << 6) /* set low-power mode (0=reset mode) */

#define	BMA222_SLEEP_DUR_0_5ms (5 << 1) /* 0.5 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_1ms (6 << 1) /* 1 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_2ms (7 << 1) /* 2 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_4ms (8 << 1) /* 4 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_6ms (9 << 1) /* 6 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_10ms (10 << 1) /* 6 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_25ms (11 << 1) /* 25 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_50ms (12 << 1) /* 50 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_100ms (13 << 1) /* 100 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_500ms (14 << 1) /* 500 ms sleep phase duration */

#define	BMA222_SLEEP_DUR_1000ms (15 << 1) /* 1 s sleep phase duration */

#define	BMA222_DATA_UNFILTERED (1 << 7) /* unfiltered data (0=filtered) */

#define	BMA222_RESET (0xb6) /* user-triggered reset write value */

#define	BMA222_FLAT_EN (1 << 7) /* flat interrupt enable */

#define	BMA222_ORIENT_EN (1 << 6) /* orientation interrupt enable */

#define	BMA222_S_TAP_EN (1 << 5) /* single tap interrupt enable */

#define	BMA222_D_TAP_EN (1 << 4) /* double tap interrupt enable */

#define	BMA222_SLOPE_EN_Z (1 << 2) /* z-axis slope interrupt enable */

#define	BMA222_SLOPE_EN_Y (1 << 1) /* y-axis slope interrupt enable */

#define	BMA222_SLOPE_EN_X (1 << 0) /* x-axis slope interrupt enable */

#define	BMA222_DATA_EN (1 << 4) /* new data interrupt enable */

#define	BMA222_LOW_EN (1 << 3) /* low-g interrupt enable */

#define	BMA222_HIGH_EN_Z (1 << 2) /* z-axis high-g interrupt enable */

#define	BMA222_HIGH_EN_Y (1 << 1) /* y-axis high-g interrupt enable */

#define	BMA222_HIGH_EN_X (1 << 0) /* x-axis high-g interrupt enable */

#define	BMA222_INT1_FLAT (1 << 7) /* map flat interrupt to INT1 */

#define	BMA222_INT1_ORIENT (1 << 6) /* map orientation interrupt to INT1 */

#define	BMA222_INT1_S_TAP (1 << 5) /* map single tap interrupt to INT1 */

#define	BMA222_INT1_D_TAP (1 << 4) /* map double tap interrupt to INT1 */

#define	BMA222_INT1_SLOPE (1 << 2) /* map slope interrupt to INT1 */

#define	BMA222_INT1_HIGH (1 << 1) /* map high-g interrupt to INT1 */

#define	BMA222_INT1_LOW (1 << 0) /* map low-g interrupt to INT1 */

#define	BMA222_INT2_DATA (1 << 7) /* map new data interrupt to INT2 */

#define	BMA222_INT1_DATA (1 << 0) /* map new data interrupt to INT1 */

#define	BMA222_INT2_FLAT (1 << 7) /* map flat interrupt to INT2 */

#define	BMA222_INT2_ORIENT (1 << 6) /* map orientation interrupt to INT2 */

#define	BMA222_INT2_S_TAP (1 << 5) /* map single tap interrupt to INT2 */

#define	BMA222_INT2_D_TAP (1 << 4) /* map double tap interrupt to INT2 */

#define	BMA222_INT2_SLOPE (1 << 2) /* map slope interrupt to INT2 */

#define	BMA222_INT2_HIGH (1 << 1) /* map high-g interrupt to INT2 */

#define	BMA222_INT2_LOW (1 << 0) /* map low-g interrupt to INT2 */

#define	BMA222_INT_SRC_DATA (1 << 5) /* unfiltered new data interrupt */

#define	BMA222_INT_SRC_TAP (1 << 4) /* unfiltered s/d tap interrupt data */

#define	BMA222_INT_SRC_SLOPE (1 << 2) /* unfiltered slope interrupt data */

#define	BMA222_INT_SRC_HIGH (1 << 1) /* unfiltered high-g interrupt data */

#define	BMA222_INT_SRC_LOW (1 << 0) /* unfiltered low-g interrupt data */

#define	BMA222_INT2_OD (1 << 3) /* open drive for INT2 pin */

#define	BMA222_INT2_LVL_1 (1 << 2) /* active level 1 for INT2 (default) */

#define	BMA222_INT1_OD (1 << 1) /* open drive for INT1 pin */

#define	BMA222_INT1_LVL_1 (1 << 0) /* active level 1 for INT1 (default) */

#define	BMA222_RESET_INT (0x80) /* reset any latch interrupt */

#define	BMA222_INT_NON_LATCHED (0x00) /* non-latch interrupt (default) */

#define	BMA222_INT_TMP_250ms (0x01) /* 250ms temporary latch interrupt */

#define	BMA222_INT_TMP_500ms (0x02) /* 500ms temporary latch interrupt */

#define	BMA222_INT_TMP_1sec (0x03) /* 1000ms temporary latch interrupt */

#define	BMA222_INT_TMP_2sec (0x04) /* 2000ms temporary latch interrupt */

#define	BMA222_INT_TMP_4sec (0x05) /* 4000ms temporary latch interrupt */

#define	BMA222_INT_TMP_8sec (0x06) /* 8000ms temporary latch interrupt */

#define	BMA222_INT_TMP_500us (0x0a) /* 500us temporary latch interrupt */

#define	BMA222_INT_TMP_1ms (0x0b) /* 1ms temporary latch interrupt */

#define	BMA222_INT_TMP_12_5ms (0x0c) /* 12.5ms temporary latch interrupt */

#define	BMA222_INT_TMP_25ms (0x0d) /* 25ms temporary latch interrupt */

#define	BMA222_INT_TMP_50ms (0x0e) /* 50ms temporary latch interrupt */

#define	BMA222_INT_LATCHED (0x0f) /* latch interrupt mode */

#define	BMA222_TAP_TH_FIELD (0x1f) /* tap interrupt threshold field */
	BMA222_LOW_G_DURATION (0x22) More...

#define	BMA222_TAP_SAMP_FIELD (0xc0) /* tap wake-up samples count field */

#define	BMA222_SELF_TEST_NONE (0x00) /* no self-test (default) */

#define	BMA222_SELF_TEST_AXIS_X (0x01) /* self-test positive x-axis */

#define	BMA222_SELF_TEST_AXIS_Y (0x02) /* self-test positive y-axis */

#define	BMA222_SELF_TEST_AXIS_Z (0x03) /* self-test positive z-axis */

Enumerations
enum	bma222_register_t { BMA222_CHIP_ID = 0, BMA222_01_RSVD, BMA222_NEW_DATA_X, BMA222_ACC_X, BMA222_NEW_DATA_Y, BMA222_ACC_Y, BMA222_NEW_DATA_Z, BMA222_ACC_Z, BMA222_TEMP, BMA222_INTR_STATUS, BMA222_NEW_DATA_STATUS, BMA222_TAP_SLOPE_STATUS, BMA222_ORIENTATION_STATUS, BMA222_0D_RSVD, BMA222_0E_RSVD, BMA222_G_RANGE, BMA222_BANDWIDTH, BMA222_POWER_MODES, BMA222_12_RSVD, BMA222_DATA_HIGH_BW, BMA222_SOFTRESET, BMA222_15_RSVD, BMA222_16_INTR_EN, BMA222_17_INTR_EN, BMA222_18_RSVD, BMA222_19_INTR_MAP, BMA222_1A_INTR_MAP, BMA222_1B_INTR_MAP, BMA222_1C_RSVD, BMA222_1D_RSVD, BMA222_INTR_DATA_SRC, BMA222_1F_RSVD, BMA222_INTR_PIN_CONFIG, BMA222_INTR_PIN_MODE, BMA222_LOW_G_DURATION, BMA222_LOW_G_THRESHOLD, BMA222_EVENT_HYSTERESIS, BMA222_HIGH_G_DURATION, BMA222_HIGH_G_THRESHOLD, BMA222_SLOPE_DURATION, BMA222_SLOPE_THRESHOLD, BMA222_29_RSVD, BMA222_TAP_TIMING, BMA222_TAP_CONFIG, BMA222_ORIENTATION_CONFIG, BMA222_ORIENTATION_THETA, BMA222_FLAT_THETA, BMA222_FLAT_HOLD_TIME, BMA222_30_RSVD, BMA222_31_RSVD, BMA222_SENSOR_SELF_TEST, BMA222_EEPROM_CONTROL, BMA222_DIGITAL_IO_CONTROL, BMA222_35_RSVD, BMA222_FAST_OFFSET_COMP, BMA222_SLOW_OFFSET_COMP, BMA222_OFFSET_FILT_X, BMA222_OFFSET_FILT_Y, BMA222_OFFSET_FILT_Z, BMA222_OFFSET_UNFILT_X, BMA222_OFFSET_UNFILT_Y, BMA222_OFFSET_UNFILT_Z }

Functions
bool	bma222_init (sensor_t *, int)
	Bosch BMA222 accelerometer driver initialization. More...

#define BMA222_BANDWIDTH_1000Hz (0x1f) /* 1000 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_125Hz (0x0c) /* 125 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_16Hz (0x09) /* 15.63 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_250Hz (0x0d) /* 250 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_31Hz (0x0a) /* 31.25 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_500Hz (0x0e) /* 500 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_63Hz (0x0b) /* 62.5 Hz filtered data bandwidth */

#define BMA222_BANDWIDTH_8Hz (0x08) /* 7.81 Hz filtered data bandwidth */

#define BMA222_D_TAP_EN (1 << 4) /* double tap interrupt enable */

Referenced by bma222_event().

#define BMA222_D_TAP_INT (1 << 4) /* double tap interrupt status */

#define BMA222_DATA_EN (1 << 4) /* new data interrupt enable */

Referenced by bma222_event().

#define BMA222_DATA_INT (1 << 7) /* new data interrupt status */

#define BMA222_DATA_RESOLUTION (8) /* signed axis data size (bits) */

Referenced by bma222_init().

#define BMA222_DATA_UNFILTERED (1 << 7) /* unfiltered data (0=filtered) */

#define BMA222_FLAT (1 << 7) /* flat condition is fulfilled */

#define BMA222_FLAT_EN (1 << 7) /* flat interrupt enable */

#define BMA222_FLAT_INT (1 << 7) /* flat interrupt status */

#define BMA222_HIGH_EN_X (1 << 0) /* x-axis high-g interrupt enable */

Referenced by bma222_event().

#define BMA222_HIGH_EN_Y (1 << 1) /* y-axis high-g interrupt enable */

Referenced by bma222_event().

#define BMA222_HIGH_EN_Z (1 << 2) /* z-axis high-g interrupt enable */

Referenced by bma222_event().

#define BMA222_HIGH_FIRST_X (1 << 0) /* x-axis triggered high-g interrupt */

#define BMA222_HIGH_FIRST_Y (1 << 1) /* y-axis triggered high-g interrupt */

#define BMA222_HIGH_FIRST_Z (1 << 2) /* z-axis triggered high-g interrupt */

#define BMA222_HIGH_INT (1 << 1) /* high-g interrupt status */

#define BMA222_HIGH_SIGN_NEG

Value:

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

* (0=positive) */

#define BMA222_ID_VAL (0x03)

BMA222 Register Bit Definitions.

Referenced by bma222_init().

#define BMA222_INT1_D_TAP (1 << 4) /* map double tap interrupt to INT1 */

#define BMA222_INT1_DATA (1 << 0) /* map new data interrupt to INT1 */

#define BMA222_INT1_FLAT (1 << 7) /* map flat interrupt to INT1 */

#define BMA222_INT1_HIGH (1 << 1) /* map high-g interrupt to INT1 */

#define BMA222_INT1_LOW (1 << 0) /* map low-g interrupt to INT1 */

#define BMA222_INT1_LVL_1 (1 << 0) /* active level 1 for INT1 (default) */

#define BMA222_INT1_OD (1 << 1) /* open drive for INT1 pin */

#define BMA222_INT1_ORIENT (1 << 6) /* map orientation interrupt to INT1 */

#define BMA222_INT1_S_TAP (1 << 5) /* map single tap interrupt to INT1 */

#define BMA222_INT1_SLOPE (1 << 2) /* map slope interrupt to INT1 */

#define BMA222_INT2_D_TAP (1 << 4) /* map double tap interrupt to INT2 */

#define BMA222_INT2_DATA (1 << 7) /* map new data interrupt to INT2 */

#define BMA222_INT2_FLAT (1 << 7) /* map flat interrupt to INT2 */

#define BMA222_INT2_HIGH (1 << 1) /* map high-g interrupt to INT2 */

#define BMA222_INT2_LOW (1 << 0) /* map low-g interrupt to INT2 */

#define BMA222_INT2_LVL_1 (1 << 2) /* active level 1 for INT2 (default) */

#define BMA222_INT2_OD (1 << 3) /* open drive for INT2 pin */

#define BMA222_INT2_ORIENT (1 << 6) /* map orientation interrupt to INT2 */

#define BMA222_INT2_S_TAP (1 << 5) /* map single tap interrupt to INT2 */

#define BMA222_INT2_SLOPE (1 << 2) /* map slope interrupt to INT2 */

#define BMA222_INT_LATCHED (0x0f) /* latch interrupt mode */

#define BMA222_INT_NON_LATCHED (0x00) /* non-latch interrupt (default) */

#define BMA222_INT_SRC_DATA (1 << 5) /* unfiltered new data interrupt */

#define BMA222_INT_SRC_HIGH (1 << 1) /* unfiltered high-g interrupt data */

#define BMA222_INT_SRC_LOW (1 << 0) /* unfiltered low-g interrupt data */

#define BMA222_INT_SRC_SLOPE (1 << 2) /* unfiltered slope interrupt data */

#define BMA222_INT_SRC_TAP (1 << 4) /* unfiltered s/d tap interrupt data */

#define BMA222_INT_TMP_12_5ms (0x0c) /* 12.5ms temporary latch interrupt */

#define BMA222_INT_TMP_1ms (0x0b) /* 1ms temporary latch interrupt */

#define BMA222_INT_TMP_1sec (0x03) /* 1000ms temporary latch interrupt */

#define BMA222_INT_TMP_250ms (0x01) /* 250ms temporary latch interrupt */

#define BMA222_INT_TMP_25ms (0x0d) /* 25ms temporary latch interrupt */

#define BMA222_INT_TMP_2sec (0x04) /* 2000ms temporary latch interrupt */

#define BMA222_INT_TMP_4sec (0x05) /* 4000ms temporary latch interrupt */

#define BMA222_INT_TMP_500ms (0x02) /* 500ms temporary latch interrupt */

#define BMA222_INT_TMP_500us (0x0a) /* 500us temporary latch interrupt */

#define BMA222_INT_TMP_50ms (0x0e) /* 50ms temporary latch interrupt */

#define BMA222_INT_TMP_8sec (0x06) /* 8000ms temporary latch interrupt */

#define BMA222_LOW_EN (1 << 3) /* low-g interrupt enable */

Referenced by bma222_event().

#define BMA222_LOW_INT (1 << 0) /* low-g interrupt status */

#define BMA222_LOWPOWER_EN (1 << 6) /* set low-power mode (0=reset mode) */

Referenced by bma222_sleep_en().

#define BMA222_ORIENT_EN (1 << 6) /* orientation interrupt enable */

#define BMA222_ORIENT_INT (1 << 6) /* orientation interrupt status */

#define BMA222_RANGE_16G (0x0c) /* +/- 16g range */

#define BMA222_RANGE_2G (0x03) /* +/- 2g range (default) */

#define BMA222_RANGE_4G (0x05) /* +/- 4g range */

#define BMA222_RANGE_8G (0x08) /* +/- 8g range */

#define BMA222_RESET (0xb6) /* user-triggered reset write value */

Referenced by bma222_set_state().

#define BMA222_RESET_INT (0x80) /* reset any latch interrupt */

#define BMA222_S_TAP_EN (1 << 5) /* single tap interrupt enable */

Referenced by bma222_event().

#define BMA222_S_TAP_INT (1 << 5) /* single tap interrupt status */

#define BMA222_SELF_TEST_AXIS_X (0x01) /* self-test positive x-axis */

#define BMA222_SELF_TEST_AXIS_Y (0x02) /* self-test positive y-axis */

#define BMA222_SELF_TEST_AXIS_Z (0x03) /* self-test positive z-axis */

#define BMA222_SELF_TEST_NONE (0x00) /* no self-test (default) */

#define BMA222_SLEEP_DUR_0_5ms (5 << 1) /* 0.5 ms sleep phase duration */

#define BMA222_SLEEP_DUR_1000ms (15 << 1) /* 1 s sleep phase duration */

#define BMA222_SLEEP_DUR_100ms (13 << 1) /* 100 ms sleep phase duration */

#define BMA222_SLEEP_DUR_10ms (10 << 1) /* 6 ms sleep phase duration */

#define BMA222_SLEEP_DUR_1ms (6 << 1) /* 1 ms sleep phase duration */

Referenced by bma222_sleep_en().

#define BMA222_SLEEP_DUR_25ms (11 << 1) /* 25 ms sleep phase duration */

#define BMA222_SLEEP_DUR_2ms (7 << 1) /* 2 ms sleep phase duration */

#define BMA222_SLEEP_DUR_4ms (8 << 1) /* 4 ms sleep phase duration */

#define BMA222_SLEEP_DUR_500ms (14 << 1) /* 500 ms sleep phase duration */

#define BMA222_SLEEP_DUR_50ms (12 << 1) /* 50 ms sleep phase duration */

#define BMA222_SLEEP_DUR_6ms (9 << 1) /* 6 ms sleep phase duration */

#define BMA222_SLOPE_EN_X (1 << 0) /* x-axis slope interrupt enable */

Referenced by bma222_event().

#define BMA222_SLOPE_EN_Y (1 << 1) /* y-axis slope interrupt enable */

Referenced by bma222_event().

#define BMA222_SLOPE_EN_Z (1 << 2) /* z-axis slope interrupt enable */

Referenced by bma222_event().

#define BMA222_SLOPE_FIRST_X (1 << 0) /* x-axis triggered slope interrupt */

#define BMA222_SLOPE_FIRST_Y (1 << 1) /* y-axis triggered slope interrupt */

#define BMA222_SLOPE_FIRST_Z (1 << 2) /* z-axis triggered slope interrupt */

#define BMA222_SLOPE_INT (1 << 2) /* slope interrupt status */

#define BMA222_SLOPE_SIGN_POS (1 << 3) /* slope interrupt sign (0=negative) */

#define BMA222_SPI_MODE (3)

#define BMA222_SUSPEND (1 << 7) /* set suspend mode (0=reset mode) */

Referenced by bma222_set_state().

#define BMA222_TAP_FIRST_X (1 << 4) /* x-axis triggered tap interrupt */

#define BMA222_TAP_FIRST_Y (1 << 5) /* y-axis triggered tap interrupt */

#define BMA222_TAP_FIRST_Z (1 << 6) /* z-axis triggered tap interrupt */

#define BMA222_TAP_SAMP_FIELD (0xc0) /* tap wake-up samples count field */

#define BMA222_TAP_SIGN_POS (1 << 7) /* tap interrupt sign (0=negative) */

#define BMA222_TAP_TH_FIELD (0x1f) /* tap interrupt threshold field */

BMA222_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. BMA222_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 bma222_get_threshold(), and bma222_set_threshold().

#define BMA222_TEMP_OFFSET (24) /* temperature center (Celsius) */

Referenced by bma222_get_temperature().

#define BMA222_TWI_ADDR (0x08)

#define BMA222_XY_LANDSCAPE_L (2 << 4) /* x-y plane landscape left */

#define BMA222_XY_LANDSCAPE_R (3 << 4) /* x-y plane landscape right */

#define BMA222_XY_PORTRAIT_DOWN (1 << 4) /* x-y plane portrait upside-down */

#define BMA222_XY_PORTRAIT_UP (0 << 4) /* x-y plane portrait upright */

#define BMA222_Z_DOWN (1 << 6) /* z-axis orientation (0=upward) */

#define hysteresis_in_g	(	hysteresis,
		range
	)	(((threshold) * 4) / (range))

convert real G values into hysteresis register values

Note: no range checking is included

#define threshold_in_g	(	threshold,
		range
	)	(((threshold) * 16) / (range))

convert real G values into register values

Note: no range checking is included

enum bma222_register_t

Enumerator
BMA222_CHIP_ID
BMA222_01_RSVD
BMA222_NEW_DATA_X
BMA222_ACC_X
BMA222_NEW_DATA_Y
BMA222_ACC_Y
BMA222_NEW_DATA_Z
BMA222_ACC_Z
BMA222_TEMP
BMA222_INTR_STATUS
BMA222_NEW_DATA_STATUS
BMA222_TAP_SLOPE_STATUS
BMA222_ORIENTATION_STATUS
BMA222_0D_RSVD
BMA222_0E_RSVD
BMA222_G_RANGE
BMA222_BANDWIDTH
BMA222_POWER_MODES
BMA222_12_RSVD
BMA222_DATA_HIGH_BW
BMA222_SOFTRESET
BMA222_15_RSVD
BMA222_16_INTR_EN
BMA222_17_INTR_EN
BMA222_18_RSVD
BMA222_19_INTR_MAP
BMA222_1A_INTR_MAP
BMA222_1B_INTR_MAP
BMA222_1C_RSVD
BMA222_1D_RSVD
BMA222_INTR_DATA_SRC
BMA222_1F_RSVD
BMA222_INTR_PIN_CONFIG
BMA222_INTR_PIN_MODE
BMA222_LOW_G_DURATION
BMA222_LOW_G_THRESHOLD
BMA222_EVENT_HYSTERESIS
BMA222_HIGH_G_DURATION
BMA222_HIGH_G_THRESHOLD
BMA222_SLOPE_DURATION
BMA222_SLOPE_THRESHOLD
BMA222_29_RSVD
BMA222_TAP_TIMING
BMA222_TAP_CONFIG
BMA222_ORIENTATION_CONFIG
BMA222_ORIENTATION_THETA
BMA222_FLAT_THETA
BMA222_FLAT_HOLD_TIME
BMA222_30_RSVD
BMA222_31_RSVD
BMA222_SENSOR_SELF_TEST
BMA222_EEPROM_CONTROL
BMA222_DIGITAL_IO_CONTROL
BMA222_35_RSVD
BMA222_FAST_OFFSET_COMP
BMA222_SLOW_OFFSET_COMP
BMA222_OFFSET_FILT_X
BMA222_OFFSET_FILT_Y
BMA222_OFFSET_FILT_Z
BMA222_OFFSET_UNFILT_X
BMA222_OFFSET_UNFILT_Y
BMA222_OFFSET_UNFILT_Z

bool bma222_init	(	sensor_t *	sensor,
		int	resvd
	)

Bosch BMA222 accelerometer driver initialization.

This is the main initialization function for the BMA222 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, BMA222_CHIP_ID, BMA222_DATA_RESOLUTION, bma222_event(), BMA222_ID_VAL, bma222_ioctl(), bma222_isr(), BMA222_NEW_DATA_X, bma222_read(), bma222_selftest(), bma222_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

Macros

Enumerations

Functions