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Release_BMA400_bma400_v1.5.9_update_v1.5.9 #11

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4 changes: 2 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# BMA400 Sensor API
# BMA400 SensorAPI

> Bosch Sensortec's BMA400 accelerometer sensor API
> Bosch Sensortec's BMA400 accelerometer SensorAPI

## Sensor Overview
The BMA400 is the first real ultra-low power acceleration sensor that minimizes power consumption without compromising on performance. Featuring 12-bit digital resolution, continuous measurement and a defined selectable bandwidth combined with ultra-low power the BMA400 allows low-noise measurement of accelerations in three perpendicular axes. The BMA400 thus senses tilt, orientation, tab/double tab, and enables plug 'n' play step counting with activity recognition especially suited for wearable devices which need a long-lasting battery lifetime.
Expand Down
20 changes: 9 additions & 11 deletions bma400.c
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Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bma400.c
* @date 2020-06-05
* @version v1.5.8
* @date 2021-02-22
* @version v1.5.9
*
*/

Expand Down Expand Up @@ -510,7 +510,7 @@ static int8_t read_fifo(struct bma400_fifo_data *fifo, struct bma400_dev *dev);
* @return Nothing
*/
static void unpack_accel_frame(struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *frame_count,
const struct bma400_dev *dev);

Expand Down Expand Up @@ -544,7 +544,7 @@ static void check_frame_available(const struct bma400_fifo_data *fifo,
* @return Nothing
*/
static void unpack_accel(const struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *data_index,
uint8_t accel_width,
uint8_t frame_header);
Expand Down Expand Up @@ -728,24 +728,22 @@ int8_t bma400_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, struct
{
int8_t rslt;
uint16_t index;
uint8_t temp_buff[BMA400_MAX_LEN];

/* Check for null pointer in the device structure */
rslt = null_ptr_check(dev);

/* Proceed if null check is fine */
if ((rslt == BMA400_OK) && (reg_data != NULL))
{
uint32_t temp_len = len + dev->dummy_byte;
uint8_t temp_buff[temp_len];

if (dev->intf != BMA400_I2C_INTF)
{
/* If interface selected is SPI */
reg_addr = reg_addr | BMA400_SPI_RD_MASK;
}

/* Read the data from the reg_addr */
dev->intf_rslt = dev->read(reg_addr, temp_buff, temp_len, dev->intf_ptr);
dev->intf_rslt = dev->read(reg_addr, temp_buff, (len + dev->dummy_byte), dev->intf_ptr);
if (dev->intf_rslt == BMA400_INTF_RET_SUCCESS)
{
for (index = 0; index < len; index++)
Expand Down Expand Up @@ -1394,7 +1392,7 @@ int8_t bma400_get_fifo_data(struct bma400_fifo_data *fifo, struct bma400_dev *de
}

int8_t bma400_extract_accel(struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *frame_count,
const struct bma400_dev *dev)
{
Expand Down Expand Up @@ -3050,7 +3048,7 @@ static int8_t read_fifo(struct bma400_fifo_data *fifo, struct bma400_dev *dev)
}

static void unpack_accel_frame(struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *frame_count,
const struct bma400_dev *dev)
{
Expand Down Expand Up @@ -3302,7 +3300,7 @@ static void check_frame_available(const struct bma400_fifo_data *fifo,
}

static void unpack_accel(const struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *data_index,
uint8_t accel_width,
uint8_t frame_header)
Expand Down
10 changes: 5 additions & 5 deletions bma400.h
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Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bma400.h
* @date 2020-06-05
* @version v1.5.8
* @date 2021-02-22
* @version v1.5.9
*
*/

Expand Down Expand Up @@ -326,7 +326,7 @@ int8_t bma400_get_fifo_data(struct bma400_fifo_data *fifo, struct bma400_dev *de
* \ingroup bma400ApiFifo
* \page bma400_api_bma400_extract_accel bma400_extract_accel
* \code
* int8_t bma400_extract_accel(struct bma400_fifo_data *fifo, struct bma400_sensor_data *accel_data,
* int8_t bma400_extract_accel(struct bma400_fifo_data *fifo, struct bma400_fifo_sensor_data *accel_data,
* uint16_t *frame_count, const struct bma400_dev *dev);
* \endcode
* @details This API parses and extracts the accelerometer frames, FIFO time
Expand All @@ -339,7 +339,7 @@ int8_t bma400_get_fifo_data(struct bma400_fifo_data *fifo, struct bma400_dev *de
*
* @param[in,out] fifo : Pointer to the FIFO structure.
*
* @param[out] accel_data : Structure instance of bma400_sensor_data where
* @param[out] accel_data : Structure instance of bma400_fifo_sensor_data where
* the accelerometer data from FIFO is extracted
* and stored after calling this API
*
Expand All @@ -355,7 +355,7 @@ int8_t bma400_get_fifo_data(struct bma400_fifo_data *fifo, struct bma400_dev *de
* @retval -ve value -> Error
*/
int8_t bma400_extract_accel(struct bma400_fifo_data *fifo,
struct bma400_sensor_data *accel_data,
struct bma400_fifo_sensor_data *accel_data,
uint16_t *frame_count,
const struct bma400_dev *dev);

Expand Down
24 changes: 21 additions & 3 deletions bma400_defs.h
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Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bma400_defs.h
* @date 2020-06-05
* @version v1.5.8
* @date 2021-02-22
* @version v1.5.9
*
*/

Expand Down Expand Up @@ -121,6 +121,9 @@
#define BMA400_I2C_ADDRESS_SDO_LOW UINT8_C(0x14)
#define BMA400_I2C_ADDRESS_SDO_HIGH UINT8_C(0x15)

/* Maximum read length */
#define BMA400_MAX_LEN UINT8_C(128)

/* Power mode configurations */
#define BMA400_MODE_NORMAL UINT8_C(0x02)
#define BMA400_MODE_SLEEP UINT8_C(0x00)
Expand Down Expand Up @@ -430,7 +433,7 @@

/* BMA400 FIFO data masks */
#define BMA400_FIFO_HEADER_MASK UINT8_C(0x3E)
#define BMA400_FIFO_BYTES_OVERREAD UINT8_C(25)
#define BMA400_FIFO_BYTES_OVERREAD UINT8_C(100)
#define BMA400_AWIDTH_MASK UINT8_C(0xEF)
#define BMA400_FIFO_DATA_EN_MASK UINT8_C(0x0E)

Expand Down Expand Up @@ -1296,6 +1299,21 @@ struct bma400_sensor_data
uint32_t sensortime;
};

/*
* BMA400 sensor data for FIFO
*/
struct bma400_fifo_sensor_data
{
/* X-axis sensor data */
int16_t x;

/* Y-axis sensor data */
int16_t y;

/* Z-axis sensor data */
int16_t z;
};

/*
* BMA400 interrupt selection
*/
Expand Down
66 changes: 40 additions & 26 deletions examples/accelerometer/accelerometer.c
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Expand Up @@ -5,24 +5,48 @@
*
*/

/*!
* @ingroup bma400Examples
* @defgroup bma400ExamplesAccelerometer Accelerometer read
* @brief To read accelerometer xyz data for defined range and ODR
* \include accelerometer.c
*/

#include <stdio.h>
#include "bma400.h"
#include "common.h"

/************************************************************************/
/********* Macros *************/
/************************************************************************/

/* Earth's gravity in m/s^2 */
#define GRAVITY_EARTH (9.80665f)

/* 39.0625us per tick */
#define SENSOR_TICK_TO_S (0.0000390625f)

static float lsb_to_ms2(int16_t accel_data, uint8_t g_range, uint8_t bit_width);
/************************************************************************/
/********* Static APIs *************/
/************************************************************************/

/*!
* @brief This internal API converts raw sensor values(LSB) to meters per seconds square.
*
* @param[in] accel_data : Raw sensor value.
* @param[in] g_range : Accel Range selected (2G, 4G, 8G, 16G).
* @param[in] bit_width : Resolution of the sensor.
*
* @return Accel values in meters per second square.
*
*/
static float lsb_to_ms2(int16_t accel_data, uint8_t g_range, uint8_t bit_width)
{
float accel_ms2;
int16_t half_scale;

half_scale = 1 << (bit_width - 1);
accel_ms2 = (GRAVITY_EARTH * accel_data * g_range) / half_scale;

return accel_ms2;
}

/************************************************************************/
/********* Main Function *************/
/************************************************************************/

int main(int argc, char const *argv[])
{
Expand All @@ -39,15 +63,15 @@ int main(int argc, char const *argv[])
* For I2C : BMA400_I2C_INTF
* For SPI : BMA400_SPI_INTF
*/
rslt = bma400_interface_init(&bma, BMA400_SPI_INTF);
rslt = bma400_interface_init(&bma, BMA400_I2C_INTF);
bma400_check_rslt("bma400_interface_init", rslt);

rslt = bma400_soft_reset(&bma);
bma400_check_rslt("bma400_soft_reset", rslt);

rslt = bma400_init(&bma);
bma400_check_rslt("bma400_init", rslt);

rslt = bma400_soft_reset(&bma);
bma400_check_rslt("bma400_soft_reset", rslt);

/* Select the type of configuration to be modified */
conf.type = BMA400_ACCEL;

Expand Down Expand Up @@ -94,7 +118,8 @@ int main(int argc, char const *argv[])
z = lsb_to_ms2(data.z, 2, 12);
t = (float)data.sensortime * SENSOR_TICK_TO_S;

printf("Gravity-x : %.2f, Gravity-y : %.2f, Gravity-z : %.2f, t(s) : %.4f\r\n", x, y, z, t);
printf("Acc_Raw_X : %d Acc_Raw_Y : %d Acc_Raw_Z : %d", data.x, data.y, data.z);
printf("\tAcc_ms2_X : %.2f, Acc_ms2_Y : %.2f, Acc_ms2_Z : %.2f, t(s) : %.4f\n", x, y, z, t);
n_samples--;
}
}
Expand All @@ -120,7 +145,8 @@ int main(int argc, char const *argv[])
y = lsb_to_ms2(data.y, 2, 12);
z = lsb_to_ms2(data.z, 2, 12);

printf("Gravity-x : %.2f, Gravity-y : %.2f, Gravity-z : %.2f\r\n", x, y, z);
printf("Acc_Raw_X : %d Acc_Raw_Y : %d Acc_Raw_Z : %d", data.x, data.y, data.z);
printf("\tAcc_ms2_X : %.2f, Acc_ms2_Y : %.2f, Acc_ms2_Z : %.2f\n", x, y, z);
n_samples--;
}
}
Expand All @@ -129,15 +155,3 @@ int main(int argc, char const *argv[])

return rslt;
}

static float lsb_to_ms2(int16_t accel_data, uint8_t g_range, uint8_t bit_width)
{
float accel_ms2;
int16_t half_scale;

half_scale = 1 << (bit_width - 1);
accel_ms2 = (GRAVITY_EARTH * accel_data * g_range) / half_scale;

return accel_ms2;

}
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