How to analyze the data of BMI270

[Eason]

Hallo everyone

I have obtained the originaldata from BMI270, but  these data are not processed. How to convert these data into data with standard units. For example: m/s^2  (accelerometer) and rad/s (gyroscope).

Thank you very much.

Accel_x	Accel_y	Accel_z	Gyr_x	Gyr_y	Gyr_z
19	-426	16660	1	4	1
10	-421	16646	1	4	1
2	-438	16671	2	3	1
205	-580	16675	0	3	-22
-818	889	17469	131	-537	-128
2022	-591	16579	333	-937	78
3457	1511	17143	961	-97	177
2104	4447	15315	849	173	-113
-113	6224	15604	383	880	5
-1441	4980	15571	-276	1401	-454
-3889	4206	14484	-785	900	-792
-6001	772	16052	-1714	-758	-587
-3700	-402	16576	-1230	-909	-234
-3414	-3738	17029	-896	-1380	127
1718	-2842	16151	836	-904	189
2032	787	18560	1090	-179	217

[BSTRobin · Accepted solution]

Hello Eason,

There were example code in github.

For accelerometer,  you could example file "https://github.com/BoschSensortec/BMI270-Sensor-API/blob/master/examples/bmi270/accel/accel.c".

/*!
* @brief This function converts lsb to meter per second squared for 16 bit accelerometer at
* range 2G, 4G, 8G or 16G.
*/
static float lsb_to_mps2(int16_t val, float g_range, uint8_t bit_width)
{
float half_scale = ((float)(1 << bit_width) / 2.0f);

return (GRAVITY_EARTH * val * g_range) / half_scale;
}

For gyroscope, you could example file "https://github.com/BoschSensortec/BMI270-Sensor-API/blob/master/examples/bmi270/gyro/gyro.c".

/*!
* @brief This function converts lsb to degree per second for 16 bit gyro at
* range 125, 250, 500, 1000 or 2000dps.
*/
static float lsb_to_dps(int16_t val, float dps, uint8_t bit_width)
{
float half_scale = ((float)(1 << bit_width) / 2.0f);

return (dps / ((half_scale) + BMI2_GYR_RANGE_2000)) * (val);
}