BHI160 Calibration of Gyro and Magnetometer issue

[Saicharan]

Hi team,

I use MAX78000  to interface the BHI160B IC and for calibration of the IMU sensor I use the following example https://github.com/boschsensortec/BHy1_driver_and_MCU_solution/blob/master/examples/calib_profile_ex...

I can calibrate the accelerometer but have problems with the magnetometer and gyroscope as the accuracy value does not change from 0.
The calibration procedure I used is referred to in the below video.
https://www.youtube.com/watch?v=Bw0WuAyGsnY

can anyone give me a hint as to what the problem might be?

Thanks in advance

Saicharan

[BSTRobin · Accepted solution]

Hi Saicharan,

I upload example on STM32F4 for your reference, which based on BHI160B sensor API https://github.com/boschsensortec/BHy1_driver_and_MCU_solution/tree/master
Eanble the macro definition in user_define.h
#define USE_BHI160
#define BHI160_BMM150_9DOF

Eanble virtual sensor IDs VS_TYPE_ACCELEROMETER, VS_TYPE_GYROSCOPE, VS_TYPE_GEOMAGNETIC_FIELD and get calibration profile & accuracy in callback function sensors_callback_acc_gyro_mag().

[Saicharan]

Hi BSTRobin,

I have tried the above code, Now I can calibrate Acc and Gyro but the magnetometer calibration accuracy values change from 1,2,3 then again to zero.
is there anything we need to enable or disable?

[Saicharan]

Hi BSTRobin,

The calibration values are lost during the power cycle. is there any possibility of storing the calibration parameters and rewriting them to the device on every power on? 

Thanks 
G Saicharan