BMI270 FIFO length always zero

Hi, I have successfully interface BMI270 using I2C protocol. Also I am able to load configuration file.

https://github.com/BoschSensortec/BMI270-Sensor-API

I am referring examples code from above link. I have received various activities like running, walking etc. from this example "\examples\bmi270\step_activity".

I want these two activities "ON_BICYCLE", "IN_VEHICLE". This activity recognition is provided in "bmi270_context" folder.

But I am getting this warning "Warning [1] : FIFO empty". I am referring this example file "activity_recognition".

Please help me to achieve these functionalities.

Thanks in advanced.

 

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