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    BMI270 FIFO length always zero

    sos
    New Poster

    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".

    Move the board for activity recognition for 30 sec :
    Fifo length = 0
    Requested FIFO data frames : 5
    Warning [1] : FIFO empty
    Parsed FIFO data frames : 0

    I received this output on serial terminal.

    Code is entering in to while loop but not entering in below for loop because value of act_frames received is 0.

    if (rslt == BMI2_OK)
    {
    /* Update FIFO structure */
    fifoframe.data = fifo_data;
    fifoframe.length = 516;

    rslt = bmi2_get_fifo_length(&fifo_length, &bmi2_dev);
    printf("Fifo length = %d \n", fifo_length);

    /* Read FIFO data */
    rslt = bmi2_read_fifo_data(&fifoframe, &bmi2_dev);
    bmi2_error_codes_print_result(rslt);

    while (rslt != BMI2_W_FIFO_EMPTY)
    {
    /* Provide the number of frames to be read */
    act_frames = 5;

    printf("Requested FIFO data frames : %d\n", act_frames);

    /* Get the activity output */
    rslt = bmi270_context_get_act_recog_output(act_recog_data, &act_frames, &fifoframe, &bmi2_dev);
    bmi2_error_codes_print_result(rslt);

    printf("Parsed FIFO data frames : %d\r\n", act_frames);

    for (count = 0; count < act_frames; count++)
    {
    printf(
    "Activity Recognition output[%d]:Sensor time: %d\t Previous activity: %s\t current: %s\n",
    count,
    act_recog_data[count].time_stamp,
    activity_reg_output[act_recog_data[count].prev_act],
    activity_reg_output[act_recog_data[count].curr_act]);
    }
    }
    }

    Please help me to achieve these functionalities.

    Thanks in advanced.

    1 REPLY 1
    BSTRobin
    Community Moderator

    Re: BMI270 FIFO length always zero

    Hello sos,

    What is you detailed configuration?

    1.ODR?

    2.Enable ACC ,GYRO, or ACC & GYRO?

    3. Power mode?

    4. FIFO configuration?

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