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    BM270: Gyroscope Data Post-Processing

    Member

    BM270: Gyroscope Data Post-Processing

    The BMI270 datasheet rev1.0.05 2019 on page 32 (ref https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMI270-DS000.pdf ) details Gyroscope Data Post-Processing that should be applied to the X axis with this formula:

    RateX = ValueX – GyrCas * ValueZ / 512

    In the chips I’ve tried GyrCas is always 0, meaning this formula is redundant. GyrCas being feature register 0x3C on features page 0.

    So have I done something wrong when reading GyrCas, or is there some calibration sequence I need to perform to get GyrCas set to something other than zero? The datasheet says the reset value is 0, so does this ever change?

    Thanks!

    2 REPLIES 2
    Community Moderator

    Re: BM270: Gyroscope Data Post-Processing

    Hi  _Richard_,

    Have you already loaded the configuration file in to the BMI270? If so, how long do you wait before you read out the GYR_CAS value?

    Regards,
    kgoveas

     

     

    Member

    Re: BM270: Gyroscope Data Post-Processing

    Thanks kgoveas!

    Sending the configuration file and waiting for init complete before attempting to read GyrCas fixed the problem.  Now I see GyrCas = 3 in my test chip 🙂

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