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About _Richard_
since
10-14-2019
01-07-2020
_Richard_
Member
7
Posts
3
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1
Solution
01-07-2020
12:33 AM
1 Like
Hi shellywang, Thanks for your questions --- these prompted me to review our calibration methods and also to ensure we performed a soft reset of the BMI270 before performing the calibration. I'm pleased to say it seems to be working reliably now. Thanks, Richard.
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12-17-2019
04:20 AM
Hi, Sometimes during motionless SENS error compensation (CRT) we encounter a "dl_err". Could you please explain what causes this and how we can either avoid it or recover and continue with calibration? Thanks! Richard.
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11-29-2019
12:32 AM
Hi, Where are the compensation values are placed after a successful CRT run? I ask in order to: 1) Prove CRT did something (I'd print the values in our debug log) 2) At power on show NVM has restored them And is there any register setting I need to do to instruct the gyro to use the CRT values? I ask because "Manual SENS Error Compensation" lists a bunch of steps, but I don't see anything for the "automatic" one. BTW - I am are using my own driver and appeared to keep getting "precon" error until I disabled the FIFO. The steps to perform CRT listed in BST-BMI270-DS000-02 Revision_1.0_05 2019 forget to mention this. Thanks! Richard.
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10-17-2019
04:19 AM
2 Likes
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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10-15-2019
04:09 AM
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!
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