About SLibe

SLibe · 2022-05-30

Between two batches of ISM330DHCX and LSM6DSR sensors (first batch purchased in 2020, second batch purchased in 2021), large differences in gyro sensitivity are seen. For a single 90 degree turn, the first batch exhibits several degrees of error - a...

SLibe · 2022-03-21

We are using Motion_AC to calibrate Accelerometer Offset & Scale, and Motion_GC to calibrate Gyro Offset. However, we have found a need for also correcting the Gyro Scale. We work with the LSM6DSM and ISM330DHCX sensors. We found that within a par...

SLibe · 2021-05-07

Is there any documentation on the differences? Are these two part numbers functionally identical?

SLibe · 2021-02-18

In working with the MotionAC Library, I have the following questions to better understand behaviors.1) We wish to create a Graphical User Interface which indicates the status of the "dynamic" or 6-point tumble calibration, and want to display current...

SLibe · 2021-02-16

The MotionFX Library is initialized as follows: MotionFX_getKnobs(&iKnobs); /* Modify knobs settings */ // Configure knobs with non-default values iKnobs.output_type = MFX_ENGINE_OUTPUT_ENU; iKnobs.modx = 1; // No decimation iKnobs.ATime = 10; // ka...

SLibe · 2022-06-03

Gyro zero rate level is calibrated continuously in firmware using the MotionGC Library; when unit is still, after bias removal the gyro rate is zero for all 3 gyro axes; we can see the MotionGC bias is being updated several times a second.The gyro (a...

SLibe · 2021-03-17

HI @Eleon BORLINI We will begin work to use MotionGC, and MotionFX LMode=0 to achieve higher 6-axis yaw accuracy.However (a) because the existing MotionFX gyro calibration is a "black box" to us, and (b) because we do not understand clearly why Mot...

SLibe · 2021-03-13

Hi @Eleon BORLINI ,1) The ODR has been modified to 104Hz, as you suggested; this appears to slightly improve the ISM330DHCX yaw angle accuracy - sometimes.2) Also, we found that the LSM6DSM data previously reported was not correct, because while the...

SLibe · 2021-03-08

Hi @Eleon BORLINI ,The accelerometer offset correction is now implemented (via X_OFS_USR/Y_OFS_USR/Z_OFS_USR registers)The MotionAC accelerometer calibration is also now implemented.As suggested, we have run testing on 4 different devices from our p...

SLibe · 2021-03-02

Hi @Eleon BORLINI , Yes, if you want to follow up on the MotionAC question in the other post, please do so.For the MotionFX error when rotating left, please answer these questions in this post.Thanks,scott

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Expected range of gyro sensitivity between batches of iNemo Sensor

For iNEMO sensors, what Gyro Scale calibration is recommended?

What is the difference between STM32F446RET6 and STM32F446RET7?

MotionAC Library - understanding "dynamic" calibration, behavior of the "is_calibrated" flag returned from MotionAC_Update(), and if update rates > 100Hz are supported.

Using STM32F446, ISM330DHCX and MotionFX, computed yaw angle is correct after a controlled 90-degree right rotation, but the yaw angle is off by ~3 degrees after each 90-degree left rotation. What could be causing this issue?

Re: Expected range of gyro sensitivity between batches of iNemo Sensor

Re: Using STM32F446, ISM330DHCX and MotionFX, computed yaw angle is correct after a controlled 90-degree right rotation, but the yaw angle is off by ~3 degrees after each 90-degree left rotation. What could be causing this issue?

Re: Using STM32F446, ISM330DHCX and MotionFX, computed yaw angle is correct after a controlled 90-degree right rotation, but the yaw angle is off by ~3 degrees after each 90-degree left rotation. What could be causing this issue?

Re: Using STM32F446, ISM330DHCX and MotionFX, computed yaw angle is correct after a controlled 90-degree right rotation, but the yaw angle is off by ~3 degrees after each 90-degree left rotation. What could be causing this issue?

Re: Using STM32F446, ISM330DHCX and MotionFX, computed yaw angle is correct after a controlled 90-degree right rotation, but the yaw angle is off by ~3 degrees after each 90-degree left rotation. What could be causing this issue?