SmartMotion® MEMS Motion Sensors

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By jars121 , 9 July 2021

Hi all,

I've recently returned to an existing project which uses the ICM-20948, and I'm finding that my previous code is no longer working as it once was. I'm using the provided eMD-SmartMotion-ICM20948-1.1.0 library as the basis for my ICM-20948 application, and have largely mimicked the included SAM G55 project.

By jurbanmetromilecom , 6 July 2021

Has anyone been able to sample the ICM-20948 accelerometer at the maximum rate of 4.5kHz via the FIFO?
I cannot get it to go over 1125Hz, even after confirming all of the settings.
In particular, ACCEL_FCHOICE=0, ACCEL_CYCLE=0
I'm confirming the rate by the actual flow out of the FIFO, and am confirming that the FIFO is not overflowing.

By enricosansone9… , 24 June 2021

Hi,

I'm using an ICM-20689 sensor and I've beenable to set it up successfully and get data from it, but I have a problem.

I've setup the accelerometer with the following parameters: SMPLRT_DIV = 3, 10Hz filter, ±16 full scale, so I have a sample rate of 250Hz, average 4 samples; it works fine, in fact I get about 2050 as raw data from z-axis, which is correct, x and y axis are working as expected as well.

I've configured the FIFO (with accel data only), and I managed to get the accelerometer data from it without any problem.

By yomuevansgmailcom , 22 June 2021

If anyone is looking for source code on the DK-20948 Board, because Invensense have made a poor documentation, here it is

Documentation
https://asf.microchip.com/docs/3.49.1/samg/html/

By ashjacowlargmailcom , 17 June 2021

Hey i am using an MPU6050 in a linux environment. I have 2 different modules both read invense 6050 on them but the contents of their WHO_AM_I register are
0x68 and 0x98 . I wrote code for the 0x98 one . when switching to the 0x68 one i am getting error in reading values .So i want to calibrate the sensor but don't know how to set the bias offsets

By alderbaran7481… , 12 June 2021

Hello everyone,

I am planning to move from MPU9250 to a new IMU and and would like to get your feedback on which one is currently the best (6-AXIS GYRO+ACCEL minimum, compass is a nice-to-have).

The IMU will be used in a robotic platform to get the angle of a mechanical joint instead of using a position sensor.
Power consumption, price, package, industrial/automotive rating does not matter, I mainly use the raw data and do the filtering on an external processing unit. 

So if you had to choose only one, what would you use?