FXOS8700CQR1 calibration fails every second time

[shop]

Dear Community,

I am using the FXOS8700CQR1 sucessfully on Atmel controller.

But every second time, the calibration fails:

First time I can calibrate it.

xmag average= -474

ymag average=-569

zmag average=-626

when I start the second time, calibration fails with

xmag average= -82

ymag average=-88

zmag average=-374

I have reviewed and compared code with examples here:

FXOS8700CQ - Bare metal example project 

Accelerometer and magnetometer FXOS8700CQ example code for MQX4.1.1 

Problem I still cannot get it. The problem is reproducible every second time.

I call both calibration from the attached library.

      FXO.SetAccelOffset();

and

FXO.CalibrateMagn();

thank you and best regads,

Alain

[shop]

After deeply investigation, I found out, that prior to a new calibration the offset values must be reset to 0 for all axes. Includes Magnetometer and Accelerometer.

Now it is working very good!

[rubensjunior]

FXOS8700CQR1 calibration fails every second time‌,

Dear Alain Fuchs,

It is correct, and can viewed in https://www.nxp.com/docs/en/data-sheet/FXOS8700CQ.pdf .

Best Regards.