can we use the eCompass (MotionEC) and magnetometer calibration library with Lpc microcontroller.

[PTada]

Hi ,

Can we use the libraries of  eCompass (MotionEC) and magnetometer calibration library (MotionMC) available in X-CUBE-MEMS1 package from the below path with lpc microcontroller.

 https://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-expansion-packages/x-cube-mems1.html

[Miroslav BATEK]

Unfortunately not, the libraries are intended for STM32 microcontrollers.

[PTada]

Actually i am stuck in middle of something,

I am using magnetometer LIS3MDL to work more like a E-Compass. We are measuring azimuth angle. I am not able to get tilt compensation right. Is there any reference design specific to this chip.

This is the equation i am trying to use. Please let me know if there is something wrong. I am able to verify pitch and roll variations correctly.

roll= atan(accData.fy/accData.fz);

pitch= atan(-accData.fx/accData.fz);

cosRoll = cos(roll);

sinRoll = sin(roll);

cosPitch = cos(pitch);

sinPitch = sin(pitch);

Xh = (magData.fx)*cosPitch + (magData.fy*sinPitch*sinRoll) + (magData.fz*sinPitch*cosRoll);

Yh = (magData.fz)*sinRoll - (magData.fy)*cosRoll;

magHeading = atan2(Yh, Xh);

We will have to mount this on a metal structure, How can i compensate for soft iron.