Files
firmware/src/Fusion/FusionCompass.c
Jorropo beb268ff25 Revert "add a .clang-format file (#9154)" (#9172)
I thought git would be smart enough to understand all the whitespace changes but even with all the flags I know to make it ignore theses it still blows up if there are identical changes on both sides.

I have a solution but it require creating a new commit at the merge base for each conflicting PR and merging it into develop.

I don't think blowing up all PRs is worth for now, maybe if we can coordinate this for V3 let's say.

This reverts commit 0d11331d18.
2026-01-04 05:15:53 -06:00

52 lines
2.1 KiB
C

/**
* @file FusionCompass.c
* @author Seb Madgwick
* @brief Tilt-compensated compass to calculate the magnetic heading using
* accelerometer and magnetometer measurements.
*/
//------------------------------------------------------------------------------
// Includes
#include "FusionCompass.h"
#include "FusionAxes.h"
#include <math.h> // atan2f
//------------------------------------------------------------------------------
// Functions
/**
* @brief Calculates the magnetic heading.
* @param convention Earth axes convention.
* @param accelerometer Accelerometer measurement in any calibrated units.
* @param magnetometer Magnetometer measurement in any calibrated units.
* @return Heading angle in degrees.
*/
float FusionCompassCalculateHeading(const FusionConvention convention, const FusionVector accelerometer,
const FusionVector magnetometer)
{
switch (convention) {
case FusionConventionNwu: {
const FusionVector west = FusionVectorNormalise(FusionVectorCrossProduct(accelerometer, magnetometer));
const FusionVector north = FusionVectorNormalise(FusionVectorCrossProduct(west, accelerometer));
return FusionRadiansToDegrees(atan2f(west.axis.x, north.axis.x));
}
case FusionConventionEnu: {
const FusionVector west = FusionVectorNormalise(FusionVectorCrossProduct(accelerometer, magnetometer));
const FusionVector north = FusionVectorNormalise(FusionVectorCrossProduct(west, accelerometer));
const FusionVector east = FusionVectorMultiplyScalar(west, -1.0f);
return FusionRadiansToDegrees(atan2f(north.axis.x, east.axis.x));
}
case FusionConventionNed: {
const FusionVector up = FusionVectorMultiplyScalar(accelerometer, -1.0f);
const FusionVector west = FusionVectorNormalise(FusionVectorCrossProduct(up, magnetometer));
const FusionVector north = FusionVectorNormalise(FusionVectorCrossProduct(west, up));
return FusionRadiansToDegrees(atan2f(west.axis.x, north.axis.x));
}
}
return 0; // avoid compiler warning
}
//------------------------------------------------------------------------------
// End of file