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[IMU] Decouple Mag/CoG; Prefer MAG if available, if not - use CoG

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This commit is contained in:
Konstantin Sharlaimov (DigitalEntity) 2019-02-18 20:57:05 +01:00
parent 7685d04ca2
commit a0e6c7e847
1 changed files with 8 additions and 15 deletions
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23
src/main/flight/imu.c
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@ -493,13 +493,15 @@ static void imuCalculateEstimatedAttitude(float dT)
if (STATE(FIXED_WING)) {
bool canUseCOG = isGPSHeadingValid();
if (canUseCOG) {
// Prefer compass (if available)
if (canUseMAG) {
useMag = true;
gpsHeadingInitialized = true; // GPS heading initialised from MAG, continue on GPS if compass fails
}
else if (canUseCOG) {
if (gpsHeadingInitialized) {
// Use GPS heading if error is acceptable or if it's the only source of heading
if (ABS(gpsSol.groundCourse - attitude.values.yaw) < DEGREES_TO_DECIDEGREES(MAX_GPS_HEADING_ERROR_DEG) || !canUseMAG) {
courseOverGround = DECIDEGREES_TO_RADIANS(gpsSol.groundCourse);
useCOG = true;
}
courseOverGround = DECIDEGREES_TO_RADIANS(gpsSol.groundCourse);
useCOG = true;
}
else {
// Re-initialize quaternion from known Roll, Pitch and GPS heading
@ -509,15 +511,6 @@ static void imuCalculateEstimatedAttitude(float dT)
// Force reset of heading hold target
resetHeadingHoldTarget(DECIDEGREES_TO_DEGREES(attitude.values.yaw));
}
// If we can't use COG and there's MAG available - fallback
if (!useCOG && canUseMAG) {
useMag = true;
}
}
else if (canUseMAG) {
useMag = true;
gpsHeadingInitialized = true; // GPS heading initialised from MAG, continue on GPS if possible
}
}
else {