static bool UBLOX_parse_gps(void)
{
int i;
switch (_msg_id) {
case MSG_POSLLH:
//i2c_dataset.time = _buffer.posllh.time;
GPS_coord[LON] = _buffer.posllh.longitude;
GPS_coord[LAT] = _buffer.posllh.latitude;
GPS_altitude = _buffer.posllh.altitude_msl / 10 / 100; //alt in m
if (next_fix) {
ENABLE_STATE(GPS_FIX);
} else {
DISABLE_STATE(GPS_FIX);
}
_new_position = true;
break;
case MSG_STATUS:
next_fix = (_buffer.status.fix_status & NAV_STATUS_FIX_VALID) && (_buffer.status.fix_type == FIX_3D);
if (!next_fix)
DISABLE_STATE(GPS_FIX);
break;
case MSG_SOL:
next_fix = (_buffer.solution.fix_status & NAV_STATUS_FIX_VALID) && (_buffer.solution.fix_type == FIX_3D);
if (!next_fix)
DISABLE_STATE(GPS_FIX);
GPS_numSat = _buffer.solution.satellites;
GPS_hdop = _buffer.solution.position_DOP;
break;
case MSG_VELNED:
// speed_3d = _buffer.velned.speed_3d; // cm/s
GPS_speed = _buffer.velned.speed_2d; // cm/s
GPS_ground_course = (uint16_t) (_buffer.velned.heading_2d / 10000); // Heading 2D deg * 100000 rescaled to deg * 10
_new_speed = true;
break;
case MSG_SVINFO:
GPS_numCh = _buffer.svinfo.numCh;
if (GPS_numCh > 16)
GPS_numCh = 16;
for (i = 0; i < GPS_numCh; i++){
GPS_svinfo_chn[i]= _buffer.svinfo.channel[i].chn;
GPS_svinfo_svid[i]= _buffer.svinfo.channel[i].svid;
GPS_svinfo_quality[i]=_buffer.svinfo.channel[i].quality;
GPS_svinfo_cno[i]= _buffer.svinfo.channel[i].cno;
}
break;
default:
return false;
}
// we only return true when we get new position and speed data
// this ensures we don't use stale data
if (_new_position && _new_speed) {
_new_speed = _new_position = false;
return true;
}
return false;
}
void servoConfigureOutput(void)
{
if (useServo) {
servoRuleCount = servoMixers[currentMixerMode].servoRuleCount;
if (servoMixers[currentMixerMode].rule) {
for (int i = 0; i < servoRuleCount; i++)
currentServoMixer[i] = servoMixers[currentMixerMode].rule[i];
}
}
// set flag that we're on something with wings
if (currentMixerMode == MIXER_FLYING_WING ||
currentMixerMode == MIXER_AIRPLANE ||
currentMixerMode == MIXER_CUSTOM_AIRPLANE
) {
ENABLE_STATE(FIXED_WING);
if (currentMixerMode == MIXER_CUSTOM_AIRPLANE) {
loadCustomServoMixer();
}
} else {
DISABLE_STATE(FIXED_WING);
if (currentMixerMode == MIXER_CUSTOM_TRI) {
loadCustomServoMixer();
}
}
}
static void gpsHandleProtocol(void)
{
bool newDataReceived = false;
// Call protocol-specific code
if (gpsProviders[gpsState.gpsConfig->provider].read) {
newDataReceived = gpsProviders[gpsState.gpsConfig->provider].read();
}
// Received new update for solution data
if (newDataReceived) {
// Set GPS fix flag only if we have 3D fix
if (gpsSol.fixType == GPS_FIX_3D) {
ENABLE_STATE(GPS_FIX);
}
else {
DISABLE_STATE(GPS_FIX);
}
// Update GPS coordinates etc
sensorsSet(SENSOR_GPS);
onNewGPSData();
// Update timeout
gpsState.lastLastMessageMs = gpsState.lastMessageMs;
gpsState.lastMessageMs = millis();
// Update statistics
gpsStats.lastMessageDt = gpsState.lastMessageMs - gpsState.lastLastMessageMs;
}
}
void compassUpdate(uint32_t currentTime, flightDynamicsTrims_t *magZero)
{
static uint32_t tCal = 0;
static flightDynamicsTrims_t magZeroTempMin;
static flightDynamicsTrims_t magZeroTempMax;
magDev.read(&magDev, magADCRaw);
for (int axis = 0; axis < XYZ_AXIS_COUNT; axis++) {
mag.magADC[axis] = magADCRaw[axis];
}
alignSensors(mag.magADC, magDev.magAlign);
if (STATE(CALIBRATE_MAG)) {
tCal = currentTime;
for (int axis = 0; axis < 3; axis++) {
magZero->raw[axis] = 0;
magZeroTempMin.raw[axis] = mag.magADC[axis];
magZeroTempMax.raw[axis] = mag.magADC[axis];
}
DISABLE_STATE(CALIBRATE_MAG);
}
if (magInit) { // we apply offset only once mag calibration is done
mag.magADC[X] -= magZero->raw[X];
mag.magADC[Y] -= magZero->raw[Y];
mag.magADC[Z] -= magZero->raw[Z];
}
if (tCal != 0) {
if ((currentTime - tCal) < 30000000) { // 30s: you have 30s to turn the multi in all directions
LED0_TOGGLE;
for (int axis = 0; axis < 3; axis++) {
if (mag.magADC[axis] < magZeroTempMin.raw[axis])
magZeroTempMin.raw[axis] = mag.magADC[axis];
if (mag.magADC[axis] > magZeroTempMax.raw[axis])
magZeroTempMax.raw[axis] = mag.magADC[axis];
}
} else {
tCal = 0;
for (int axis = 0; axis < 3; axis++) {
magZero->raw[axis] = (magZeroTempMin.raw[axis] + magZeroTempMax.raw[axis]) / 2; // Calculate offsets
}
saveConfigAndNotify();
}
}
}
STATIC_UNIT_TESTED void imuUpdateEulerAngles(void)
{
/* Compute pitch/roll angles */
attitude.values.roll = RADIANS_TO_DECIDEGREES(atan2_approx(rMat[2][1], rMat[2][2]));
attitude.values.pitch = RADIANS_TO_DECIDEGREES((0.5f * M_PIf) - acos_approx(-rMat[2][0]));
attitude.values.yaw = RADIANS_TO_DECIDEGREES(-atan2_approx(rMat[1][0], rMat[0][0])) + magneticDeclination;
if (attitude.values.yaw < 0)
attitude.values.yaw += 3600;
/* Update small angle state */
if (rMat[2][2] > smallAngleCosZ) {
ENABLE_STATE(SMALL_ANGLE);
} else {
DISABLE_STATE(SMALL_ANGLE);
}
}
STATIC_UNIT_TESTED void imuUpdateEulerAngles(void)
{
/* Compute pitch/roll angles */
attitude.values.roll = lrintf(atan2f(rMat[2][1], rMat[2][2]) * (1800.0f / M_PIf));
attitude.values.pitch = lrintf(((0.5f * M_PIf) - acosf(-rMat[2][0])) * (1800.0f / M_PIf));
attitude.values.yaw = lrintf((-atan2f(rMat[1][0], rMat[0][0]) * (1800.0f / M_PIf) + magneticDeclination));
if (attitude.values.yaw < 0)
attitude.values.yaw += 3600;
/* Update small angle state */
if (rMat[2][2] > smallAngleCosZ) {
ENABLE_STATE(SMALL_ANGLE);
} else {
DISABLE_STATE(SMALL_ANGLE);
}
}
void gpsThread(void)
{
// read out available GPS bytes
if (gpsPort) {
while (serialRxBytesWaiting(gpsPort))
gpsNewData(serialRead(gpsPort));
}
switch (gpsData.state) {
case GPS_UNKNOWN:
break;
case GPS_INITIALIZING:
case GPS_CHANGE_BAUD:
case GPS_CONFIGURE:
gpsInitHardware();
break;
case GPS_LOST_COMMUNICATION:
gpsData.timeouts++;
if (gpsConfig()->autoBaud) {
// try another rate
gpsData.baudrateIndex++;
gpsData.baudrateIndex %= GPS_INIT_ENTRIES;
}
gpsData.lastMessage = millis();
// TODO - move some / all of these into gpsData
GPS_numSat = 0;
DISABLE_STATE(GPS_FIX);
gpsSetState(GPS_INITIALIZING);
break;
case GPS_RECEIVING_DATA:
// check for no data/gps timeout/cable disconnection etc
if (millis() - gpsData.lastMessage > GPS_TIMEOUT) {
// remove GPS from capability
sensorsClear(SENSOR_GPS);
gpsSetState(GPS_LOST_COMMUNICATION);
}
break;
}
}
void updateGpsWaypointsAndMode(void)
{
static uint8_t GPSNavReset = 1;
if (STATE(GPS_FIX) && GPS_numSat >= 5) {
// if both GPS_HOME & GPS_HOLD are checked => GPS_HOME is the priority
if (rcOptions[BOXGPSHOME]) {
if (!STATE(GPS_HOME_MODE)) {
ENABLE_FLIGHT_MODE(GPS_HOME_MODE);
DISABLE_FLIGHT_MODE(GPS_HOLD_MODE);
GPSNavReset = 0;
GPS_set_next_wp(&GPS_home[LAT], &GPS_home[LON]);
nav_mode = NAV_MODE_WP;
}
} else {
DISABLE_STATE(GPS_HOME_MODE);
if (rcOptions[BOXGPSHOLD] && areSticksInApModePosition(gpsProfile->ap_mode)) {
if (!FLIGHT_MODE(GPS_HOLD_MODE)) {
ENABLE_STATE(GPS_HOLD_MODE);
GPSNavReset = 0;
GPS_hold[LAT] = GPS_coord[LAT];
GPS_hold[LON] = GPS_coord[LON];
GPS_set_next_wp(&GPS_hold[LAT], &GPS_hold[LON]);
nav_mode = NAV_MODE_POSHOLD;
}
} else {
DISABLE_FLIGHT_MODE(GPS_HOLD_MODE);
// both boxes are unselected here, nav is reset if not already done
if (GPSNavReset == 0) {
GPSNavReset = 1;
GPS_reset_nav();
}
}
}
} else {
DISABLE_FLIGHT_MODE(GPS_HOME_MODE);
DISABLE_FLIGHT_MODE(GPS_HOLD_MODE);
nav_mode = NAV_MODE_NONE;
}
}
STATIC_UNIT_TESTED void imuUpdateEulerAngles(void)
{
#ifndef GPS
// this local variable should be optimized out when GPS is not used.
float magneticDeclination = 0.0f;
#endif
/* Compute pitch/roll angles */
attitude.values.roll = lrintf(atan2_approx(rMat[2][1], rMat[2][2]) * (1800.0f / M_PIf));
attitude.values.pitch = lrintf(((0.5f * M_PIf) - acos_approx(-rMat[2][0])) * (1800.0f / M_PIf));
attitude.values.yaw = lrintf((-atan2_approx(rMat[1][0], rMat[0][0]) * (1800.0f / M_PIf) + magneticDeclination));
if (attitude.values.yaw < 0)
attitude.values.yaw += 3600;
/* Update small angle state */
if (rMat[2][2] > smallAngleCosZ) {
ENABLE_STATE(SMALL_ANGLE);
} else {
DISABLE_STATE(SMALL_ANGLE);
}
}
static void gpsHandleProtocol(void)
{
bool newDataReceived = false;
// Call protocol-specific code
if (gpsProviders[gpsState.gpsConfig->provider].read) {
newDataReceived = gpsProviders[gpsState.gpsConfig->provider].read();
}
// Received new update for solution data
if (newDataReceived) {
// Set GPS fix flag only if we have 3D fix
if (gpsSol.fixType == GPS_FIX_3D && gpsSol.numSat >= gpsConfig()->gpsMinSats) {
ENABLE_STATE(GPS_FIX);
}
else {
/* When no fix available - reset flags as well */
gpsSol.flags.validVelNE = 0;
gpsSol.flags.validVelD = 0;
gpsSol.flags.validEPE = 0;
DISABLE_STATE(GPS_FIX);
}
// Update GPS coordinates etc
sensorsSet(SENSOR_GPS);
onNewGPSData();
// Update timeout
gpsState.lastLastMessageMs = gpsState.lastMessageMs;
gpsState.lastMessageMs = millis();
// Update statistics
gpsStats.lastMessageDt = gpsState.lastMessageMs - gpsState.lastLastMessageMs;
}
}
static bool gpsNewFrameNMEA(char c)
{
static gpsDataNmea_t gps_Msg;
uint8_t frameOK = 0;
static uint8_t param = 0, offset = 0, parity = 0;
static char string[15];
static uint8_t checksum_param, gps_frame = NO_FRAME;
static uint8_t svMessageNum = 0;
uint8_t svSatNum = 0, svPacketIdx = 0, svSatParam = 0;
switch (c) {
case '$':
param = 0;
offset = 0;
parity = 0;
break;
case ',':
case '*':
string[offset] = 0;
if (param == 0) { //frame identification
gps_frame = NO_FRAME;
if (string[0] == 'G' && string[1] == 'P' && string[2] == 'G' && string[3] == 'G' && string[4] == 'A')
gps_frame = FRAME_GGA;
if (string[0] == 'G' && string[1] == 'P' && string[2] == 'R' && string[3] == 'M' && string[4] == 'C')
gps_frame = FRAME_RMC;
if (string[0] == 'G' && string[1] == 'P' && string[2] == 'G' && string[3] == 'S' && string[4] == 'V')
gps_frame = FRAME_GSV;
}
switch (gps_frame) {
case FRAME_GGA: //************* GPGGA FRAME parsing
switch(param) {
// case 1: // Time information
// break;
case 2:
gps_Msg.latitude = GPS_coord_to_degrees(string);
break;
case 3:
if (string[0] == 'S')
gps_Msg.latitude *= -1;
break;
case 4:
gps_Msg.longitude = GPS_coord_to_degrees(string);
break;
case 5:
if (string[0] == 'W')
gps_Msg.longitude *= -1;
break;
case 6:
if (string[0] > '0') {
ENABLE_STATE(GPS_FIX);
} else {
DISABLE_STATE(GPS_FIX);
}
break;
case 7:
gps_Msg.numSat = grab_fields(string, 0);
break;
case 9:
gps_Msg.altitude = grab_fields(string, 0); // altitude in meters added by Mis
break;
}
break;
case FRAME_RMC: //************* GPRMC FRAME parsing
switch(param) {
case 7:
gps_Msg.speed = ((grab_fields(string, 1) * 5144L) / 1000L); // speed in cm/s added by Mis
break;
case 8:
gps_Msg.ground_course = (grab_fields(string, 1)); // ground course deg * 10
break;
}
break;
case FRAME_GSV:
switch(param) {
/*case 1:
// Total number of messages of this type in this cycle
break; */
case 2:
// Message number
svMessageNum = grab_fields(string, 0);
break;
case 3:
// Total number of SVs visible
GPS_numCh = grab_fields(string, 0);
break;
}
if(param < 4)
break;
svPacketIdx = (param - 4) / 4 + 1; // satellite number in packet, 1-4
svSatNum = svPacketIdx + (4 * (svMessageNum - 1)); // global satellite number
svSatParam = param - 3 - (4 * (svPacketIdx - 1)); // parameter number for satellite
if(svSatNum > GPS_SV_MAXSATS)
break;
switch(svSatParam) {
case 1:
// SV PRN number
GPS_svinfo_chn[svSatNum - 1] = svSatNum;
GPS_svinfo_svid[svSatNum - 1] = grab_fields(string, 0);
break;
/*case 2:
// Elevation, in degrees, 90 maximum
break;
case 3:
// Azimuth, degrees from True North, 000 through 359
break; */
case 4:
// SNR, 00 through 99 dB (null when not tracking)
GPS_svinfo_cno[svSatNum - 1] = grab_fields(string, 0);
GPS_svinfo_quality[svSatNum - 1] = 0; // only used by ublox
break;
}
GPS_svInfoReceivedCount++;
break;
}
param++;
offset = 0;
if (c == '*')
checksum_param = 1;
else
parity ^= c;
break;
case '\r':
case '\n':
if (checksum_param) { //parity checksum
shiftPacketLog();
uint8_t checksum = 16 * ((string[0] >= 'A') ? string[0] - 'A' + 10 : string[0] - '0') + ((string[1] >= 'A') ? string[1] - 'A' + 10 : string[1] - '0');
if (checksum == parity) {
*gpsPacketLogChar = LOG_IGNORED;
GPS_packetCount++;
switch (gps_frame) {
case FRAME_GGA:
*gpsPacketLogChar = LOG_NMEA_GGA;
frameOK = 1;
if (STATE(GPS_FIX)) {
GPS_coord[LAT] = gps_Msg.latitude;
GPS_coord[LON] = gps_Msg.longitude;
GPS_numSat = gps_Msg.numSat;
GPS_altitude = gps_Msg.altitude;
}
break;
case FRAME_RMC:
*gpsPacketLogChar = LOG_NMEA_RMC;
GPS_speed = gps_Msg.speed;
GPS_ground_course = gps_Msg.ground_course;
break;
} // end switch
} else {
*gpsPacketLogChar = LOG_ERROR;
}
}
checksum_param = 0;
break;
default:
if (offset < 15)
string[offset++] = c;
if (!checksum_param)
parity ^= c;
}
return frameOK;
}
void mixerInit(mixerMode_e mixerMode, motorMixer_t *initialCustomMotorMixers, servoMixer_t *initialCustomServoMixers)
{
uint8_t i;
// set flag that we're on something with wings
if (currentMixerMode == MIXER_FLYING_WING ||
currentMixerMode == MIXER_AIRPLANE ||
currentMixerMode == MIXER_CUSTOM_AIRPLANE
) {
ENABLE_STATE(FIXED_WING);
} else {
DISABLE_STATE(FIXED_WING);
}
currentMixerMode = mixerMode;
customMixers = initialCustomMotorMixers;
customServoMixers = initialCustomServoMixers;
minServoIndex = servoMixers[currentMixerMode].minServoIndex;
maxServoIndex = servoMixers[currentMixerMode].maxServoIndex;
// enable servos for mixes that require them. note, this shifts motor counts.
mixerUsesServos = mixers[currentMixerMode].useServo;
// if we want camstab/trig, that also enables servos, even if mixer doesn't
servoOutputEnabled = mixerUsesServos || feature(FEATURE_SERVO_TILT) || feature(FEATURE_CHANNEL_FORWARDING);
// give all servos a default command
for (i = 0; i < MAX_SUPPORTED_SERVOS; i++) {
servo[i] = DEFAULT_SERVO_MIDDLE;
}
/*
* If mixer has predefined servo mixes, load them
*/
if (mixerUsesServos) {
servoRuleCount = servoMixers[currentMixerMode].servoRuleCount;
if (servoMixers[currentMixerMode].rule) {
for (i = 0; i < servoRuleCount; i++)
currentServoMixer[i] = servoMixers[currentMixerMode].rule[i];
}
}
/*
* When we are dealing with CUSTOM mixers, load mixes defined with
* smix and update internal variables
*/
if (currentMixerMode == MIXER_CUSTOM_AIRPLANE ||
currentMixerMode == MIXER_CUSTOM_TRI ||
currentMixerMode == MIXER_CUSTOM)
{
loadCustomServoMixer();
// If there are servo rules after all, update variables
if (servoRuleCount > 0) {
servoOutputEnabled = 1;
mixerUsesServos = 1;
}
}
}
void processRx(void)
{
static bool armedBeeperOn = false;
calculateRxChannelsAndUpdateFailsafe(currentTime);
// in 3D mode, we need to be able to disarm by switch at any time
if (feature(FEATURE_3D)) {
if (!IS_RC_MODE_ACTIVE(BOXARM))
mwDisarm();
}
updateRSSI(currentTime);
if (feature(FEATURE_FAILSAFE)) {
if (currentTime > FAILSAFE_POWER_ON_DELAY_US && !failsafeIsMonitoring()) {
failsafeStartMonitoring();
}
failsafeUpdateState();
}
throttleStatus_e throttleStatus = calculateThrottleStatus(&masterConfig.rxConfig, masterConfig.flight3DConfig.deadband3d_throttle);
// When armed and motors aren't spinning, do beeps and then disarm
// board after delay so users without buzzer won't lose fingers.
// mixTable constrains motor commands, so checking throttleStatus is enough
if (ARMING_FLAG(ARMED)
&& feature(FEATURE_MOTOR_STOP)
&& !STATE(FIXED_WING)
) {
if (isUsingSticksForArming()) {
if (throttleStatus == THROTTLE_LOW) {
if (masterConfig.auto_disarm_delay != 0
&& (int32_t)(disarmAt - millis()) < 0
) {
// auto-disarm configured and delay is over
mwDisarm();
armedBeeperOn = false;
} else {
// still armed; do warning beeps while armed
beeper(BEEPER_ARMED);
armedBeeperOn = true;
}
} else {
// throttle is not low
if (masterConfig.auto_disarm_delay != 0) {
// extend disarm time
disarmAt = millis() + masterConfig.auto_disarm_delay * 1000;
}
if (armedBeeperOn) {
beeperSilence();
armedBeeperOn = false;
}
}
} else {
// arming is via AUX switch; beep while throttle low
if (throttleStatus == THROTTLE_LOW) {
beeper(BEEPER_ARMED);
armedBeeperOn = true;
} else if (armedBeeperOn) {
beeperSilence();
armedBeeperOn = false;
}
}
}
processRcStickPositions(&masterConfig.rxConfig, throttleStatus, masterConfig.disarm_kill_switch, masterConfig.fixed_wing_auto_arm);
updateActivatedModes(currentProfile->modeActivationConditions, currentProfile->modeActivationOperator);
if (!cliMode) {
updateAdjustmentStates(currentProfile->adjustmentRanges);
processRcAdjustments(currentControlRateProfile, &masterConfig.rxConfig);
}
bool canUseHorizonMode = true;
if ((IS_RC_MODE_ACTIVE(BOXANGLE) || (feature(FEATURE_FAILSAFE) && failsafeIsActive()) || naivationRequiresAngleMode()) && sensors(SENSOR_ACC)) {
// bumpless transfer to Level mode
canUseHorizonMode = false;
if (!FLIGHT_MODE(ANGLE_MODE)) {
ENABLE_FLIGHT_MODE(ANGLE_MODE);
}
} else {
DISABLE_FLIGHT_MODE(ANGLE_MODE); // failsafe support
}
if (IS_RC_MODE_ACTIVE(BOXHORIZON) && canUseHorizonMode) {
DISABLE_FLIGHT_MODE(ANGLE_MODE);
if (!FLIGHT_MODE(HORIZON_MODE)) {
ENABLE_FLIGHT_MODE(HORIZON_MODE);
}
} else {
DISABLE_FLIGHT_MODE(HORIZON_MODE);
}
if (FLIGHT_MODE(ANGLE_MODE) || FLIGHT_MODE(HORIZON_MODE)) {
LED1_ON;
} else {
LED1_OFF;
}
/* Heading lock mode */
if (IS_RC_MODE_ACTIVE(BOXHEADINGLOCK)) {
if (!FLIGHT_MODE(HEADING_LOCK)) {
ENABLE_FLIGHT_MODE(HEADING_LOCK);
}
} else {
DISABLE_FLIGHT_MODE(HEADING_LOCK);
}
/* Flaperon mode */
if (IS_RC_MODE_ACTIVE(BOXFLAPERON) && STATE(FLAPERON_AVAILABLE)) {
if (!FLIGHT_MODE(FLAPERON)) {
ENABLE_FLIGHT_MODE(FLAPERON);
}
} else {
DISABLE_FLIGHT_MODE(FLAPERON);
}
/* Turn assistant mode */
if (IS_RC_MODE_ACTIVE(BOXTURNASSIST)) {
if (!FLIGHT_MODE(TURN_ASSISTANT)) {
ENABLE_FLIGHT_MODE(TURN_ASSISTANT);
}
} else {
DISABLE_FLIGHT_MODE(TURN_ASSISTANT);
}
#if defined(MAG)
if (sensors(SENSOR_ACC) || sensors(SENSOR_MAG)) {
if (IS_RC_MODE_ACTIVE(BOXMAG)) {
if (!FLIGHT_MODE(MAG_MODE)) {
resetMagHoldHeading(DECIDEGREES_TO_DEGREES(attitude.values.yaw));
ENABLE_FLIGHT_MODE(MAG_MODE);
}
} else {
DISABLE_FLIGHT_MODE(MAG_MODE);
}
if (IS_RC_MODE_ACTIVE(BOXHEADFREE)) {
if (!FLIGHT_MODE(HEADFREE_MODE)) {
ENABLE_FLIGHT_MODE(HEADFREE_MODE);
}
} else {
DISABLE_FLIGHT_MODE(HEADFREE_MODE);
}
if (IS_RC_MODE_ACTIVE(BOXHEADADJ)) {
headFreeModeHold = DECIDEGREES_TO_DEGREES(attitude.values.yaw); // acquire new heading
}
}
#endif
// Navigation may override PASSTHRU_MODE
if (IS_RC_MODE_ACTIVE(BOXPASSTHRU) && !naivationRequiresAngleMode()) {
ENABLE_FLIGHT_MODE(PASSTHRU_MODE);
} else {
DISABLE_FLIGHT_MODE(PASSTHRU_MODE);
}
/* In airmode Iterm should be prevented to grow when Low thottle and Roll + Pitch Centered.
This is needed to prevent Iterm winding on the ground, but keep full stabilisation on 0 throttle while in air
Low Throttle + roll and Pitch centered is assuming the copter is on the ground. Done to prevent complex air/ground detections */
if (FLIGHT_MODE(PASSTHRU_MODE) || !ARMING_FLAG(ARMED)) {
/* In PASSTHRU mode we reset integrators prevent I-term wind-up (PID output is not used in PASSTHRU) */
pidResetErrorAccumulators();
}
else {
if (throttleStatus == THROTTLE_LOW) {
if (IS_RC_MODE_ACTIVE(BOXAIRMODE) && !failsafeIsActive() && ARMING_FLAG(ARMED)) {
rollPitchStatus_e rollPitchStatus = calculateRollPitchCenterStatus(&masterConfig.rxConfig);
// ANTI_WINDUP at centred stick with MOTOR_STOP is needed on MRs and not needed on FWs
if ((rollPitchStatus == CENTERED) || (feature(FEATURE_MOTOR_STOP) && !STATE(FIXED_WING))) {
ENABLE_STATE(ANTI_WINDUP);
}
else {
DISABLE_STATE(ANTI_WINDUP);
}
}
else {
DISABLE_STATE(ANTI_WINDUP);
pidResetErrorAccumulators();
}
}
else {
DISABLE_STATE(ANTI_WINDUP);
}
}
if (masterConfig.mixerMode == MIXER_FLYING_WING || masterConfig.mixerMode == MIXER_AIRPLANE || masterConfig.mixerMode == MIXER_CUSTOM_AIRPLANE) {
DISABLE_FLIGHT_MODE(HEADFREE_MODE);
}
#ifdef TELEMETRY
if (feature(FEATURE_TELEMETRY)) {
if ((!masterConfig.telemetryConfig.telemetry_switch && ARMING_FLAG(ARMED)) ||
(masterConfig.telemetryConfig.telemetry_switch && IS_RC_MODE_ACTIVE(BOXTELEMETRY))) {
releaseSharedTelemetryPorts();
} else {
// the telemetry state must be checked immediately so that shared serial ports are released.
telemetryCheckState();
mspSerialAllocatePorts();
}
}
#endif
}
static void imuCalculateEstimatedAttitude(void)
{
int32_t axis;
int32_t accMag = 0;
static t_fp_vector EstM;
static t_fp_vector EstN = { .A = { 1.0f, 0.0f, 0.0f } };
static float accLPF[3];
static uint32_t previousT;
uint32_t currentT = micros();
uint32_t deltaT;
float scale;
fp_angles_t deltaGyroAngle;
deltaT = currentT - previousT;
scale = deltaT * gyroScaleRad;
previousT = currentT;
// Initialization
for (axis = 0; axis < 3; axis++) {
deltaGyroAngle.raw[axis] = gyroADC[axis] * scale;
if (imuRuntimeConfig->acc_lpf_factor > 0) {
accLPF[axis] = accLPF[axis] * (1.0f - (1.0f / imuRuntimeConfig->acc_lpf_factor)) + accADC[axis] * (1.0f / imuRuntimeConfig->acc_lpf_factor);
accSmooth[axis] = accLPF[axis];
} else {
accSmooth[axis] = accADC[axis];
}
accMag += (int32_t)accSmooth[axis] * accSmooth[axis];
}
accMag = accMag * 100 / ((int32_t)acc_1G * acc_1G);
rotateV(&EstG.V, &deltaGyroAngle);
// Apply complimentary filter (Gyro drift correction)
// If accel magnitude >1.15G or <0.85G and ACC vector outside of the limit range => we neutralize the effect of accelerometers in the angle estimation.
// To do that, we just skip filter, as EstV already rotated by Gyro
float invGyroComplimentaryFilterFactor = (1.0f / (imuRuntimeConfig->gyro_cmpf_factor + 1.0f));
if (72 < (uint16_t)accMag && (uint16_t)accMag < 133) {
for (axis = 0; axis < 3; axis++)
EstG.A[axis] = (EstG.A[axis] * imuRuntimeConfig->gyro_cmpf_factor + accSmooth[axis]) * invGyroComplimentaryFilterFactor;
}
if (EstG.A[Z] > smallAngle) {
ENABLE_STATE(SMALL_ANGLE);
} else {
DISABLE_STATE(SMALL_ANGLE);
}
// Attitude of the estimated vector
anglerad[AI_ROLL] = atan2f(EstG.V.Y, EstG.V.Z);
anglerad[AI_PITCH] = atan2f(-EstG.V.X, sqrtf(EstG.V.Y * EstG.V.Y + EstG.V.Z * EstG.V.Z));
inclination.values.rollDeciDegrees = lrintf(anglerad[AI_ROLL] * (1800.0f / M_PIf));
inclination.values.pitchDeciDegrees = lrintf(anglerad[AI_PITCH] * (1800.0f / M_PIf));
if (sensors(SENSOR_MAG)) {
rotateV(&EstM.V, &deltaGyroAngle);
// FIXME what does the _M_ mean?
float invGyroComplimentaryFilter_M_Factor = (1.0f / (imuRuntimeConfig->gyro_cmpfm_factor + 1.0f));
for (axis = 0; axis < 3; axis++) {
EstM.A[axis] = (EstM.A[axis] * imuRuntimeConfig->gyro_cmpfm_factor + magADC[axis]) * invGyroComplimentaryFilter_M_Factor;
}
heading = imuCalculateHeading(&EstM);
} else {
rotateV(&EstN.V, &deltaGyroAngle);
normalizeV(&EstN.V, &EstN.V);
heading = imuCalculateHeading(&EstN);
}
imuCalculateAcceleration(deltaT); // rotate acc vector into earth frame
}
void processRx(void)
{
static bool armedBeeperOn = false;
calculateRxChannelsAndUpdateFailsafe(currentTime);
// in 3D mode, we need to be able to disarm by switch at any time
if (feature(FEATURE_3D)) {
if (!IS_RC_MODE_ACTIVE(BOXARM))
mwDisarm();
}
updateRSSI(currentTime);
if (feature(FEATURE_FAILSAFE)) {
if (currentTime > FAILSAFE_POWER_ON_DELAY_US && !failsafeIsMonitoring()) {
failsafeStartMonitoring();
}
failsafeUpdateState();
}
throttleStatus_e throttleStatus = calculateThrottleStatus(rxConfig(), rcControlsConfig()->deadband3d_throttle);
rollPitchStatus_e rollPitchStatus = calculateRollPitchCenterStatus(rxConfig());
/* In airmode Iterm should be prevented to grow when Low thottle and Roll + Pitch Centered.
This is needed to prevent Iterm winding on the ground, but keep full stabilisation on 0 throttle while in air
Low Throttle + roll and Pitch centered is assuming the copter is on the ground. Done to prevent complex air/ground detections */
if (throttleStatus == THROTTLE_LOW) {
if (IS_RC_MODE_ACTIVE(BOXAIRMODE) && !failsafeIsActive() && ARMING_FLAG(ARMED)) {
if (rollPitchStatus == CENTERED) {
ENABLE_STATE(ANTI_WINDUP);
} else {
DISABLE_STATE(ANTI_WINDUP);
}
} else {
pidResetErrorAngle();
pidResetErrorGyro();
}
} else {
DISABLE_STATE(ANTI_WINDUP);
}
// When armed and motors aren't spinning, do beeps and then disarm
// board after delay so users without buzzer won't lose fingers.
// mixTable constrains motor commands, so checking throttleStatus is enough
if (ARMING_FLAG(ARMED)
&& feature(FEATURE_MOTOR_STOP)
&& !STATE(FIXED_WING)
) {
if (isUsingSticksForArming()) {
if (throttleStatus == THROTTLE_LOW) {
if (armingConfig()->auto_disarm_delay != 0
&& (int32_t)(disarmAt - millis()) < 0
) {
// auto-disarm configured and delay is over
mwDisarm();
armedBeeperOn = false;
} else {
// still armed; do warning beeps while armed
beeper(BEEPER_ARMED);
armedBeeperOn = true;
}
} else {
// throttle is not low
if (armingConfig()->auto_disarm_delay != 0) {
// extend disarm time
disarmAt = millis() + armingConfig()->auto_disarm_delay * 1000;
}
if (armedBeeperOn) {
beeperSilence();
armedBeeperOn = false;
}
}
} else {
// arming is via AUX switch; beep while throttle low
if (throttleStatus == THROTTLE_LOW) {
beeper(BEEPER_ARMED);
armedBeeperOn = true;
} else if (armedBeeperOn) {
beeperSilence();
armedBeeperOn = false;
}
}
}
processRcStickPositions(rxConfig(), throttleStatus, armingConfig()->retarded_arm, armingConfig()->disarm_kill_switch);
if (feature(FEATURE_INFLIGHT_ACC_CAL)) {
updateInflightCalibrationState();
}
updateActivatedModes(modeActivationProfile()->modeActivationConditions);
if (!cliMode) {
updateAdjustmentStates(adjustmentProfile()->adjustmentRanges);
processRcAdjustments(currentControlRateProfile, rxConfig());
}
bool canUseHorizonMode = true;
if ((IS_RC_MODE_ACTIVE(BOXANGLE) || (feature(FEATURE_FAILSAFE) && failsafeIsActive())) && (sensors(SENSOR_ACC))) {
// bumpless transfer to Level mode
canUseHorizonMode = false;
if (!FLIGHT_MODE(ANGLE_MODE)) {
pidResetErrorAngle();
ENABLE_FLIGHT_MODE(ANGLE_MODE);
}
} else {
DISABLE_FLIGHT_MODE(ANGLE_MODE); // failsafe support
}
if (IS_RC_MODE_ACTIVE(BOXHORIZON) && canUseHorizonMode) {
DISABLE_FLIGHT_MODE(ANGLE_MODE);
if (!FLIGHT_MODE(HORIZON_MODE)) {
pidResetErrorAngle();
ENABLE_FLIGHT_MODE(HORIZON_MODE);
}
} else {
DISABLE_FLIGHT_MODE(HORIZON_MODE);
}
if (FLIGHT_MODE(ANGLE_MODE) || FLIGHT_MODE(HORIZON_MODE)) {
LED1_ON;
} else {
LED1_OFF;
}
#ifdef MAG
if (sensors(SENSOR_ACC) || sensors(SENSOR_MAG)) {
if (IS_RC_MODE_ACTIVE(BOXMAG)) {
if (!FLIGHT_MODE(MAG_MODE)) {
ENABLE_FLIGHT_MODE(MAG_MODE);
magHold = DECIDEGREES_TO_DEGREES(attitude.values.yaw);
}
} else {
DISABLE_FLIGHT_MODE(MAG_MODE);
}
if (IS_RC_MODE_ACTIVE(BOXHEADFREE)) {
if (!FLIGHT_MODE(HEADFREE_MODE)) {
ENABLE_FLIGHT_MODE(HEADFREE_MODE);
}
} else {
DISABLE_FLIGHT_MODE(HEADFREE_MODE);
}
if (IS_RC_MODE_ACTIVE(BOXHEADADJ)) {
headFreeModeHold = DECIDEGREES_TO_DEGREES(attitude.values.yaw); // acquire new heading
}
}
#endif
#ifdef GPS
if (sensors(SENSOR_GPS)) {
updateGpsWaypointsAndMode();
}
#endif
if (IS_RC_MODE_ACTIVE(BOXPASSTHRU)) {
ENABLE_FLIGHT_MODE(PASSTHRU_MODE);
} else {
DISABLE_FLIGHT_MODE(PASSTHRU_MODE);
}
if (mixerConfig()->mixerMode == MIXER_FLYING_WING || mixerConfig()->mixerMode == MIXER_AIRPLANE) {
DISABLE_FLIGHT_MODE(HEADFREE_MODE);
}
#ifdef TELEMETRY
if (feature(FEATURE_TELEMETRY)) {
if ((!telemetryConfig()->telemetry_switch && ARMING_FLAG(ARMED)) ||
(telemetryConfig()->telemetry_switch && IS_RC_MODE_ACTIVE(BOXTELEMETRY))) {
releaseSharedTelemetryPorts();
} else {
// the telemetry state must be checked immediately so that shared serial ports are released.
telemetryCheckState();
mspAllocateSerialPorts();
}
}
#endif
}
void gpsThread(void)
{
/* Extra delay for at least 2 seconds after booting to give GPS time to initialise */
if (!isMPUSoftReset() && (millis() < GPS_BOOT_DELAY)) {
sensorsClear(SENSOR_GPS);
DISABLE_STATE(GPS_FIX);
return;
}
#ifdef USE_FAKE_GPS
gpsFakeGPSUpdate();
#else
// Serial-based GPS
if ((gpsProviders[gpsState.gpsConfig->provider].type == GPS_TYPE_SERIAL) && (gpsState.gpsPort != NULL)) {
switch (gpsState.state) {
default:
case GPS_INITIALIZING:
if ((millis() - gpsState.lastStateSwitchMs) >= GPS_INIT_DELAY) {
// Reset internals
DISABLE_STATE(GPS_FIX);
gpsSol.fixType = GPS_NO_FIX;
gpsState.hwVersion = 0;
gpsState.autoConfigStep = 0;
gpsState.autoConfigPosition = 0;
gpsState.autoBaudrateIndex = 0;
// Reset solution
gpsResetSolution();
// Call protocol handler - switch to next state is done there
gpsHandleProtocol();
}
break;
case GPS_CHANGE_BAUD:
// Call protocol handler - switch to next state is done there
gpsHandleProtocol();
break;
case GPS_CHECK_VERSION:
case GPS_CONFIGURE:
case GPS_RECEIVING_DATA:
gpsHandleProtocol();
if ((millis() - gpsState.lastMessageMs) > GPS_TIMEOUT) {
// Check for GPS timeout
sensorsClear(SENSOR_GPS);
DISABLE_STATE(GPS_FIX);
gpsSol.fixType = GPS_NO_FIX;
gpsSetState(GPS_LOST_COMMUNICATION);
}
break;
case GPS_LOST_COMMUNICATION:
gpsStats.timeouts++;
// Handle autobaud - switch to next port baud rate
if (gpsState.gpsConfig->autoBaud != GPS_AUTOBAUD_OFF) {
gpsState.baudrateIndex++;
gpsState.baudrateIndex %= GPS_BAUDRATE_COUNT;
}
gpsSetState(GPS_INITIALIZING);
break;
}
}
// Driver-based GPS (I2C)
else if (gpsProviders[gpsState.gpsConfig->provider].type == GPS_TYPE_BUS) {
switch (gpsState.state) {
default:
case GPS_INITIALIZING:
// Detect GPS unit
if ((millis() - gpsState.lastStateSwitchMs) >= GPS_BUS_INIT_DELAY) {
gpsResetSolution();
if (gpsProviders[gpsState.gpsConfig->provider].detect && gpsProviders[gpsState.gpsConfig->provider].detect()) {
gpsState.hwVersion = 0;
gpsState.autoConfigStep = 0;
gpsState.autoConfigPosition = 0;
gpsState.lastMessageMs = millis();
sensorsSet(SENSOR_GPS);
gpsSetState(GPS_CHANGE_BAUD);
}
else {
sensorsClear(SENSOR_GPS);
}
}
break;
case GPS_CHANGE_BAUD:
case GPS_CHECK_VERSION:
case GPS_CONFIGURE:
case GPS_RECEIVING_DATA:
gpsHandleProtocol();
if (millis() - gpsState.lastMessageMs > GPS_TIMEOUT) {
// remove GPS from capability
gpsSetState(GPS_LOST_COMMUNICATION);
}
break;
case GPS_LOST_COMMUNICATION:
// No valid data from GPS unit, cause re-init and re-detection
gpsStats.timeouts++;
DISABLE_STATE(GPS_FIX);
gpsSol.fixType = GPS_NO_FIX;
gpsSetState(GPS_INITIALIZING);
break;
}
}
else {
// GPS_TYPE_NA
}
#endif
}
void mixerUsePWMIOConfiguration(pwmIOConfiguration_t *pwmIOConfiguration)
{
int i;
motorCount = 0;
servoCount = pwmIOConfiguration->servoCount;
if (currentMixerMode == MIXER_CUSTOM || currentMixerMode == MIXER_CUSTOM_TRI || currentMixerMode == MIXER_CUSTOM_AIRPLANE) {
// load custom mixer into currentMixer
for (i = 0; i < MAX_SUPPORTED_MOTORS; i++) {
// check if done
if (customMixers[i].throttle == 0.0f)
break;
currentMixer[i] = customMixers[i];
motorCount++;
}
} else {
motorCount = mixers[currentMixerMode].motorCount;
// copy motor-based mixers
if (mixers[currentMixerMode].motor) {
for (i = 0; i < motorCount; i++)
currentMixer[i] = mixers[currentMixerMode].motor[i];
}
}
if (useServo) {
servoRuleCount = servoMixers[currentMixerMode].servoRuleCount;
if (servoMixers[currentMixerMode].rule) {
for (i = 0; i < servoRuleCount; i++)
currentServoMixer[i] = servoMixers[currentMixerMode].rule[i];
}
}
// in 3D mode, mixer gain has to be halved
if (feature(FEATURE_3D)) {
if (motorCount > 1) {
for (i = 0; i < motorCount; i++) {
currentMixer[i].pitch *= 0.5f;
currentMixer[i].roll *= 0.5f;
currentMixer[i].yaw *= 0.5f;
}
}
}
// set flag that we're on something with wings
if (currentMixerMode == MIXER_FLYING_WING ||
currentMixerMode == MIXER_AIRPLANE ||
currentMixerMode == MIXER_CUSTOM_AIRPLANE
) {
ENABLE_STATE(FIXED_WING);
if (currentMixerMode == MIXER_CUSTOM_AIRPLANE) {
loadCustomServoMixer();
}
} else {
DISABLE_STATE(FIXED_WING);
if (currentMixerMode == MIXER_CUSTOM_TRI) {
loadCustomServoMixer();
}
}
mixerResetDisarmedMotors();
}
void onGpsNewData(void)
{
int axis;
static uint32_t nav_loopTimer;
uint16_t speed;
if (!(STATE(GPS_FIX) && GPS_numSat >= 5)) {
return;
}
if (!ARMING_FLAG(ARMED))
DISABLE_STATE(GPS_FIX_HOME);
if (!STATE(GPS_FIX_HOME) && ARMING_FLAG(ARMED))
GPS_reset_home_position();
// Apply moving average filter to GPS data
#if defined(GPS_FILTERING)
GPS_filter_index = (GPS_filter_index + 1) % GPS_FILTER_VECTOR_LENGTH;
for (axis = 0; axis < 2; axis++) {
GPS_read[axis] = GPS_coord[axis]; // latest unfiltered data is in GPS_latitude and GPS_longitude
GPS_degree[axis] = GPS_read[axis] / 10000000; // get the degree to assure the sum fits to the int32_t
// How close we are to a degree line ? its the first three digits from the fractions of degree
// later we use it to Check if we are close to a degree line, if yes, disable averaging,
fraction3[axis] = (GPS_read[axis] - GPS_degree[axis] * 10000000) / 10000;
GPS_filter_sum[axis] -= GPS_filter[axis][GPS_filter_index];
GPS_filter[axis][GPS_filter_index] = GPS_read[axis] - (GPS_degree[axis] * 10000000);
GPS_filter_sum[axis] += GPS_filter[axis][GPS_filter_index];
GPS_filtered[axis] = GPS_filter_sum[axis] / GPS_FILTER_VECTOR_LENGTH + (GPS_degree[axis] * 10000000);
if (nav_mode == NAV_MODE_POSHOLD) { // we use gps averaging only in poshold mode...
if (fraction3[axis] > 1 && fraction3[axis] < 999)
GPS_coord[axis] = GPS_filtered[axis];
}
}
#endif
//
// Calculate time delta for navigation loop, range 0-1.0f, in seconds
//
// Time for calculating x,y speed and navigation pids
dTnav = (float)(millis() - nav_loopTimer) / 1000.0f;
nav_loopTimer = millis();
// prevent runup from bad GPS
dTnav = min(dTnav, 1.0f);
GPS_calculateDistanceAndDirectionToHome();
// calculate the current velocity based on gps coordinates continously to get a valid speed at the moment when we start navigating
GPS_calc_velocity();
if (FLIGHT_MODE(GPS_HOLD_MODE) || FLIGHT_MODE(GPS_HOME_MODE)) {
// we are navigating
// gps nav calculations, these are common for nav and poshold
GPS_distance_cm_bearing(&GPS_coord[LAT], &GPS_coord[LON], &GPS_WP[LAT], &GPS_WP[LON], &wp_distance, &target_bearing);
GPS_calc_location_error(&GPS_WP[LAT], &GPS_WP[LON], &GPS_coord[LAT], &GPS_coord[LON]);
switch (nav_mode) {
case NAV_MODE_POSHOLD:
// Desired output is in nav_lat and nav_lon where 1deg inclination is 100
GPS_calc_poshold();
break;
case NAV_MODE_WP:
speed = GPS_calc_desired_speed(gpsProfile->nav_speed_max, NAV_SLOW_NAV); // slow navigation
// use error as the desired rate towards the target
// Desired output is in nav_lat and nav_lon where 1deg inclination is 100
GPS_calc_nav_rate(speed);
// Tail control
if (gpsProfile->nav_controls_heading) {
if (NAV_TAIL_FIRST) {
magHold = wrap_18000(nav_bearing - 18000) / 100;
} else {
magHold = nav_bearing / 100;
}
}
// Are we there yet ?(within x meters of the destination)
if ((wp_distance <= gpsProfile->gps_wp_radius) || check_missed_wp()) { // if yes switch to poshold mode
nav_mode = NAV_MODE_POSHOLD;
if (NAV_SET_TAKEOFF_HEADING) {
magHold = nav_takeoff_bearing;
}
}
break;
default:
break;
}
} //end of gps calcs
}
static bool gpsNewFrameNMEA(char c)
{
typedef struct gpsdata_s {
int32_t latitude;
int32_t longitude;
uint8_t numSat;
uint16_t altitude;
uint16_t speed;
uint16_t ground_course;
} gpsdata_t;
static gpsdata_t gps_Msg;
uint8_t frameOK = 0;
static uint8_t param = 0, offset = 0, parity = 0;
static char string[15];
static uint8_t checksum_param, gps_frame = NO_FRAME;
switch (c) {
case '$':
param = 0;
offset = 0;
parity = 0;
break;
case ',':
case '*':
string[offset] = 0;
if (param == 0) { //frame identification
gps_frame = NO_FRAME;
if (string[0] == 'G' && string[1] == 'P' && string[2] == 'G' && string[3] == 'G' && string[4] == 'A')
gps_frame = FRAME_GGA;
if (string[0] == 'G' && string[1] == 'P' && string[2] == 'R' && string[3] == 'M' && string[4] == 'C')
gps_frame = FRAME_RMC;
}
switch (gps_frame) {
case FRAME_GGA: //************* GPGGA FRAME parsing
switch (param) {
// case 1: // Time information
// break;
case 2:
gps_Msg.latitude = GPS_coord_to_degrees(string);
break;
case 3:
if (string[0] == 'S')
gps_Msg.latitude *= -1;
break;
case 4:
gps_Msg.longitude = GPS_coord_to_degrees(string);
break;
case 5:
if (string[0] == 'W')
gps_Msg.longitude *= -1;
break;
case 6:
if (string[0] > '0') {
ENABLE_STATE(GPS_FIX);
} else {
DISABLE_STATE(GPS_FIX);
}
break;
case 7:
gps_Msg.numSat = grab_fields(string, 0);
break;
case 9:
gps_Msg.altitude = grab_fields(string, 0); // altitude in meters added by Mis
break;
}
break;
case FRAME_RMC: //************* GPRMC FRAME parsing
switch (param) {
case 7:
gps_Msg.speed = ((grab_fields(string, 1) * 5144L) / 1000L); // speed in cm/s added by Mis
break;
case 8:
gps_Msg.ground_course = (grab_fields(string, 1)); // ground course deg * 10
break;
}
break;
}
param++;
offset = 0;
if (c == '*')
checksum_param = 1;
else
parity ^= c;
break;
case '\r':
case '\n':
if (checksum_param) { //parity checksum
uint8_t checksum = 16 * ((string[0] >= 'A') ? string[0] - 'A' + 10 : string[0] - '0') + ((string[1] >= 'A') ? string[1] - 'A' + 10 : string[1] - '0');
if (checksum == parity) {
switch (gps_frame) {
case FRAME_GGA:
frameOK = 1;
if (STATE(GPS_FIX)) {
GPS_coord[LAT] = gps_Msg.latitude;
GPS_coord[LON] = gps_Msg.longitude;
GPS_numSat = gps_Msg.numSat;
GPS_altitude = gps_Msg.altitude;
}
break;
case FRAME_RMC:
GPS_speed = gps_Msg.speed;
GPS_ground_course = gps_Msg.ground_course;
break;
} // end switch
}
}
checksum_param = 0;
break;
default:
if (offset < 15)
string[offset++] = c;
if (!checksum_param)
parity ^= c;
}
return frameOK;
}