// failsafe_gcs_check - check for ground station failsafe
void Copter::failsafe_gcs_check()
{
uint32_t last_gcs_update_ms;
// return immediately if gcs failsafe is disabled, gcs has never been connected or we are not overriding rc controls from the gcs and we are not in guided mode
// this also checks to see if we have a GCS failsafe active, if we do, then must continue to process the logic for recovery from this state.
if ((!failsafe.gcs)&&(g.failsafe_gcs == FS_GCS_DISABLED || failsafe.last_heartbeat_ms == 0 || (!failsafe.rc_override_active && control_mode != GUIDED))) {
return;
}
// calc time since last gcs update
// note: this only looks at the heartbeat from the device id set by g.sysid_my_gcs
last_gcs_update_ms = millis() - failsafe.last_heartbeat_ms;
// check if all is well
if (last_gcs_update_ms < FS_GCS_TIMEOUT_MS) {
// check for recovery from gcs failsafe
if (failsafe.gcs) {
failsafe_gcs_off_event();
set_failsafe_gcs(false);
}
return;
}
// do nothing if gcs failsafe already triggered or motors disarmed
if (failsafe.gcs || !motors->armed()) {
return;
}
// GCS failsafe event has occurred
// update state, log to dataflash
set_failsafe_gcs(true);
Log_Write_Error(ERROR_SUBSYSTEM_FAILSAFE_GCS, ERROR_CODE_FAILSAFE_OCCURRED);
// clear overrides so that RC control can be regained with radio.
hal.rcin->clear_overrides();
failsafe.rc_override_active = false;
if (should_disarm_on_failsafe()) {
init_disarm_motors();
} else {
if (control_mode == AUTO && g.failsafe_gcs == FS_GCS_ENABLED_CONTINUE_MISSION) {
// continue mission
} else if (g.failsafe_gcs == FS_GCS_ENABLED_ALWAYS_SMARTRTL_OR_RTL) {
set_mode_SmartRTL_or_RTL(MODE_REASON_GCS_FAILSAFE);
} else if (g.failsafe_gcs == FS_GCS_ENABLED_ALWAYS_SMARTRTL_OR_LAND) {
set_mode_SmartRTL_or_land_with_pause(MODE_REASON_GCS_FAILSAFE);
} else { // g.failsafe_gcs == FS_GCS_ENABLED_ALWAYS_RTL
set_mode_RTL_or_land_with_pause(MODE_REASON_GCS_FAILSAFE);
}
}
}
// failsafe_gcs_check - check for ground station failsafe
void Copter::failsafe_gcs_check()
{
uint32_t last_gcs_update_ms;
// return immediately if gcs failsafe is disabled, gcs has never been connected or we are not overriding rc controls from the gcs and we are not in guided mode
// this also checks to see if we have a GCS failsafe active, if we do, then must continue to process the logic for recovery from this state.
if ((!failsafe.gcs)&&(g.failsafe_gcs == FS_GCS_DISABLED || failsafe.last_heartbeat_ms == 0 || (!failsafe.rc_override_active && control_mode != GUIDED))) {
return;
}
// calc time since last gcs update
// note: this only looks at the heartbeat from the device id set by g.sysid_my_gcs
last_gcs_update_ms = millis() - failsafe.last_heartbeat_ms;
// check if all is well
if (last_gcs_update_ms < FS_GCS_TIMEOUT_MS) {
// check for recovery from gcs failsafe
if (failsafe.gcs) {
failsafe_gcs_off_event();
set_failsafe_gcs(false);
}
return;
}
// do nothing if gcs failsafe already triggered or motors disarmed
if (failsafe.gcs || !motors.armed()) {
return;
}
// GCS failsafe event has occured
// update state, log to dataflash
set_failsafe_gcs(true);
Log_Write_Error(ERROR_SUBSYSTEM_FAILSAFE_GCS, ERROR_CODE_FAILSAFE_OCCURRED);
// clear overrides so that RC control can be regained with radio.
hal.rcin->clear_overrides();
failsafe.rc_override_active = false;
// This is how to handle a failsafe.
// use the throttle failsafe setting to decide what to do
switch(control_mode) {
case STABILIZE:
case ACRO:
case SPORT:
// if throttle is zero disarm motors
if (ap.throttle_zero || ap.land_complete) {
init_disarm_motors();
}else if(home_distance > wp_nav.get_wp_radius()) {
// switch to RTL or if that fails, LAND
set_mode_RTL_or_land_with_pause();
}else{
// We have no GPS or are very close to home so we will land
set_mode_land_with_pause();
}
break;
case AUTO:
// if mission has not started AND vehicle is landed, disarm motors
if (!ap.auto_armed && ap.land_complete) {
init_disarm_motors();
// if g.failsafe_gcs is 1 do RTL, 2 means continue with the mission
} else if (g.failsafe_gcs == FS_GCS_ENABLED_ALWAYS_RTL) {
if (home_distance > wp_nav.get_wp_radius()) {
// switch to RTL or if that fails, LAND
set_mode_RTL_or_land_with_pause();
}else{
// We are very close to home so we will land
set_mode_land_with_pause();
}
}
// if failsafe_throttle is 2 (i.e. FS_THR_ENABLED_CONTINUE_MISSION) no need to do anything
break;
default:
// used for AltHold, Guided, Loiter, RTL, Circle, Drift, Sport, Flip, Autotune, PosHold
// if landed disarm
if (ap.land_complete) {
init_disarm_motors();
} else if (home_distance > wp_nav.get_wp_radius()) {
// switch to RTL or if that fails, LAND
set_mode_RTL_or_land_with_pause();
}else{
// We have no GPS or are very close to home so we will land
set_mode_land_with_pause();
}
break;
}
}
