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ardupilot/ArduPlane/ArduPlane.cpp

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
/*
Lead developer: Andrew Tridgell
Authors: Doug Weibel, Jose Julio, Jordi Munoz, Jason Short, Randy Mackay, Pat Hickey, John Arne Birkeland, Olivier Adler, Amilcar Lucas, Gregory Fletcher, Paul Riseborough, Brandon Jones, Jon Challinger
Thanks to: Chris Anderson, Michael Oborne, Paul Mather, Bill Premerlani, James Cohen, JB from rotorFX, Automatik, Fefenin, Peter Meister, Remzibi, Yury Smirnov, Sandro Benigno, Max Levine, Roberto Navoni, Lorenz Meier, Yury MonZon
Please contribute your ideas! See http://dev.ardupilot.com for details
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Plane.h"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpmf-conversions"
#define SCHED_TASK(func) AP_HAL_CLASSPROC_VOID(&plane, &Plane::func)
/*
scheduler table - all regular tasks are listed here, along with how
often they should be called (in 20ms units) and the maximum time
they are expected to take (in microseconds)
*/
const AP_Scheduler::Task Plane::scheduler_tasks[] PROGMEM = {
{ SCHED_TASK(read_radio), 1, 700 }, // 0
{ SCHED_TASK(check_short_failsafe), 1, 1000 },
{ SCHED_TASK(ahrs_update), 1, 6400 },
{ SCHED_TASK(update_speed_height), 1, 1600 },
{ SCHED_TASK(update_flight_mode), 1, 1400 },
{ SCHED_TASK(stabilize), 1, 3500 },
{ SCHED_TASK(set_servos), 1, 1600 },
{ SCHED_TASK(read_control_switch), 7, 1000 },
{ SCHED_TASK(gcs_retry_deferred), 1, 1000 },
{ SCHED_TASK(update_GPS_50Hz), 1, 2500 },
{ SCHED_TASK(update_GPS_10Hz), 5, 2500 }, // 10
{ SCHED_TASK(navigate), 5, 3000 },
{ SCHED_TASK(update_compass), 5, 1200 },
{ SCHED_TASK(read_airspeed), 5, 1200 },
{ SCHED_TASK(update_alt), 5, 3400 },
{ SCHED_TASK(adjust_altitude_target), 5, 1000 },
{ SCHED_TASK(obc_fs_check), 5, 1000 },
{ SCHED_TASK(gcs_update), 1, 1700 },
{ SCHED_TASK(gcs_data_stream_send), 1, 3000 },
{ SCHED_TASK(update_events), 1, 1500 }, // 20
{ SCHED_TASK(check_usb_mux), 5, 300 },
{ SCHED_TASK(read_battery), 5, 1000 },
{ SCHED_TASK(compass_accumulate), 1, 1500 },
{ SCHED_TASK(barometer_accumulate), 1, 900 },
{ SCHED_TASK(update_notify), 1, 300 },
{ SCHED_TASK(read_rangefinder), 1, 500 },
#if OPTFLOW == ENABLED
{ SCHED_TASK(update_optical_flow), 1, 500 },
#endif
{ SCHED_TASK(one_second_loop), 50, 1000 },
{ SCHED_TASK(check_long_failsafe), 15, 1000 },
{ SCHED_TASK(read_receiver_rssi), 5, 1000 },
{ SCHED_TASK(airspeed_ratio_update), 50, 1000 }, // 30
{ SCHED_TASK(update_mount), 1, 1500 },
{ SCHED_TASK(log_perf_info), 500, 1000 },
{ SCHED_TASK(compass_save), 3000, 2500 },
{ SCHED_TASK(update_logging1), 5, 1700 },
{ SCHED_TASK(update_logging2), 5, 1700 },
#if FRSKY_TELEM_ENABLED == ENABLED
{ SCHED_TASK(frsky_telemetry_send), 10, 100 },
#endif
{ SCHED_TASK(terrain_update), 5, 500 },
};
#pragma GCC diagnostic pop
void Plane::setup()
{
cliSerial = hal.console;
// load the default values of variables listed in var_info[]
AP_Param::setup_sketch_defaults();
AP_Notify::flags.failsafe_battery = false;
notify.init(false);
rssi_analog_source = hal.analogin->channel(ANALOG_INPUT_NONE);
init_ardupilot();
// initialise the main loop scheduler
scheduler.init(&scheduler_tasks[0], sizeof(scheduler_tasks)/sizeof(scheduler_tasks[0]), NULL);
}
void Plane::loop()
{
// wait for an INS sample
ins.wait_for_sample();
uint32_t timer = hal.scheduler->micros();
delta_us_fast_loop = timer - fast_loopTimer_us;
G_Dt = delta_us_fast_loop * 1.0e-6f;
if (delta_us_fast_loop > G_Dt_max && fast_loopTimer_us != 0) {
G_Dt_max = delta_us_fast_loop;
}
if (delta_us_fast_loop < G_Dt_min || G_Dt_min == 0) {
G_Dt_min = delta_us_fast_loop;
}
fast_loopTimer_us = timer;
mainLoop_count++;
// tell the scheduler one tick has passed
scheduler.tick();
// run all the tasks that are due to run. Note that we only
// have to call this once per loop, as the tasks are scheduled
// in multiples of the main loop tick. So if they don't run on
// the first call to the scheduler they won't run on a later
// call until scheduler.tick() is called again
uint32_t remaining = (timer + 20000) - hal.scheduler->micros();
if (remaining > 19500) {
remaining = 19500;
}
scheduler.run(remaining);
}
// update AHRS system
void Plane::ahrs_update()
{
hal.util->set_soft_armed(arming.is_armed() &&
hal.util->safety_switch_state() != AP_HAL::Util::SAFETY_DISARMED);
if (g.hil_mode == 1) {
// update hil before AHRS update
gcs_update();
}
ahrs.update();
if (should_log(MASK_LOG_ATTITUDE_FAST)) {
Log_Write_Attitude();
}
if (should_log(MASK_LOG_IMU))
Log_Write_IMU();
// calculate a scaled roll limit based on current pitch
roll_limit_cd = g.roll_limit_cd * cosf(ahrs.pitch);
pitch_limit_min_cd = aparm.pitch_limit_min_cd * fabsf(cosf(ahrs.roll));
// updated the summed gyro used for ground steering and
// auto-takeoff. Dot product of DCM.c with gyro vector gives earth
// frame yaw rate
steer_state.locked_course_err += ahrs.get_yaw_rate_earth() * G_Dt;
steer_state.locked_course_err = wrap_PI(steer_state.locked_course_err);
}
/*
update 50Hz speed/height controller
*/
void Plane::update_speed_height(void)
{
if (auto_throttle_mode) {
// Call TECS 50Hz update. Note that we call this regardless of
// throttle suppressed, as this needs to be running for
// takeoff detection
SpdHgt_Controller->update_50hz(tecs_hgt_afe());
}
}
/*
update camera mount
*/
void Plane::update_mount(void)
{
#if MOUNT == ENABLED
camera_mount.update();
#endif
#if CAMERA == ENABLED
camera.trigger_pic_cleanup();
#endif
}
/*
read and update compass
*/
void Plane::update_compass(void)
{
if (g.compass_enabled && compass.read()) {
ahrs.set_compass(&compass);
compass.learn_offsets();
if (should_log(MASK_LOG_COMPASS)) {
DataFlash.Log_Write_Compass(compass);
}
} else {
ahrs.set_compass(NULL);
}
}
/*
if the compass is enabled then try to accumulate a reading
*/
void Plane::compass_accumulate(void)
{
if (g.compass_enabled) {
compass.accumulate();
}
}
/*
try to accumulate a baro reading
*/
void Plane::barometer_accumulate(void)
{
barometer.accumulate();
}
/*
do 10Hz logging
*/
void Plane::update_logging1(void)
{
if (should_log(MASK_LOG_ATTITUDE_MED) && !should_log(MASK_LOG_ATTITUDE_FAST)) {
Log_Write_Attitude();
}
if (should_log(MASK_LOG_ATTITUDE_MED) && !should_log(MASK_LOG_IMU))
Log_Write_IMU();
}
/*
do 10Hz logging - part2
*/
void Plane::update_logging2(void)
{
if (should_log(MASK_LOG_CTUN))
Log_Write_Control_Tuning();
if (should_log(MASK_LOG_NTUN))
Log_Write_Nav_Tuning();
if (should_log(MASK_LOG_RC))
Log_Write_RC();
}
/*
check for OBC failsafe check
*/
void Plane::obc_fs_check(void)
{
#if OBC_FAILSAFE == ENABLED
// perform OBC failsafe checks
obc.check(OBC_MODE(control_mode), failsafe.last_heartbeat_ms, geofence_breached(), failsafe.last_valid_rc_ms);
#endif
}
/*
update aux servo mappings
*/
void Plane::update_aux(void)
{
if (!px4io_override_enabled) {
RC_Channel_aux::enable_aux_servos();
}
}
void Plane::one_second_loop()
{
if (should_log(MASK_LOG_CURRENT))
Log_Write_Current();
// send a heartbeat
gcs_send_message(MSG_HEARTBEAT);
// make it possible to change control channel ordering at runtime
set_control_channels();
// make it possible to change orientation at runtime
ahrs.set_orientation();
// sync MAVLink system ID
mavlink_system.sysid = g.sysid_this_mav;
update_aux();
// determine if we are flying or not
determine_is_flying();
// update notify flags
AP_Notify::flags.pre_arm_check = arming.pre_arm_checks(false);
AP_Notify::flags.pre_arm_gps_check = true;
AP_Notify::flags.armed = arming.is_armed() || arming.arming_required() == AP_Arming::NO;
#if AP_TERRAIN_AVAILABLE
if (should_log(MASK_LOG_GPS)) {
terrain.log_terrain_data(DataFlash);
}
#endif
// piggyback the status log entry on the MODE log entry flag
if (should_log(MASK_LOG_MODE)) {
Log_Write_Status();
}
ins.set_raw_logging(should_log(MASK_LOG_IMU_RAW));
}
void Plane::log_perf_info()
{
if (scheduler.debug() != 0) {
gcs_send_text_fmt(PSTR("G_Dt_max=%lu G_Dt_min=%lu\n"),
(unsigned long)G_Dt_max,
(unsigned long)G_Dt_min);
}
if (should_log(MASK_LOG_PM))
Log_Write_Performance();
G_Dt_max = 0;
G_Dt_min = 0;
resetPerfData();
}
void Plane::compass_save()
{
if (g.compass_enabled) {
compass.save_offsets();
}
}
void Plane::terrain_update(void)
{
#if AP_TERRAIN_AVAILABLE
terrain.update();
// tell the rangefinder our height, so it can go into power saving
// mode if available
float height;
if (terrain.height_above_terrain(height, true)) {
rangefinder.set_estimated_terrain_height(height);
}
#endif
}
/*
once a second update the airspeed calibration ratio
*/
void Plane::airspeed_ratio_update(void)
{
if (!airspeed.enabled() ||
gps.status() < AP_GPS::GPS_OK_FIX_3D ||
gps.ground_speed() < 4) {
// don't calibrate when not moving
return;
}
if (airspeed.get_airspeed() < aparm.airspeed_min &&
gps.ground_speed() < (uint32_t)aparm.airspeed_min) {
// don't calibrate when flying below the minimum airspeed. We
// check both airspeed and ground speed to catch cases where
// the airspeed ratio is way too low, which could lead to it
// never coming up again
return;
}
if (abs(ahrs.roll_sensor) > roll_limit_cd ||
ahrs.pitch_sensor > aparm.pitch_limit_max_cd ||
ahrs.pitch_sensor < pitch_limit_min_cd) {
// don't calibrate when going beyond normal flight envelope
return;
}
const Vector3f &vg = gps.velocity();
airspeed.update_calibration(vg);
gcs_send_airspeed_calibration(vg);
}
/*
read the GPS and update position
*/
void Plane::update_GPS_50Hz(void)
{
static uint32_t last_gps_reading[GPS_MAX_INSTANCES];
gps.update();
for (uint8_t i=0; i<gps.num_sensors(); i++) {
if (gps.last_message_time_ms(i) != last_gps_reading[i]) {
last_gps_reading[i] = gps.last_message_time_ms(i);
if (should_log(MASK_LOG_GPS)) {
Log_Write_GPS(i);
}
}
}
}
/*
read update GPS position - 10Hz update
*/
void Plane::update_GPS_10Hz(void)
{
// get position from AHRS
have_position = ahrs.get_position(current_loc);
static uint32_t last_gps_msg_ms;
if (gps.last_message_time_ms() != last_gps_msg_ms && gps.status() >= AP_GPS::GPS_OK_FIX_3D) {
last_gps_msg_ms = gps.last_message_time_ms();
if (ground_start_count > 1) {
ground_start_count--;
} else if (ground_start_count == 1) {
// We countdown N number of good GPS fixes
// so that the altitude is more accurate
// -------------------------------------
if (current_loc.lat == 0) {
ground_start_count = 5;
} else {
init_home();
// set system clock for log timestamps
hal.util->set_system_clock(gps.time_epoch_usec());
if (g.compass_enabled) {
// Set compass declination automatically
const Location &loc = gps.location();
compass.set_initial_location(loc.lat, loc.lng);
}
ground_start_count = 0;
}
}
// see if we've breached the geo-fence
geofence_check(false);
#if CAMERA == ENABLED
if (camera.update_location(current_loc) == true) {
do_take_picture();
}
#endif
if (!hal.util->get_soft_armed()) {
update_home();
}
// update wind estimate
ahrs.estimate_wind();
}
calc_gndspeed_undershoot();
}
/*
main handling for AUTO mode
*/
void Plane::handle_auto_mode(void)
{
uint8_t nav_cmd_id;
// we should be either running a mission or RTLing home
if (mission.state() == AP_Mission::MISSION_RUNNING) {
nav_cmd_id = mission.get_current_nav_cmd().id;
}else{
nav_cmd_id = auto_rtl_command.id;
}
switch(nav_cmd_id) {
case MAV_CMD_NAV_TAKEOFF:
takeoff_calc_roll();
takeoff_calc_pitch();
calc_throttle();
break;
case MAV_CMD_NAV_LAND:
calc_nav_roll();
calc_nav_pitch();
if (auto_state.land_complete) {
// during final approach constrain roll to the range
// allowed for level flight
nav_roll_cd = constrain_int32(nav_roll_cd, -g.level_roll_limit*100UL, g.level_roll_limit*100UL);
}
calc_throttle();
if (auto_state.land_complete) {
// we are in the final stage of a landing - force
// zero throttle
channel_throttle->servo_out = 0;
}
break;
default:
// we are doing normal AUTO flight, the special cases
// are for takeoff and landing
steer_state.hold_course_cd = -1;
auto_state.land_complete = false;
auto_state.land_sink_rate = 0;
calc_nav_roll();
calc_nav_pitch();
calc_throttle();
break;
}
}
/*
main flight mode dependent update code
*/
void Plane::update_flight_mode(void)
{
enum FlightMode effective_mode = control_mode;
if (control_mode == AUTO && g.auto_fbw_steer) {
effective_mode = FLY_BY_WIRE_A;
}
if (effective_mode != AUTO) {
// hold_course is only used in takeoff and landing
steer_state.hold_course_cd = -1;
}
switch (effective_mode)
{
case AUTO:
handle_auto_mode();
break;
case RTL:
case LOITER:
case GUIDED:
calc_nav_roll();
calc_nav_pitch();
calc_throttle();
break;
case TRAINING: {
training_manual_roll = false;
training_manual_pitch = false;
// if the roll is past the set roll limit, then
// we set target roll to the limit
if (ahrs.roll_sensor >= roll_limit_cd) {
nav_roll_cd = roll_limit_cd;
} else if (ahrs.roll_sensor <= -roll_limit_cd) {
nav_roll_cd = -roll_limit_cd;
} else {
training_manual_roll = true;
nav_roll_cd = 0;
}
// if the pitch is past the set pitch limits, then
// we set target pitch to the limit
if (ahrs.pitch_sensor >= aparm.pitch_limit_max_cd) {
nav_pitch_cd = aparm.pitch_limit_max_cd;
} else if (ahrs.pitch_sensor <= pitch_limit_min_cd) {
nav_pitch_cd = pitch_limit_min_cd;
} else {
training_manual_pitch = true;
nav_pitch_cd = 0;
}
if (fly_inverted()) {
nav_pitch_cd = -nav_pitch_cd;
}
break;
}
case ACRO: {
// handle locked/unlocked control
if (acro_state.locked_roll) {
nav_roll_cd = acro_state.locked_roll_err;
} else {
nav_roll_cd = ahrs.roll_sensor;
}
if (acro_state.locked_pitch) {
nav_pitch_cd = acro_state.locked_pitch_cd;
} else {
nav_pitch_cd = ahrs.pitch_sensor;
}
break;
}
case AUTOTUNE:
case FLY_BY_WIRE_A: {
// set nav_roll and nav_pitch using sticks
nav_roll_cd = channel_roll->norm_input() * roll_limit_cd;
nav_roll_cd = constrain_int32(nav_roll_cd, -roll_limit_cd, roll_limit_cd);
update_load_factor();
float pitch_input = channel_pitch->norm_input();
if (pitch_input > 0) {
nav_pitch_cd = pitch_input * aparm.pitch_limit_max_cd;
} else {
nav_pitch_cd = -(pitch_input * pitch_limit_min_cd);
}
adjust_nav_pitch_throttle();
nav_pitch_cd = constrain_int32(nav_pitch_cd, pitch_limit_min_cd, aparm.pitch_limit_max_cd.get());
if (fly_inverted()) {
nav_pitch_cd = -nav_pitch_cd;
}
if (failsafe.ch3_failsafe && g.short_fs_action == 2) {
// FBWA failsafe glide
nav_roll_cd = 0;
nav_pitch_cd = 0;
channel_throttle->servo_out = 0;
}
if (g.fbwa_tdrag_chan > 0) {
// check for the user enabling FBWA taildrag takeoff mode
bool tdrag_mode = (hal.rcin->read(g.fbwa_tdrag_chan-1) > 1700);
if (tdrag_mode && !auto_state.fbwa_tdrag_takeoff_mode) {
if (auto_state.highest_airspeed < g.takeoff_tdrag_speed1) {
auto_state.fbwa_tdrag_takeoff_mode = true;
gcs_send_text_P(SEVERITY_LOW, PSTR("FBWA tdrag mode\n"));
}
}
}
break;
}
case FLY_BY_WIRE_B:
// Thanks to Yury MonZon for the altitude limit code!
nav_roll_cd = channel_roll->norm_input() * roll_limit_cd;
nav_roll_cd = constrain_int32(nav_roll_cd, -roll_limit_cd, roll_limit_cd);
update_load_factor();
update_fbwb_speed_height();
break;
case CRUISE:
/*
in CRUISE mode we use the navigation code to control
roll when heading is locked. Heading becomes unlocked on
any aileron or rudder input
*/
if ((channel_roll->control_in != 0 ||
rudder_input != 0)) {
cruise_state.locked_heading = false;
cruise_state.lock_timer_ms = 0;
}
if (!cruise_state.locked_heading) {
nav_roll_cd = channel_roll->norm_input() * roll_limit_cd;
nav_roll_cd = constrain_int32(nav_roll_cd, -roll_limit_cd, roll_limit_cd);
update_load_factor();
} else {
calc_nav_roll();
}
update_fbwb_speed_height();
break;
case STABILIZE:
nav_roll_cd = 0;
nav_pitch_cd = 0;
// throttle is passthrough
break;
case CIRCLE:
// we have no GPS installed and have lost radio contact
// or we just want to fly around in a gentle circle w/o GPS,
// holding altitude at the altitude we set when we
// switched into the mode
nav_roll_cd = roll_limit_cd / 3;
update_load_factor();
calc_nav_pitch();
calc_throttle();
break;
case MANUAL:
// servo_out is for Sim control only
// ---------------------------------
channel_roll->servo_out = channel_roll->pwm_to_angle();
channel_pitch->servo_out = channel_pitch->pwm_to_angle();
steering_control.steering = steering_control.rudder = channel_rudder->pwm_to_angle();
break;
//roll: -13788.000, pitch: -13698.000, thr: 0.000, rud: -13742.000
case INITIALISING:
// handled elsewhere
break;
}
}
void Plane::update_navigation()
{
// wp_distance is in ACTUAL meters, not the *100 meters we get from the GPS
// ------------------------------------------------------------------------
// distance and bearing calcs only
switch(control_mode) {
case AUTO:
update_commands();
break;
case RTL:
if (g.rtl_autoland == 1 &&
!auto_state.checked_for_autoland &&
nav_controller->reached_loiter_target() &&
labs(altitude_error_cm) < 1000) {
// we've reached the RTL point, see if we have a landing sequence
jump_to_landing_sequence();
// prevent running the expensive jump_to_landing_sequence
// on every loop
auto_state.checked_for_autoland = true;
}
else if (g.rtl_autoland == 2 &&
!auto_state.checked_for_autoland) {
// Go directly to the landing sequence
jump_to_landing_sequence();
// prevent running the expensive jump_to_landing_sequence
// on every loop
auto_state.checked_for_autoland = true;
}
// fall through to LOITER
case LOITER:
case GUIDED:
// allow loiter direction to be changed in flight
if (g.loiter_radius < 0) {
loiter.direction = -1;
} else {
loiter.direction = 1;
}
update_loiter();
break;
case CRUISE:
update_cruise();
break;
case MANUAL:
case STABILIZE:
case TRAINING:
case INITIALISING:
case ACRO:
case FLY_BY_WIRE_A:
case AUTOTUNE:
case FLY_BY_WIRE_B:
case CIRCLE:
// nothing to do
break;
}
}
/*
set the flight stage
*/
void Plane::set_flight_stage(AP_SpdHgtControl::FlightStage fs)
{
//if just now entering land flight stage
if (fs == AP_SpdHgtControl::FLIGHT_LAND_APPROACH &&
flight_stage != AP_SpdHgtControl::FLIGHT_LAND_APPROACH) {
#if GEOFENCE_ENABLED == ENABLED
if (g.fence_autoenable == 1) {
if (! geofence_set_enabled(false, AUTO_TOGGLED)) {
gcs_send_text_P(SEVERITY_HIGH, PSTR("Disable fence failed (autodisable)"));
} else {
gcs_send_text_P(SEVERITY_HIGH, PSTR("Fence disabled (autodisable)"));
}
} else if (g.fence_autoenable == 2) {
if (! geofence_set_floor_enabled(false)) {
gcs_send_text_P(SEVERITY_HIGH, PSTR("Disable fence floor failed (autodisable)"));
} else {
gcs_send_text_P(SEVERITY_HIGH, PSTR("Fence floor disabled (auto disable)"));
}
}
#endif
}
flight_stage = fs;
}
void Plane::update_alt()
{
barometer.update();
if (should_log(MASK_LOG_IMU)) {
Log_Write_Baro();
}
geofence_check(true);
update_flight_stage();
}
/*
recalculate the flight_stage
*/
void Plane::update_flight_stage(void)
{
// Update the speed & height controller states
if (auto_throttle_mode && !throttle_suppressed) {
if (control_mode==AUTO) {
if (auto_state.takeoff_complete == false) {
set_flight_stage(AP_SpdHgtControl::FLIGHT_TAKEOFF);
} else if (mission.get_current_nav_cmd().id == MAV_CMD_NAV_LAND &&
auto_state.land_complete == true) {
set_flight_stage(AP_SpdHgtControl::FLIGHT_LAND_FINAL);
} else if (mission.get_current_nav_cmd().id == MAV_CMD_NAV_LAND) {
set_flight_stage(AP_SpdHgtControl::FLIGHT_LAND_APPROACH);
} else {
set_flight_stage(AP_SpdHgtControl::FLIGHT_NORMAL);
}
} else {
set_flight_stage(AP_SpdHgtControl::FLIGHT_NORMAL);
}
SpdHgt_Controller->update_pitch_throttle(relative_target_altitude_cm(),
target_airspeed_cm,
flight_stage,
auto_state.takeoff_pitch_cd,
throttle_nudge,
tecs_hgt_afe(),
aerodynamic_load_factor);
if (should_log(MASK_LOG_TECS)) {
Log_Write_TECS_Tuning();
}
}
// tell AHRS the airspeed to true airspeed ratio
airspeed.set_EAS2TAS(barometer.get_EAS2TAS());
}
/*
Do we think we are flying?
Probabilistic method where a bool is low-passed and considered a probability.
*/
void Plane::determine_is_flying(void)
{
float aspeed;
bool isFlyingBool;
bool airspeedMovement = ahrs.airspeed_estimate(&aspeed) && (aspeed >= 5);
// If we don't have a GPS lock then don't use GPS for this test
bool gpsMovement = (gps.status() < AP_GPS::GPS_OK_FIX_2D ||
gps.ground_speed() >= 5);
if (hal.util->get_soft_armed()) {
// when armed, we need overwhelming evidence that we ARE NOT flying
isFlyingBool = airspeedMovement || gpsMovement;
/*
make is_flying() more accurate for landing approach
*/
if (flight_stage == AP_SpdHgtControl::FLIGHT_LAND_APPROACH &&
fabsf(auto_state.land_sink_rate) > 0.2f) {
isFlyingBool = true;
}
} else {
// when disarmed, we need overwhelming evidence that we ARE flying
isFlyingBool = airspeedMovement && gpsMovement;
}
// low-pass the result.
isFlyingProbability = (0.6f * isFlyingProbability) + (0.4f * (float)isFlyingBool);
/*
update last_flying_ms so we always know how long we have not
been flying for. This helps for crash detection and auto-disarm
*/
if (is_flying()) {
auto_state.last_flying_ms = hal.scheduler->millis();
}
}
/*
return true if we think we are flying. This is a probabilistic
estimate, and needs to be used very carefully. Each use case needs
to be thought about individually.
*/
bool Plane::is_flying(void)
{
if (hal.util->get_soft_armed()) {
// when armed, assume we're flying unless we probably aren't
return (isFlyingProbability >= 0.1f);
}
// when disarmed, assume we're not flying unless we probably are
return (isFlyingProbability >= 0.9f);
}
#if OPTFLOW == ENABLED
// called at 50hz
void Plane::update_optical_flow(void)
{
static uint32_t last_of_update = 0;
// exit immediately if not enabled
if (!optflow.enabled()) {
return;
}
// read from sensor
optflow.update();
// write to log and send to EKF if new data has arrived
if (optflow.last_update() != last_of_update) {
last_of_update = optflow.last_update();
uint8_t flowQuality = optflow.quality();
Vector2f flowRate = optflow.flowRate();
Vector2f bodyRate = optflow.bodyRate();
ahrs.writeOptFlowMeas(flowQuality, flowRate, bodyRate, last_of_update);
Log_Write_Optflow();
}
}
#endif
/*
compatibility with old pde style build
*/
void setup(void);
void loop(void);
void setup(void)
{
plane.setup();
}
void loop(void)
{
plane.loop();
}
AP_HAL_MAIN();
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