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navigator_main.cpp
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/****************************************************************************
*
* Copyright (c) 2013-2017 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file navigator_main.cpp
*
* Handles mission items, geo fencing and failsafe navigation behavior.
* Published the position setpoint triplet for the position controller.
*
* @author Lorenz Meier <[email protected]>
* @author Jean Cyr <[email protected]>
* @author Julian Oes <[email protected]>
* @author Anton Babushkin <[email protected]>
* @author Thomas Gubler <[email protected]>
*/
#include "navigator.h"
#include <float.h>
#include <sys/stat.h>
#include <dataman/dataman.h>
#include <drivers/drv_hrt.h>
#include <lib/ecl/geo/geo.h>
#include <lib/mathlib/mathlib.h>
#include <px4_platform_common/px4_config.h>
#include <px4_platform_common/defines.h>
#include <px4_platform_common/posix.h>
#include <px4_platform_common/tasks.h>
#include <systemlib/mavlink_log.h>
/**
* navigator app start / stop handling function
*
* @ingroup apps
*/
extern "C" __EXPORT int navigator_main(int argc, char *argv[]);
#define GEOFENCE_CHECK_INTERVAL 200000
using namespace time_literals;
namespace navigator
{
Navigator *g_navigator;
}
Navigator::Navigator() :
ModuleParams(nullptr),
_loop_perf(perf_alloc(PC_ELAPSED, "navigator")),
_geofence(this),
_mission(this),
_loiter(this),
_takeoff(this),
_land(this),
_precland(this),
_rtl(this),
_rcLoss(this),
_dataLinkLoss(this),
_engineFailure(this),
_gpsFailure(this),
_follow_target(this)
{
/* Create a list of our possible navigation types */
_navigation_mode_array[0] = &_mission;
_navigation_mode_array[1] = &_loiter;
_navigation_mode_array[2] = &_rtl;
_navigation_mode_array[3] = &_dataLinkLoss;
_navigation_mode_array[4] = &_engineFailure;
_navigation_mode_array[5] = &_gpsFailure;
_navigation_mode_array[6] = &_rcLoss;
_navigation_mode_array[7] = &_takeoff;
_navigation_mode_array[8] = &_land;
_navigation_mode_array[9] = &_precland;
_navigation_mode_array[10] = &_follow_target;
_handle_back_trans_dec_mss = param_find("VT_B_DEC_MSS");
_handle_reverse_delay = param_find("VT_B_REV_DEL");
_local_pos_sub = orb_subscribe(ORB_ID(vehicle_local_position));
reset_triplets();
}
Navigator::~Navigator()
{
orb_unsubscribe(_local_pos_sub);
}
void
Navigator::params_update()
{
updateParams();
if (_handle_back_trans_dec_mss != PARAM_INVALID) {
param_get(_handle_back_trans_dec_mss, &_param_back_trans_dec_mss);
}
if (_handle_reverse_delay != PARAM_INVALID) {
param_get(_handle_reverse_delay, &_param_reverse_delay);
}
}
void
Navigator::run()
{
bool have_geofence_position_data = false;
/* Try to load the geofence:
* if /fs/microsd/etc/geofence.txt load from this file */
struct stat buffer;
if (stat(GEOFENCE_FILENAME, &buffer) == 0) {
PX4_INFO("Loading geofence from %s", GEOFENCE_FILENAME);
_geofence.loadFromFile(GEOFENCE_FILENAME);
}
params_update();
/* wakeup source(s) */
px4_pollfd_struct_t fds[1] = {};
/* Setup of loop */
fds[0].fd = _local_pos_sub;
fds[0].events = POLLIN;
/* rate-limit position subscription to 20 Hz / 50 ms */
orb_set_interval(_local_pos_sub, 50);
hrt_abstime last_geofence_check = 0;
while (!should_exit()) {
/* wait for up to 1000ms for data */
int pret = px4_poll(&fds[0], (sizeof(fds) / sizeof(fds[0])), 1000);
if (pret == 0) {
/* Let the loop run anyway, don't do `continue` here. */
} else if (pret < 0) {
/* this is undesirable but not much we can do - might want to flag unhappy status */
PX4_ERR("poll error %d, %d", pret, errno);
px4_usleep(10000);
continue;
} else {
if (fds[0].revents & POLLIN) {
/* success, local pos is available */
orb_copy(ORB_ID(vehicle_local_position), _local_pos_sub, &_local_pos);
}
}
perf_begin(_loop_perf);
/* gps updated */
if (_gps_pos_sub.updated()) {
_gps_pos_sub.copy(&_gps_pos);
if (_geofence.getSource() == Geofence::GF_SOURCE_GPS) {
have_geofence_position_data = true;
}
}
/* global position updated */
if (_global_pos_sub.updated()) {
_global_pos_sub.copy(&_global_pos);
if (_geofence.getSource() == Geofence::GF_SOURCE_GLOBALPOS) {
have_geofence_position_data = true;
}
}
// check for parameter updates
if (_parameter_update_sub.updated()) {
// clear update
parameter_update_s pupdate;
_parameter_update_sub.copy(&pupdate);
// update parameters from storage
params_update();
}
_vstatus_sub.update(&_vstatus);
_land_detected_sub.update(&_land_detected);
_position_controller_status_sub.update();
_home_pos_sub.update(&_home_pos);
if (_vehicle_command_sub.updated()) {
vehicle_command_s cmd{};
_vehicle_command_sub.copy(&cmd);
if (cmd.command == vehicle_command_s::VEHICLE_CMD_DO_GO_AROUND) {
// DO_GO_AROUND is currently handled by the position controller (unacknowledged)
// TODO: move DO_GO_AROUND handling to navigator
publish_vehicle_command_ack(cmd, vehicle_command_s::VEHICLE_CMD_RESULT_ACCEPTED);
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_DO_REPOSITION) {
position_setpoint_triplet_s *rep = get_reposition_triplet();
position_setpoint_triplet_s *curr = get_position_setpoint_triplet();
// store current position as previous position and goal as next
rep->previous.yaw = get_global_position()->yaw;
rep->previous.lat = get_global_position()->lat;
rep->previous.lon = get_global_position()->lon;
rep->previous.alt = get_global_position()->alt;
rep->current.loiter_radius = get_loiter_radius();
rep->current.loiter_direction = 1;
rep->current.type = position_setpoint_s::SETPOINT_TYPE_LOITER;
// If no argument for ground speed, use default value.
if (cmd.param1 <= 0 || !PX4_ISFINITE(cmd.param1)) {
rep->current.cruising_speed = get_cruising_speed();
} else {
rep->current.cruising_speed = cmd.param1;
}
rep->current.cruising_throttle = get_cruising_throttle();
rep->current.acceptance_radius = get_acceptance_radius();
// Go on and check which changes had been requested
if (PX4_ISFINITE(cmd.param4)) {
rep->current.yaw = cmd.param4;
rep->current.yaw_valid = true;
} else {
rep->current.yaw = NAN;
rep->current.yaw_valid = false;
}
if (PX4_ISFINITE(cmd.param5) && PX4_ISFINITE(cmd.param6)) {
// Position change with optional altitude change
rep->current.lat = (cmd.param5 < 1000) ? cmd.param5 : cmd.param5 / (double)1e7;
rep->current.lon = (cmd.param6 < 1000) ? cmd.param6 : cmd.param6 / (double)1e7;
if (PX4_ISFINITE(cmd.param7)) {
rep->current.alt = cmd.param7;
} else {
rep->current.alt = get_global_position()->alt;
}
} else if (PX4_ISFINITE(cmd.param7) && curr->current.valid
&& PX4_ISFINITE(curr->current.lat)
&& PX4_ISFINITE(curr->current.lon)) {
// Altitude without position change
rep->current.lat = curr->current.lat;
rep->current.lon = curr->current.lon;
rep->current.alt = cmd.param7;
} else {
// All three set to NaN - hold in current position
rep->current.lat = get_global_position()->lat;
rep->current.lon = get_global_position()->lon;
rep->current.alt = get_global_position()->alt;
}
rep->previous.valid = true;
rep->current.valid = true;
rep->next.valid = false;
// CMD_DO_REPOSITION is acknowledged by commander
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_NAV_TAKEOFF) {
position_setpoint_triplet_s *rep = get_takeoff_triplet();
// store current position as previous position and goal as next
rep->previous.yaw = get_global_position()->yaw;
rep->previous.lat = get_global_position()->lat;
rep->previous.lon = get_global_position()->lon;
rep->previous.alt = get_global_position()->alt;
rep->current.loiter_radius = get_loiter_radius();
rep->current.loiter_direction = 1;
rep->current.type = position_setpoint_s::SETPOINT_TYPE_TAKEOFF;
if (home_position_valid()) {
rep->current.yaw = cmd.param4;
rep->previous.valid = true;
} else {
rep->current.yaw = get_local_position()->yaw;
rep->previous.valid = false;
}
if (PX4_ISFINITE(cmd.param5) && PX4_ISFINITE(cmd.param6)) {
rep->current.lat = (cmd.param5 < 1000) ? cmd.param5 : cmd.param5 / (double)1e7;
rep->current.lon = (cmd.param6 < 1000) ? cmd.param6 : cmd.param6 / (double)1e7;
} else {
// If one of them is non-finite, reset both
rep->current.lat = (double)NAN;
rep->current.lon = (double)NAN;
}
rep->current.alt = cmd.param7;
rep->current.valid = true;
rep->next.valid = false;
// CMD_NAV_TAKEOFF is acknowledged by commander
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_DO_LAND_START) {
/* find NAV_CMD_DO_LAND_START in the mission and
* use MAV_CMD_MISSION_START to start the mission there
*/
if (_mission.land_start()) {
vehicle_command_s vcmd = {};
vcmd.command = vehicle_command_s::VEHICLE_CMD_MISSION_START;
vcmd.param1 = _mission.get_land_start_index();
publish_vehicle_cmd(&vcmd);
} else {
PX4_WARN("planned mission landing not available");
}
publish_vehicle_command_ack(cmd, vehicle_command_s::VEHICLE_CMD_RESULT_ACCEPTED);
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_MISSION_START) {
if (_mission_result.valid && PX4_ISFINITE(cmd.param1) && (cmd.param1 >= 0)) {
if (!_mission.set_current_mission_index(cmd.param1)) {
PX4_WARN("CMD_MISSION_START failed");
}
}
// CMD_MISSION_START is acknowledged by commander
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_DO_CHANGE_SPEED) {
if (cmd.param2 > FLT_EPSILON) {
// XXX not differentiating ground and airspeed yet
set_cruising_speed(cmd.param2);
} else {
set_cruising_speed();
/* if no speed target was given try to set throttle */
if (cmd.param3 > FLT_EPSILON) {
set_cruising_throttle(cmd.param3 / 100);
} else {
set_cruising_throttle();
}
}
// TODO: handle responses for supported DO_CHANGE_SPEED options?
publish_vehicle_command_ack(cmd, vehicle_command_s::VEHICLE_CMD_RESULT_ACCEPTED);
} else if (cmd.command == vehicle_command_s::VEHICLE_CMD_DO_SET_ROI
|| cmd.command == vehicle_command_s::VEHICLE_CMD_NAV_ROI
|| cmd.command == vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_LOCATION
|| cmd.command == vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_WPNEXT_OFFSET
|| cmd.command == vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_NONE) {
_vroi = {};
switch (cmd.command) {
case vehicle_command_s::VEHICLE_CMD_DO_SET_ROI:
case vehicle_command_s::VEHICLE_CMD_NAV_ROI:
_vroi.mode = cmd.param1;
break;
case vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_LOCATION:
_vroi.mode = vehicle_command_s::VEHICLE_ROI_LOCATION;
_vroi.lat = cmd.param5;
_vroi.lon = cmd.param6;
_vroi.alt = cmd.param7;
break;
case vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_WPNEXT_OFFSET:
_vroi.mode = vehicle_command_s::VEHICLE_ROI_WPNEXT;
_vroi.pitch_offset = (float)cmd.param5 * M_DEG_TO_RAD_F;
_vroi.roll_offset = (float)cmd.param6 * M_DEG_TO_RAD_F;
_vroi.yaw_offset = (float)cmd.param7 * M_DEG_TO_RAD_F;
break;
case vehicle_command_s::VEHICLE_CMD_DO_SET_ROI_NONE:
_vroi.mode = vehicle_command_s::VEHICLE_ROI_NONE;
break;
default:
_vroi.mode = vehicle_command_s::VEHICLE_ROI_NONE;
break;
}
_vroi.timestamp = hrt_absolute_time();
_vehicle_roi_pub.publish(_vroi);
publish_vehicle_command_ack(cmd, vehicle_command_s::VEHICLE_CMD_RESULT_ACCEPTED);
}
}
/* Check for traffic */
check_traffic();
/* Check geofence violation */
if (have_geofence_position_data &&
(_geofence.getGeofenceAction() != geofence_result_s::GF_ACTION_NONE) &&
(hrt_elapsed_time(&last_geofence_check) > GEOFENCE_CHECK_INTERVAL)) {
bool inside = _geofence.check(_global_pos, _gps_pos, _home_pos,
home_position_valid());
last_geofence_check = hrt_absolute_time();
have_geofence_position_data = false;
_geofence_result.timestamp = hrt_absolute_time();
_geofence_result.geofence_action = _geofence.getGeofenceAction();
_geofence_result.home_required = _geofence.isHomeRequired();
if (!inside) {
/* inform other apps via the mission result */
_geofence_result.geofence_violated = true;
/* Issue a warning about the geofence violation once */
if (!_geofence_violation_warning_sent) {
mavlink_log_critical(&_mavlink_log_pub, "Geofence violation");
_geofence_violation_warning_sent = true;
}
} else {
/* inform other apps via the mission result */
_geofence_result.geofence_violated = false;
/* Reset the _geofence_violation_warning_sent field */
_geofence_violation_warning_sent = false;
}
_geofence_result_pub.publish(_geofence_result);
}
/* Do stuff according to navigation state set by commander */
NavigatorMode *navigation_mode_new{nullptr};
switch (_vstatus.nav_state) {
case vehicle_status_s::NAVIGATION_STATE_AUTO_MISSION:
_pos_sp_triplet_published_invalid_once = false;
_mission.set_execution_mode(mission_result_s::MISSION_EXECUTION_MODE_NORMAL);
navigation_mode_new = &_mission;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_LOITER:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_loiter;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_RCRECOVER:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_rcLoss;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_RTL: {
_pos_sp_triplet_published_invalid_once = false;
const bool rtl_activated = _previous_nav_state != vehicle_status_s::NAVIGATION_STATE_AUTO_RTL;
switch (rtl_type()) {
case RTL::RTL_LAND: // use mission landing
case RTL::RTL_CLOSEST:
if (rtl_activated) {
if (rtl_type() == RTL::RTL_LAND) {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL LAND activated");
} else {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL Closest landing point activated");
}
}
// if RTL is set to use a mission landing and mission has a planned landing, then use MISSION to fly there directly
if (on_mission_landing() && !get_land_detected()->landed) {
_mission.set_execution_mode(mission_result_s::MISSION_EXECUTION_MODE_FAST_FORWARD);
navigation_mode_new = &_mission;
} else {
navigation_mode_new = &_rtl;
}
break;
case RTL::RTL_MISSION:
if (_mission.get_land_start_available() && !get_land_detected()->landed) {
// the mission contains a landing spot
_mission.set_execution_mode(mission_result_s::MISSION_EXECUTION_MODE_FAST_FORWARD);
if (_navigation_mode != &_mission) {
if (_navigation_mode == nullptr) {
// switching from an manual mode, go to landing if not already landing
if (!on_mission_landing()) {
start_mission_landing();
}
} else {
// switching from an auto mode, continue the mission from the closest item
_mission.set_closest_item_as_current();
}
}
if (rtl_activated) {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL Mission activated, continue mission");
}
navigation_mode_new = &_mission;
} else {
// fly the mission in reverse if switching from a non-manual mode
_mission.set_execution_mode(mission_result_s::MISSION_EXECUTION_MODE_REVERSE);
if ((_navigation_mode != nullptr && (_navigation_mode != &_rtl || _mission.get_mission_changed())) &&
(! _mission.get_mission_finished()) &&
(!get_land_detected()->landed)) {
// determine the closest mission item if switching from a non-mission mode, and we are either not already
// mission mode or the mission waypoints changed.
// The seconds condition is required so that when no mission was uploaded and one is available the closest
// mission item is determined and also that if the user changes the active mission index while rtl is active
// always that waypoint is tracked first.
if ((_navigation_mode != &_mission) && (rtl_activated || _mission.get_mission_waypoints_changed())) {
_mission.set_closest_item_as_current();
}
if (rtl_activated) {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL Mission activated, fly mission in reverse");
}
navigation_mode_new = &_mission;
} else {
if (rtl_activated) {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL Mission activated, fly to home");
}
navigation_mode_new = &_rtl;
}
}
break;
default:
if (rtl_activated) {
mavlink_and_console_log_info(get_mavlink_log_pub(), "RTL HOME activated");
}
navigation_mode_new = &_rtl;
break;
}
break;
}
case vehicle_status_s::NAVIGATION_STATE_AUTO_TAKEOFF:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_takeoff;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_LAND:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_land;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_PRECLAND:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_precland;
_precland.set_mode(PrecLandMode::Required);
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_RTGS:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_dataLinkLoss;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_LANDENGFAIL:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_engineFailure;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_LANDGPSFAIL:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_gpsFailure;
break;
case vehicle_status_s::NAVIGATION_STATE_AUTO_FOLLOW_TARGET:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = &_follow_target;
break;
case vehicle_status_s::NAVIGATION_STATE_MANUAL:
case vehicle_status_s::NAVIGATION_STATE_ACRO:
case vehicle_status_s::NAVIGATION_STATE_ALTCTL:
case vehicle_status_s::NAVIGATION_STATE_POSCTL:
case vehicle_status_s::NAVIGATION_STATE_DESCEND:
case vehicle_status_s::NAVIGATION_STATE_TERMINATION:
case vehicle_status_s::NAVIGATION_STATE_OFFBOARD:
case vehicle_status_s::NAVIGATION_STATE_STAB:
default:
_pos_sp_triplet_published_invalid_once = false;
navigation_mode_new = nullptr;
_can_loiter_at_sp = false;
break;
}
// update the vehicle status
_previous_nav_state = _vstatus.nav_state;
/* we have a new navigation mode: reset triplet */
if (_navigation_mode != navigation_mode_new) {
// We don't reset the triplet if we just did an auto-takeoff and are now
// going to loiter. Otherwise, we lose the takeoff altitude and end up lower
// than where we wanted to go.
//
// FIXME: a better solution would be to add reset where they are needed and remove
// this general reset here.
if (!(_navigation_mode == &_takeoff &&
navigation_mode_new == &_loiter)) {
reset_triplets();
}
}
_navigation_mode = navigation_mode_new;
/* iterate through navigation modes and set active/inactive for each */
for (unsigned int i = 0; i < NAVIGATOR_MODE_ARRAY_SIZE; i++) {
_navigation_mode_array[i]->run(_navigation_mode == _navigation_mode_array[i]);
}
/* if we landed and have not received takeoff setpoint then stay in idle */
if (_land_detected.landed &&
!((_vstatus.nav_state == vehicle_status_s::NAVIGATION_STATE_AUTO_TAKEOFF)
|| (_vstatus.nav_state == vehicle_status_s::NAVIGATION_STATE_AUTO_MISSION))) {
_pos_sp_triplet.current.type = position_setpoint_s::SETPOINT_TYPE_IDLE;
_pos_sp_triplet.current.valid = true;
_pos_sp_triplet.previous.valid = false;
_pos_sp_triplet.next.valid = false;
}
/* if nothing is running, set position setpoint triplet invalid once */
if (_navigation_mode == nullptr && !_pos_sp_triplet_published_invalid_once) {
_pos_sp_triplet_published_invalid_once = true;
reset_triplets();
}
if (_pos_sp_triplet_updated) {
publish_position_setpoint_triplet();
}
if (_mission_result_updated) {
publish_mission_result();
}
perf_end(_loop_perf);
}
}
int Navigator::task_spawn(int argc, char *argv[])
{
_task_id = px4_task_spawn_cmd("navigator",
SCHED_DEFAULT,
SCHED_PRIORITY_NAVIGATION,
1800,
(px4_main_t)&run_trampoline,
(char *const *)argv);
if (_task_id < 0) {
_task_id = -1;
return -errno;
}
return 0;
}
Navigator *Navigator::instantiate(int argc, char *argv[])
{
Navigator *instance = new Navigator();
if (instance == nullptr) {
PX4_ERR("alloc failed");
}
return instance;
}
int
Navigator::print_status()
{
PX4_INFO("Running");
_geofence.printStatus();
return 0;
}
void
Navigator::publish_position_setpoint_triplet()
{
// do not publish an invalid setpoint
if (!_pos_sp_triplet.current.valid) {
return;
}
_pos_sp_triplet.timestamp = hrt_absolute_time();
/* lazily publish the position setpoint triplet only once available */
_pos_sp_triplet_pub.publish(_pos_sp_triplet);
_pos_sp_triplet_updated = false;
}
float
Navigator::get_default_acceptance_radius()
{
return _param_nav_acc_rad.get();
}
float
Navigator::get_acceptance_radius()
{
return get_acceptance_radius(_param_nav_acc_rad.get());
}
float
Navigator::get_default_altitude_acceptance_radius()
{
if (get_vstatus()->vehicle_type == vehicle_status_s::VEHICLE_TYPE_FIXED_WING) {
return _param_nav_fw_alt_rad.get();
} else if (get_vstatus()->vehicle_type == vehicle_status_s::VEHICLE_TYPE_ROVER) {
return INFINITY;
} else {
float alt_acceptance_radius = _param_nav_mc_alt_rad.get();
const position_controller_status_s &pos_ctrl_status = _position_controller_status_sub.get();
if ((pos_ctrl_status.timestamp > _pos_sp_triplet.timestamp)
&& pos_ctrl_status.altitude_acceptance > alt_acceptance_radius) {
alt_acceptance_radius = pos_ctrl_status.altitude_acceptance;
}
return alt_acceptance_radius;
}
}
float
Navigator::get_altitude_acceptance_radius()
{
if (get_vstatus()->vehicle_type == vehicle_status_s::VEHICLE_TYPE_FIXED_WING) {
const position_setpoint_s &next_sp = get_position_setpoint_triplet()->next;
if (next_sp.type == position_setpoint_s::SETPOINT_TYPE_LAND && next_sp.valid) {
// Use separate (tighter) altitude acceptance for clean altitude starting point before landing
return _param_nav_fw_altl_rad.get();
}
}
return get_default_altitude_acceptance_radius();
}
float
Navigator::get_cruising_speed()
{
/* there are three options: The mission-requested cruise speed, or the current hover / plane speed */
if (_vstatus.vehicle_type == vehicle_status_s::VEHICLE_TYPE_ROTARY_WING) {
if (is_planned_mission() && _mission_cruising_speed_mc > 0.0f) {
return _mission_cruising_speed_mc;
} else {
return -1.0f;
}
} else {
if (is_planned_mission() && _mission_cruising_speed_fw > 0.0f) {
return _mission_cruising_speed_fw;
} else {
return -1.0f;
}
}
}
void
Navigator::set_cruising_speed(float speed)
{
if (_vstatus.vehicle_type == vehicle_status_s::VEHICLE_TYPE_ROTARY_WING) {
_mission_cruising_speed_mc = speed;
} else {
_mission_cruising_speed_fw = speed;
}
}
void
Navigator::reset_cruising_speed()
{
_mission_cruising_speed_mc = -1.0f;
_mission_cruising_speed_fw = -1.0f;
}
void
Navigator::reset_triplets()
{
_pos_sp_triplet.current.valid = false;
_pos_sp_triplet.previous.valid = false;
_pos_sp_triplet.next.valid = false;
_pos_sp_triplet_updated = true;
}
float
Navigator::get_cruising_throttle()
{
/* Return the mission-requested cruise speed, or default FW_THR_CRUISE value */
if (_mission_throttle > FLT_EPSILON) {
return _mission_throttle;
} else {
return -1.0f;
}
}
float
Navigator::get_acceptance_radius(float mission_item_radius)
{
float radius = mission_item_radius;
// XXX only use navigation capabilities for now
// when in fixed wing mode
// this might need locking against a commanded transition
// so that a stale _vstatus doesn't trigger an accepted mission item.
const position_controller_status_s &pos_ctrl_status = _position_controller_status_sub.get();
if ((pos_ctrl_status.timestamp > _pos_sp_triplet.timestamp) && pos_ctrl_status.acceptance_radius > radius) {
radius = pos_ctrl_status.acceptance_radius;
}
return radius;
}
float
Navigator::get_yaw_acceptance(float mission_item_yaw)
{
float yaw = mission_item_yaw;
const position_controller_status_s &pos_ctrl_status = _position_controller_status_sub.get();
// if yaw_acceptance from position controller is NaN overwrite the mission item yaw such that
// the waypoint can be reached from any direction
if ((pos_ctrl_status.timestamp > _pos_sp_triplet.timestamp) && !PX4_ISFINITE(pos_ctrl_status.yaw_acceptance)) {
yaw = pos_ctrl_status.yaw_acceptance;
}
return yaw;
}
void
Navigator::load_fence_from_file(const char *filename)
{
_geofence.loadFromFile(filename);
}
/**
* Creates a fake traffic measurement with supplied parameters.
*
*/
void Navigator::fake_traffic(const char *callsign, float distance, float direction, float traffic_heading,
float altitude_diff, float hor_velocity, float ver_velocity)
{
double lat, lon;
waypoint_from_heading_and_distance(get_global_position()->lat, get_global_position()->lon, direction, distance, &lat,
&lon);
float alt = get_global_position()->alt + altitude_diff;
// float vel_n = get_global_position()->vel_n;
// float vel_e = get_global_position()->vel_e;
// float vel_d = get_global_position()->vel_d;
transponder_report_s tr{};
tr.timestamp = hrt_absolute_time();
tr.icao_address = 1234;
tr.lat = lat; // Latitude, expressed as degrees
tr.lon = lon; // Longitude, expressed as degrees
tr.altitude_type = 0;
tr.altitude = alt;
tr.heading = traffic_heading; //-atan2(vel_e, vel_n); // Course over ground in radians
tr.hor_velocity = hor_velocity; //sqrtf(vel_e * vel_e + vel_n * vel_n); // The horizontal velocity in m/s
tr.ver_velocity = ver_velocity; //-vel_d; // The vertical velocity in m/s, positive is up
strncpy(&tr.callsign[0], callsign, sizeof(tr.callsign) - 1);
tr.callsign[sizeof(tr.callsign) - 1] = 0;
tr.emitter_type = 0; // Type from ADSB_EMITTER_TYPE enum
tr.tslc = 2; // Time since last communication in seconds
tr.flags = transponder_report_s::PX4_ADSB_FLAGS_VALID_COORDS | transponder_report_s::PX4_ADSB_FLAGS_VALID_HEADING |
transponder_report_s::PX4_ADSB_FLAGS_VALID_VELOCITY |
transponder_report_s::PX4_ADSB_FLAGS_VALID_ALTITUDE |
transponder_report_s::PX4_ADSB_FLAGS_VALID_CALLSIGN; // Flags to indicate various statuses including valid data fields
tr.squawk = 6667;
uORB::PublicationQueued<transponder_report_s> tr_pub{ORB_ID(transponder_report)};
tr_pub.publish(tr);
}
void Navigator::check_traffic()
{
double lat = get_global_position()->lat;
double lon = get_global_position()->lon;
float alt = get_global_position()->alt;
// TODO for non-multirotors predicting the future
// position as accurately as possible will become relevant
// float vel_n = get_global_position()->vel_n;
// float vel_e = get_global_position()->vel_e;
// float vel_d = get_global_position()->vel_d;
bool changed = _traffic_sub.updated();
float horizontal_separation = 500;
float vertical_separation = 500;
while (changed) {
transponder_report_s tr{};
_traffic_sub.copy(&tr);
uint16_t required_flags = transponder_report_s::PX4_ADSB_FLAGS_VALID_COORDS |
transponder_report_s::PX4_ADSB_FLAGS_VALID_HEADING |
transponder_report_s::PX4_ADSB_FLAGS_VALID_VELOCITY | transponder_report_s::PX4_ADSB_FLAGS_VALID_ALTITUDE;
if ((tr.flags & required_flags) != required_flags) {
changed = _traffic_sub.updated();
continue;
}
float d_hor, d_vert;
get_distance_to_point_global_wgs84(lat, lon, alt,
tr.lat, tr.lon, tr.altitude, &d_hor, &d_vert);
// predict final altitude (positive is up) in prediction time frame
float end_alt = tr.altitude + (d_vert / tr.hor_velocity) * tr.ver_velocity;
// Predict until the vehicle would have passed this system at its current speed
float prediction_distance = d_hor + 1000.0f;
// If the altitude is not getting close to us, do not calculate
// the horizontal separation.
// Since commercial flights do most of the time keep flight levels
// check for the current and for the predicted flight level.
// we also make the implicit assumption that this system is on the lowest
// flight level close to ground in the
// (end_alt - horizontal_separation < alt) condition. If this system should
// ever be used in normal airspace this implementation would anyway be
// inappropriate as it should be replaced with a TCAS compliant solution.
if ((fabsf(alt - tr.altitude) < vertical_separation) || ((end_alt - horizontal_separation) < alt)) {
double end_lat, end_lon;
waypoint_from_heading_and_distance(tr.lat, tr.lon, tr.heading, prediction_distance, &end_lat, &end_lon);
struct crosstrack_error_s cr;
if (!get_distance_to_line(&cr, lat, lon, tr.lat, tr.lon, end_lat, end_lon)) {
if (!cr.past_end && (fabsf(cr.distance) < horizontal_separation)) {
// direction of traffic in human-readable 0..360 degree in earth frame
int traffic_direction = math::degrees(tr.heading) + 180;