ardupilot/Rover/mode_guided.cpp

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#include "Rover.h"
bool ModeGuided::_enter()
{
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// initialise submode to stop or loiter
if (rover.is_boat()) {
if (!start_loiter()) {
start_stop();
}
} else {
start_stop();
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}
// initialise waypoint navigation library
g2.wp_nav.init();
send_notification = false;
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return true;
}
void ModeGuided::update()
{
switch (_guided_mode) {
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case SubMode::WP:
{
// check if we've reached the destination
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if (!g2.wp_nav.reached_destination()) {
// update navigation controller
navigate_to_waypoint();
} else {
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// send notification
if (send_notification) {
send_notification = false;
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rover.gcs().send_mission_item_reached_message(0);
}
// we have reached the destination so stay here
if (rover.is_boat()) {
if (!start_loiter()) {
stop_vehicle();
}
} else {
stop_vehicle();
}
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// update distance to destination
_distance_to_destination = rover.current_loc.get_distance(g2.wp_nav.get_destination());
}
break;
}
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case SubMode::HeadingAndSpeed:
{
// stop vehicle if target not updated within 3 seconds
if (have_attitude_target && (millis() - _des_att_time_ms) > 3000) {
gcs().send_text(MAV_SEVERITY_WARNING, "target not received last 3secs, stopping");
have_attitude_target = false;
}
if (have_attitude_target) {
// run steering and throttle controllers
calc_steering_to_heading(_desired_yaw_cd);
calc_throttle(calc_speed_nudge(_desired_speed, is_negative(_desired_speed)), true);
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} else {
// we have reached the destination so stay here
if (rover.is_boat()) {
if (!start_loiter()) {
stop_vehicle();
}
} else {
stop_vehicle();
}
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}
break;
}
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case SubMode::TurnRateAndSpeed:
{
// stop vehicle if target not updated within 3 seconds
if (have_attitude_target && (millis() - _des_att_time_ms) > 3000) {
gcs().send_text(MAV_SEVERITY_WARNING, "target not received last 3secs, stopping");
have_attitude_target = false;
}
if (have_attitude_target) {
// run steering and throttle controllers
float steering_out = attitude_control.get_steering_out_rate(radians(_desired_yaw_rate_cds * 0.01f),
g2.motors.limit.steer_left,
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g2.motors.limit.steer_right,
rover.G_Dt);
set_steering(steering_out * 4500.0f);
calc_throttle(calc_speed_nudge(_desired_speed, is_negative(_desired_speed)), true);
} else {
// we have reached the destination so stay here
if (rover.is_boat()) {
if (!start_loiter()) {
stop_vehicle();
}
} else {
stop_vehicle();
}
}
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break;
}
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case SubMode::Loiter:
{
rover.mode_loiter.update();
break;
}
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case SubMode::SteeringAndThrottle:
{
// handle timeout
if (_have_strthr && (AP_HAL::millis() - _strthr_time_ms) > 3000) {
_have_strthr = false;
gcs().send_text(MAV_SEVERITY_WARNING, "target not received last 3secs, stopping");
}
if (_have_strthr) {
// pass latest steering and throttle directly to motors library
g2.motors.set_steering(_strthr_steering * 4500.0f, false);
g2.motors.set_throttle(_strthr_throttle * 100.0f);
} else {
// loiter or stop vehicle
if (rover.is_boat()) {
if (!start_loiter()) {
stop_vehicle();
}
} else {
stop_vehicle();
}
}
break;
}
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case SubMode::Stop:
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stop_vehicle();
break;
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default:
gcs().send_text(MAV_SEVERITY_WARNING, "Unknown GUIDED mode");
break;
}
}
// return heading (in degrees) and cross track error (in meters) for reporting to ground station (NAV_CONTROLLER_OUTPUT message)
float ModeGuided::wp_bearing() const
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.wp_bearing_cd() * 0.01f;
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
return 0.0f;
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case SubMode::Loiter:
return rover.mode_loiter.wp_bearing();
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return 0.0f;
}
// we should never reach here but just in case, return 0
return 0.0f;
}
float ModeGuided::nav_bearing() const
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.nav_bearing_cd() * 0.01f;
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
return 0.0f;
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case SubMode::Loiter:
return rover.mode_loiter.nav_bearing();
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return 0.0f;
}
// we should never reach here but just in case, return 0
return 0.0f;
}
float ModeGuided::crosstrack_error() const
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.crosstrack_error();
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
return 0.0f;
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case SubMode::Loiter:
return rover.mode_loiter.crosstrack_error();
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return 0.0f;
}
// we should never reach here but just in case, return 0
return 0.0f;
}
float ModeGuided::get_desired_lat_accel() const
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.get_lat_accel();
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
return 0.0f;
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case SubMode::Loiter:
return rover.mode_loiter.get_desired_lat_accel();
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return 0.0f;
}
// we should never reach here but just in case, return 0
return 0.0f;
}
// return distance (in meters) to destination
float ModeGuided::get_distance_to_destination() const
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{
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switch (_guided_mode) {
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case SubMode::WP:
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return _distance_to_destination;
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
return 0.0f;
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case SubMode::Loiter:
return rover.mode_loiter.get_distance_to_destination();
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return 0.0f;
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}
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// we should never reach here but just in case, return 0
return 0.0f;
}
// return true if vehicle has reached or even passed destination
bool ModeGuided::reached_destination() const
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.reached_destination();
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
case SubMode::Loiter:
case SubMode::SteeringAndThrottle:
case SubMode::Stop:
return true;
}
// we should never reach here but just in case, return true is the safer option
return true;
}
// set desired speed in m/s
bool ModeGuided::set_desired_speed(float speed)
{
switch (_guided_mode) {
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case SubMode::WP:
return g2.wp_nav.set_speed_max(speed);
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
// speed is set from mavlink message
return false;
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case SubMode::Loiter:
return rover.mode_loiter.set_desired_speed(speed);
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
// no speed control
return false;
}
return false;
}
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// get desired location
bool ModeGuided::get_desired_location(Location& destination) const
{
switch (_guided_mode) {
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case SubMode::WP:
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if (g2.wp_nav.is_destination_valid()) {
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destination = g2.wp_nav.get_oa_destination();
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return true;
}
return false;
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case SubMode::HeadingAndSpeed:
case SubMode::TurnRateAndSpeed:
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// not supported in these submodes
return false;
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case SubMode::Loiter:
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// get destination from loiter
return rover.mode_loiter.get_desired_location(destination);
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case SubMode::SteeringAndThrottle:
case SubMode::Stop:
// no desired location in this submode
break;
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}
// should never get here but just in case
return false;
}
// set desired location
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bool ModeGuided::set_desired_location(const Location &destination, Location next_destination)
{
if (use_scurves_for_navigation()) {
// use scurves for navigation
if (!g2.wp_nav.set_desired_location(destination, next_destination)) {
return false;
}
} else {
// use position controller input shaping for navigation
// this does not support object avoidance but does allow faster updates of the target
if (!g2.wp_nav.set_desired_location_expect_fast_update(destination)) {
return false;
}
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}
// handle guided specific initialisation and logging
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_guided_mode = SubMode::WP;
send_notification = true;
#if HAL_LOGGING_ENABLED
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rover.Log_Write_GuidedTarget((uint8_t)_guided_mode, Vector3f(destination.lat, destination.lng, 0), Vector3f(g2.wp_nav.get_speed_max(), 0.0f, 0.0f));
#endif
return true;
}
// set desired attitude
void ModeGuided::set_desired_heading_and_speed(float yaw_angle_cd, float target_speed)
{
// initialisation and logging
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_guided_mode = SubMode::HeadingAndSpeed;
_des_att_time_ms = AP_HAL::millis();
// record targets
_desired_yaw_cd = yaw_angle_cd;
_desired_speed = target_speed;
have_attitude_target = true;
#if HAL_LOGGING_ENABLED
// log new target
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rover.Log_Write_GuidedTarget((uint8_t)_guided_mode, Vector3f(_desired_yaw_cd, 0.0f, 0.0f), Vector3f(_desired_speed, 0.0f, 0.0f));
#endif
}
void ModeGuided::set_desired_heading_delta_and_speed(float yaw_delta_cd, float target_speed)
{
// handle initialisation
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if (_guided_mode != SubMode::HeadingAndSpeed) {
_guided_mode = SubMode::HeadingAndSpeed;
_desired_yaw_cd = ahrs.yaw_sensor;
}
set_desired_heading_and_speed(wrap_180_cd(_desired_yaw_cd + yaw_delta_cd), target_speed);
}
// set desired velocity
void ModeGuided::set_desired_turn_rate_and_speed(float turn_rate_cds, float target_speed)
{
// handle initialisation
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_guided_mode = SubMode::TurnRateAndSpeed;
_des_att_time_ms = AP_HAL::millis();
// record targets
_desired_yaw_rate_cds = turn_rate_cds;
_desired_speed = target_speed;
have_attitude_target = true;
#if HAL_LOGGING_ENABLED
// log new target
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rover.Log_Write_GuidedTarget((uint8_t)_guided_mode, Vector3f(_desired_yaw_rate_cds, 0.0f, 0.0f), Vector3f(_desired_speed, 0.0f, 0.0f));
#endif
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}
// set steering and throttle (both in the range -1 to +1)
void ModeGuided::set_steering_and_throttle(float steering, float throttle)
{
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_guided_mode = SubMode::SteeringAndThrottle;
_strthr_time_ms = AP_HAL::millis();
_strthr_steering = constrain_float(steering, -1.0f, 1.0f);
_strthr_throttle = constrain_float(throttle, -1.0f, 1.0f);
_have_strthr = true;
}
bool ModeGuided::start_loiter()
{
if (rover.mode_loiter.enter()) {
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_guided_mode = SubMode::Loiter;
return true;
}
return false;
}
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// start stopping vehicle as quickly as possible
void ModeGuided::start_stop()
{
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_guided_mode = SubMode::Stop;
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}
// set guided timeout and movement limits
void ModeGuided::limit_set(uint32_t timeout_ms, float horiz_max)
{
limit.timeout_ms = timeout_ms;
limit.horiz_max = horiz_max;
}
// clear/turn off guided limits
void ModeGuided::limit_clear()
{
limit.timeout_ms = 0;
limit.horiz_max = 0.0f;
}
// initialise guided start time and location as reference for limit checking
// only called from AUTO mode's start_guided method
void ModeGuided::limit_init_time_and_location()
{
limit.start_time_ms = AP_HAL::millis();
limit.start_loc = rover.current_loc;
}
// returns true if guided mode has breached a limit
bool ModeGuided::limit_breached() const
{
// check if we have passed the timeout
if ((limit.timeout_ms > 0) && (millis() - limit.start_time_ms >= limit.timeout_ms)) {
return true;
}
// check if we have gone beyond horizontal limit
if (is_positive(limit.horiz_max)) {
return (rover.current_loc.get_distance(limit.start_loc) > limit.horiz_max);
}
// if we got this far we must be within limits
return false;
}
// returns true if GUID_OPTIONS bit set to use scurve navigation instead of position controller input shaping
// scurves provide path planning and object avoidance but cannot handle fast updates to the destination (for fast updates use position controller input shaping)
bool ModeGuided::use_scurves_for_navigation() const
{
return ((rover.g2.guided_options.get() & uint32_t(Options::SCurvesUsedForNavigation)) != 0);
}