ardupilot/libraries/AP_SpdHgtControl/AP_SpdHgtControl.h

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#pragma once
/// @file AP_SpdHgtControl.h
/// @brief generic speed & height controller interface
/*
This defines a generic interface for speed & height controllers. Each
specific controller should be a subclass of this generic
interface. All variables used by controllers should be in their
own class.
*/
#include <AP_Common/AP_Common.h>
#include <AP_Param/AP_Param.h>
#include <DataFlash/DataFlash.h>
#include <AP_Vehicle/AP_Vehicle.h>
class AP_SpdHgtControl {
public:
// Update the internal state of the height and height rate estimator
// Update of the inertial speed rate estimate internal state
// Should be called at 50Hz or faster
virtual void update_50hz(void) = 0;
// Update of the pitch and throttle demands
// Should be called at 10Hz or faster
virtual void update_pitch_throttle( int32_t hgt_dem_cm,
int32_t EAS_dem_cm,
enum AP_Vehicle::FixedWing::FlightStage flight_stage,
float distance_beyond_land_wp,
int32_t ptchMinCO_cd,
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int16_t throttle_nudge,
float hgt_afe,
float load_factor,
bool soaring_active) = 0;
// demanded throttle in percentage
// should return 0 to 100
virtual int32_t get_throttle_demand(void)=0;
// demanded pitch angle in centi-degrees
// should return -9000 to +9000
virtual int32_t get_pitch_demand(void)=0;
// Rate of change of velocity along X body axis in m/s^2
virtual float get_VXdot(void)=0;
// return current target airspeed
virtual float get_target_airspeed(void) const = 0;
// return maximum climb rate
virtual float get_max_climbrate(void) const = 0;
// added to let SoaringController reset pitch integrator to zero
virtual void reset_pitch_I(void) = 0;
// return landing sink rate
virtual float get_land_sinkrate(void) const = 0;
// return landing airspeed
virtual float get_land_airspeed(void) const = 0;
// set path_proportion accessor
virtual void set_path_proportion(float path_proportion) = 0;
// add new controllers to this enum. Users can then
// select which controller to use by setting the
// SPDHGT_CONTROLLER parameter
enum ControllerType {
CONTROLLER_TECS = 1
};
};