ardupilot/libraries/AP_Mount/AP_Mount_Backend.h

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/*
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/>.
*/
/*
Mount driver backend class. Each supported mount type
needs to have an object derived from this class.
*/
#pragma once
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#include "AP_Mount.h"
#if HAL_MOUNT_ENABLED
#include <AP_Common/AP_Common.h>
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#include <RC_Channel/RC_Channel.h>
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class AP_Mount_Backend
{
public:
// Constructor
AP_Mount_Backend(AP_Mount &frontend, AP_Mount_Params &params, uint8_t instance) :
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_frontend(frontend),
_params(params),
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_instance(instance)
{}
// init - performs any required initialisation for this instance
virtual void init();
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// update mount position - should be called periodically
virtual void update() = 0;
// used for gimbals that need to read INS data at full rate
virtual void update_fast() {}
// return true if healthy
virtual bool healthy() const { return true; }
// return true if this mount accepts roll or pitch targets
virtual bool has_roll_control() const;
virtual bool has_pitch_control() const;
// returns true if this mount can control its pan (required for multicopters)
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virtual bool has_pan_control() const = 0;
// get attitude as a quaternion. returns true on success.
// att_quat will be an earth-frame quaternion rotated such that
// yaw is in body-frame.
virtual bool get_attitude_quaternion(Quaternion& att_quat) = 0;
// get mount's mode
enum MAV_MOUNT_MODE get_mode() const { return _mode; }
// set mount's mode
void set_mode(enum MAV_MOUNT_MODE mode) { _mode = mode; }
// set yaw_lock. If true, the gimbal's yaw target is maintained in earth-frame meaning it will lock onto an earth-frame heading (e.g. North)
// If false (aka "follow") the gimbal's yaw is maintained in body-frame meaning it will rotate with the vehicle
void set_yaw_lock(bool yaw_lock) { _yaw_lock = yaw_lock; }
// set angle target in degrees
// yaw_is_earth_frame (aka yaw_lock) should be true if yaw angle is earth-frame, false if body-frame
void set_angle_target(float roll_deg, float pitch_deg, float yaw_deg, bool yaw_is_earth_frame);
// sets rate target in deg/s
// yaw_lock should be true if the yaw rate is earth-frame, false if body-frame (e.g. rotates with body of vehicle)
void set_rate_target(float roll_degs, float pitch_degs, float yaw_degs, bool yaw_is_earth_frame);
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// set_roi_target - sets target location that mount should attempt to point towards
void set_roi_target(const Location &target_loc);
// clear_roi_target - clears target location that mount should attempt to point towards
void clear_roi_target();
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// set_sys_target - sets system that mount should attempt to point towards
void set_target_sysid(uint8_t sysid);
// handle do_mount_control command. Returns MAV_RESULT_ACCEPTED on success
MAV_RESULT handle_command_do_mount_control(const mavlink_command_long_t &packet);
// handle do_gimbal_manager_configure. Returns MAV_RESULT_ACCEPTED on success
// requires original message in order to extract caller's sysid and compid
MAV_RESULT handle_command_do_gimbal_manager_configure(const mavlink_command_long_t &packet, const mavlink_message_t &msg);
// process MOUNT_CONFIGURE messages received from GCS. deprecated.
void handle_mount_configure(const mavlink_mount_configure_t &msg);
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// process MOUNT_CONTROL messages received from GCS. deprecated.
void handle_mount_control(const mavlink_mount_control_t &packet);
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// send a GIMBAL_DEVICE_ATTITUDE_STATUS message to GCS
void send_gimbal_device_attitude_status(mavlink_channel_t chan);
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// return gimbal capabilities sent to GCS in the GIMBAL_MANAGER_INFORMATION
virtual uint32_t get_gimbal_manager_capability_flags() const;
// send a GIMBAL_MANAGER_INFORMATION message to GCS
void send_gimbal_manager_information(mavlink_channel_t chan);
// send a GIMBAL_MANAGER_STATUS message to GCS
void send_gimbal_manager_status(mavlink_channel_t chan);
// handle a GIMBAL_REPORT message
virtual void handle_gimbal_report(mavlink_channel_t chan, const mavlink_message_t &msg) {}
// handle a PARAM_VALUE message
virtual void handle_param_value(const mavlink_message_t &msg) {}
// handle a GLOBAL_POSITION_INT message
bool handle_global_position_int(uint8_t msg_sysid, const mavlink_global_position_int_t &packet);
// handle GIMBAL_DEVICE_INFORMATION message
virtual void handle_gimbal_device_information(const mavlink_message_t &msg) {}
// handle GIMBAL_DEVICE_ATTITUDE_STATUS message
virtual void handle_gimbal_device_attitude_status(const mavlink_message_t &msg) {}
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// accessors for scripting backends
virtual bool get_rate_target(float& roll_degs, float& pitch_degs, float& yaw_degs, bool& yaw_is_earth_frame) { return false; }
virtual bool get_angle_target(float& roll_deg, float& pitch_deg, float& yaw_deg, bool& yaw_is_earth_frame) { return false; }
virtual bool get_location_target(Location &target_loc) { return false; }
virtual void set_attitude_euler(float roll_deg, float pitch_deg, float yaw_bf_deg) {};
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//
// camera controls for gimbals that include a camera
//
// take a picture. returns true on success
virtual bool take_picture() { return false; }
// start or stop video recording. returns true on success
// set start_recording = true to start record, false to stop recording
virtual bool record_video(bool start_recording) { return false; }
// set zoom specified as a rate or percentage
virtual bool set_zoom(ZoomType zoom_type, float zoom_value) { return false; }
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// set focus specified as rate, percentage or auto
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// focus in = -1, focus hold = 0, focus out = 1
virtual bool set_focus(FocusType focus_type, float focus_value) { return false; }
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protected:
enum class MountTargetType {
ANGLE,
RATE,
};
// structure for a single angle or rate target
struct MountTarget {
float roll;
float pitch;
float yaw;
bool yaw_is_ef;
};
// returns true if user has configured a valid yaw angle range
// allows user to disable yaw even on 3-axis gimbal
bool yaw_range_valid() const { return (_params.yaw_angle_min < _params.yaw_angle_max); }
// returns true if mavlink heartbeat should be suppressed for this gimbal (only used by Solo gimbal)
virtual bool suppress_heartbeat() const { return false; }
// get pilot input (in the range -1 to +1) received through RC
void get_rc_input(float& roll_in, float& pitch_in, float& yaw_in) const;
// get rate targets (in rad/s) from pilot RC
// returns true on success (RC is providing rate targets), false on failure (RC is providing angle targets)
bool get_rc_rate_target(MountTarget& rate_rads) const WARN_IF_UNUSED;
// get angle targets (in radians) from pilot RC
// returns true on success (RC is providing angle targets), false on failure (RC is providing rate targets)
bool get_rc_angle_target(MountTarget& angle_rad) const WARN_IF_UNUSED;
// get angle targets (in radians) to a Location
// returns true on success, false on failure
bool get_angle_target_to_location(const Location &loc, MountTarget& angle_rad) const WARN_IF_UNUSED;
// get angle targets (in radians) to ROI location
// returns true on success, false on failure
bool get_angle_target_to_roi(MountTarget& angle_rad) const WARN_IF_UNUSED;
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// get angle targets (in radians) to home location
// returns true on success, false on failure
bool get_angle_target_to_home(MountTarget& angle_rad) const WARN_IF_UNUSED;
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// get angle targets (in radians) to a vehicle with sysid of _target_sysid
// returns true on success, false on failure
bool get_angle_target_to_sysid(MountTarget& angle_rad) const WARN_IF_UNUSED;
// return body-frame yaw angle from a mount target
float get_bf_yaw_angle(const MountTarget& angle_rad) const;
// return earth-frame yaw angle from a mount target
float get_ef_yaw_angle(const MountTarget& angle_rad) const;
// update angle targets using a given rate target
// the resulting angle_rad yaw frame will match the rate_rad yaw frame
// assumes a 50hz update rate
void update_angle_target_from_rate(const MountTarget& rate_rad, MountTarget& angle_rad) const;
// helper function to provide GIMBAL_DEVICE_FLAGS for use in GIMBAL_DEVICE_ATTITUDE_STATUS message
uint16_t get_gimbal_device_flags() const;
// sent warning to GCS
void send_warning_to_GCS(const char* warning_str);
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AP_Mount &_frontend; // reference to the front end which holds parameters
AP_Mount_Params &_params; // parameters for this backend
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uint8_t _instance; // this instance's number
MAV_MOUNT_MODE _mode; // current mode (see MAV_MOUNT_MODE enum)
bool _yaw_lock; // True if the gimbal's yaw target is maintained in earth-frame, if false (aka "follow") it is maintained in body-frame
// structure for MAVLink Targeting angle and rate targets
struct {
MountTargetType target_type;// MAVLink targeting mode's current target type (e.g. angle or rate)
MountTarget angle_rad; // angle target in radians
MountTarget rate_rads; // rate target in rad/s
} mavt_target;
Location _roi_target; // roi target location
bool _roi_target_set; // true if the roi target has been set
uint8_t _target_sysid; // sysid to track
Location _target_sysid_location;// sysid target location
bool _target_sysid_location_set;// true if _target_sysid has been set
uint32_t _last_warning_ms; // system time of last warning sent to GCS
// structure holding mavlink sysid and compid of controller of this gimbal
// see MAV_CMD_DO_GIMBAL_MANAGER_CONFIGURE and GIMBAL_MANAGER_STATUS
struct {
uint8_t sysid;
uint8_t compid;
} mavlink_control_id;
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};
#endif // HAL_MOUNT_ENABLED