PX4-Autopilot/src/modules/manual_control/ManualControl.hpp

/****************************************************************************
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 *   Copyright (c) 2021 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
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#pragma once

#include <drivers/drv_hrt.h>
#include <lib/hysteresis/hysteresis.h>
#include <lib/perf/perf_counter.h>
#include <px4_platform_common/defines.h>
#include <px4_platform_common/module.h>
#include <px4_platform_common/module_params.h>
#include <px4_platform_common/posix.h>
#include <px4_platform_common/px4_work_queue/ScheduledWorkItem.hpp>
#include <uORB/topics/action_request.h>
#include <uORB/topics/landing_gear.h>
#include <uORB/topics/manual_control_input.h>
#include <uORB/topics/manual_control_switches.h>
#include <uORB/topics/manual_control_setpoint.h>
#include <uORB/topics/parameter_update.h>
#include <uORB/Publication.hpp>
#include <uORB/SubscriptionInterval.hpp>
#include <uORB/SubscriptionCallback.hpp>
#include "ManualControlSelector.hpp"

using namespace time_literals;

namespace manual_control
{

class MovingDiff
{
public:
	void update(float value, float dt_s)
	{
		if (!PX4_ISFINITE(value)) {
			// Ignore NAN
			return;
		}

		math::constrain(dt_s, 0.f, _time_period_s);

		// Leave _diff at 0.0f if we don't have a _last_value yet.
		if (PX4_ISFINITE(_last_value)) {
			const float new_diff = value - _last_value;
			_diff = new_diff * dt_s + _diff * (_time_period_s - dt_s);
		}

		_last_value = value;
	}

	float diff() const
	{
		return _diff;
	}

	void reset()
	{
		_diff = 0.0f;
		_last_value = NAN;
	}

private:
	static constexpr float _time_period_s{1.0f};

	float _diff{0.0f};
	float _last_value{NAN};
};


class ManualControl : public ModuleBase<ManualControl>, public ModuleParams, public px4::ScheduledWorkItem
{
public:
	ManualControl();
	~ManualControl() override;

	/** @see ModuleBase */
	static int task_spawn(int argc, char *argv[]);

	/** @see ModuleBase */
	static int custom_command(int argc, char *argv[]);

	/** @see ModuleBase */
	static int print_usage(const char *reason = nullptr);

	bool init();

	int print_status() override;

private:
	static constexpr int MAX_MANUAL_INPUT_COUNT = 3;

	void Run() override;
	void processStickArming(const manual_control_input_s &input);

	void evaluateModeSlot(uint8_t mode_slot);
	void sendActionRequest(int8_t action, int8_t source, int8_t mode = 0);
	void publishLandingGear(int8_t action);

	uORB::Publication<action_request_s> _action_request_pub{ORB_ID(action_request)};
	uORB::Publication<landing_gear_s> _landing_gear_pub{ORB_ID(landing_gear)};
	uORB::Publication<manual_control_setpoint_s> _manual_control_setpoint_pub{ORB_ID(manual_control_setpoint)};

	uORB::SubscriptionInterval _parameter_update_sub{ORB_ID(parameter_update), 1_s};
	int _previous_manual_control_input_instance{-1};
	uORB::SubscriptionCallbackWorkItem _manual_control_input_subs[MAX_MANUAL_INPUT_COUNT] {
		{this, ORB_ID(manual_control_input), 0},
		{this, ORB_ID(manual_control_input), 1},
		{this, ORB_ID(manual_control_input), 2},
	};
	uORB::SubscriptionCallbackWorkItem _manual_control_switches_sub{this, ORB_ID(manual_control_switches)};

	systemlib::Hysteresis _stick_arm_hysteresis{false};
	systemlib::Hysteresis _stick_disarm_hysteresis{false};
	systemlib::Hysteresis _button_hysteresis{false};

	ManualControlSelector _selector;
	bool _published_invalid_once{false};

	MovingDiff _x_diff{};
	MovingDiff _y_diff{};
	MovingDiff _z_diff{};
	MovingDiff _r_diff{};

	manual_control_switches_s _previous_switches{};
	bool _previous_switches_initialized{false};

	hrt_abstime _last_time{0};

	perf_counter_t	_loop_perf{perf_alloc(PC_ELAPSED, MODULE_NAME": cycle")};
	perf_counter_t	_loop_interval_perf{perf_alloc(PC_INTERVAL, MODULE_NAME": interval")};

	DEFINE_PARAMETERS(
		(ParamInt<px4::params::COM_RC_IN_MODE>) _param_com_rc_in_mode,
		(ParamFloat<px4::params::COM_RC_LOSS_T>) _param_com_rc_loss_t,
		(ParamFloat<px4::params::COM_RC_STICK_OV>) _param_com_rc_stick_ov,
		(ParamInt<px4::params::COM_RC_ARM_HYST>) _param_rc_arm_hyst,
		(ParamBool<px4::params::COM_ARM_SWISBTN>) _param_com_arm_swisbtn,
		(ParamInt<px4::params::COM_FLTMODE1>) _param_fltmode_1,
		(ParamInt<px4::params::COM_FLTMODE2>) _param_fltmode_2,
		(ParamInt<px4::params::COM_FLTMODE3>) _param_fltmode_3,
		(ParamInt<px4::params::COM_FLTMODE4>) _param_fltmode_4,
		(ParamInt<px4::params::COM_FLTMODE5>) _param_fltmode_5,
		(ParamInt<px4::params::COM_FLTMODE6>) _param_fltmode_6
	)
};
} // namespace manual_control