ardupilot/libraries/AP_RangeFinder/AP_RangeFinder_analog.h

#pragma once

#include "RangeFinder.h"
#include "RangeFinder_Backend.h"

class AP_RangeFinder_analog : public AP_RangeFinder_Backend
{
public:
    // constructor
    AP_RangeFinder_analog(RangeFinder::RangeFinder_State &_state);

    // static detection function
    static bool detect(RangeFinder::RangeFinder_State &_state);

    // update state
    void update(void) override;

protected:

    MAV_DISTANCE_SENSOR _get_mav_distance_sensor_type() const override {
        return MAV_DISTANCE_SENSOR_UNKNOWN;
    }

private:
    // update raw voltage
    void update_voltage(void);

    AP_HAL::AnalogSource *source;
};