ardupilot/libraries/AP_Airspeed/AP_Airspeed_PX4.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/>.
*/
#pragma once
/*
backend driver for airspeed from PX4Firmware
*/
#include <AP_HAL/AP_HAL.h>
#include <AP_Param/AP_Param.h>
#include "AP_Airspeed_Backend.h"
class AP_Airspeed_PX4 : public AP_Airspeed_Backend {
public:
// constructor
AP_Airspeed_PX4(const AP_Float &psi_range) :
_psi_range(psi_range) {}
// probe and initialise the sensor
bool init(void);
// return the current differential_pressure in Pascal
bool get_differential_pressure(float &pressure);
// return the current temperature in degrees C, if available
bool get_temperature(float &temperature);
private:
int _fd = -1;
uint64_t _last_timestamp;
float _temperature;
const AP_Float &_psi_range;
};