/*
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 .
*/
#pragma once
/*
backend driver class for airspeed
*/
#include
#include
#include "AP_Airspeed.h"
class AP_Airspeed_Backend {
public:
AP_Airspeed_Backend(AP_Airspeed &frontend);
virtual ~AP_Airspeed_Backend();
// probe and initialise the sensor
virtual bool init(void) = 0;
// return the current differential_pressure in Pascal
virtual bool get_differential_pressure(float &pressure) = 0;
// return the current temperature in degrees C, if available
virtual bool get_temperature(float &temperature) = 0;
protected:
int8_t get_pin(void) const;
float get_psi_range(void) const;
uint8_t get_bus(void) const;
AP_Airspeed::pitot_tube_order get_tube_order(void) const {
return AP_Airspeed::pitot_tube_order(frontend._tube_order.get());
}
// semaphore for access to shared frontend data
AP_HAL::Semaphore *sem;
float get_airspeed_ratio(void) const {
return frontend.get_airspeed_ratio();
}
// some sensors allow zero offsets while healthy
void set_allow_zero_offset(void) {
frontend._allow_zero_offset = true;
}
// set to no zero cal, which makes sense for some sensors
void set_skip_cal(void) {
frontend._skip_cal.set(1);
}
// set zero offset
void set_offset(float ofs) {
frontend._offset.set(ofs);
}
private:
AP_Airspeed &frontend;
};