Pitot.h

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/* Copyright (c) 2022 Skyward Experimental Rocketry
 * Authors: Alberto Nidasio, Arturo Benedetti
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
 
#pragma once
 
#include <algorithms/ReferenceValues.h>
#include <drivers/timer/TimestampTimer.h>
#include <sensors/Sensor.h>
#include <utils/AeroUtils/AeroUtils.h>
 
#include <functional>
 
#include "PitotData.h"
 
namespace Boardcore
{
 
class Pitot : public Sensor<PitotData>
{
public:
    Pitot(std::function<float()> getTotalPressure,
          std::function<float()> getStaticPressure)
        : getTotalPressure(getTotalPressure),
          getStaticPressure(getStaticPressure)
    {
    }
 
    bool init() override { return true; }
 
    bool selfTest() override { return true; }
 
    void setReferenceValues(const ReferenceValues reference)
    {
        this->reference = reference;
    }
 
    ReferenceValues getReferenceValues() { return reference; }
 
protected:
    PitotData sampleImpl() override
    {
        float totalPressure  = getTotalPressure();
        float staticPressure = getStaticPressure();
        PitotData pitotSpeed;
        if (totalPressure > 0 && staticPressure > 0 &&
            totalPressure > staticPressure)
        {
            // NOTE: Here we assume that we are always at refTemperature, so
            // calculations might be wrong at higher elevations!
            pitotSpeed.airspeed = Aeroutils::computePitotAirspeed(
                totalPressure, staticPressure, 0, reference.refTemperature);
            pitotSpeed.deltaP = totalPressure - staticPressure;
        }
        else
        {
            pitotSpeed.airspeed = 0;
            pitotSpeed.deltaP   = 0;
        }
        pitotSpeed.timestamp = TimestampTimer::getTimestamp();
 
        return pitotSpeed;
    }
 
private:
    std::function<float()> getTotalPressure;
    std::function<float()> getStaticPressure;
 
    ReferenceValues reference;
};
 
}  // namespace Boardcore