LibgpiodPin.hpp

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/*
    Copyright (C) 2014-2022 Leosac
 
    This file is part of Leosac.
 
    Leosac is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    Leosac 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 Affero General Public License for more details.
 
    You should have received a copy of the GNU Affero General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
 
#pragma once
 
#include "LibgpiodModule.hpp"
#include "hardware/GPIO.hpp"
#include <zmqpp/zmqpp.hpp>
#include <gpiod.h>
 
namespace Leosac
{
namespace Module
{
namespace Libgpiod
{
class LibgpiodModule;
class LibgpiodConfig;
 
class LibgpiodPin
{
  public:
    using Direction = Hardware::GPIO::Direction;
 
    enum class InterruptMode
    {
        None,
        Rising,
        Falling,
        Both,
    };
 
    LibgpiodPin(zmqpp::context &ctx, const std::string &name, const std::string &gpio_device,
                 int gpio_offset, Direction direction, InterruptMode interrupt_mode,
                 bool initial_value, LibgpiodModule &module);
 
    ~LibgpiodPin();
 
    LibgpiodPin(const LibgpiodPin &) = delete;
 
    LibgpiodPin &operator=(const LibgpiodPin &) = delete;
 
    LibgpiodPin &operator=(LibgpiodPin &&) = delete;
 
    LibgpiodPin(LibgpiodPin &&o) = delete;
 
    void release();
 
    void register_sockets(zmqpp::reactor *reactor);
 
    std::chrono::system_clock::time_point next_update() const;
 
    void update();
 
  private:
    void handle_interrupt();
 
    bool read_value();
 
    bool turn_on(zmqpp::message *msg = nullptr);
 
    bool turn_off();
 
    bool toggle();
 
    void handle_message();
 
    void set_direction(Direction dir);
 
    void set_interrupt(InterruptMode mode);
 
    zmqpp::socket sock_;
 
    std::string name_;
 
    std::string gpio_device_;
 
    int gpio_offset_;
 
    const Direction direction_;
 
    const bool initial_value_;
 
    LibgpiodModule &module_;
 
    std::chrono::system_clock::time_point next_update_time_;
 
    gpiod_chip *gpiod_chip_;
 
    gpiod_line *gpiod_line_;
 
    int gpiod_fd_;
};
}
}
}