SysFSGPIOPin.hpp

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/*
    Copyright (C) 2014-2016 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 "SysFsGpioModule.hpp"
#include "hardware/GPIO.hpp"
#include <zmqpp/zmqpp.hpp>

namespace Leosac
{
namespace Module
{
namespace SysFsGpio
{
class SysFsGpioModule;
class SysFsGpioConfig;

class SysFsGpioPin
{
  public:
    using Direction = Hardware::GPIO::Direction;

    enum class InterruptMode
    {
        None,
        Rising,
        Falling,
        Both,
    };

    SysFsGpioPin(zmqpp::context &ctx, const std::string &name, int gpio_no,
                 Direction direction, InterruptMode interrupt_mode,
                 bool initial_value, SysFsGpioModule &module);

    ~SysFsGpioPin();

    SysFsGpioPin(const SysFsGpioPin &) = delete;

    SysFsGpioPin &operator=(const SysFsGpioPin &) = delete;

    SysFsGpioPin &operator=(SysFsGpioPin &&) = delete;

    SysFsGpioPin(SysFsGpioPin &&o) = delete;

    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);

    int file_fd_;

    int gpio_no_;

    zmqpp::socket sock_;

    std::string name_;

    const Direction direction_;

    const bool initial_value_;

    SysFsGpioModule &module_;

    const SysFsGpioConfig &path_cfg_;

    std::chrono::system_clock::time_point next_update_time_;
};
}
}
}