SysFSGPIOPin.hpp

Go to the documentation of this file.

/*
    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_;
};
}
}
}