mirror of https://github.com/nymea/nymea-gpio
130 lines
3.0 KiB
C++
130 lines
3.0 KiB
C++
// SPDX-License-Identifier: LGPL-3.0-or-later
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* nymea-gpio
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* GPIO library for nymea
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*
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* Copyright (C) 2013 - 2024, nymea GmbH
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* Copyright (C) 2024 - 2025, chargebyte austria GmbH
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*
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* This file is part of nymea-gpio.
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*
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* nymea-gpio is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* nymea-gpio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with nymea-gpio. If not, see <https://www.gnu.org/licenses/>.
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#ifndef GPIO_H
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#define GPIO_H
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#include <QDebug>
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#include <QDir>
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#include <QLoggingCategory>
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#include <QObject>
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Q_DECLARE_LOGGING_CATEGORY(dcGpio)
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class GpioMonitor;
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struct gpiod_chip;
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#ifndef NYMEA_GPIO_USE_SYSFS
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#if defined(NYMEA_GPIO_LIBGPIOD_V2)
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struct gpiod_line_request;
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#else
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struct gpiod_line;
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#endif
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#endif
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class Gpio : public QObject
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{
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Q_OBJECT
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friend class GpioMonitor;
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public:
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enum Direction {
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DirectionInvalid,
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DirectionInput,
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DirectionOutput
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};
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Q_ENUM(Direction)
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enum Value {
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ValueInvalid = -1,
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ValueLow = 0,
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ValueHigh = 1
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};
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Q_ENUM(Value)
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enum Edge {
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EdgeFalling,
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EdgeRising,
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EdgeBoth,
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EdgeNone
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};
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Q_ENUM(Edge)
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explicit Gpio(int gpio, QObject *parent = nullptr);
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~Gpio();
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static bool isAvailable();
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QString gpioDirectory() const;
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int gpioNumber() const;
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bool exportGpio();
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bool unexportGpio();
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bool setDirection(Gpio::Direction direction);
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Gpio::Direction direction();
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bool setValue(Gpio::Value value);
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Gpio::Value value();
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bool setActiveLow(bool activeLow);
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bool activeLow();
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bool setEdgeInterrupt(Gpio::Edge edge);
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Gpio::Edge edgeInterrupt();
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private:
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#ifndef NYMEA_GPIO_USE_SYSFS
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bool resolveLine();
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bool requestLine(Gpio::Direction direction, Gpio::Edge edge, int outputValue);
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int logicalToPhysicalValue(Gpio::Value value) const;
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Gpio::Value physicalToLogicalValue(int value) const;
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int eventFd() const;
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QString m_chipName;
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unsigned int m_lineOffset = 0;
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gpiod_chip *m_chip = nullptr;
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#if defined(NYMEA_GPIO_LIBGPIOD_V2)
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gpiod_line_request *m_request = nullptr;
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#else
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gpiod_line *m_line = nullptr;
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#endif
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bool m_activeLow = false;
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Gpio::Edge m_edge = Gpio::EdgeNone;
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#endif
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int m_gpio = 0;
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Gpio::Direction m_direction = Gpio::DirectionOutput;
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#ifdef NYMEA_GPIO_USE_SYSFS
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QDir m_gpioDirectory;
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#endif
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};
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QDebug operator<<(QDebug debug, Gpio *gpio);
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#endif // GPIO_H
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