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https://github.com/ElvishArtisan/rivendell.git
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3b14fbfa10
* Added an 'RDMatrix::KernelGpio' element to the 'RDMatrix::Type enum. * Implemented a Kernel GPIO switcher driver in 'ripcd/kernelgpio.cpp' and 'ripcd/kernelgpio.h'.
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// rdkernelgpio.h
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//
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// Control Class for the Linux SysFS GPIO Interface
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//
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// (C) Copyright 2017 Fred Gleason <fredg@paravelsystems.com>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Library General Public License
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// version 2 as published by the Free Software Foundation.
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//
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// This program 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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#ifndef RDKERNELGPIO_H
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#define RDKERNELGPIO_H
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#include <stdio.h>
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#include <vector>
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#include <qobject.h>
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#include <qtimer.h>
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//
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// See https://www.kernel.org/doc/Documentation/gpio/sysfs.txt
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// for an explanation of this interface.
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//
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#define KERNELGPIO_SYS_FILE QString("/sys/class/gpio")
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#define KERNELGPIO_POLL_INTERVAL 20
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class RDKernelGpio : public QObject
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{
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Q_OBJECT;
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public:
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enum Direction {In=0,Out=1};
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enum Edge {None=0,Rising=1,Falling=2,Both=3};
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RDKernelGpio(QObject *parent=0);
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~RDKernelGpio();
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bool addGpio(int gpio);
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bool removeGpio(int gpio);
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Direction direction(int gpio, bool *ok=NULL) const;
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bool setDirection(int gpio,Direction dir) const;
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bool activeLow(int gpio, bool *ok=NULL) const;
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bool setActiveLow(int gpio,bool state) const;
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bool value(int gpio,bool *ok=NULL) const;
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public slots:
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bool setValue(int gpio,bool state) const;
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private slots:
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void pollData();
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signals:
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void valueChanged(int gpio,bool state);
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private:
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FILE *OpenNode(const QString &name,const char *mode,int gpio=-1) const;
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std::vector<int> gpio_gpios;
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std::vector<bool> gpio_states;
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QTimer *gpio_poll_timer;
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};
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#endif // RDKERNELGPIO_H
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