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76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2017 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file linux_gpio.h
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*
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* Linux sysfs GPIO Interface
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*
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* This interface allows manipulation of sysfs GPIOs on Linux
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*
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* @author Nicolae Rosia <nicolae.rosia@gmail.com>
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*/
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class LinuxGPIO
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{
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public:
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LinuxGPIO(unsigned int pin);
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~LinuxGPIO() = default;
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enum class Direction {
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IN = 0,
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OUT = 1,
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};
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enum class Value {
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LOW = 0,
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HIGH = 1,
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};
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int exportPin();
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int unexportPin();
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int setDirection(LinuxGPIO::Direction dir);
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int readValue();
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int writeValue(LinuxGPIO::Value value);
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private:
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static int _exportPin(unsigned int pin);
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static int _unexportPin(unsigned int pin);
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static int _setDirection(unsigned int pin, int dir);
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static int _readValue(unsigned int pin);
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static int _writeValue(unsigned int pin, unsigned int value);
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int _pin;
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};
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