63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
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//
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// BSD 3-Clause License
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//
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// Hardware Abstraction Layer (HAL) targeted to Raspberry Pi and
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// Dragino LoRa/GPS HAT
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//
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// Copyright (c) 2017, Wolfgang Klenk
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// 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 are met:
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//
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// * Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef GPIO_H
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#define GPIO_H
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//
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// Implement some functionalities that WiringPi does not provide.
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//
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// Enables us to use OS call "poll" to _blocking_ check if there
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// was a transition on of several input pins.
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//
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static char *GPIO_DIRECTION_IN = "in";
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static char *GPIO_DIRECTION_OUT = "out";
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static char *GPIO_DIRECTION_OUT_HIGH = "high";
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static char *GPIO_DIRECTION_OUT_LOW = "low";
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static void* GPIO_EDGE_NONE = "none";
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static void* GPIO_EDGE_RISING = "rising";
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static void* GPIO_EDGE_FALLING = "falling";
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static void* GPIO_EDGE_BOTH = "both";
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void gpioExportPin(int pin);
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void gpioUnexportPin(int pin);
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void gpioSetPinDirection(int pin, const char *direction);
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void gpioSetPinEdge(int pin, void* edge);
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int gpioWaitForInterrupt(const int *pins, size_t npins, int timeout_ms);
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#endif
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