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gpio-sysfs.h
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gpio-sysfs.h
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#ifndef GPIOSYSFS
#define GPIOSYSFS
/* Copyright (c) 2011, RidgeRun
* Copyright (c) 2014, Bernd Porr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the RidgeRun.
* 4. Neither the name of the RidgeRun nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RIDGERUN ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL RIDGERUN BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
/****************************************************************
* Constants
****************************************************************/
#define SYSFS_GPIO_DIR "/sys/class/gpio"
#define MAX_BUF 256
/****************************************************************
* gpio_export
****************************************************************/
int gpio_export(unsigned int gpio);
/****************************************************************
* gpio_unexport
****************************************************************/
int gpio_unexport(unsigned int gpio);
/****************************************************************
* gpio_set_dir
****************************************************************/
int gpio_set_dir(unsigned int gpio, unsigned int out_flag);
/****************************************************************
* gpio_set_value
****************************************************************/
int gpio_set_value(unsigned int gpio, unsigned int value);
/****************************************************************
* gpio_get_value
****************************************************************/
int gpio_get_value(unsigned int gpio, unsigned int *value);
/****************************************************************
* gpio_set_edge
****************************************************************/
int gpio_set_edge(unsigned int gpio, const char *edge);
/****************************************************************
* gpio_fd_open
****************************************************************/
int gpio_fd_open(unsigned int gpio);
/****************************************************************
* gpio_fd_close
****************************************************************/
int gpio_fd_close(int fd);
/****************************************************************
* gpio_poll
****************************************************************/
int gpio_poll(int gpio_fd, int timeout);
#endif