andrewm@0: /*
andrewm@0:  * SimpleGPIO.h
andrewm@0:  *
andrewm@0:  * Copyright Derek Molloy, School of Electronic Engineering, Dublin City University
andrewm@0:  * www.derekmolloy.ie
andrewm@0:  *
andrewm@0:  * Based on Software by RidgeRun
andrewm@0:  * Copyright (c) 2011, RidgeRun
andrewm@0:  * All rights reserved.
andrewm@0:  *
andrewm@0:  * Redistribution and use in source and binary forms, with or without
andrewm@0:  * modification, are permitted provided that the following conditions are met:
andrewm@0:  * 1. Redistributions of source code must retain the above copyright
andrewm@0:  *    notice, this list of conditions and the following disclaimer.
andrewm@0:  * 2. Redistributions in binary form must reproduce the above copyright
andrewm@0:  *    notice, this list of conditions and the following disclaimer in the
andrewm@0:  *    documentation and/or other materials provided with the distribution.
andrewm@0:  * 3. All advertising materials mentioning features or use of this software
andrewm@0:  *    must display the following acknowledgement:
andrewm@0:  *    This product includes software developed by the RidgeRun.
andrewm@0:  * 4. Neither the name of the RidgeRun nor the
andrewm@0:  *    names of its contributors may be used to endorse or promote products
andrewm@0:  *    derived from this software without specific prior written permission.
andrewm@0:  *
andrewm@0:  * THIS SOFTWARE IS PROVIDED BY RIDGERUN ''AS IS'' AND ANY
andrewm@0:  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
andrewm@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
andrewm@0:  * DISCLAIMED. IN NO EVENT SHALL RIDGERUN BE LIABLE FOR ANY
andrewm@0:  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
andrewm@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
andrewm@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
andrewm@0:  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
andrewm@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
andrewm@0:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
andrewm@0:  */
andrewm@0: 
andrewm@0: #ifndef SIMPLEGPIO_H_
andrewm@0: #define SIMPLEGPIO_H_
andrewm@0: 
andrewm@0:  /****************************************************************
andrewm@0:  * Constants
andrewm@0:  ****************************************************************/
andrewm@0: 
andrewm@0: #define SYSFS_GPIO_DIR "/sys/class/gpio"
andrewm@0: #define SYSFS_LED_DIR  "/sys/class/leds"
andrewm@0: #define POLL_TIMEOUT (3 * 1000) /* 3 seconds */
andrewm@0: #define MAX_BUF 128
andrewm@0: 
andrewm@0: enum PIN_DIRECTION{
andrewm@0: 	INPUT_PIN=0,
andrewm@0: 	OUTPUT_PIN=1
andrewm@0: };
andrewm@0: 
andrewm@0: enum PIN_VALUE{
andrewm@0: 	LOW=0,
andrewm@0: 	HIGH=1
andrewm@0: };
andrewm@0: 
andrewm@0: /****************************************************************
andrewm@0:  * gpio_functions
andrewm@0:  ****************************************************************/
andrewm@0: int gpio_setup(unsigned int gpio, int out_flag);
andrewm@0: int gpio_export(unsigned int gpio);
andrewm@0: int gpio_unexport(unsigned int gpio);
andrewm@0: int gpio_set_dir(unsigned int gpio, int out_flag);
andrewm@0: int gpio_set_value(unsigned int gpio, int value);
andrewm@0: int gpio_get_value(unsigned int gpio, unsigned int *value);
andrewm@0: int gpio_set_edge(unsigned int gpio, char *edge);
andrewm@0: int gpio_fd_open(unsigned int gpio, int writeFlag);
andrewm@0: int gpio_fd_close(int fd);
andrewm@0: int gpio_write(int fd, int value);
andrewm@0: int gpio_read(int fd, unsigned int *value);
andrewm@0: int gpio_dismiss(int fd, unsigned int gpio);
andrewm@0: 
andrewm@0: int led_set_trigger(unsigned int lednum, const char *trigger);
andrewm@0: 
andrewm@0: #endif /* SIMPLEGPIO_H_ */