44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* GPIO handler routines */
|
|
|
|
/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
|
|
* All Rights Reserved
|
|
*
|
|
* Author: Philipp Maier
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#define MAX_GPIOS 16
|
|
|
|
/* Struct holding the GPIO file descriptors and
|
|
meta information about the GPIO itsself */
|
|
struct gpio_descr {
|
|
unsigned int gpios[MAX_GPIOS];
|
|
unsigned int gpios_len;
|
|
FILE *fd_direction[MAX_GPIOS];
|
|
FILE *fd_value[MAX_GPIOS];
|
|
};
|
|
|
|
/* Open sysfs endpoints and initalize GPIOs */
|
|
struct gpio_descr *gpio_open(void *ctx, unsigned int *gpios,
|
|
unsigned int gpios_len);
|
|
|
|
/* Close sysfs endpoints and unintialize GPIOs */
|
|
void gpio_close(struct gpio_descr *gd);
|
|
|
|
/* Set GPIO pin status */
|
|
void gpio_set(struct gpio_descr *gd, unsigned int gpio, unsigned int state);
|