mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-20 09:28:24 +02:00
6ba4aff064
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10603 3c298f89-4303-0410-b956-a3cf2f4a3e73
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
|
|
*
|
|
* Feedback, Bugs... blogic@openwrt.org
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <linux/gpio_dev.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
void
|
|
print_usage()
|
|
{
|
|
printf("gpioctl dirin|dirout|get|set|clear gpio\n");
|
|
exit(0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int gpio_pin;
|
|
int fd;
|
|
int result = 0;
|
|
|
|
if (argc != 3)
|
|
{
|
|
print_usage();
|
|
}
|
|
|
|
if ((fd = open("/dev/gpio", O_RDWR)) < 0)
|
|
{
|
|
printf("Error whilst opening /dev/gpio\n");
|
|
return -1;
|
|
}
|
|
|
|
gpio_pin = atoi(argv[2]);
|
|
|
|
printf("using gpio pin %d\n", gpio_pin);
|
|
|
|
if (!strcmp(argv[1], "dirin"))
|
|
{
|
|
ioctl(fd, GPIO_DIR_IN, gpio_pin);
|
|
} else if (!strcmp(argv[1], "dirout"))
|
|
{
|
|
ioctl(fd, GPIO_DIR_OUT, gpio_pin);
|
|
} else if (!strcmp(argv[1], "get"))
|
|
{
|
|
result = ioctl(fd, GPIO_GET, gpio_pin);
|
|
printf("Pin %d is %s\n", gpio_pin, (result ? "HIGH" : "LOW"));
|
|
} else if (!strcmp(argv[1], "set"))
|
|
{
|
|
ioctl(fd, GPIO_SET, gpio_pin);
|
|
} else if (!strcmp(argv[1], "clear"))
|
|
{
|
|
ioctl(fd, GPIO_CLEAR, gpio_pin);
|
|
} else print_usage();
|
|
|
|
return result;
|
|
}
|