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author | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-10-05 10:12:53 +0000 |
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committer | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-10-05 10:12:53 +0000 |
commit | 5c105d9f3fd086aff195d3849dcf847d6b0bd927 (patch) | |
tree | 1229a11f725bfa58aa7c57a76898553bb5f6654a /package/gpioctl/src/main.c | |
download | openwrt-5c105d9f3fd086aff195d3849dcf847d6b0bd927.tar.gz openwrt-5c105d9f3fd086aff195d3849dcf847d6b0bd927.zip |
branch Attitude Adjustment
git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/gpioctl/src/main.c')
-rw-r--r-- | package/gpioctl/src/main.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/package/gpioctl/src/main.c b/package/gpioctl/src/main.c new file mode 100644 index 000000000..8ad27749b --- /dev/null +++ b/package/gpioctl/src/main.c @@ -0,0 +1,76 @@ +/* +* 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; +} |