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authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-05 10:12:53 +0000
committerblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-05 10:12:53 +0000
commit5c105d9f3fd086aff195d3849dcf847d6b0bd927 (patch)
tree1229a11f725bfa58aa7c57a76898553bb5f6654a /package/gpioctl/src/main.c
downloadopenwrt-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.c76
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
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--- /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;
+}