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authorJohn Crispin <john@openwrt.org>2008-01-26 04:24:05 +0000
committerJohn Crispin <john@openwrt.org>2008-01-26 04:24:05 +0000
commit8f39c35159a208f1d36b9912c5d307c543203b2c (patch)
tree8dbcb9d395715c1aa5bef2a4c6b6d75defb43dbb /package/gpioctl/src
parentd7b86662f7fccf36e3091cdd5f7116d0a0a28279 (diff)
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add userspace tool for gpio_dev
SVN-Revision: 10267
Diffstat (limited to 'package/gpioctl/src')
-rw-r--r--package/gpioctl/src/Makefile24
-rw-r--r--package/gpioctl/src/main.c76
2 files changed, 100 insertions, 0 deletions
diff --git a/package/gpioctl/src/Makefile b/package/gpioctl/src/Makefile
new file mode 100644
index 0000000..4676974
--- /dev/null
+++ b/package/gpioctl/src/Makefile
@@ -0,0 +1,24 @@
+PROGS = gpioctl
+
+INSTDIR = $(prefix)/usr/bin
+INSTMODE = 0755
+INSTOWNER = root
+INSTGROUP = root
+
+OBJS = main.o
+
+all: $(PROGS)
+$(PROGS): $(OBJS)
+ $(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
+ $(STRIP) $@
+
+%.o: %.c
+ $(CC) -c $(CFLAGS) $^ -o $@
+
+install: $(PROGS)
+ $(INSTALL) -d $(INSTDIR)
+ $(INSTALL) -m $(INSTMODE) -o $(INSTOWNER) -g $(INSTGROUP) $(PROGS) $(INSTDIR)
+
+clean:
+ rm -f $(PROGS) *.o core
+
diff --git a/package/gpioctl/src/main.c b/package/gpioctl/src/main.c
new file mode 100644
index 0000000..9aa3173
--- /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", (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;
+}