add userspace tool for gpio_dev
authorJohn Crispin <john@openwrt.org>
Sat, 26 Jan 2008 04:24:05 +0000 (04:24 +0000)
committerJohn Crispin <john@openwrt.org>
Sat, 26 Jan 2008 04:24:05 +0000 (04:24 +0000)
SVN-Revision: 10267

package/gpioctl/Makefile [new file with mode: 0644]
package/gpioctl/src/Makefile [new file with mode: 0644]
package/gpioctl/src/main.c [new file with mode: 0644]
target/linux/generic-2.6/files/drivers/gpio/gpio_dev.c

diff --git a/package/gpioctl/Makefile b/package/gpioctl/Makefile
new file mode 100644 (file)
index 0000000..f288ec9
--- /dev/null
@@ -0,0 +1,43 @@
+#
+# Copyright (C) 2008 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+# $Id$
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=gpioctl
+PKG_RELEASE:=1
+PKG_VERSION:=1.0
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/gpioctl
+  SECTION:=utils
+  CATEGORY:=Utilities
+  TITLE:=Tool for controlling gpio pins
+endef
+
+define Package/gpioctl/description
+       Tool for controlling gpio pins
+endef
+
+define Build/Prepare
+       mkdir -p $(PKG_BUILD_DIR)
+       $(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Compile
+       $(MAKE) -C $(PKG_BUILD_DIR) \
+               $(TARGET_CONFIGURE_OPTS) CFLAGS="$(TARGET_CFLAGS) -I$(LINUX_DIR)/include" 
+endef
+
+define Package/gpioctl/install
+       $(INSTALL_DIR) $(1)/usr/bin
+       $(INSTALL_BIN) $(PKG_BUILD_DIR)/gpioctl $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,gpioctl))
diff --git a/package/gpioctl/src/Makefile b/package/gpioctl/src/Makefile
new file mode 100644 (file)
index 0000000..4676974
--- /dev/null
@@ -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 (file)
index 0000000..9aa3173
--- /dev/null
@@ -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;
+}
index 2adbb96..690a3fb 100644 (file)
@@ -44,7 +44,7 @@ gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned
 {
        int retval = 0;
 
-       if ((arg & gpio_access_mask) != arg)
+       if (((1 << arg) & gpio_access_mask) != (1 << arg))
        {
                retval = -EINVAL;
                goto out;
@@ -57,7 +57,7 @@ gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned
                break;
 
        case GPIO_SET:
-               gpio_set_value(arg, 0);
+               gpio_set_value(arg, 1);
                break;
 
        case GPIO_CLEAR: