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#
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# Copyright (C) 2008 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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# $Id$
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include $(TOPDIR)/rules.mk |
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include $(INCLUDE_DIR)/kernel.mk |
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PKG_NAME:=gpioctl
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PKG_RELEASE:=1
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PKG_VERSION:=1.0
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include $(INCLUDE_DIR)/package.mk |
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define Package/gpioctl |
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SECTION:=utils
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CATEGORY:=Utilities
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TITLE:=Tool for controlling gpio pins
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endef |
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define Package/gpioctl/description |
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Tool for controlling gpio pins
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endef |
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define Build/Prepare |
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mkdir -p $(PKG_BUILD_DIR)
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$(CP) ./src/* $(PKG_BUILD_DIR)/
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endef |
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define Build/Compile |
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$(MAKE) -C $(PKG_BUILD_DIR) \
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$(TARGET_CONFIGURE_OPTS) CFLAGS="$(TARGET_CFLAGS) -I$(LINUX_DIR)/include"
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endef |
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define Package/gpioctl/install |
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$(INSTALL_DIR) $(1)/usr/bin
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/gpioctl $(1)/usr/bin/
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endef |
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$(eval $(call BuildPackage,gpioctl)) |
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PROGS = gpioctl
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INSTDIR = $(prefix)/usr/bin
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INSTMODE = 0755
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INSTOWNER = root
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INSTGROUP = root
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OBJS = main.o
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all: $(PROGS) |
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$(PROGS): $(OBJS) |
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$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
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$(STRIP) $@
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%.o: %.c |
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$(CC) -c $(CFLAGS) $^ -o $@
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install: $(PROGS) |
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$(INSTALL) -d $(INSTDIR)
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$(INSTALL) -m $(INSTMODE) -o $(INSTOWNER) -g $(INSTGROUP) $(PROGS) $(INSTDIR)
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clean: |
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rm -f $(PROGS) *.o core
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/*
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA |
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* |
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* Feedback, Bugs... blogic@openwrt.org
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* |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <linux/gpio_dev.h> |
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#include <linux/ioctl.h> |
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void |
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print_usage() |
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{ |
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printf("gpioctl dirin|dirout|get|set|clear gpio\n"); |
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exit(0); |
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} |
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int |
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main(int argc, char **argv) |
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{ |
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int gpio_pin; |
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int fd; |
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int result = 0; |
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if (argc != 3) |
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{ |
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print_usage(); |
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} |
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if ((fd = open("/dev/gpio", O_RDWR)) < 0) |
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{ |
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printf("Error whilst opening /dev/gpio\n"); |
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return -1; |
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} |
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gpio_pin = atoi(argv[2]); |
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printf("using gpio pin %d\n", gpio_pin); |
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if (!strcmp(argv[1], "dirin")) |
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{ |
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ioctl(fd, GPIO_DIR_IN, gpio_pin); |
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} else if (!strcmp(argv[1], "dirout")) |
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{ |
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ioctl(fd, GPIO_DIR_OUT, gpio_pin); |
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} else if (!strcmp(argv[1], "get")) |
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{ |
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result = ioctl(fd, GPIO_GET, gpio_pin); |
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printf("Pin %d is %s\n", (result ? "HIGH" : "LOW")); |
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} else if (!strcmp(argv[1], "set")) |
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{ |
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ioctl(fd, GPIO_SET, gpio_pin); |
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} else if (!strcmp(argv[1], "clear")) |
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{ |
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ioctl(fd, GPIO_CLEAR, gpio_pin); |
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} else print_usage(); |
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return result; |
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} |
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