Add dummy gpio.c implementation and final Makefile.

The whole lib should now build and install fine. It's not yet tested
on hardware, though.

include/libopenstm32.h

@@ -22,5 +22,6 @@
 #define LIBOPENSTM32_LIBOPENSTM32_H
 
 #include "libopenstm32/stdint.h"
+#include "libopenstm32/gpio.h"
 
 #endif

lib/Makefile

@@ -0,0 +1,38 @@
+##
+## This file is part of the libopenstm32 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+##
+
+# PREFIX	?= arm-none-eabi
+PREFIX		?= arm-elf
+CC		= $(PREFIX)-gcc
+AR		= $(PREFIX)-ar
+CFLAGS		= -Os -g -Wall -Wextra -I../include -fno-common \
+		  -mcpu=cortex-m3 -mthumb
+ARFLAGS		= rcsv
+LIBNAME		= libopenstm32
+OBJS		= gpio.o
+
+all: $(LIBNAME).a
+
+$(LIBNAME).a: $(OBJS)
+	$(AR) $(ARFLAGS) $@ $^
+
+clean:
+	rm -f *.o $(LIBNAME).a
+

lib/gpio.c

@@ -0,0 +1,36 @@
+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "libopenstm32/gpio.h"
+
+void gpio_set(int gpio)
+{
+	/* TODO */
+}
+
+void gpio_clear(int gpio)
+{
+	/* TODO */
+}
+
+void gpio_toggle(int gpio)
+{
+	/* TODO */
+}