Documentation structures added to place the non-STM32 families into the documentation tree.

Actual documentation has not been added. Volunteers?

lib/lpc17xx/gpio.c

@@ -1,3 +1,16 @@
+/** @defgroup gpio_file GPIO
+
+@ingroup LPC17xx
+
+@brief <b>libopencm3 LPC17xx General Purpose I/O</b>
+
+@version 1.0.0
+
+@author @htmlonly &copy; @endhtmlonly 2009 Uwe Hermann <uwe@hermann-uwe.de>
+
+LGPL License Terms @ref lgpl_license
+*/
+
 /*
  * This file is part of the libopencm3 project.
  *
@@ -17,6 +30,8 @@
  * along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**@{*/
+
 #include <libopencm3/lpc17xx/gpio.h>
 
 void gpio_set(u32 gpioport, u32 gpios)
@@ -28,3 +43,6 @@ void gpio_clear(u32 gpioport, u32 gpios)
 {
         GPIO_CLR(gpioport) = gpios;
 }
+
+/**@}*/
+