doxygen of gtimer

docs/src/gtimer.dox

@@ -0,0 +1,36 @@
+/*	
+	ChibiOS/GFX - Copyright (C) 2012
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS/GFX.
+
+    ChibiOS/GFX 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 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/GFX 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @addtogroup GTIMER
+ * @details The GTIMER module provides high level, simple and hardware
+ * 			independend timers. The timers are meant to be used in different
+ *			ChibiOS/GFX modules and are not very accurate. 
+ *			
+ * @details	The reason why ChibiOS/GFX has it's own timer abstraction is because
+ *			virtual timers provided by ChibiOS/RT are interrupt context only.
+ *			While great for what they are designed for, they make coding of the input
+ *			drivers much more complex.
+ *			For non-performance critical drivers like these input drivers,  it would also
+ *			hog an in-ordinate amount of critical (interrupt locked) system time.
+ *			This contrary to the goals of a real-time operating system. So a user-land
+ *			(thread based) timer mechanism is also required.
+ */
+

include/gtimer.h

@@ -69,7 +69,9 @@
 // A callback function (executed in a thread context)
 typedef void (*GTimerFunction)(void *param);
 
-// A GTimer structure.
+/**
+ * @brief	 A GTimer structure
+ */
 typedef struct GTimer_t {
 	GTimerFunction		fn;
 	void				*param;
@@ -78,7 +80,7 @@ typedef struct GTimer_t {
 	uint16_t			flags;
 	struct GTimer_t		*next;
 	struct GTimer_t		*prev;
-	} GTimer;
+} GTimer;
 
 /*===========================================================================*/
 /* External declarations.                                                    */