From d930ce0e2b855f1f96c0f8b7d937aa0241d510ba Mon Sep 17 00:00:00 2001
From: maralvira <maralvira>
Date: Sun, 7 Nov 2010 14:24:36 +0000
Subject: [PATCH] Add some useful timer macros

---
 cpu/mc1322x/lib/include/tmr.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/cpu/mc1322x/lib/include/tmr.h b/cpu/mc1322x/lib/include/tmr.h
index 975d116ff..49ceac607 100644
--- a/cpu/mc1322x/lib/include/tmr.h
+++ b/cpu/mc1322x/lib/include/tmr.h
@@ -30,7 +30,7 @@
  * This file is part of libmc1322x: see http://mc1322x.devl.org
  * for details. 
  *
- * $Id: tmr.h,v 1.7 2010/11/07 14:24:11 maralvira Exp $
+ * $Id: tmr.h,v 1.8 2010/11/07 14:24:36 maralvira Exp $
  */
 
 #ifndef TMR_H
@@ -139,11 +139,15 @@ static volatile struct TMR_struct * const TMR1 = (void *) (TMR1_BASE);
 static volatile struct TMR_struct * const TMR2 = (void *) (TMR2_BASE);
 static volatile struct TMR_struct * const TMR3 = (void *) (TMR3_BASE);
 
+/* Get timer number from the timer pointer. */
+#define TMR_NUM(x) (((uint32_t)(x) - TMR_BASE) / TMR_OFFSET)
+
 /* Used to compute which enable bit to set for a particular timer, e.g.
      TMR0.ENBL |= TMR_ENABLE_BIT(TMR2);
    Helpful when you're using macros to define timers
 */
-#define TMR_ENABLE_BIT(x) (((x) == TMR0) ? 1 : ((x) == TMR1) ? 2 : ((x) == TMR2) ? 4 : ((x) == TMR3) ? 8 : 0)
+#define TMR_ENABLE_BIT(x) (1 << TMR_NUM(x))
+
 #define TMR0_PIN GPIO_08
 #define TMR1_PIN GPIO_09
 #define TMR2_PIN GPIO_10