Add function to read hp ticks.

[bertos.git] / bertos / cpu / cortex-m3 / drv / timer_cm3.h

diff --git a/bertos/cpu/cortex-m3/drv/timer_cm3.h b/bertos/cpu/cortex-m3/drv/timer_cm3.h
index 54bb4bebbeb378a8a85a2adb7c73c02a84f04a83..3e47d294912bacc447ad4b1bc628001ed79a24b5 100644 (file)
--- a/bertos/cpu/cortex-m3/drv/timer_cm3.h
+++ b/bertos/cpu/cortex-m3/drv/timer_cm3.h
@@ -38,6 +38,8 @@
 #ifndef TIMER_CM3_H
 #define TIMER_CM3_H
 
+#include "cfg/cfg_timer.h"     /* CONFIG_TIMER */
+
 #if CPU_CM3_LM3S
        #include <io/lm3s.h>
 #elif CPU_CM3_STM32
@@ -52,40 +54,54 @@
  *
  * Select which hardware timer interrupt to use for system clock and softtimers.
  *
- * $WIZ$ timer_select = "TIMER_DEFAULT"
+ * $WIZ$ timer_select = "TIMER_DEFAULT", "TIMER_ON_GPTM"
  */
-#define TIMER_DEFAULT  /*  */ ///< Default system timer
+#define TIMER_ON_GPTM  1
+
+#define TIMER_DEFAULT  TIMER_ON_GPTM ///< Default system timer
+
+#if (CONFIG_TIMER == TIMER_ON_GPTM)
+       /* Ticks frequency (HZ) */
+       #define TIMER_TICKS_PER_SEC     1000
+
+       /* Frequency of the hardware high-precision timer. */
+       #define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ)
 
-/* Ticks frequency (HZ) */
-#define TIMER_TICKS_PER_SEC    1000
+       /* Maximum value of the high-precision hardware counter register */
+       #define TIMER_HW_CNT (CPU_FREQ / TIMER_TICKS_PER_SEC)
 
-/* Frequency of the hardware high-precision timer. */
-#define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ)
+       /** Type of time expressed in ticks of the hardware high-precision timer */
+       typedef uint32_t hptime_t;
+       #define SIZEOF_HPTIME_T 4
 
-/* Maximum value of the high-precision hardware counter register */
-#define TIMER_HW_CNT (CPU_FREQ / TIMER_TICKS_PER_SEC)
+       /* Timer ISR prototype */
+       ISR_PROTO_CONTEXT_SWITCH(timer_handler);
+       #define DEFINE_TIMER_ISR DECLARE_ISR_CONTEXT_SWITCH(timer_handler)
 
-/** Type of time expressed in ticks of the hardware high-precision timer */
-typedef uint32_t hptime_t;
-#define SIZEOF_HPTIME_T 4
+       INLINE void timer_hw_irq(void)
+       {
+       }
 
-/* Timer ISR prototype */
-ISR_PROTO_CONTEXT_SWITCH(timer_handler);
-#define DEFINE_TIMER_ISR DECLARE_ISR_CONTEXT_SWITCH(timer_handler)
 
-INLINE void timer_hw_irq(void)
-{
-}
+       INLINE bool timer_hw_triggered(void)
+       {
+               return true;
+       }
 
-INLINE bool timer_hw_triggered(void)
-{
-       return true;
-}
+       INLINE hptime_t timer_hw_hpread(void)
+       {
+               return NVIC_ST_CURRENT_R;
+       }
+
+       INLINE hptime_t timer_hw_hpticks(ticks_t clock)
+       {
+               return (TIMER_HW_CNT - timer_hw_hpread()) + clock * TIMER_HW_CNT;
+       }
+
+#else
 
-INLINE hptime_t timer_hw_hpread(void)
-{
-       return NVIC_ST_CURRENT_R;
-}
+       #error Unimplemented value for CONFIG_TIMER
+#endif /* CONFIG_TIMER */
 
 void timer_hw_init(void);
 void timer_hw_exit(void);