X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fcpu%2Farm%2Fdrv%2Ftimer_at91.h;h=0628d3940330d3cbdd4f22bd735d1750d4815035;hb=2db7ecba815ec3054934fe1ea99dac3241391204;hp=eca205c504a22c43c2f95eb80de78142958847f8;hpb=8dabf14299bc6b3b9fc0b4dfdeba91af82aba46c;p=bertos.git

diff --git a/bertos/cpu/arm/drv/timer_at91.h b/bertos/cpu/arm/drv/timer_at91.h
index eca205c5..0628d394 100644
--- a/bertos/cpu/arm/drv/timer_at91.h
+++ b/bertos/cpu/arm/drv/timer_at91.h
@@ -30,8 +30,6 @@
  *
  * -->
  *
- * \version $Id$
- *
  * \author Francesco Sacchi <batt@develer.com>
  *
  * \brief Low-level timer module for Atmel AT91 (interface).
@@ -40,10 +38,13 @@
 #ifndef DRV_AT91_TIMER_H
 #define DRV_AT91_TIMER_H
 
-#include <hw/hw_cpufreq.h>            /* CPU_FREQ */
+#include <hw/hw_cpufreq.h>     /* CPU_FREQ */
 
 #include "cfg/cfg_timer.h"     /* CONFIG_TIMER */
 #include <cfg/compiler.h>      /* uint8_t */
+#include <cfg/macros.h>        /* BV */
+
+#include <io/arm.h>
 
 /**
  * \name Values for CONFIG_TIMER.
@@ -61,21 +62,47 @@
  */
 #if (CONFIG_TIMER == TIMER_ON_PIT)
 
-	void timer_handler(void);
+	/*
+	 * On ARM all system IRQs are handled by the sysirq_dispatcher, so the actual
+	 * timer handler can be treated like any other normal routine.
+	 */
+	#define DEFINE_TIMER_ISR	void timer_handler(void);	\
+					void timer_handler(void)
 
-	#define DEFINE_TIMER_ISR     void timer_handler(void)
 	#define TIMER_TICKS_PER_SEC  1000
 	#define TIMER_HW_CNT         (CPU_FREQ / (16 * TIMER_TICKS_PER_SEC) - 1)
 
 	/** Frequency of the hardware high-precision timer. */
 	#define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ / 16)
 
-	/// Type of time expressed in ticks of the hardware high-precision timer
+	/** 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)
+	{
+		/* Reset counters, this is needed to reset timer and interrupt flags */
+		uint32_t dummy = PIVR;
+		(void) dummy;
+	}
+
+	INLINE bool timer_hw_triggered(void)
+	{
+		return PIT_SR & BV(PITS);
+	}
+
+	INLINE hptime_t timer_hw_hpread(void)
+	{
+		/* In the upper part of PIT_PIIR there is unused data */
+		return PIIR & CPIV_MASK;
+	}
+
 #else
 
 	#error Unimplemented value for CONFIG_TIMER
 #endif /* CONFIG_TIMER */
 
+void timer_hw_init(void);
+
 
 #endif /* DRV_TIMER_AT91_H */