-/*!
+/**
* \file
* <!--
* Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
/*#*
*#* $Log$
+ *#* Revision 1.32 2007/10/08 12:14:32 batt
+ *#* Fix some review issues.
+ *#*
+ *#* Revision 1.31 2007/10/07 12:30:55 batt
+ *#* Add default timer for AVR.
+ *#*
+ *#* Revision 1.30 2007/06/07 14:35:12 batt
+ *#* Merge from project_ks.
+ *#*
+ *#* Revision 1.29 2007/03/21 11:01:36 batt
+ *#* Add missing support for ATMega1281.
+ *#*
+ *#* Revision 1.28 2006/07/19 12:56:26 bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.27 2006/05/18 00:38:24 bernie
+ *#* Use hw_cpu.h instead of ubiquitous hw.h.
+ *#*
+ *#* Revision 1.26 2006/02/21 21:28:02 bernie
+ *#* New time handling based on TIMER_TICKS_PER_SEC to support slow timers with ticks longer than 1ms.
+ *#*
*#* Revision 1.25 2005/07/19 07:26:37 bernie
*#* Refactor to decouple timer ticks from milliseconds.
*#*
#ifndef DRV_TIMER_AVR_H
#define DRV_TIMER_AVR_H
-#include <appconfig.h> /* CONFIG_TIMER */
-#include <hw.h>
+#include <appconfig.h> /* CONFIG_TIMER */
+#include <cfg/compiler.h> /* uint8_t */
+#include <hw_cpu.h> /* CLOCK_FREQ */
-/*!
- * Values for CONFIG_TIMER.
+/**
+ * \name Values for CONFIG_TIMER.
*
* Select which hardware timer interrupt to use for system clock and softtimers.
* \note The timer 1 overflow mode set the timer as a 24 kHz PWM.
+ *
+ * \{
*/
#define TIMER_ON_OUTPUT_COMPARE0 1
#define TIMER_ON_OVERFLOW1 2
#define TIMER_ON_OUTPUT_COMPARE2 3
#define TIMER_ON_OVERFLOW3 4
-/*! HW dependent timer initialization */
+#define TIMER_DEFAULT TIMER_ON_OUTPUT_COMPARE0 ///< Default system timer
+/* \} */
+
+/*
+ * Hardware dependent timer initialization.
+ */
#if (CONFIG_TIMER == TIMER_ON_OUTPUT_COMPARE0)
#define TIMER_PRESCALER 64
#define TIMER_HW_BITS 8
#define DEFINE_TIMER_ISR SIGNAL(SIG_OUTPUT_COMPARE0)
- #define TIMER_TICKS_PER_MSEC 1
+ #define TIMER_TICKS_PER_SEC 1000
#define TIMER_HW_CNT OCR_DIVISOR
- //! 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 uint8_t hptime_t;
#elif (CONFIG_TIMER == TIMER_ON_OVERFLOW1)
#define TIMER_PRESCALER 1
#define TIMER_HW_BITS 8
- /*! This value is the maximum in overflow based timers. */
+ /** This value is the maximum in overflow based timers. */
#define TIMER_HW_CNT (1 << TIMER_HW_BITS)
#define DEFINE_TIMER_ISR SIGNAL(SIG_OVERFLOW1)
- #define TIMER_TICKS_PER_MSEC (((TIMER_HW_HPTICKS_PER_SEC + TIMER_HW_CNT / 2) / TIMER_HW_CNT + 500) / 1000)
+ #define TIMER_TICKS_PER_SEC ((TIMER_HW_HPTICKS_PER_SEC + TIMER_HW_CNT / 2) / TIMER_HW_CNT)
- //! 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 uint16_t hptime_t;
#elif (CONFIG_TIMER == TIMER_ON_OUTPUT_COMPARE2)
#define TIMER_PRESCALER 64
#define TIMER_HW_BITS 8
- #define DEFINE_TIMER_ISR SIGNAL(SIG_OUTPUT_COMPARE2)
- #define TIMER_TICKS_PER_MSEC 1
- /*! Value for OCR register in output-compare based timers. */
+ #if CPU_AVR_ATMEGA1281 || CPU_AVR_ATMEGA168
+ #define DEFINE_TIMER_ISR SIGNAL(SIG_OUTPUT_COMPARE2A)
+ #else
+ #define DEFINE_TIMER_ISR SIGNAL(SIG_OUTPUT_COMPARE2)
+ #endif
+ #define TIMER_TICKS_PER_SEC 1000
+ /** Value for OCR register in output-compare based timers. */
#define TIMER_HW_CNT OCR_DIVISOR
- //! 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 uint8_t hptime_t;
#elif (CONFIG_TIMER == TIMER_ON_OVERFLOW3)
#define TIMER_PRESCALER 1
#define TIMER_HW_BITS 8
- /*! This value is the maximum in overflow based timers. */
+ /** This value is the maximum in overflow based timers. */
#define TIMER_HW_CNT (1 << TIMER_HW_BITS)
#define DEFINE_TIMER_ISR SIGNAL(SIG_OVERFLOW3)
- #define TIMER_TICKS_PER_MSEC (((TIMER_HW_HPTICKS_PER_SEC + TIMER_HW_CNT / 2) / TIMER_HW_CNT + 500) / 1000)
+ #define TIMER_TICKS_PER_SEC ((TIMER_HW_HPTICKS_PER_SEC + TIMER_HW_CNT / 2) / TIMER_HW_CNT)
- //! 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 uint16_t hptime_t;
#else
#endif /* CONFIG_TIMER */
-/*! Frequency of the hardware high precision timer */
+/** Frequency of the hardware high precision timer. */
#define TIMER_HW_HPTICKS_PER_SEC ((CLOCK_FREQ + TIMER_PRESCALER / 2) / TIMER_PRESCALER)
-/*!
+/**
* System timer: additional division after the prescaler
* 12288000 / 64 / 192 (0..191) = 1 ms
*/
-#define OCR_DIVISOR (((CLOCK_FREQ + TIMER_PRESCALER / 2) / TIMER_PRESCALER + TICKS_PER_SEC / 2) / TICKS_PER_SEC - 1) /* 191 */
+#define OCR_DIVISOR (((CLOCK_FREQ + TIMER_PRESCALER / 2) / TIMER_PRESCALER + TIMER_TICKS_PER_SEC / 2) / TIMER_TICKS_PER_SEC - 1)
-/*! Not needed, IRQ timer flag cleared automatically */
+/** Not needed, IRQ timer flag cleared automatically */
#define timer_hw_irq() do {} while (0)
+/** Not needed, timer IRQ handler called only for timer source */
+#define timer_hw_triggered() (true)
+
#endif /* DRV_TIMER_AVR_H */
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