+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2000 Bernardo Innocenti <bernie@develer.com>
- *
- * -->
- *
- * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
- *
- * \brief Hardware independent timer driver (interface)
- */
-
-#ifndef DRV_TIMER_H
-#define DRV_TIMER_H
-
-#include <cfg/os.h>
-#include <cfg/macros.h>
-#include <cpu/attr.h>
-#include <cpu/irq.h>
-
-
-/*
- * Include platform-specific binding header if we're hosted.
- * Try the CPU specific one for bare-metal environments.
- */
-#if OS_HOSTED
- #include OS_HEADER(timer)
-#else
- #include CPU_HEADER(timer)
-#endif
-
-#include <mware/list.h>
-#include <cfg/debug.h>
-#include <cfg/compiler.h>
-#include <appconfig.h>
-
-
-extern volatile ticks_t _clock;
-
-/**
- * \brief Return the system tick counter (expressed in ticks)
- *
- * The result is guaranteed to increment monotonically,
- * but client code must be tolerant with respect to overflows.
- *
- * The following code is safe:
- *
- * \code
- * ticks_t tea_start_time = timer_clock();
- *
- * boil_water();
- *
- * if (timer_clock() - tea_start_time > TEAPOT_DELAY)
- * printf("Your tea, Sir.\n");
- * \endcode
- *
- * \note This function must disable interrupts on 8/16bit CPUs because the
- * clock variable is larger than the processor word size and can't
- * be copied atomically.
- */
-INLINE ticks_t timer_clock(void)
-{
- ticks_t result;
-
- ATOMIC(result = _clock);
-
- return result;
-}
-
-/**
- * Faster version of timer_clock(), to be called only when the timer
- * interrupt is disabled (DISABLE_INTS) or overridden by a
- * higher-priority or non-nesting interrupt.
- *
- * \sa timer_clock
- */
-INLINE ticks_t timer_clock_unlocked(void)
-{
- return _clock;
-}
-
-/** Convert \a ms [ms] to ticks. */
-INLINE ticks_t ms_to_ticks(mtime_t ms)
-{
-#if TIMER_TICKS_PER_SEC < 1000
- /* Slow timer: avoid rounding down too much. */
- return (ms * TIMER_TICKS_PER_SEC) / 1000;
-#else
- /* Fast timer: don't overflow ticks_t. */
- return ms * DIV_ROUND(TIMER_TICKS_PER_SEC, 1000);
-#endif
-}
-
-/** Convert \a us [us] to ticks. */
-INLINE ticks_t us_to_ticks(utime_t us)
-{
-#if TIMER_TICKS_PER_SEC < 1000
- /* Slow timer: avoid rounding down too much. */
- return ((us / 1000) * TIMER_TICKS_PER_SEC) / 1000;
-#else
- /* Fast timer: don't overflow ticks_t. */
- return (us * DIV_ROUND(TIMER_TICKS_PER_SEC, 1000)) / 1000;
-#endif
-}
-
-/** Convert \a ticks [ticks] to ms. */
-INLINE mtime_t ticks_to_ms(ticks_t ticks)
-{
-#if TIMER_TICKS_PER_SEC < 1000
- /* Slow timer: avoid rounding down too much. */
- return (ticks * 1000) / TIMER_TICKS_PER_SEC;
-#else
- /* Fast timer: avoid overflowing ticks_t. */
- return ticks / (TIMER_TICKS_PER_SEC / 1000);
-#endif
-}
-
-/** Convert \a ticks [ticks] to us. */
-INLINE utime_t ticks_to_us(ticks_t ticks)
-{
-#if TIMER_TICKS_PER_SEC < 1000
- /* Slow timer: avoid rounding down too much. */
- return ((ticks * 1000) / TIMER_TICKS_PER_SEC) * 1000;
-#else
- /* Fast timer: avoid overflowing ticks_t. */
- return (ticks / (TIMER_TICKS_PER_SEC / 1000)) * 1000;
-#endif
-}
-
-/** Convert \a us [us] to hpticks */
-INLINE hptime_t us_to_hptime(utime_t us)
-{
-#if TIMER_HW_HPTICKS_PER_SEC > 10000000UL
- return us * DIV_ROUND(TIMER_HW_HPTICKS_PER_SEC, 1000000UL);
-#else
- return (us * ((TIMER_HW_HPTICKS_PER_SEC + 500) / 1000UL) + 500) / 1000UL;
-#endif
-}
-
-/** Convert \a hpticks [hptime] to usec */
-INLINE utime_t hptime_to_us(hptime_t hpticks)
-{
-#if TIMER_HW_HPTICKS_PER_SEC < 100000UL
- return hpticks * DIV_ROUND(1000000UL, TIMER_HW_HPTICKS_PER_SEC);
-#else
- return (hpticks * 1000UL) / DIV_ROUND(TIMER_HW_HPTICKS_PER_SEC, 1000UL);
-#endif /* TIMER_HW_HPTICKS_PER_SEC < 100000UL */
-}
-
-
-void timer_init(void);
-void timer_delayTicks(ticks_t delay);
-INLINE void timer_delay(mtime_t delay)
-{
- timer_delayTicks(ms_to_ticks(delay));
-}
-
-#if !defined(CONFIG_TIMER_DISABLE_UDELAY)
-void timer_busyWait(hptime_t delay);
-void timer_delayHp(hptime_t delay);
-INLINE void timer_udelay(utime_t delay)
-{
- timer_delayHp(us_to_hptime(delay));
-}
-#endif
-
-#ifndef CONFIG_TIMER_DISABLE_EVENTS
-
-#include <mware/event.h>
-
-/**
- * The timer driver supports multiple synchronous timers
- * that can trigger an event when they expire.
- *
- * \sa timer_add()
- * \sa timer_abort()
- */
-typedef struct Timer
-{
- Node link; /**< Link into timers queue */
- ticks_t _delay; /**< Timer delay in ms */
- ticks_t tick; /**< Timer will expire at this tick */
- Event expire; /**< Event to execute when the timer expires */
- DB(uint16_t magic;)
-} Timer;
-
-/** Timer is active when Timer.magic contains this value (for debugging purposes). */
-#define TIMER_MAGIC_ACTIVE 0xABBA
-#define TIMER_MAGIC_INACTIVE 0xBAAB
-
-extern void timer_add(Timer *timer);
-extern Timer *timer_abort(Timer *timer);
-
-/** Set the timer so that it calls an user hook when it expires */
-INLINE void timer_set_event_softint(Timer *timer, Hook func, iptr_t user_data)
-{
- event_initSoftInt(&timer->expire, func, user_data);
-}
-
-/** Set the timer delay (the time before the event will be triggered) */
-INLINE void timer_setDelay(Timer *timer, ticks_t delay)
-{
- timer->_delay = delay;
-}
-
-#endif /* CONFIG_TIMER_DISABLE_EVENTS */
-
-#if defined(CONFIG_KERN_SIGNALS) && CONFIG_KERN_SIGNALS
-
-/** Set the timer so that it sends a signal when it expires */
-INLINE void timer_set_event_signal(Timer *timer, struct Process *proc, sigmask_t sigs)
-{
- event_initSignal(&timer->expire, proc, sigs);
-}
-
-#endif /* CONFIG_KERN_SIGNALS */
-
-
-#endif /* DRV_TIMER_H */
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