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Mark Qvist 2014-04-03 22:21:37 +02:00
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/**
* \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 1999, 2003 Bernie Innocenti <bernie@codewiz.org>
*
* -->
*
* \brief Buzzer driver (implementation)
*
* \author Bernie Innocenti <bernie@codewiz.org>
* \author Francesco Sacchi <batt@develer.com>
*/
#include "buzzer.h"
#include "hw/hw_buzzer.h"
#include <drv/timer.h>
#include <mware/event.h>
#include <cfg/debug.h>
#include <cfg/module.h>
/* Local vars */
static Timer buz_timer;
static bool buz_timer_running;
static mtime_t buz_repeat_interval;
static mtime_t buz_repeat_duration;
/**
* Turn off buzzer, called by software timer
*/
static void buz_softint(void)
{
if (IS_BUZZER_ON)
{
BUZZER_OFF;
if (buz_repeat_interval)
{
/* Wait for interval time */
timer_setDelay(&buz_timer, ms_to_ticks(buz_repeat_interval));
timer_add(&buz_timer);
}
else
buz_timer_running = false;
}
else if (buz_repeat_interval)
{
/* Wait for beep time */
BUZZER_ON;
timer_setDelay(&buz_timer, ms_to_ticks(buz_repeat_duration));
timer_add(&buz_timer);
}
else
buz_timer_running = false;
}
/**
* Beep for the specified ms time
*/
void buz_beep(mtime_t time)
{
cpu_flags_t flags;
IRQ_SAVE_DISABLE(flags);
/* Remove the software interrupt if it was already queued */
if (buz_timer_running)
timer_abort(&buz_timer);
/* Turn on buzzer */
BUZZER_ON;
/* Add software interrupt to turn the buzzer off later */
buz_timer_running = true;
timer_setDelay(&buz_timer, ms_to_ticks(time));
timer_add(&buz_timer);
IRQ_RESTORE(flags);
}
/**
* Start buzzer repetition
*/
void buz_repeat_start(mtime_t duration, mtime_t interval)
{
buz_repeat_interval = interval;
buz_repeat_duration = duration;
buz_beep(duration);
}
/**
* Stop buzzer repetition
*/
void buz_repeat_stop(void)
{
cpu_flags_t flags;
IRQ_SAVE_DISABLE(flags);
/* Remove the software interrupt if it was already queued */
if (buz_timer_running)
{
timer_abort(&buz_timer);
buz_timer_running = false;
}
buz_repeat_interval = 0;
BUZZER_OFF;
IRQ_RESTORE(flags);
}
MOD_DEFINE(buzzer)
/**
* Initialize buzzer.
*/
void buz_init(void)
{
MOD_CHECK(timer);
BUZZER_HW_INIT;
/* Init software interrupt. */
timer_setSoftint(&buz_timer, (Hook)buz_softint, 0);
MOD_INIT(buzzer);
}