159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
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* Copyright 1999, 2003 Bernie Innocenti <bernie@codewiz.org>
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*
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* -->
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*
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* \brief Buzzer driver (implementation)
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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* \author Francesco Sacchi <batt@develer.com>
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*/
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#include "buzzer.h"
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#include "hw/hw_buzzer.h"
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#include <drv/timer.h>
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#include <mware/event.h>
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#include <cfg/debug.h>
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#include <cfg/module.h>
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/* Local vars */
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static Timer buz_timer;
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static bool buz_timer_running;
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static mtime_t buz_repeat_interval;
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static mtime_t buz_repeat_duration;
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/**
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* Turn off buzzer, called by software timer
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*/
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static void buz_softint(void)
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{
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if (IS_BUZZER_ON)
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{
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BUZZER_OFF;
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if (buz_repeat_interval)
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{
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/* Wait for interval time */
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timer_setDelay(&buz_timer, ms_to_ticks(buz_repeat_interval));
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timer_add(&buz_timer);
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}
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else
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buz_timer_running = false;
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}
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else if (buz_repeat_interval)
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{
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/* Wait for beep time */
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BUZZER_ON;
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timer_setDelay(&buz_timer, ms_to_ticks(buz_repeat_duration));
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timer_add(&buz_timer);
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}
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else
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buz_timer_running = false;
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}
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/**
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* Beep for the specified ms time
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*/
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void buz_beep(mtime_t time)
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{
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cpu_flags_t flags;
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IRQ_SAVE_DISABLE(flags);
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/* Remove the software interrupt if it was already queued */
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if (buz_timer_running)
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timer_abort(&buz_timer);
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/* Turn on buzzer */
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BUZZER_ON;
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/* Add software interrupt to turn the buzzer off later */
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buz_timer_running = true;
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timer_setDelay(&buz_timer, ms_to_ticks(time));
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timer_add(&buz_timer);
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IRQ_RESTORE(flags);
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}
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/**
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* Start buzzer repetition
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*/
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void buz_repeat_start(mtime_t duration, mtime_t interval)
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{
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buz_repeat_interval = interval;
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buz_repeat_duration = duration;
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buz_beep(duration);
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}
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/**
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* Stop buzzer repetition
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*/
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void buz_repeat_stop(void)
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{
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cpu_flags_t flags;
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IRQ_SAVE_DISABLE(flags);
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/* Remove the software interrupt if it was already queued */
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if (buz_timer_running)
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{
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timer_abort(&buz_timer);
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buz_timer_running = false;
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}
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buz_repeat_interval = 0;
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BUZZER_OFF;
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IRQ_RESTORE(flags);
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}
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MOD_DEFINE(buzzer)
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/**
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* Initialize buzzer.
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*/
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void buz_init(void)
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{
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MOD_CHECK(timer);
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BUZZER_HW_INIT;
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/* Init software interrupt. */
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timer_setSoftint(&buz_timer, (Hook)buz_softint, 0);
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MOD_INIT(buzzer);
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}
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