mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-08 23:08:29 +00:00
94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2008 Swedish Institute of Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of the copyright holders nor the names of
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/**
|
|
* \file
|
|
*
|
|
* \brief
|
|
* This file implements a beep function to emit a beep sound from Raven's
|
|
* speaker.
|
|
*
|
|
* \author
|
|
* Mike Vidales mavida404@gmail.com
|
|
*
|
|
*/
|
|
|
|
|
|
#include "beep.h"
|
|
#include "key.h"
|
|
|
|
/**
|
|
* \addtogroup lcd
|
|
* \{
|
|
*/
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Emits a beep from the Raven's buzzer. This routine simply toggles a port pin
|
|
* at an audio frequency, which causes a tone to be emitted from the Raven's speaker.
|
|
* The beep consists of two tones at two different frequencies. At the end, the beeper
|
|
* port pin is kept low, which causes the speaker amplifier to shut down.
|
|
*/
|
|
void
|
|
beep(void)
|
|
{
|
|
uint8_t i;
|
|
volatile uint8_t j;
|
|
|
|
/* Turn on the power to the speaker. */
|
|
ENTER_DDR |= (1 << PE7);
|
|
ENTER_PUR |= (1 << PE7);
|
|
|
|
/* Setup port pin */
|
|
BEEP_DDR |= (1 << BEEP_BIT);
|
|
|
|
for (i=0;i<100;i++){
|
|
/* Toggle port pin */
|
|
BEEP_PIN |= (1 << BEEP_BIT);
|
|
/* Delay loop */
|
|
for (j=0;j<0xff;j++)
|
|
;
|
|
}
|
|
|
|
for (i=0;i<100;i++){
|
|
/* Toggle port pin */
|
|
BEEP_PIN |= (1 << BEEP_BIT);
|
|
/* Delay loop */
|
|
for (j=0;j<0xa0;j++)
|
|
;
|
|
}
|
|
|
|
/* Turn off speaker */
|
|
BEEP_PORT &= ~(1 << BEEP_BIT);
|
|
ENTER_PUR &= ~(1 << PE7);
|
|
}
|
|
|
|
/** \} */
|