contiki/platform/avr-ravenlcd/beep.c

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/*
* 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. Also polyphonic ringtones.
*
* \author
* Mike Vidales mavida404@gmail.com
* David Kopf dak664@embarqmail.com
*
*/
#include "beep.h"
#include "key.h"
#include <stdlib.h>
#include "util/delay.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);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Play polyphonic tune using buzzer. An 8 bit timer generates interrupts
* that flip the BEEP pin at the selected frequencies.
* On exit the beeper port pin is set low to shut down the speaker amplifier.
*/
/* Base interrupts per second, and interrupts for each note */
//#define BASE 31250
#define BASE 31250/2 //up one octave
#define NONE 0
#define C4 BASE/262
#define CS4 BASE/277
#define D4 BASE/294
#define DS4 BASE/311
#define E4 BASE/330
#define F4 BASE/349
#define FS4 BASE/370
#define G4 BASE/392
#define GS4 BASE/415
#define A4 BASE/440
#define AS4 BASE/466
#define B4 BASE/494
#define C5 BASE/523
#define CS5 BASE/554
#define D5 BASE/587
#define DS5 BASE/622
#define E5 BASE/659
#define F5 BASE/698
#define FS5 BASE/740
#define G5 BASE/784
#define GS5 BASE/831
#define A5 BASE/880
#define AS5 BASE/932
/* Tone reference length and internote gap, milliseconds */
#define TONE_LENGTH 60
#define TONE_GAP 20
static uint8_t tuneindex=0;
static uint8_t pictures[] PROGMEM = {G4,4, F4,4, AS4,4, C5,2, F5,2, D5,4, C5,2, F5,2, D5,4, AS4,4, C5,4, G4,4, F4,4, 0xff};
static uint8_t axel[] PROGMEM = {FS4,2, NONE,2, A4,3, FS4,2, FS4,1, B4,2, FS4,2, E4,2, FS4,2, NONE,2, CS5,3, FS4,2, FS4,1, D5,2, CS5,2, A4,2, FS4,2, CS5,2, FS5,2, FS4,1, E4,2, E4,1, CS4,2, GS4,2, FS4,6, 0xff};
static uint8_t sandman1[] PROGMEM = {F4,2, G4,2, B4,4, A4,10, B4,2, B4,2, A4,2, B4,12, 0xff};
static uint8_t sandman2[] PROGMEM = {C4,2, E4,2, G4,2, B4,2, A4,2, G4,2, E4,2, C4,2, D4,2, F4,2, A4,2, C5,2, B4,8, 0xff};
static uint8_t furelise[] PROGMEM = {E5,1, DS5,1, E5,1, DS5,1, E5,1, B4,1, D5,1, E5,1, A4,2, NONE,1, C4,1, E4,1, A4,1, B4,2, NONE,1, E4,1, GS4,1, B4,1, C5,2, 0xff};
static volatile uint8_t icnt,tone;
#include <avr/interrupt.h>
ISR(TIMER0_OVF_vect)
{
if (tone == NONE) icnt = 0;
else if (icnt++ >= tone)
{
BEEP_PIN |= (1 << BEEP_BIT);
icnt = 0;
}
}
void play_ringtone(void)
{
uint8_t i,*noteptr;
/* What's next on the playlist? */
switch (tuneindex++) {
case 1 :beep();return;
case 2 :noteptr=sandman1;break;
case 3 :noteptr=furelise;break;
case 4 :noteptr=sandman2;break;
case 5 :noteptr=axel;break;
default:noteptr=pictures;tuneindex=1;break;
}
/* Turn on the power to the speaker. */
ENTER_DDR |= (1 << PE7);
ENTER_PUR |= (1 << PE7);
/* Setup port pin */
BEEP_DDR |= (1 << BEEP_BIT);
/* Start with no tone */
icnt = 0;
tone = NONE;
/* Clock 8 bit timer at maximum frequency (CS0=1), interrupt overflow */
/* 8MHz / 256 = 31250 interrupts per second */
TCCR0A |= _BV(CS00);
TCNT0 = 0;
TIMSK0 |= _BV(TOIE0);
/* Play all the notes */
for (;;) {
tone=pgm_read_byte(noteptr++);
if (tone==0xff) break;
for (i = pgm_read_byte(noteptr++);i > 0; i--) _delay_us(1000UL*TONE_LENGTH);
tone = NONE;_delay_us(1000UL*TONE_GAP);
}
/* Turn off interrupts and speaker */
TIMSK0 &= ~_BV(TOIE0);
BEEP_PORT &= ~(1 << BEEP_BIT);
ENTER_PUR &= ~(1 << PE7);
}
/** \} */