200 lines
6.1 KiB
C
200 lines
6.1 KiB
C
/*
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* Copyright (c) 2008 Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* \brief
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* This file implements a beep function to emit a beep sound from Raven's
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* speaker. Also polyphonic ringtones.
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*
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* \author
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* Mike Vidales mavida404@gmail.com
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* David Kopf dak664@embarqmail.com
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*
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*/
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#include "beep.h"
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#include "key.h"
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#include <stdlib.h>
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#include "util/delay.h"
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/**
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* \addtogroup lcd
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* \{
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Emits a beep from the Raven's buzzer. This routine simply toggles a port pin
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* at an audio frequency, which causes a tone to be emitted from the Raven's speaker.
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* The beep consists of two tones at two different frequencies. At the end, the beeper
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* port pin is kept low, which causes the speaker amplifier to shut down.
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*/
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void
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beep(void)
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{
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uint8_t i;
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volatile uint8_t j;
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/* Turn on the power to the speaker. */
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ENTER_DDR |= (1 << PE7);
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ENTER_PUR |= (1 << PE7);
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/* Setup port pin */
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BEEP_DDR |= (1 << BEEP_BIT);
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for (i=0;i<100;i++){
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/* Toggle port pin */
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BEEP_PIN |= (1 << BEEP_BIT);
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/* Delay loop */
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for (j=0;j<0xff;j++)
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;
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}
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for (i=0;i<100;i++){
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/* Toggle port pin */
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BEEP_PIN |= (1 << BEEP_BIT);
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/* Delay loop */
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for (j=0;j<0xa0;j++)
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;
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}
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/* Turn off speaker */
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BEEP_PORT &= ~(1 << BEEP_BIT);
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ENTER_PUR &= ~(1 << PE7);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Play polyphonic tune using buzzer. An 8 bit timer generates interrupts
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* that flip the BEEP pin at the selected frequencies.
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* On exit the beeper port pin is set low to shut down the speaker amplifier.
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*/
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/* Base interrupts per second, and interrupts for each note */
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//#define BASE 31250
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#define BASE 31250/2 //up one octave
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#define NONE 0
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#define C4 BASE/262
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#define CS4 BASE/277
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#define D4 BASE/294
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#define DS4 BASE/311
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#define E4 BASE/330
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#define F4 BASE/349
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#define FS4 BASE/370
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#define G4 BASE/392
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#define GS4 BASE/415
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#define A4 BASE/440
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#define AS4 BASE/466
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#define B4 BASE/494
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#define C5 BASE/523
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#define CS5 BASE/554
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#define D5 BASE/587
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#define DS5 BASE/622
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#define E5 BASE/659
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#define F5 BASE/698
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#define FS5 BASE/740
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#define G5 BASE/784
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#define GS5 BASE/831
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#define A5 BASE/880
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#define AS5 BASE/932
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/* Tone reference length and internote gap, milliseconds */
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#define TONE_LENGTH 60
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#define TONE_GAP 20
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static uint8_t tuneindex=0;
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static const 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};
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static const 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};
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static const uint8_t sandman1[] PROGMEM = {F4,2, G4,2, B4,4, A4,10, B4,2, B4,2, A4,2, B4,12, 0xff};
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static const 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};
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static const 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};
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static volatile uint8_t icnt,tone;
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#include <avr/interrupt.h>
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ISR(TIMER0_OVF_vect)
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{
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if (tone == NONE) icnt = 0;
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else if (icnt++ >= tone)
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{
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BEEP_PIN |= (1 << BEEP_BIT);
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icnt = 0;
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}
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}
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void play_ringtone(void)
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{
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uint8_t i;
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const uint8_t *noteptr;
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/* What's next on the playlist? */
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switch (tuneindex++) {
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case 1 :beep();return;
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case 2 :noteptr=sandman1;break;
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case 3 :noteptr=furelise;break;
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case 4 :noteptr=sandman2;break;
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case 5 :noteptr=axel;break;
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default:noteptr=pictures;tuneindex=1;break;
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}
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/* Turn on the power to the speaker. */
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ENTER_DDR |= (1 << PE7);
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ENTER_PUR |= (1 << PE7);
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/* Setup port pin */
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BEEP_DDR |= (1 << BEEP_BIT);
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/* Start with no tone */
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icnt = 0;
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tone = NONE;
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/* Clock 8 bit timer at maximum frequency (CS0=1), interrupt overflow */
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/* 8MHz / 256 = 31250 interrupts per second */
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TCCR0A |= _BV(CS00);
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TCNT0 = 0;
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TIMSK0 |= _BV(TOIE0);
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/* Play all the notes */
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for (;;) {
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tone=pgm_read_byte(noteptr++);
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if (tone==0xff) break;
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for (i = pgm_read_byte(noteptr++);i > 0; i--) _delay_us(1000UL*TONE_LENGTH);
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tone = NONE;_delay_us(1000UL*TONE_GAP);
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}
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/* Turn off interrupts and speaker */
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TIMSK0 &= ~_BV(TOIE0);
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BEEP_PORT &= ~(1 << BEEP_BIT);
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ENTER_PUR &= ~(1 << PE7);
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}
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/** \} */
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