SOUND CODE

//sched2 modified to include NON-BLOCKING serial code

//used as an example in the program organization doc.

#include <Mega32.h>

#include <stdio.h> //for debugging using printf, etc

//timeout values for each task

#define playsongt2 125

// NoteTable

#define B3 253

#define C4 238

#define CS4 225

#define D4 213

#define DS4 201

#define E4 190

#define F4 179

#define FS4 169

#define G4 159

#define GS4 150

#define A4 142

#define AS4 134

#define B4 127

#define C5 119

#define CS5 113

#define D5 106

#define DS5 101

#define E5 95

#define F5 89

#define FS5 84

#define G5 80

#define GS5 75

#define A5 71

#define AS5 67

#define B5 63

#define C6 60

#define CS6 56

#define D6 53

#define DS6 50

#define E6 47

#define F6 44

#define G6 40

//timer 1 constants

#define prescale1 1

#define clear_on_match 8

//the subroutines

void task1(void); //test for button press

//void task2(unsigned char maxnote, int *song); //increment note to be played

void playsongfunction(void);

//void initialize(void); //all the usual mcu stuff

void InitSound(void); //Initialize sound

void playsong(unsigned char feeling); //play desired song

//void play(void);

unsigned char reload, songNos, maxnote,delay; //timer 0 reload to set 1 mSec

//unsigned char time1, time2, time3; //task scheduleing timeout counters

unsigned char playsongtime;

unsigned char cmd_ready; //set when command is received

unsigned char cmd; //'p'=play 's'=stop

unsigned char note; //current note to be played...

//task 1 sets note to 0 to start song

int *song;

//****************************************************

int happysong[24]={24,C5,E5,G5,0,G5,0,G5,0,E5,G5,0,C5,E5,D5,0,D5,0,G5,0,G5,E5,E5,100};

int excitedsong[22]={22,C5,D5,E5,G5,0,G5,A5,G5,E5,C5,C5,D5,E5,0,E5,D5,0,D5,C5,C5,100};

int boredsong[16]={16,E5,E5,E5,G5,0,G5,G5,0,E5,E5,E5,D5,C5,C5,100};

int sadsong[9]={9,G5,G5,E5,E5,C5,C5,C5,100};

int angrysong[21]={20,G5,0,G5,0,G5,0,E5,E5,0,0,F5,0,F5,0,F5,0,D5,D5,100};

int naughtysong[18]= {18, F5,A5,G5,A5,C6,0,C6,0,F5,A5,G5,A5,F5,0,F5,F5,100};

int gameoversong[25]={25,C5,C5,C5,0,C5,C5,C5,0,C5,DS5,DS5,D5,D5,C5,C5,B4,B4,C5,C5,C5,100};

//**********************************************************

//timer 0 overflow ISR

/*interrupt [TIM0_OVF] void timer0_overflow(void)

{

//reload to force 1 mSec overflow

TCNT0=reload;

//Decrement the three times if they are not already zero

// if (time1>0) --time1;

if (playsongtime>0) --playsongtime;

} */

/*

//**********************************************************

//timer 1 compare-match A ISR

interrupt [TIM1_COMPA] void cmpA_overflow(void)

{

PORTD = ~PORTD; //toggle the port to make a sound

}

//**********************************************************

void playsong(unsigned char feeling)

{

switch(feeling)

{

case 1: //excited

maxnote=excitedsong[0];

song = excitedsong;

break;

case 2: //happy

maxnote = happysong[0];

song = happysong;

break;

case 3: //bored

maxnote=1;

break;

case 4: //bored

maxnote=boredsong[0];

song = boredsong;

break;

case 5: //sad

maxnote=sadsong[0];

song = sadsong;

break;

case 6: //angry

maxnote=angrysong[0];

song = angrysong;

break;

case 7:

maxnote=naughtysong[0];

song=naughtysong;

break;

case 8:

maxnote=gameoversong[0];

song=gameoversong;

break;

}

note = 1;

}

//**********************************************************

//Task 2 -- detect start/} of scale and increment the note

void playsongfunction(void)//(unsigned char maxnote, int *song)

{

if(song[note]==100) //turn off song

note=maxnote;

playsongtime=playsongt2;

if (delay == 1) //reset the task timer

{

delay = 0;

if (note < maxnote) //play a note? or are we done?

{

TCNT2=0; //resets timer2

if(song[note]==0)

{

note++;

TCCR2=0x18; //turn off timer2 to get a pause betweem mptes

}

else

{

OCR2=song[note++]; //and load the correct time out for timer 2

TCCR2 = 0x1E ; //clear timer2 on compare match, start timer 2, toggle OC2 pin

}

}

else

{

TCCR2=0x18; //turn off timer 2

}

}

else

delay++;

}

//**********************************************************

void InitSound(void){

delay = 0;

//set up the ports

DDRD=0xff; // PORT D is an output

PORTD.7=0;

interrupt OC1A

TCCR2 =0x18; //disable timer2, Set CTC bit, Set toggle OC2 on compare match bit

TCNT2 = 0; //and zero the timer

note=1;

playsongtime=playsongt2;

}