//ICC-AVR application builder : 2011-12-31 오후 5:42:51
// Target : M128
// Crystal: 16.000Mhz

#include <iom128v.h>
#include <macros.h>
#include <stdio.h>

#define C1 523 // 도
#define C1_ 554
#define D1 587 // 레
#define D1_ 622
#define E1 659 // 미
#define F1 699 // 파 
#define F1_ 740
#define G1 784 // 솔
#define G1_ 831
#define A1 880 // 라
#define A1_ 932
#define B1 988 // 시

#define C2 C1*2 // 도
#define C2_ C1_*2
#define D2 D1*2 // 레
#define D2_ D1_*2
#define E2 E1*2 // 미
#define F2 F1*2 // 파 
#define F2_ F1_*2
#define G2 G1*2 // 솔
#define G2_ G1_*2
#define A2 A2*2 // 라
#define A2_ A2_*2
#define B2 B2*2 // 시

#define DLY_1 DLY_4*4 // 온음표
#define DLY_2 DLY_4*2 // 2분 음표
#define DLY_4 400 // 4분 음표
#define DLY_8 DLY_4/2 // 8분 음표
#define DLY_16 DLY_8/2 // 16분 음표

volatile int schoolsong[100]={G1,G1,A1,A1,G1,G1,E1,G1,G1,E1,E1,D1,G1,G1,A1,A1,G1,G1,E1,G1,E1,D1,E1,C1};
volatile int length[100]={DLY_4,DLY_4,DLY_4,DLY_4,DLY_4,DLY_4,DLY_2,DLY_4,DLY_4,DLY_4,DLY_4,DLY_1,DLY_4,DLY_4,DLY_4,DLY_4,DLY_4,DLY_4,DLY_2,DLY_4,DLY_4,DLY_4,DLY_4,DLY_1,};

volatile unsigned char TIMER=0x06;
volatile long value;

void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0x00;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
 PORTE = 0x00;
 DDRE  = 0x00;
 PORTF = 0x00;
 DDRF  = 0x80;
 PORTG = 0x00;
 DDRG  = 0x10;
}

//TIMER0 initialize - prescale:64
// WGM: Normal
// desired value: 1KHz
// actual value:  1.000KHz (0.0%)
void timer0_init(void)
{
 TCCR0 = 0x00; //stop
 ASSR  = 0x00; //set async mode
 TCNT0 = 0x06; //set count
 OCR0  = 0xFA;
 TCCR0 = 0x04; //start timer
}

#pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF
void timer0_ovf_isr(void)
{
 TCNT0 = TIMER; //reload counter value
 PORTF ^= 0x80;
}

int putchar(char c)
{
    while (((UCSR0A>>UDRE0)&0x01) == 0) ;  // UDRE, data register empty
       
    UDR0 = c;
    return c;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSR0B = 0x00; //disable while setting baud rate
 UCSR0A = 0x00;
 UCSR0C = 0x06;
 UBRR0L = 0x67; //set baud rate lo
 UBRR0H = 0x00; //set baud rate hi
 UCSR0B = 0x18;
}
//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 XDIV  = 0x00; //xtal divider
 XMCRA = 0x00; //external memory
 port_init();
 //uart0_init();
 timer0_init();

 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EICRB = 0x00; //extended ext ints
 EIMSK = 0x00;
 TIMSK = 0x01; //timer interrupt sources
 ETIMSK = 0x00; //extended timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

void delay(int delaytime){
    int i,j;
 for(i=0;i<=1000;i++){
  for(j=0;j<=delaytime;j++){
  }
 }
}

//
void main(void)
{
 int freq = 1000, i,j;
 
 init_devices();
 //insert your functional code here...
 
   
 while(1){

for(j=0;j<10000;j++){
  for(i=0;i<20000;i++){
  freq = (50-i)*10+j;   
  value =  255-(1000000/(8*freq));   // value =  255-((1/(2*freq)) / (4/1000000));
  TIMER = value;
  delay(100);  
 } 
 }
  for(i=0;i<50;i++){
  freq = i*100;   
  value =  255-(1000000/(8*freq));   // value =  255-((1/(2*freq)) / (4/1000000));
  TIMER = value;
  delay(1);  
 }

 
  
      
 }
}