//ICC-AVR application builder : 2011-01-21 ¿ÀÈÄ 4:13:58
// Target : M128
// Crystal: 16.000Mhz

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

#define done 	  1
#define undone 	  0

#define x		  0
#define y		  1
#define z		  2

volatile unsigned int value[3];
volatile unsigned char adcstatus = undone, xyzstatus = x;

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

// scanf ÇÔ¼ö »ç¿ë½Ã Ãß°¡ÇÒ °Í.
int getchar(void)
{
    while ((UCSR0A & 0x80) == 0);
    return UDR0;
}

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  = 0x00;
 PORTG = 0x00;
 DDRG  = 0x00;
}

//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;
}

//ADC initialize
// Conversion time: 104uS
void adc_init(void)
{
 ADCSRA = 0x00; //disable adc
 ADMUX = 0x02; //select adc input 0
 ACSR  = 0x80;
 ADCSRA = 0x0F;
 ADCSRA |= 0xC0;
}

#pragma interrupt_handler adc_isr:iv_ADC
void adc_isr(void)
{
 //conversion complete, read value (int) using...
 // value=ADCL;            //Read 8 low bits first (important)
 // value|=(int)ADCH << 8; //read 2 high bits and shift into top byte
 
 value[xyzstatus] = ADCL;
 value[xyzstatus] |= (int)ADCH << 8;
 adcstatus = done;
}

//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();
 adc_init();

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

//
void main(void)
{
 init_devices();
 //insert your functional code here...
 while(1)
 {
  if(adcstatus)
  {
   printf("\r\nADC Data : %d, %d, %d", value[0], value[1], value[2]);
   adcstatus = undone;
   xyzstatus++;
   xyzstatus = (xyzstatus%3);
   ADMUX = xyzstatus*2;
  }
  ADCSRA |= (1<<ADSC);
 }
}