#include <avr/io.h>
#include <stdio.h>

#define FOSC 16000000  //Quarzfrequenz
#define BAUD 9600  //Baudrate
#define MYUBRR FOSC/16/BAUD-1  //Werte für UBRR Register 

#define BV(bit) (1<<(bit))
#define cbi(reg, bit) reg&=~(BV(bit))
#define sbi(reg, bit) reg|=(BV(bit))


int uart_putchar(char c, FILE *stream);
static FILE mystdout = FDEV_SETUP_STREAM( uart_putchar, NULL, _FDEV_SETUP_WRITE );
int uart_putchar( char c, FILE *stream )
{
  if( c == '\n' )
  uart_putchar( '\r', stream );
 
  loop_until_bit_is_set( UCSR0A, UDRE0 );
  UDR0 = c;
  return 0;
}


void USART_Init( unsigned int ubrr )
{
  UBRR0H = (unsigned char)(ubrr>>8);
  UBRR0L = (unsigned char)ubrr;

  UCSR0B = (1<<TXEN1);
   
  UCSR0C = (0<<USBS0)|(1<<UCSZ01)|(1<<UCSZ00);
}


void adc_init(void)
{
  sbi(ADCSRA,ADEN);
  cbi(ADCSRA,ADFR);
  ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADFR)|(1<<ADIF)|(1<<ADIE)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);
  cbi(ADMUX,ADLAR);
}


void messen(int mux)
{
  ADMUX=(0<<REFS1)|(1<<REFS0)|(1<<ADLAR);
  ADMUX|=mux;
}

int main( void )
{
  int adc_result0;
  int adc_result1;
  int adc_result2;

  stdout = &mystdout;

  adc_init();
  USART_Init ( MYUBRR );  //USART initialisieren

  //DDRF = 0x00;
  //PORTF = 0x00;
  while(1)
  {
     sbi(ADCSRA,ADSC);
     
     ADMUX=(ADMUX & 0b01100000);// | 0b01000000);
     adc_result0 = ((ADCL) | ((ADCH)<<8));

     ADMUX=(ADMUX & 0b01100001);// | 0b01000000);
     adc_result1 = ((ADCL) | ((ADCH)<<8));

     ADMUX=(ADMUX & 0b01100010);// | 0b01000000);
     adc_result2 = ((ADCL) | ((ADCH)<<8));

     printf( "%d %d %d\n", adc_result0, adc_result1, adc_result2);
  }
  return 0;
}