#include <mega16.h>

#include <delay.h>

// Standard Input/Output functions
#include <stdio.h>


// Timer 0 overflow interrupt service routine
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{
     ADCSR|=0x40;
     #asm("wdr")
}


#define FIRST_ADC_INPUT 0
#define LAST_ADC_INPUT 1
unsigned char adc_data[LAST_ADC_INPUT-FIRST_ADC_INPUT+1];

#define ADC_VREF_TYPE 0x20

// ADC interrupt service routine
// with auto input scanning
interrupt [ADC_INT] void adc_isr(void)
{
static unsigned char input_index=0;
// Read the AD conversion result
//adc_data[input_index]=ADCH>>1;
// Select next ADC input

if(input_index)
{
    adc_data[input_index]=((ADCH>>1) | 0b10000000);
    putchar(adc_data[input_index]);
}
else
{
    adc_data[input_index]=((ADCH>>1) | 0b00000000);
    putchar(adc_data[input_index]);
}

/*if(input_index)
    putchar((ADCH>>1) | 0b10000000);
else
    putchar((ADCH>>1) | 0b00000000);
*/

if (++input_index > (LAST_ADC_INPUT-FIRST_ADC_INPUT))
   input_index=0;
ADMUX=(FIRST_ADC_INPUT | (ADC_VREF_TYPE & 0xff))+input_index;
// Delay needed for the stabilization of the ADC input voltage
delay_us(10);
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;

PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=Out Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=0 State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x80;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 15,625 kHz
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x03;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: 1000,000 kHz
// Mode: CTC top=OCR2
// OC2 output: Toggle on compare match
ASSR=0x00;
TCCR2=0x19;
TCNT2=0x00;
OCR2=0x1B;


// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x01;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 2400
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x19;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 7,813 kHz
// ADC Voltage Reference: AVCC pin
// ADC Auto Trigger Source: Timer0 Overflow
ADMUX=FIRST_ADC_INPUT | (ADC_VREF_TYPE & 0xff);
ADCSRA=0xAF;
SFIOR&=0x1F;
SFIOR|=0x80;

// ADC initialization
// ADC Clock frequency: 57.656 kHz
// ADC Interrupts: On
ADCSR=0x8E;


#asm("wdr")
// Watchdog Timer initialization
// Watchdog Timer Prescaler: OSC/2048k
#pragma optsize-
WDTCR=0x1F;
WDTCR=0x0F;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

// Global enable interrupts
//#asm("cli")
#asm("sei")
#asm("wdr")

while (1)
      {
      // Place your code here

      }
}