adc

#ifndef F_CPU
#define F_CPU 1000000UL // 16 MHz clock speed
#endif
#define D4 eS_PORTD4
#define D5 eS_PORTD5
#define D6 eS_PORTD6
#define D7 eS_PORTD7
#define RS eS_PORTC6
#define EN eS_PORTC7

#include <avr/io.h>
#include <util/delay.h>
#include "lcd.h" //Can be download from the bottom of this article

int main(void)
{
    DDRD = 0xFF;
    DDRC = 0xFF;
    int i;
    Lcd4_Init();
    while(1)
    {
        Lcd4_Set_Cursor(1,1);
        Lcd4_Write_String("electroSome LCD Hello World");
        for(i=0;i<15;i++)
        {
            _delay_ms(250);
            Lcd4_Shift_Left();
        }
        for(i=0;i<15;i++)
        {
            _delay_ms(250);
            Lcd4_Shift_Right();
        }
        Lcd4_Clear();
        Lcd4_Set_Cursor(2,1);
        Lcd4_Write_Char('e');
        Lcd4_Write_Char('S');
        _delay_ms(1000);
    }


    long long int result_h;
    long long int result_l;
    unsigned char output_l;
    unsigned char output_h;


    DDRB = 0xFF;
    //Configure the ADC module of the ATmega16
    ADMUX = 0b00000011;         //REFS1:0 = 01    -> AVCC as reference
                                //ADLAR   =  0    -> Right adjust
                                //MUX4:0  = 00000 -> ADC0 as input

    ADCSRA = 0b10000100;        //ADEN = 1  : enable
                                //ADSC = 0  :
    while(1)
    {
        ADCSRA |= (1 << ADSC);
        while(ADCSRA & (1 << ADSC)){;}



        output_l = ADCL;
        result_l = ADCL;
        result_h = ADCH;
        output_h = ADCH;

        result_h = result_h << 8;
        result_h = result_h | result_l;

        output_h = output_h << 6;
        output_l = output_l >> 2;

        output_h = output_h | output_l;

        float voltage = (result_h)*4/1024;
        PORTB = ~output_h;

    }
    return 0;
}