/*
CodeWizardAVR V1.24.6 Professional
Chip type           : ATmega16
Program type        : Application
Clock frequency     : 8,000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*/

#include <mega16.h>
#include <stdio.h>

#asm
    .equ __lcd_port=0x18 ;PORTB
#endasm
#include <lcd.h>

#define ADC_VREF_TYPE 0x00

unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input|ADC_VREF_TYPE;
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}
char lcd_buffer[16];
float v;
unsigned int data;
void main(void)
{
   
PORTA=0x00;
DDRA=0x00;

PORTB=0x00;
DDRB=0x00;

PORTC=0xff;
DDRC=0xff;

PORTD=0x00;
DDRD=0x00;

TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

MCUCR=0x00;
MCUCSR=0x00;

TIMSK=0x00;

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

// ADC initialization
// ADC Clock frequency: 125,000 kHz
// ADC Voltage Reference: AREF pin
// ADC Auto Trigger Source: None
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x86;

// LCD module initialization
lcd_init(16);

while (1)
       {
       // Place your code here
       data=read_adc(0);
       v=(data)*(5/1024);
       lcd_clear();
         lcd_gotoxy(0,0);
         sprintf(lcd_buffer, "V=%i", v);
         lcd_puts(lcd_buffer);
         lcd_read_byte(16);
       };
}

sprintf(lcd_buffer, "V=%.2f", v);