Read ADC data from ATMega8535 and transfer it using Serial

#include <mega8535.h>
#include <stdio.h>
#include <delay.h>
#define mode_ADC 0x20
const long int osilator=4000000;
unsigned long int UBRR;
unsigned char dataadc;

//prototype function
unsigned char baca_adc (unsigned char pin_adc)
{
  ADMUX=pin_adc |mode_ADC;
  ADCSRA|=0x40;
  while ((ADCSRA & 0x10)==0);
  ADCSRA|=0x10;
  return ADCH;
}
void InisialisasiUART( unsigned long int baud_rate );
void tampilan (void);
void ngurusinADC (void);
void main ( void )
{
  DDRC=0xFF;
  PORTC=0x00;              
  ngurusinADC();
  InisialisasiUART(9600);
  while (1)
  {
  tampilan();     
  dataadc=baca_adc (1);
  delay_ms(1000);
  };
}
void ngurusinADC (void)
{
 //Inisialisasi ADC
  DDRC=0xFF;
  ADMUX=mode_ADC;
  ADCSRA=0x86;   
}
void InisialisasiUART ( unsigned long int baud_rate )
{
  UBRR = (osilator/(16*baud_rate))-1;
  UBRRL = UBRR;
  UBRRH = UBRR>>8;
  UCSRA = 0x00;
  UCSRB = 0x18;
  UCSRC = 0x86;
}
void tampilan (void)
{
  putchar(dataadc);
}

 putchar(dataadc);

puts(dataadc);

;Compiler   : CodevisionAVR V2.04.4a
;CHIP        : AVR ATMega16 @4Mhz
;Prog. Exp  : ADC UART example..
-------

*/

#include <mega16.h>

// Standard Input/Output functions
#include <delay.h>     //library fungsi delay
#include <stdio.h>     //I/O funtion

#define ADC_VREF_TYPE 0x40  //AVCC reference

// Global variables
const long int osilator=4000000;
unsigned long int UBRR;

//function prototype
void sett_regs(void);
void SetBaudrate( unsigned long int baud_rate );


// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input){
ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
// Delay needed for the stabilization of the ADC input voltage
delay_us(10);
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

//Main routine buat super loop
void main(void){
sett_regs();  
SetBaudrate(9600);   
for(;;){ 
    #asm("nop")
    //utilize printf function from stdio.h. sometimes will needs CRLF to monitor the data in terminal software
    //CRLF has the function to make a new line with every packet sent
    //printf("Data ADC = %d%c%c", read_adc(0),13,10); //printf dengan carriage return and linefeed (13,10)  CRLF
    //printf("Data ADC = %d\r\n", read_adc(0));       //printf dengan carriage return and linefeed (13,10)  CRLF
    printf("Data ADC = %d", read_adc(0)); //printf tanpa carriage return and linefeed (13,10)  CRLF  
    //carriage return dan linefeed terpisah :)
    putchar(13);  //carriage return
    putchar(10);  //linefeed
    delay_ms(500); //delay for packet, time interval                                         
    }
}

// Setting register
void sett_regs(void){
//Define I/O 
DDRA  = 0x00;PORTA = 0x00;
DDRB  = 0x00;PORTB = 0x00;
DDRC  = 0x00;PORTC = 0x00;
DDRD  = 0xF0;PORTD = 0xF0;
// ADC initialization
// ADC Clock frequency: 31,250 kHz
// ADC Voltage Reference: AVCC pin
// ADC Auto Trigger Source: Free Running
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0xA7;
SFIOR&=0x1F;
}                    

void SetBaudrate( unsigned long int baud_rate ){
UBRR = (osilator/(16*baud_rate))-1;
UBRRL = UBRR;
UBRRH = UBRR>>8;
UCSRA = 0x00;
UCSRB = 0x18;
UCSRC = 0x86;
}