여기저기 찾아 봤는데.. 코드비전에서는 잘되던 통신이 AVR Studio에서는 되지 않아
고생하다 겨우 되는것을 확인한 소스입니다.

저와 같이 고생하신분 혹여있지 않을까 싶어 글을 올립니다.

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/delay.h>

#define F_CPU           16000000   크리스털이 16M일 경우*/
#define UART_BAUD_RATE    9600      /* 9600 baud */
#define UART_BAUD_SELECT (F_CPU/(UART_BAUD_RATE*16l)-1)

#define outp(A,B) B=A
#define inp(A) A
typedef unsigned char  u08;
typedef          char  s08;
typedef unsigned short u16;
typedef          short s16;
/* uart globals */
static u08 *uart_data_ptr;
static u08 uart_counter;
SIGNAL(SIG_UART_TRANS)     
/* signal handler for uart txd ready interrupt */
{
    uart_data_ptr++;

    if (--uart_counter)
        outp(*uart_data_ptr, UDR0);       /* write byte to data buffer */
}
SIGNAL(SIG_UART_RECV)     
/* signal handler for receive complete interrupt */
{
    register char led;

    led = inp(UDR0);        /* read byte for UART data buffer */
    outp(led, PORTD);     /* output received byte to PortB (LEDs) */
}

void Byte_Send(unsigned char byData)
{
 while(!(UCSR0A & (1<<UDRE)));
 UDR0=byData;
}

void uart_send(char *pStr)
/* send buffer <buf> to uart */
{  
 while(*pStr)
 {
  Byte_Send(*pStr);
  *(pStr++);
 }
}
void uart_init(void)
/* initialize uart */
{
 DDRE = 0xFE;
 UBRR0H = 0; UBRR0L = 103;
 UCSR0A = 0;
 UCSR0B = 0x18;
    UCSR1C = 0x06;
}
int main(void)
{
    outp(0xff ,DDRD);      /* PortB output */
    outp(0x00, PORTD);     /* switch LEDs on */

    uart_init();
    sei();                 /* enable interrupts */
    uart_send("Serial test##\n");\
       
}