Code:

#define BAUD_RATE   9600

  #include <avr/interrupt.h>   
#include <avr/io.h>
#include <avr/wdt.h>
#include "usbdrv/usbdrv.h"
#include "usbdrv/oddebug.h"
#include "usbdrv/uart.h"
#include <util/delay.h>
#include <stdio.h>
#include <stdlib.h>
 

static void avr_init(void);
void uart_init(void);

int uart_getch(FILE *stream);
int uart_putch(char ch, FILE *stream);
char * b;
void uart_gets( char* Buffer, uint8_t MaxLen );

uchar usbFunctionSetup(uchar data[8])
{

   
   return USB_NO_MSG;
}
int i;
uchar usbFunctionWrite(uchar *data, uchar len)
{
   

  printf("not work this founction");// not work
scanf("%d",&b);//not work



for (i=0;i<=5;i++)   
data[i]=b[i];

return 6;
}

uchar usbFunctionRead(uchar *data, uchar len)
{

   


 scanf("%d",&b);//not work
   
for (i=0;i<=5;i++)   
data[i]=b[i];

return 6;
}

int main(void)
{
    avr_init();
   
   
    for(;;)
    {
wdt_reset();
       usbPoll();
scanf("%d",&b);//not work

   
    
    }
   
    return(0);
}



static void avr_init(void)
{
wdt_enable(WDTO_1S);
    usbDeviceDisconnect();
      
int j=0;
   


   

   uart_init();

 
 

 FILE uart_str = FDEV_SETUP_STREAM(uart_putch, uart_getch, _FDEV_SETUP_RW); 
 stdout = stdin = &uart_str;
   

  DDRB|=_BV(0);
  printf("hamed");//it is working
 

     
_delay_ms(300);

   usbDeviceConnect();
   usbInit();
   odDebugInit();
      sei();
    return;
}

 
void uart_init(void)
{
  UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8;      // set baud rate
  UBRRL = (((F_CPU/BAUD_RATE)/16)-1);

 
  UCSRB = (1<<RXEN)|(1<<TXEN);


  UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
}

int uart_putch(char ch, FILE *stream)
{
   if (ch == '\n')
    uart_putch('\r', stream);

   while (!(UCSRA & (1<<UDRE)));
   UDR=ch;

   return 0;
}

int uart_getch(FILE *stream)
{
   unsigned char ch;

   while (!(UCSRA & (1<<RXC)));
   ch=UDR; 

   
   uart_putch(ch,stream);     

   return ch;
}