#include <avr/boot.h>
#include <avr/io.h>

__attribute__ ((section (".bootloader"))) int main(void)
{
PORTC=0x15;
PORTE=0x53;
volatile unsigned long Count=10;
unsigned short page_number;
unsigned char FlashPage[SPM_PAGESIZE];
for (unsigned short i=0; i<SPM_PAGESIZE; i++) {FlashPage[i]=i&255;}

for (page_number=0; page_number<496; page_number++) {
FlashPage[0]=page_number&255;
uint16_t i;
uint32_t page=page_number;
uint8_t *buf=FlashPage;
page*=SPM_PAGESIZE;

// Disable interrupts.

boot_rww_enable ();


boot_page_erase (page);
boot_spm_busy_wait (); // Wait until the memory is erased.

for (i=0; i<SPM_PAGESIZE; i+=2) {
// Set up little-endian word.

uint16_t w = *buf++;
w += (*buf++) << 8;

boot_page_fill (page + i, w);
}

boot_page_write (page); // Store buffer in flash page.
boot_spm_busy_wait(); // Wait until the memory is written.

// Reenable RWW-section again. We need this if we want to jump back
// to the application after bootloading.

boot_rww_enable ();
}
}