#include <stdint.h>
#include <util/crc16.h>
#include <avr/pgmspace.h>
#include "crc.h"

#define APP_END_ADR 0x1EFFD

static uint16_t calculate_flash_crc()
{

  uint16_t crc = 0xFFFF;
  for (uint32_t i = 0; i <= APP_END_ADR; i++)
  {
    crc = _crc16_update(crc, pgm_read_byte_far(i));  
  }
  return crc;
}

int main(void) {

    //calculate_crc(APP_END_ADR);
    calculate_flash_crc();
}