/* This function handles External lines 9 to 5 interrupt request.  */
void EXTI9_5_IRQHandler(void)
/* This function handles External lines 9 to 5 interrupt request.  */
void EXTI9_5_IRQHandler(void)
{
  if (EXTI_GetITStatus(KEY_BUTTON_EXTI_LINE) != RESET)
  {
    EXTI_ClearITPendingBit(KEY_BUTTON_EXTI_LINE);
 	  *(__IO uint32_t *) 0x000000FF = 0xFF;
  }
}