/* This function handles EXTI Lines 10 to 15 interrupts requests.  */
void EXTI0_IRQHandler(void)
/* This function handles EXTI Lines 10 to 15 interrupts requests.  */
void EXTI0_IRQHandler(void)
{ 
  if(EXTI_GetITStatus(USER_BUTTON_EXTI_LINE) != RESET)
  {
    EXTI_ClearITPendingBit(USER_BUTTON_EXTI_LINE);
    UserButtonStatus = 0x01;
  }
}