#pragma optimize= none
volatile void WatchDog_on(void)
{
WDTCSR=(1<<WDCE)|(1<<WDE);
WDTCSR=(1<<WDE)|(1<<WDP2)|(1<<WDP1);
}

#pragma optimize= none
//no_code_motion no_inline
void WDT_off(void)
{
__disable_interrupt();
__watchdog_reset();
/* Clear WDRF in MCUSR */
MCUSR &= ~(1<<WDRF);
/* Write logical one to WDCE and WDE */
/* Keep old prescaler setting to prevent unintentional time-out */
WDTCSR |= (1<<WDCE) | (1<<WDE);
/* Turn off WDT */
WDTCSR = 0x00;
__enable_interrupt();
}