// #pragma optimize = none // можно без этого.
void Watchdog_CMD( Ewd_modes in_mode ) {
 register unsigned char uc_tmp1, uc_tmp2;
 register unsigned char uc_sreg = SREG;
 __disable_interrupt();
 __watchdog_reset();

 uc_tmp2 = ( WDTCR  | (1 << WDE) );
 uc_tmp1 = (uc_tmp2 | (1 << WDCE));
 uc_tmp2 = ((uc_tmp2 & (~(WD_PERIOD_bm))) | (unsigned char)(in_mode));
 if( in_mode == WD_DISABLE_bm )   {
    MCUCSR &= (~(1 << WDRF));
    uc_tmp2 = 0;
  }/*if*/
 WDTCR = uc_tmp1;
 WDTCR = uc_tmp2;
 SREG = uc_sreg; // Restore interrupts state...
}