// Encoder mode init
TIM_TimeBaseStructure.TIM_Period = 0x6;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
TIM_SetCounter(TIM3, 0x3);
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM3, ENABLE);
NVIC_EnableIRQ(TIM3_IRQn);


void TIM3_IRQHandler()
{
    if (TIM3->CR1 & TIM_CR1_DIR)
        ENC.RotDir = ENC_Rot_Down;
    else
        ENC.RotDir = ENC_Rot_Up;
    ENC.NewRotEvent = 1;

   TIM_SetCounter(TIM3, 0x3);
   TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
}