Timer auf Null setzen

void Timer2_Configuration(void)

{

    TIM_TimeBaseInitTypeDef TIM_TimeBase_InitStructure;

    TIM_TimeBase_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1;            // CKD - Clock division: TDTS = Tck_tim

    TIM_TimeBase_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;

    TIM_TimeBase_InitStructure.TIM_Period = 279;                            // Theoretisch: 281250Hz / 281 = ~1KHz -> 1ms;   besser TIM_Period=279 (mit Oszi gemessen)

    TIM_TimeBase_InitStructure.TIM_Prescaler = 256;                         // 72MHz / 256 = 281250Hz

    TIM_TimeBaseInit(TIM2, &TIM_TimeBase_InitStructure);

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    NVIC_EnableIRQ(TIM2_IRQn);

    TIM_Cmd(TIM2, DISABLE);

} // Timer2_Configuration

void TIM2_IRQHandler(void)

{

  TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

  Timeout = 0;

} // void TIM2_IRQHandler

void start_timer(void)

{

    Timeout = 1;

    TIM_Cmd(TIM2, ENABLE);                  // Timer starten

}

void stop_timer(void)

{

    Timeout = 1;

    TIM_Cmd(TIM2, DISABLE);                  // Timer stoppen

}