TIM2

    RCC  -> APB1ENR |= 0x00000001;  //TIM2 enabled
    TIM2 -> CR1 &= 0xFFFE;                  //TIM2 counter disable
      
    TIM2 -> PSC = 0x0;                      //Prescaler = 0 (no division)
    TIM2 -> ARR = 0xFFFFFFFF;               //Autoreload

    TIM2 -> CR1 &= 0xFFEF;                  //Up Counting
    TIM2 -> CR1 &= 0xFCFF;                  //tDTS = tCK_INT
    
    TIM2 -> CCMR1 &= 0xFFFFFFFD;            //CC1 channel is configured as input, IC1 is mapped on TI1
    TIM2 -> CCMR1 |= 0x00000001;
    
    TIM2 -> CCER  &= 0xFFF5;                //Circuit is sensitive to TIxFP1 rising edge
    TIM2 -> CCER  |= 0x0001;                //Capture enabled
    
    TIM2 -> SMCR &= 0xFFFEFFDF;             //Filtered Timer Input 1 (TI1FP1)
    TIM2 -> SMCR |= 0x00000057;             //External Clock Mode 1
    
    TIM2 -> CR1  |= 0x0001;                 //TIM2 counter enable

    while (true) 
    {
          printf("%d\r\n", TIM2 -> CNT);
    }