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interrupt of the timer

Question asked by chechio.cesare on Jun 30, 2014
Latest reply on Jun 30, 2014 by Clive One
Can I have a link or an code example to count the rising edges that have an input signal in a prefixed time?

I need the number of rising edges in a second.
The frequency of the signal on a gpio input is in a range from 10 Hz to 70Hz.

how count the number of rising edges until the timer is 0?

I use stm32f4 discovery.