Exactly! The timer is free running and every time you have an "event" on your input pin, it stores the current timer value. By comparing it to the time of your last "event" you can extract a lot of useful information. All you have to do is ensure that the time it takes for the timer to overflow is longer then the longest period of the "event" you are capturing otherwise your data will be useless.

 

OK, you're new so you probably don't know here. It's considered a bad idea to resurrect a thread that has been dead for 9 months. That conversation is done. It's ok (and quite preferred) to simply start a new thread even if it's related to an old thread. That way we're not reading archived comments like they're fresh conversation.

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I thought what I'd do was I'd pretend I was one of those deaf-mutes.