Timeline for Why doesn't this debounce function work?

6 events

when toggle format	what		by	license	comment
Jan 14, 2016 at 16:51	comment	added	gbulmer		@Jasen - Yes, that would be better. C++ classes are a bit verbose (I like to write Go) but a simple class would do, or a struct if there were several buttons to handle.
Jan 14, 2016 at 9:27	comment	added	Jasen		@gbulmer or use `static` variables private to `debounce()`
Jan 14, 2016 at 2:34	comment	added	Dave Tweed		No, it isn't entirely pointless, because you can use it as an additional local variable inside the function. You can think of it as the caller initializing that variable for you, but then you can update it as needed while the function executes.
Jan 14, 2016 at 2:18	comment	added	Dallin		Thank you for your answer @Dave, I think I'm starting to understand. But quick question, what do you mean by "an assignment to a function parameter does NOT update the corresponding variable in the callers environment"? Does this mean assigning a variable to a function parameter is pointless?
Jan 13, 2016 at 23:06	comment	added	gbulmer		Beat me to it! +1 for "It worked perfectly" is probably an overstatement. Yes, you saw the LED change when you pressed the button, but that doesn't mean it was getting debounced.. A quick (possible) fix is to remove the parameters to `debounce()` and keep the state in global variables. A bit messy, but more useful than broken.
Jan 13, 2016 at 22:58	history	answered	Dave Tweed	CC BY-SA 3.0