Instant Interrupts - Revisited

[Ioannis]

Why do you care so much about Enable/Disable flags? All these are taken care by Darrel in his routines, so normally you don't have to deal with them.

Just do as his examples show and you are OK.

In the extreme case you want some control as to when the interrupts are re-enabled, just use the @INT_ENABLE or @INT_DISABLE commands locally.

Also the simplistic debouncing of a button with time delay is not very elegant and is not recommended as it can delay the program execution.

Ioannis

[WOZZY-2010]

Ioannis,

Why do you care so much about Enable/Disable flags? All these are taken care by Darrel in his routines, so normally you don't have to deal with them.

I'm really just trying to fully understand this particular interrupt. It's a good learning exercise for me before I go on to other interrupts. I am learning that Darrel's routines are actually much easier to use and sensible than I thought, before I thoroughly confused myself by looking at it in this much detail.

Also the simplistic debouncing of a button with time delay is not very elegant and is not recommended as it can delay the program execution.

As I'm really pretty new to this, I'd be very interested to know what is your recommendation for debouncing. Are you talking about a hardware, or a software solution?

For my current application, the interrupt is just used to jump out of the main program to enter a set up menu. So the main program is on hold and nothing is time critical. This whole RBC_INT study is just a tangent that I went off on, when I didn't understand why the stuff that I had cut & paste from the examples didn't behave as I expected.

Thanks again,
Bob W.

[Ioannis]

Well, the idea is to use the interrupts, both with Port Interrupt on Change and Timer.

On the first interrupt from your button, you start the timer. If you have multiple interrupts from the same button and the timer stil runs, just drop them.

If the timer interrupt occurs, and the button is still pressed, then you can confirm that is really pressed, setting a flag.

Hope this helps a little.

Ioannis