AN36 button state

RE: AN36 button state

Ole Morten — Fri, 22 Nov 2013 11:52:29 GMT

I'm not sure I understand what you mean. The original question talks about the button_event_handler, which has not been mentioned anywhere before section 4.4.5. The service code itself makes no assumptions about anything, it just sends whatever value it got in.

As I note in my answer, you're correct that the application code makes an assumption, which as far as I can see is explained where the assumption is actually made in the document.

In case either you or someone else stumbling upon this wanted different behavior, I thought it would be useful to include a quick note on how that could be achieved.

RE: AN36 button state

michurin — Wed, 20 Nov 2013 15:44:30 GMT

"If you want to modify this to toggle at each edge of the button..." No, I don't. I did underscore the word assumption which is the root of my question and because I didn't get to app_button() this discussion has to wait until that time. Thank you.

RE: AN36 button state

michurin — Wed, 20 Nov 2013 15:41:19 GMT

Didn't get to this(4.4.5) point yet...

RE: AN36 button state

michurin — Wed, 20 Nov 2013 15:40:01 GMT

Referring to the section 4.4.5 in the section 4.3.5 would be helpful

RE: AN36 button state

Ole Morten — Wed, 20 Nov 2013 14:27:10 GMT

You're correct that this will just toggle the state on every button press. This was a simplification that was done since app_button doesn't give you an event on both edges of a press in the current SDK versions. It's also noted in the text, right at the start of section 4.4.5: "To finish the application, you need to define how to handle button presses. Use the app_button module that is part of the SDK for this. This module will give a callback each time the button is pressed, essentially making the characteristic toggle its state for each press."

If you want to modify this to toggle at each edge of the button press, the easiest way is to use app_gpiote instead of app_button, but this was deemed too much extra complexity for the application note, compared to the benefit it gives.