Solved - ELAPSED TIMER: TimerConst not defined

[Demon]

Attachment 9731

It's either something totally obvious, or painfully obscure.

I can see the future! It turns out it's a combination of totally obvious and painfully obscure. It was looking at me right in the face.


I added in Elapsed_INT.bas and it compiled without TimerConst errors.

  If OSC == 32
TimerConst = 0FFB7h
  EndIF

[Ioannis]

Great! Just confirm it counts correctly now.

Ioannis

[Demon]

It compiles, but now I have to find the correct value.

I'm now on Art's thread trying to find that out:

https://www.picbasic.co.uk/forum/sho...020#post156020


EDIT: Darrel talks about the Prescaler and adding NOPs here:

https://www.picbasic.co.uk/forum/sho...9649#post69649

And that's about where my eyes start glossing over. I had also read a comment (somewhere) about Darrel using a prescaler of 2 for 64MHz, so I'm pretty sure I'm on the right track.


EDIT SOME MORE: For future me when I'm looking for the same answer, Prescaler is controlled in T1CON.

[Demon]

Ok, I couldn't figure out how to incorporate Prescaler in Art's formula, so I took another route:

- used Preload from 16MHz
- set Prescaler to 1:2

Counter on LCD worked as expected.

https://www.picbasic.co.uk/forum/sho...025#post156025

[Demon]

Art's formula with Prescaler:

65535 - (((( MHz / Prescaler ) / 4 ) x 10000 ) - 8 )