Understanding timer issues

[Darrel Taylor]

Transmit:
@ INT_DISABLE   INT_INT     ; Disable external ints to stop Echo RX

INT_INT is the same as INT0_INT.
But you are using INT2.

In the BlankGain: handler, you have ...

              CASE IS > 14
                GOTO EndGain                '

That will use PBP's system variables. Which means the handler can not be an ASM type anymore.

A CASE ELSE might fix that problem.

There may be other issues, but that's a start.

[boroko]

Thanks for the observations. The INT_INT was a leftover from a different chip and I didn't catch it there.

I'm afraid the problem still exists. I have been trying to get a pattern so that I can at least identify why the timer seems to be out of control. I'm sure it is going to be something stupid, but last nights session didn't reveal it to me. I'm going to devise a few more tests tonight to try again. Decided to take a break from it and work on other areas for a while for a break.

I will say that my understanding of PBP and PIC's in general has come a long way by working through recent projects. That has only been possible because of all of the help that this forum and it's members. I know that it can be frustrating, but your efforts are very appreciated.

Thanks
Bo

[boroko]

A few more questions on this mystery...

I'm using a 18F1330 and TMR0 is a selectable width timer (8/16bit).
My understanding is that because it has TMR0L and TMR0H, in 8 bit mode, you preload TMR0L only. There is no TMR0 register specifically. Do I have that right? Are there any other issues with "changeable" timers

I know that I have read threads concerning changing timer values on the fly in the program, but at the time, I was not facing those problems and wasn't smart enough to leave a trail to find my way back now that I need the insight. I have tried searching, but I haven't hit the right terms yet. Anybody remember a link to their favorite discussion on changing timer values?

If anything jumps to mind, I would appreciate it. In the mean time, I'll see if I can cajole an answer from some testing.

Thanks, I learn a great deal from you all. (sometimes, what questions NOT to ask!...) ;-)

Bo