Weird issue with Lab X1

[Demon]

Yeah, I looked at the generated files and opened up LST, very interesting.

I noticed it was already picking up P16F877.INC.

Then it picked up PBPPIC14.LIB.

And then further down it tried to open the include I provided. So it seems as if everything is in there now. Except it uses this for the switches:

__config _XT_OSC & _WDT_ON & _PWRTE_ON & _LVP_OFF & _CP_OFF

And I'm wondering if this is what I have to set properly, and how.


EDIT: And yes, I am pointing to MPASM in MicroCode Studio Plus.

[mackrackit]

Yup, fuse are very important

You can modify the *.inc file or set them in code.
http://www.picbasic.co.uk/forum/showthread.php?t=543

[Demon]

That's what I'm trying to do, thanks.

I don't like changing the include, in case I have different needs in another program.

So I tried this:

@ __config _CP_OFF & _DEBUG_OFF & _WRT_ENABLE_ON & _CPD_ON & _LVP_ON & _BODEN_ON & _PWRTE_ON & _WDT_ON & _XT_OSC


But it's doing the same thing, the speed goes crazy when I reconnect.

Not sure if I set the switches properly though.

EDIT: I list all switches, that way I can easily see what is available without going back to datasheet, even if I use default values.

[mackrackit]

Might want to turn LVP off, I do not think you are using it.

I keep going back to hat fancy OSC thing. The 877 is pretty straight forward. Has to be the OSC acting up to cause a change in speed. Power cycling causing a clitch? And somehow the programmer is resetting it?

[Demon]

LVP OFF is the first thing I tried, no diffference.

[Demon]

I unplug the USB cable to the programmer or disconnect the programmer completely from the Lab X1, touch the oscillator and the timing returns to normal speed!

Ok, so what can be the causes of something like this? This goes into capacitance stuff and that's over my head.

[mackrackit]

Being I just learned about that OSC and have not pulled the data sheet I do not know.

But...

I will make an assumption that this board was in storage since you say you have been out of this for awhile. Look for loose/broken connections and corrosion/tin whiskers.

Maybe put it under a heat lamp for a bit.