16F88 bootlader with Internal OSC

[HenrikOlsson]

Thanks a lot Darrel,
I'll give it a go first thing in the morning, concidering your track record I feel confident ;-) I'll let you know ASAP though.

I guess you changed the Goto bootloader adress to actually jump past the bootloader, setting OSCCON and then back to the bootloader? Or do I need to worry about overwriting those 'certain locations'?

Never used meProg but I did spend a couple of hours today looking for dissassemblers and stuff, found a few, some I couldn't get to work at all, and some showed me an asm listing but no way to save it without coughing up money (fair enough I guess).

And of course, OSCCON should be set to $60 and not $68, don't know why I was trying to set a read-only bit.....

Again, thanks alot!
/Henrik.

[Darrel Taylor]

I guess you changed the Goto bootloader adress to actually jump past the bootloader, setting OSCCON and then back to the bootloader? Or do I need to worry about overwriting those 'certain locations'?

Yes, there's a small area just past the bootloader that didn't appear to be used, and I only put about 5 words in there. So it won't affect the amount of code you would normally be able to use.

My only fear is if that area is used by the bootloader, it may only work once. I don't think it will overwrite it, but I can't test it here to be sure.

Fingers crossed.

And of course, OSCCON should be set to $60 and not $68, don't know why I was trying to set a read-only bit.....

Since you can't write to that bit ... a 1 is just as valid as a 0.

[HenrikOlsson]

Hi Darrel,
Your bootloader file seems to be working perfectly! I've only downloaded a few very short test-programs but so far but it seems to work just fine.

Now off to get a 100Hz timer interrupt going, with DT-Ints of course ;-)

Thank you!
/Henrik.

[Darrel Taylor]

Great. sometimes a gamble pays off.

Now off to get a 100Hz timer interrupt going, with DT-Ints of course ;-)

Of course.

Using the Timer Template ?
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[HenrikOlsson]

Hi Darrel,
Yes, using the timer template I was able to get it going in a matter of minutes - awsome piece of work that Instant Interrupt system!

A bit OT: I've also started playing a bit with this Ladder compiler for PIC's, pretty cool and the hex-files it produces leaves the first four bytes of program memory empty so I can program the chip with MCLoader, sweet.

/Henrik.

[Darrel Taylor]

Hmmm, was it a Freudian slip.
Funny how the thread was spelled ... and it ends up you're using a Ladder program.

Back when I was working with PLC's I never really liked dealing with Ladder Logic.
That program you pointed to brought back some Scary memories.

But thanks for pointing it out, because I'm really interested in the SolveSpace program on the same website.

That'll suck up a few hundred hours of my time.
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[HenrikOlsson]

Hi Darrel,
Yeah, I noticed I had mis-spelled the thread title, I hate it when that happens and I can't seem to figure out how to go back and edit it.

I'm not very comfortable with ladder programming myself but I think it has its place. I did look at the solve space video on the site, pretty cool, please don't disappear from here ;-)

/Henrik.