Instant Interrupts - Revisited

[SteveB]

Darrel

I'm going to be moving a project from a 16F88 to an 18F1320. The reason for the move is the 18F1320 has 3 external interrupts, 2 of which I will be using. Currently I'm using instant interrupts and INT_INT on the 16F88. The question is will instant interrupts work with multiple external interrupts? I see in the datasheet that the external interrupts have numbered flags.

See http://darreltaylor.com/DT_INTS-18/home.html. Darrel has done a good job documenting the Instant Interrupts, and it shows on the right side of the page that multiple external interrupts are implemented.

Steve

[DynamoBen]

Thanks Steve, I forgot that he was using a separate version for the 18Fs.

[f_lez]

Its now 7:34 am, I just read this thread from start to finish, I would like to say it went completely over my head but some must have aimed a bit lower as I now have one hell of an headache........

I read it as I have just got a shiny new programmer and a 18f2550, I was looking for ways to port some old f88 stuff I wrote that used serial comunication, I want to it to use usb...

I found that they are some examples to make the 2550 emulate a serial port, and I may go that way, seems easier to port that way.

Then I read more and got more ambitious, and was wondering if I can port it over with the 2550 running fake serial over usb, but drop a bootloader in it before my old f88 code and use the bootloader over usb, then I wont need to use my pc serial port at all?


To summise, can I re-burn the chip via usb with a boot loader to debug my ported f88 code?

If I can, am I right in thinking all I need is to give up one i/o line to a switch to trigger the bootloader?

And like most things come in three's (especially questions), how to edit/burn to usb? with the f88 I usually create a hex file, quit basic, load the programmer software (winpic/whatever) and burn chip, remove from programmer, get a pin stuck in thumb and lose blood, stick in proto board, bend a pin etc...

[Demon]

Lez, you might want to check the USB forum for that information.

Robert

[f_lez]

Lez, you might want to check the USB forum for that information.

Robert

Either I'm really dumb today (I blame last night) or their is no usb sub forum etc on here!

found a few threads, gave me some stuff to read and I'm about ready to try and knock up a pcb to test the chip with, then i'll have a go with the mouse circle hid to test wiring, then throw in the serial demo and expand on that, thanks.

[Darrel Taylor]

Here's the USB forum
http://www.picbasic.co.uk/forum/forumdisplay.php?f=18

Must have been a Good Night
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