The body of the while is not the issue.  I have tried with and w/o.  It's
only there to turn off the LED when it enters the loop.



On 9/18/06, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:
>
> Hi,
>
> I am not entirely sure, but don't we face again the read-set-write issue
> again?
>
> //Begin the conversion and block until it's complete
> //while(test_bit(adcon0, 1))
> while(!test_bit(pir1, ADIF))
> {
>     set_bit(gpio, LED_PIN);
> }
>
> Why do you set the pin high each cycle, anyway? First try to remove the
> body
> of the while.
>
> Tamas
>
>
> On 18/09/06, Shawn Wilton <black9@gmail.com> wrote:
> >
> > Well, I have code for both methods.  One for polling and another for
> > checking the interrupt flag.  It would require massive restructuring to
> > use
> > an ISR routine.  I don't want to do that, so I was just testing to see
> if
> > enabling the interrupt and then polling the ADIF flag (which should
> work)
> > *would* work.  It doesn't.  I couldn't get the Go\Not Done bit flip to
> > work,
> > so I threw in some code to see if it would complete with the ADIF flag.
> >
> > Neither seem to allow the conversion to complete.  It just goes in to
> the
> > loop and hangs.
> >
> >
> >
> > On 9/18/06, Michael Rigby-Jones <Michael.Rigby-Jones@bookham.com> wrote:
> >
> > > You are enabling the A/D interrupt, but then you are polling the
> > interrupt
> > > flag which doesn't make sense.  You only enable the interrupt if you
> > want to
> > > handle completed conversions within your interrupt handler. If instead
> > you
> > > are polling the ADIF flag to wait for A/Dconversions then make sure
> you
> > > clear ADIE.
> > >
> > > Regards
> > >
> > > Mike
> > >
> >
> > --
> >
> > Shawn Wilton (b9 Systems)
> > http://b9Systems.com  <- New web page
> > --
> > http://www.piclist.com PIC/SX FAQ & list archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
>
>
>
> --
> unPIC -- The PIC Disassembler
> http://unpic.sourceforge.net
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>



-- 

Shawn Wilton (b9 Systems)
http://b9Systems.com  <- New web page
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