Jason Wambach wrote:

> An interrupt approach ulimately solved my problem, which is something I
> wouldn't have readily considered as a solution, so many thanks for that
> advice.  I am still a little confused as to why the interrupt approach
> worked as opposed to a modifed polling type approach simmilar to what I
> tried first.  No matter how much time I allowed after switching a/d
> channels, subsequent reads always produced the same values, regardless
> of the inputs changing. 

Your original approach in principle works; the interrupt approach is
nothing different WRT the ADC, only the acquisition time is spent running
other code between interrupts instead of waiting in a delay loop. 

If the original approach didn't work, there was something wrong. Maybe your
loops didn't wait long enough? Did you verify the timing of your loops?

Gerhard
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