PicDude wrote:

> Got a problem here with a PIC application where the lowest (rightmost) digit 
> of a numerical value is "toggling" back and forth between 2 (consecutive) 
> values rapidly -- example it will jump back and forth between 283 and 284 
> rapidly (like 3-4 times a second, which is the update rate on the display).

Neil,

Here's a 2-sample hysteresis filter:

   current_sample = filtered_data();

   if ( (current_sample == last_sample) ||
        (abs(current_sample - displayed_sample) > THRESHOLD))
     displayed_sample = current_sample;

   last_sample = current_sample;

This cuts the flicker rate in half. To reduce it more, you can increase 
the number of required consecutive samples from 2 to N and save the last 
N-1 samples in an array.


Scott
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