I used a previous example from help from a member for my ADC conversion based on sampling the ADC inputs from 0 to 3.3VDC from the wiper arm of a pot.

I'd like to add some software hysteresis to account for some system noise. The sampling routine works great as it is, is there an easy way to do some math function....

Typically all hysteresis I've ever done was in the hardware not the software, I did some searching on 8052, I read the dead zone vs hysteresis thread, but nothing sticks for makes sense for my application

Here is my sample program that is working as I like:

for (index = 0; index<NUM_SAMPLES; index++) //Sample ADC for current pot position value
	{value += AD1DAT2;} 
	level = value/NUM_SAMPLES;

I figured sampling would be good enough, but doesn't account for the noise spikes I'm seeing on the input from the crappy power supply in which i can not modify or change.

Anything simple to implement based on this function or easy direction?

Thanks