Record, storage and compare analog signals

[Ioannis]

Lets then suppose you have the analog input at AN0.

ADCON0=%00000001    ' Channel 0, ADC on
ADCON1=%00001110    ' AN0 as analog,rest as digital
ADCON2=%10010101    ' Right justify result and Fosc/16

analog_res_array    VAR WORD[40]
counter             VAR BYTE
start_array         VAR BYTE     ' first element of the array to store samples
stop_array          VAR BYTE     ' last element of the array to store samples

start_array=0:stop_array=19      ' first group of 20 samples
gosub adc_routine
start_array=20:stop_array=39     ' second group of 20 samples
gosub adc_routine

......

adc_routine:
    for counter=start_array to stop_array
        high adcon0.1
        while adcon0.1:wend
        analog_res_array[counter]=adresh*256+adresl
    next counter
return

Now in the array you have 40 samples (two groups of 20) and you can compare them.

Note that code is untested, but you get the idea.

Ioannis