Potentiometer reading

[Sherbrook]

Hi again
Read 'Selecting the A/D conversion clock' in the datasheet
It says R/C clock source not recommended at frequencies above 1mHz
For 20mHz clock source should be %010 or %110 (2 decimal or 6 decimal) ie
Define ADC_CLOCK 2
or
Define ADC_CLOCK 6

Phil

[tacbanon]

Hi jetpr and Sherbrook, I tried your suggestions but did not work for me...I will try to get another pot today and try it again...thanks for sharing your ideas.

Regards,
tacbanon

[tacbanon]

Hi everyone, I got the code to work but on 10K pot... Thanks for the inputs everyone.
I used the same connections and the codes from forum's input.

DEFINE    OSC 20
' Define ADCIN parameters
DEFINE ADC_BITS 8
DEFINE ADC_CLOCK 3 
DEFINE ADC_SAMPLEUS 50 


adval Var Byte          ' Create adval to store result(slider)


TRISA = %11111111    
ADCON1 = %00000100  
  
mainloop:


   ADCIN 0, adval       ' Read channel 0 to adval
   Serout2 PORTD.2, 84, [$1B,$45]      ' Clear
   Serout2 PORTD.2, 84, [" Slider: ",#adval]'


   Pause 150            ' Wait .15 second
   Goto mainloop        ' Do it forever


   End

regards,
tacbanon