Setting Up Adc Ports

[peterdeco1]

If I may put my 2 cents in here, I use A/D converters all the time. However, I don't "set up" anything except tell the device to turn all A/D ports to digital on boot. On 12F675 I use ANSEL = 0. On 16C72A, 16F72 and 16F818, I use ADCON1 = 7. Then, I simply use the ADCIN command and it works every time for a 0-255 reading. ADCIN 0, X will read ANA0 and put value into BYTE variable X. And if Anyone here knows why I shouldn't do it this way, please let me know. Thank you. - Peter

[GEEZER]

Thanks for the input guys. Peter, I am glad it is working out so easily for you.

I have it running now. I just ignored ADCON0 and set ADCON1 and 2. I think I know what i did to turn on 4 of the ports i need right now. We'll see how smart i am when i need to turn on the next 4.

Thanks again, I get a lot of help and good ideas from the forum.

The Geezer

[rhino]

if Anyone here knows why I shouldn't do it this way, please let me know. Thank you. - Peter

More than one way to skin a cat. Sure the ADCIN command can be used and probably work just fine, and get him up and going quickly. I like using the ADC registers directly to understand what's all involved. Which from Geezer's post, I was under the impression he was after this as well. Other people also do this for speed and efficiency. Instead of telling someone to RTFM... I try to point them in the direction of examples and where to look in the manual to learn what they are after. Just a personal preference. Glad you got your project going Geezer... and hopefully you have a better understanding of the ADC module.