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  1. - 17th June 2010, 18:51 #1
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    Hi,

    Not surprising ...

    IF you use external Vref + and Vref - ... ... A2 and A3 are the Vref+/- inputs ...

    IF NOT just try
    Code:
    ADCON1 = %01001110 ; ADCON1 is 8 Bits... not 7 !!!
    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  2. - 17th June 2010, 20:13 #2
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    Using ADCON1 = %01001110 corrects my digital input problem, but now PortA.0 does not work as an analog input for ADC. Where can I find some more information on how ADCON1 works?
  3. - 17th June 2010, 20:29 #3
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    Quote Originally Posted by Armadus View Post
    Using ADCON1 = %01001110 corrects my digital input problem, but now PortA.0 does not work as an analog input for ADC. Where can I find some more information on how ADCON1 works?
    Ok, I see ...

    You can try to open the 18F242 datasheet, ADC section ( $ 17 , I think )

    you also could post the code you've written here, I'm sure it will save lots of time to you ...

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  4. - 17th June 2010, 22:28 #4
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    Thanks for your help. I must have misread the table that I was looking at. The correct setting
    is ADCON1 = %10001110.
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