18F2520 ADC issue

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  1. - 24th August 2009, 16:11 #11
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    Acetronics2
    Acetronics2 is offline Fanatical Contributor
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    Red face Found something ... BUT ...

    Hi,

    I finally found something ...

    I used AN0 to AN2 ... and AN3 for external reference.

    Innocently ... I had declared AN3 as analog in the ADCON1 register.

    Looking closer to the Datasheet ... The reference DO NOT use the ADC multiplexer path.

    So, I declared AN3 as digital ...

    AND The right AN2 value re-appeared !!!



    BUT that is because I do not use AN's inputs greater than 2 ... I would have to valid AN3 as Analog if using AN4 ...

    So problem is still here.

    I Just found a Turnaround ...

    Alain
    Last edited by Acetronics2; - 24th August 2009 at 16:14.
    ************************************************** ***********************
    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 " !!!
    *****************************************
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