Analog port newbie questions

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  1. - 8th March 2008, 11:50 #1
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    rngd
    rngd is offline Junior Member
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    Default Analog port newbie questions

    Hi guys,

    Im having trouble using the analog port. Regarding the analog port A, is it supposed to output high (approx 4.8V) when its not connected to anything ? I have set trisa=%111111.

    Ive programmed everything else correctly (I think), after reading some good guides on programming for port A.

    The problem is I have a photodiode which has open circuit voltage of 0.25V but when I connect it to channel 0 it jumps to 0.40V for some reason. The Vref+ is set to 2.5V.

    Thanks all.

    edit: I suspect that something is wrong with my port A. How do i check ? Anyone have a working test code ? Im also testing it now ..
    Last edited by rngd; - 8th March 2008 at 12:15.
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