16F819 ADC 8bit=127, Not 255?Help!


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  1. #1
    Accelerator's Avatar
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    Thank you very much for all the comments!!!! I do appreciate them! You guys are masters!!

    I have not tried you guys advises yet, I have been busy these couple days. But I will surely try them out once I free up myself!

    To reply the questions #2 from BigWumpus, I connected my PORTA.1~4 to a single digit display through a decoder; and since its just a display, I don't need to read it back. I do like your #3 suggestion though! Thanks a lot!


    Quote Originally Posted by BigWumpus
    1. mistake:
    You defined the variable COUNTER on PARTA. Why ?
    If you read this 8 bits back, they represent the digital attached signals from the pins.
    You should define it as a simple variable (Var byte).

    2....:
    you write to Counter, but never read it back ?

    3....:
    maybe you can throw away the if-thens by using counter=Potenzial*10/256 with some other steps

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    I finally have time to work on my code, and YES! I got it work!!

    There are few things I changed:
    1. For the single digit display, I changed my output from PORTA, to PORTB.0~3. Since then, it displayed numbers from 0-9!!!

    2. For the servo, I changed the PULSOUT signal from potential to potential*2, because, the full motion range 0-255 is for 4MHz, but I'm using 8MHz indeed.

    Thank God!!!

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