connecting analog joystick to gpio

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    baskas
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    Hello all,
    I’ve just completed my little mini upright arcade cabinet using rpi b, 7″ tft taken from old portable dvd player and old original xbox controller for joystick.
    Now my question is, I am using the analog joystick unit from the xbox controller mounted in my mini cab and wanted to interface it with the rpi via the gpio as well as 6 or so buttons.
    The buttons aren’t the issue, its how i can interface the analog joystick to the gpio, is it possible? I have read that i may need an adc chip to do this but only source is online and I am not patient.
    Can retropi see the analog input and somehow use it as a joystick input?

    sorry if its now very clear what i want, just let me know and i’ll endeavor to clarify.

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