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FGPA elevator controller

Discussion in 'Electronic Design' started by [email protected], Jun 13, 2005.

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  1. Guest

    Hello dears
    I need to know, how can I build a "FPGA controller" for Elevator?
    I try simulate a microcontroller 89c51 for this porpose but it was so
    wrong way! please help me.
     
  2. Rich Grise

    Rich Grise Guest

    I know doodley-squat about FPGAs, except that it means "Field-programmable
    Gate Array. I know there are big programmable logic chips - if you can
    get one of those with registers, you could build your controller in the
    form of a state machine. :)

    Good Luck!
    Rich
     
  3. Tim Wescott

    Tim Wescott Guest

    Using an FPGA would be exactly the right way to do things if you had an
    elevator that could move from one floor to the next 100-1000
    nanoseconds. Since that implies an elevator that's only moving between
    1/3 and 1/30th the speed of light I suppose it's not totally impossible,
    as long as you don't mind accelerations that can reach between 2 and 200
    trillion times gravity.

    As long as you have an elevator that takes a few seconds between floors
    the sensible way to build an elevator controller out of an FPGA would be
    to trade the FPGA for a tube full of 8051's and start writing code, so
    you were partially on track. From this observation, and the wording of
    the question, this sounds an awful lot like a school project, and the
    end of June is coming up.

    Have you asked your prof?

    I suspect that what you are expected to do is to figure out the logic
    required to make an elevator work, and to implement that logic on an
    FPGA. If I were a prof asking the question that's what I'd be thinking.
     
  4. Don Taylor

    Don Taylor Guest

    I think I remember Knuth in his 3-volume set "The Art of Computer
    Programming" has a detailed algorithm for an optimal elevator.
    My copies are buried here somewhere or I'd provide volume and page.
     
  5. Joerg

    Joerg Guest

    Hello Tim,
    After people get these kinds of unrealistic assignments at college some
    unfortunately end up trying that in real life later.

    I wish they would hand out more down-to-earth assignments like they used
    to in the good old days. Well, at least sometimes they did.

    Regards, Joerg
     
  6. Anno Siegel

    Anno Siegel Guest

    Probably the simulation in _Fundamental Algorithms_, 2.2.5. Elevators
    make a reappearance in _Sorting and Searching_ 5.4.8, but as a model for
    something else, not as the focus of interest.

    Anno
     
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