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Interface system for use with microprocessor based control systems and method therefor

  • US 5,440,325 A
  • Filed: 12/22/1994
  • Issued: 08/08/1995
  • Est. Priority Date: 12/06/1993
  • Status: Expired due to Fees
First Claim
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1. A system for interfacing with a microprocessor based control system that presents at least one of a plurality of options for selection on a display comprising, in combination:

  • first rotatable dial means for providing at least one of a first plurality of inputs to said microprocessor controlled display;

    second rotatable dial means coupled to said first rotatable dial means for providing at least one of a second plurality of inputs to said microprocessor controlled display;

    display means coupled to both said first rotatable dial means and to said second rotatable dial means for displaying one of said options defined by the combination of at least one of said first plurality of inputs and at least one of said second plurality of inputs;

    single selection means coupled to both said first rotatable dial means and to said second rotatable dial means for selecting any one of said options after preselecting a position for said first rotatable dial means and said second rotatable dial means;

    dial function transformation means comprising at least one of said options for changing said first rotatable dial means to an X direction dial and for changing said second rotatable dial means to a Y direction dial for moving a pointer on said display means to another option displayed on said display means for selection by said single selection means;

    rejection means coupled to both said first rotatable dial means an to said second rotatable dial means for rejecting said option;

    said first rotatable dial means being coupled to a first rotary encoded shaft means for providing said first plurality of inputs and said second rotatable dial means being coupled to a second rotary encoded shaft means for providing said second plurality of inputs;

    said first rotary encoded shaft means being coupled to a first quadrature decoder circuit means for determining the direction of rotation of a shaft of said first rotary encoded shaft means and said second rotary encoded shaft means being coupled to a second quadrature decoder circuit means for determining the direction of rotation of a shaft of said second rotary encoded shaft means;

    said first quadrature decoder circuit means being coupled to a first binary counter circuit means for counting said first plurality of inputs and said second quadrature decoder circuit means being coupled to a second binary counter circuit means for counting said second plurality of inputs;

    said first binary counter circuit means, said second binary counter circuit means, said single selection means, and said rejection means being coupled to a latch bank means for transferring data from each of said first binary counter circuit means, said second binary counter circuit means, said single selection means, and said rejection means via a microprocessor interface to said microprocessor, said microprocessor delivering data to a display driver means for driving said display means; and

    printer means coupled to said microprocessor for providing hard copy output.

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