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Joystick/switch interface to computer serial port

  • US 5,134,395 A
  • Filed: 08/10/1990
  • Issued: 07/28/1992
  • Est. Priority Date: 08/10/1990
  • Status: Expired due to Term
First Claim
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1. An interface circuit for use between a control point including at least one joystick and at least one switch, said interface connected between said control point and a computer of the type having a serial bipolar data input, said interface comprising:

  • a microcontroller including a plurality of input circuits and an output circuit;

    an analog to digital converter including at least one input circuit connected directly to at least one joystick and a plurality of output circuits connected to a portion of the input circuits of said microcontroller;

    at least one switch including a circuit connection directly to said microcontroller;

    and a pulse converter connected between the output of said microcontroller and said computer input whereby digital signals representative of a switch closure or for representations of analog positions of said joystick are converted to digital signals by said analog to digital converter and said converted signals input to said microcontroller are reformatted in serial digital form for application to said pulse converter, said pulse converter converting said serial digital signals to bipolar values appropiate for transmission to said computer.

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