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Can A5 read joystick ports?

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  • Can A5 read joystick ports?

    Specifically, is it possible for Alpha5 V4.5 (or v5) to detect the joystick buttons (from the old DB15 style or USB joystick), or even better, can it read the analog joystick values?

    For example, one could connect a thermistor to the joystick port, read the value and have Alpha convert it to the actual temperature. That's right... I want a $2000 thermometer! ;-) Actualy, I have other uses in mind, this was just an example.

    Thanks,
    Bob Emery

  • #2
    RE: Can A5 read joystick ports?

    ssssoooooo... I guess that's a no to the idea of 'real-time data aquisition via native PC hardware and Alpha Five'... *glances in marketing's direction*... hmmm

    Perhaps I'm thinking a bit too far outside of the box. ;-)

    -Bob

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    • #3
      RE: Can A5 read joystick ports?


      Bob, don't know much on this subject. However, others have had good luck connecting barcode readers using serial ports, and some sort of 'wedge' device. If this is similar to what you are thinking of you might search for threads on barcode readers or wedges.

      -- tom

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      • #4
        RE: Can A5 read joystick ports?

        The wedge is not an analog device, it's output from a card or label
        reader is the same as that of a keyboard.

        efs

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        • #5
          RE: Can A5 read joystick ports?


          Thanks. -- tom

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          • #6
            RE: Can A5 read joystick ports?

            Tom, I've been looking at barcode stuff too, and while it is great for data-entry, especially inventory stuff and real-time tracking, it's not what I'm looking for in this case.

            The joystick port present in most PCs basically provides us with at least two analog-to-digital convertors and two digital (on/off) inputs, using low 5 volt signals. The analog inputs can be anywhere from 0 to 5 volts, and somewhere in windows, some driver reads that voltage level as a number from 0 to n, where n is limited by the number of bits in the hardware ADC. For example, a 16 bit ADC would provide 2^16, or 65536 distinct voltage levels, so n could be 0-65535. I'm not sure what the actual hardware or driver is capable of and I don't know how windows handles it. Perhaps a small TSR type program could 'feed' Alpha5 this joystick data?

            If Alpha could read the 'joystick' values, and you use a forms OnTimer event to, for instance, detect a joystick button press, triggering it to record voltage level data from one or both inputs for x amount of time, or until some level is achieved, or whatever... You could then provide some nice graphical test data, not unlike a digital storage oscilloscope.

            Cool idea, no?
            Thanks for the feedback guys,
            Bob Emery

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