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  1. #1
    Newbie level 4
    Points: 869, Level: 6

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    How to find USB port speed using visual basic 6.0

    Hai,
    I am working in visual basic 6.0.Using Cypress driver i will communicate with the Device
    using USB Cable. But I have the Problem is wtether I will communicate at High Speed or Full
    Speed.But I want to Communicate in Both Version USB 1.1 to USB 2.0.So Please Help me How to Find
    the Speed of Port.
    Details:
    Cyusb.sys ------> USB Driver
    Visual Basic 6.0---------> Platform(Language)
    Please any one send the code to communicate or Give me guidence to Me.

    Advance thanks

    By
    R.Rajesh Kumar

    •   Alt12th March 2008, 13:12

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  2. #2
    Full Member level 4
    Points: 2,402, Level: 11

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    How to find USB port speed using visual basic 6.0

    The speed is handled at the hardware level, not the software level. The USB system would be unworkable if it allowed programmers to set the connection speed and tried to do things like make a 10M/s connection go 400M/s. I believe that on power up the USB controller can tell the USB devices speed by a voltage level. Each connection speed uses a different resistance to pull a line low and the resulting voltage level tells the controller what the devices speed is, 1, 10 or 400 M/s. If I have the details wrong someone can correct me, but it goes something like that.



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