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usb controllability

GURU MOORTHY
Expert 2425 points

Hi,

Can i generate a square wave on usb data lines, without connecting a end device, and read it on oscilloscope.

In other words can I directly control the usb port of PC.

Thanks

Gurumoorthy

  • 0
    TI__Guru* 76130 points

    Hello,
    I don't think that is possible, the USB Host controllers needs to detect a device attached in order to star the communication, unless you can access and modify the USB driver.
    The best option would be connecting a evaluation board with USB interface, for example a USB hub, then you can use a tool that is provided by the USBIF named EHCI SETT to send commands through the USB interface and connect your scope on the USB connector.
    You can download that tool here www.usb.org/developers
    Regards

  • 0 in reply to Elias Villegas M.
    Expert 2425 points
    Hi,
    what i meant exactly was, can i send a custom data or my own data on usb?
    if yes how can i do that?

    Regards