Trigger an event to power down USB port(s)

[chipzoller]

Do any of you gurus know of a way to have an event that will power down either all or better yet a certain USB port? And another press of the button will power-up that same port or ports. I have a device I wish to power down upon a button press.

thanks,


Chip

[slavka012]

You can disable the device in the OS (unload drivers etc), but it is not possible to power down a USB device.

Regards, Slava

[chipzoller]

This device is nothing more than a USB light and therefore has no drivers or anything the OS recognizes (other than a circuit).

Is it not possible to powerdown the port then?

[miked]

If you can find a program on the web that will do this, then you can have Girder execute it as appropriate.

Another idea is to hook up the LED's to a serial port -- I believe that Marsupial has done this. The serial port is more easily controlled than USB ports. See http://www.girder.nl/phpBB2/viewtopic.php?t=6097

Finally, the Rube Goldberg approach is to wire in a relay in the power-line of a usb cable, and then use Girder to control the relay (via the serial port). I did this with an IR emitter:

http://www.girder.nl/phpBB2/viewtopic.php?t=6073

[slavka012]

Is it not possible to powerdown the port then?

Nope.