Re: [Libusb-win32-devel] disabling usb device

[Stephan M. <ste...@we...>]

Just use usb_set_configuration(dev, 0) to "turn off" the device
after you're done with your testing. This will free the bandwidth
allocated for the device.

Stephan


> Thank you Spiro and Graeme for the answers. Graeme's suggestion won't work for me, I should've explained the problem better. I might have had some luck with Spiro's answer though. I'll check if it'll work. Meanwhile, here goes a better explanation of the problem:
> 
>  
> 
> I'm developing a test program that tests if usb ports are working. I do this by requesting information and writing and reading data from usb devices. I use an usb board test that has four devices. The thing is that these devices are out of usb standarts, requiring more bandwidth than it should. So, when I use a higher number of devices, Windows won't allow me to access from the third device and on. This happens because I don't have enough band.
> 
> If I test one device, and after it's done, I unplug it, then I'm freeing some band, which allows me to test some more ports. If I do this to every device I test, then I'll be able to test how many ports I want.
> 
> But it's not possible for me to be unpluging the devices myself - I need to do this by software. After I test one device, I should use a function (on Windows) that disables the device connection to the host controller, which will free some band.
> 
> 
> I hope this made things clear.
> 
> Cheers,
> 
> Dan.
> 
>  
> 
> On 4/13/07, Spiro Trikaliotis <an-...@sp...> wrote:
> Hello,
> 
> * On Thu, Apr 12, 2007 at 05:57:16PM -0300 Dan Martins wrote:
> 
> > Does anyone know any windows function that allows me to manually
> 
> > "unplug" a usb device?
> 
> Have a look at the Windows DDK (now called "WDK"), the "devcon" sample.
> It allows you to do different operations with devices, for example,
> enable, disable, remove, list them, rescan for them, ...
> 
> 
> HTH,
>   Spiro.
> 
> --
> Spiro R. Trikaliotis                              http://opencbm.sf.net/
> http://www.trikaliotis.net/                     http://www.viceteam.org/
> 
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