if you are directly using libusb, call usb_set_configuration() :)
http://libusb.sourceforge.net/doc/function.usbsetconfiguration.html
if you are using sanei_usb, then this has generally been done for you already.
allan
On 7/11/07, Ren? Kjellerup webmaster at keenan.dk wrote:
Hi' every one.
This mail is primarily directed to those
of you who's writing USB applications.
My question meight seem simple, however
the solution does elude me.
In my log file it takes my scanner 80ms to
select the configuration
Quote from log:
[5 ms]URB 4 going down
-- URB_FUNCTION_SELECT_CONFIGURATION:
ConfigurationDescriptor = 0x812d7c78 (configure)
ConfigurationDescriptor : bLength = 9
ConfigurationDescriptor : bDescriptorType = 0x0002
ConfigurationDescriptor : wTotalLength= 0x0027
ConfigurationDescriptor : bNumInterfaces = 0x0001
ConfigurationDescriptor : bConfigurationValue = 0x0001
ConfigurationDescriptor : iConfiguration = 0x
ConfigurationDescriptor : bmAttributes= 0x00c0
ConfigurationDescriptor : MaxPower= 0x
ConfigurationHandle = 0x
Interface[0]: Length= 76
Interface[0]: InterfaceNumber = 0
Interface[0]: AlternateSetting = 0
[85 ms] UsbSnoop - MyInternalIOCTLCompletion(ad282db0) : fido=,
Irp=814469a0, Context=821c7208, IRQL=0
[85 ms]URB 4 coming back
End quote.
Well that's what my log says, my question is:
How in the world do I make a program call
to do this?
That is, is there some API to make the
URB_FUNCTION_SELECT_CONFIGURATION call to the
USB device (my scanner in this case), or does
libusb do this when getting the device?
Kind regards
Ren? Kjellerup
-- as life grows older, I gain experience.
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