Re: [Libusb-win32-devel] Problems with usb_set_configuration

[Dan E. <Dan...@ne...>]

John Eigelaar wrote:
>=20
> I then downloaded the libusb binary driver (not the filter driver)
> and used that to start my USB application. I am using the free
> Borland BCC 5.5.1 compiler. The code compiles and runs. =20
>=20
> Upon detecting my device I issue a usb_set_configuration() to select
> configuration 1. Then I claim interface 1 which is the data interface
> for my CDC implementation. =20
>=20
> The SET_CONFIGURATION command is never sent to my device. This means
> that the device always stays in the address stat and never goes into
> the configured state. =20
>=20
> What am I doing wrong here ?

Presumably you've identified your device by checking the VID and PID
returned after scanning the bus and they are as expected?

Have you checked for an error return from usb_set_configuration?

How do you know SET_CONFIGURATION isn't sent? Did you snoop the traffic
on the PC, use an analyzer, or have some output from your device?

Dan.