[Libusb-devel] EzUSB 2131 & libusb

[<ste...@ep...>]

Hello,

I'm trying to use a little USB board based on the Ezusb chip with the libusb to
make a low cost free software JTAG interface.

I use the Ezusb driver :
http://ezusb2131.sourceforge.net/

So I load the driver, I load a little program in the 2131 that writes on EP2
what it reads on EP2. Things seems to work fine, program upload works (I have
tested with a little program that blinks ports). The program and the board work
on windows.

But when I'm trying to use usb_claim_interface(..) on a valid handle opened with
usbopen(...) I always get the following error :
could not claim interface 0: Device or resource busy

Does someone has any experience with Ezusb and libusb or have an idea ?
Does someone knows if the Ezusb driver releases the interface after the upload ?

Thanks a lot,

Stephane

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