[Libusb-win32-devel] intermittent usb_interrupt_write fail

[Craig B. <cra...@gm...>]

Hi all,

I have an app which calls usb_interrupt_write. Half the time it works
fine. The other half it doesn't seem to send the data at all, but
doesn't return any error - it returns the correct number of bytes it
should have written.

Now I wrote the firmware on the device, so there is every chance that
it is buggy, but I thought that if there was a problem transferring
the data over the usb, then libusb should have flagged something. I
know I'm not getting the data on the device because I have debugging
code on the device showing stages of the transaction.

A tough one I know. I just don't know what to try next. Should I try
to debug the libusb driver to see if anything comes up? I have the
WinDDK debugger although I've never used it.

Cheer,
Craig