On Sun, 30 Jan 2005, Antonio Vinci wrote: > Hi all, > I'm new in this list and i'm approaching libusb programming. > Trying to write a sane backend for my scanner, i do the following steps: > > open the device with scanner = usb_open(dev); > set the device configuration with usb_set_configuration(scanner, 1); > claim the device with usb_claim_interface(scanner, 0); > > when i try to send any data to the device: > usb_bulk_write(scanner, 81, cmd, length, 1000) > returns -22 (Invalid argument). > > I'm wondering what is the "Invalid argument" referred to?
Should the 81 really be 0x81? Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
