On Wed, Jul 14, 2010 at 05:42:52PM +1000, Brendan Jurd wrote: > On 14 July 2010 17:35, Greg KH <gregkh@xxxxxxx> wrote: > > On Wed, Jul 14, 2010 at 04:52:55PM +1000, Brendan Jurd wrote: > >> I am attempting to get data from an Opticon OPN-2001 USB barcode > >> scanner (ID 065a:0009 Optoelectronics Co., Ltd). > > > > Get data means "read", right? > > > >> When I attempt to write anything to /dev/ttyUSB0, I get an ENOEXEC > >> "Exec format error": > > > > Wait, why would you want to write to a barcode scanner? ?They are pretty > > much read-only devices, right? > > > > I don't know about barcode scanners in general, but the OPN-2001 is a > detached handheld unit which scans a bunch of barcodes and keeps them > stored on the device. You then plug in and connect to the scanner, > and issue a serial command to tell it to dump its stored barcodes. > What I'm trying to do here is issue a command to the device by writing > to it, and it should then respond as per its protocol. > > But we're not even getting that far. The write fails miserably with > the (rather curious) ENOEXEC. That's because there is no bulk-out endpoint so the driver does not support writing at all, sorry. In fact, I don't think this driver works well at all right now. I got some reports from Opticon that it needed to be modified for newer devices that supported writing to the device (like yours it seems), and other features. Personally, I don't have the time due to real-life (tm) issues, but if others want to help out, I'd be glad to put you in contact with Opticon to hopefully resolve the issues. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
