Hi , I am using libhid on Ubuntu to connect to a composit USB device that enumerates as a mass storage as well as HID device. When using the sample code of libhid, the call hid_force_open() fails with the following printout, and return code of 12. Any ideas what could cause this.
Much appreciate your help. regards, --- asad NOTICE: hid_init(): libhid 0.2.15+20060325.0.0 is being initialized. TRACE: hid_init(): initialising USB subsystem... TRACE: hid_init(): scanning for USB busses... TRACE: hid_init(): scanning for USB devices... NOTICE: hid_init(): successfully initialised HID library. TRACE: hid_new_HIDInterface(): creating a new HIDInterface instance... TRACE: hid_force_open(): forcefully opening a device interface according to matching criteria... TRACE: hid_get_usb_handle(): acquiring handle for a USB device... TRACE: hid_find_usb_device(): enumerating USB busses... TRACE: hid_find_usb_device(): enumerating USB devices on bus 004... TRACE: hid_find_usb_device(): inspecting USB device 004/001[0]... TRACE: hid_compare_usb_device(): comparing match specifications to USB device... TRACE: hid_compare_usb_device(): inspecting vendor ID... TRACE: hid_compare_usb_device(): no match on vendor ID. TRACE: hid_compare_usb_device(): inspecting product ID... TRACE: hid_compare_usb_device(): no match on product ID. TRACE: hid_compare_usb_device(): no custom matching function supplied. NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 004/001[0] does not match 0x05dc. TRACE: hid_find_usb_device(): enumerating USB devices on bus 003... TRACE: hid_find_usb_device(): inspecting USB device 003/001[0]... TRACE: hid_compare_usb_device(): comparing match specifications to USB device... TRACE: hid_compare_usb_device(): inspecting vendor ID... TRACE: hid_compare_usb_device(): no match on vendor ID. TRACE: hid_compare_usb_device(): inspecting product ID... TRACE: hid_compare_usb_device(): no match on product ID. TRACE: hid_compare_usb_device(): no custom matching function supplied. NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 003/001[0] does not match 0x05dc. TRACE: hid_find_usb_device(): enumerating USB devices on bus 002... TRACE: hid_find_usb_device(): inspecting USB device 002/003[0]... TRACE: hid_compare_usb_device(): comparing match specifications to USB device... TRACE: hid_compare_usb_device(): inspecting vendor ID... TRACE: hid_compare_usb_device(): no match on vendor ID. TRACE: hid_compare_usb_device(): inspecting product ID... TRACE: hid_compare_usb_device(): no match on product ID. TRACE: hid_compare_usb_device(): no custom matching function supplied. NOTICE: hid_find_usb_device(): vendor 0x046d of USB device 002/003[0] does not match 0x05dc. TRACE: hid_find_usb_device(): inspecting USB device 002/001[0]... TRACE: hid_compare_usb_device(): comparing match specifications to USB device... TRACE: hid_compare_usb_device(): inspecting vendor ID... TRACE: hid_compare_usb_device(): no match on vendor ID. TRACE: hid_compare_usb_device(): inspecting product ID... TRACE: hid_compare_usb_device(): no match on product ID. TRACE: hid_compare_usb_device(): no custom matching function supplied. NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 002/001[0] does not match 0x05dc. TRACE: hid_find_usb_device(): enumerating USB devices on bus 001... TRACE: hid_find_usb_device(): inspecting USB device 001/004[0]... TRACE: hid_compare_usb_device(): comparing match specifications to USB device... TRACE: hid_compare_usb_device(): inspecting vendor ID... TRACE: hid_compare_usb_device(): match on vendor ID: 0x05dc. TRACE: hid_compare_usb_device(): inspecting product ID... TRACE: hid_compare_usb_device(): match on product ID: 0x0802. TRACE: hid_compare_usb_device(): no custom matching function supplied. NOTICE: hid_find_usb_device(): found a matching USB device 001/004[0]. TRACE: hid_force_open(): claiming USB device 001/004[0]. TRACE: hid_os_force_claim(): failed to claim USB device 001/004[0], trying 2 more time(s)... TRACE: hid_os_force_claim(): detaching kernel driver from USB device 001/004[0]... WARNING: hid_os_force_claim(): failed to detach kernel driver from USB device 001/004[0]... WARNING: hid_force_open(): failed to claim USB device 001/004[0]. TRACE: hid_close(): closing USB device 001/004[0]... TRACE: hid_close(): closing handle of USB device 001/004[0]... NOTICE: hid_close(): successfully closed USB device 001/004[0]. TRACE: hid_close(): freeing memory allocated for HID parser... TRACE: hid_close(): resetting HIDInterface... hid_force_open failed with return code 12
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