Hi All, I found out that my HID device hasn't got a report descriptor. As in the report descriptor is empty. Will I not be able to use libhid because of this? I am pretty sure hid_force_open gives me a "device is not an HID device because it has no report descriptors. Am I correct?
What can i do? Thanks! Ankita ---------- Forwarded message ---------- From: ankita prasad <[EMAIL PROTECTED]> Date: Sep 11, 2007 4:46 PM Subject: Error 13 on running test_libhid To: [email protected] Hi, I plug in my HID device and lsusb -vvv gives me this: Bus 001 Device 019: ID 0694:0003 Lego Group Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x0694 NI idProduct 0x0003 bcdDevice 0.11 iManufacturer 0 iProduct 2 NIUSB Hub V0.11 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 34 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xa0 Remote Wakeup MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Devices bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.10 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 37 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 10 Here you will notice this: Report Descriptors: ** UNAVAILABLE ** After this i run test_libhid and i get a return code of 13, which is -"the device is not an HID device". Attached is the output of test_libhid. Why do i get this error when clearly the device gets enumerated as an HID device initially. Is it because it has no report descriptors? What am I doing wrong? Any help would be greatly appreciated! Thanks! Ankita WARNING: hid_prepare_hid_descriptor(): failed to get HID descriptor for USB device 001/011[0]:error sending control message: Broken pipe _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
