On Sun, May 30, 2010 at 8:38 AM, Xiaofan Chen <xiaofanc@xxxxxxxxx> wrote:
>
> I think this has nothing to do with Wireless USB. I just
> tried it for a simple Logitech Mouse. And same thing happens.
> Then I tried PICKit 2, it has same problem. I think there is
> an issue with the lsusb descriptor parser for the HID device.
>
> And Google has many more such samples.
>
> Bus 003 Device 007: ID 04d8:0033 Microchip Technology, Inc.
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 8
> idVendor 0x04d8 Microchip Technology, Inc.
> idProduct 0x0033
> bcdDevice 0.02
> iManufacturer 1 Microchip Technology Inc.
> iProduct 2 PICkit 2 Microcontroller Programmer
> iSerial 3 pk2new
> bNumConfigurations 2
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 41
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 2 PICkit 2 Microcontroller Programmer
> bmAttributes 0x80
> (Bus Powered)
> MaxPower 100mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 3 Human Interface Device
> bInterfaceSubClass 0 No Subclass
> bInterfaceProtocol 0 None
> iInterface 0
> ** UNRECOGNIZED: 09 21 01 00 00 01 22 1d 00
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 1
The 09 21 thingy is the HID Class Specifif Descriptor.
/* HID Class-Specific Descriptor */
sizeof(USB_HID_DSC), // Size of this descriptor in bytes
--> 09
DSC_HID, // HID descriptor type
--> 0x21
0x0001, // HID Spec Release Number in BCD format
--> 1.00
0x00, // Country Code (0x00 for Not supported)
1, // Number of class descriptors, see usbcfg.h
DSC_RPT, // Report descriptor type
--> 0x 22
sizeof(hid_rpt01), // Size of the report descriptor
--> 0x001d
mcuee@ubuntu64-laptop:~$ uname -a
Linux ubuntu64-laptop 2.6.31-21-generic #59-Ubuntu SMP Wed Mar 24
07:28:27 UTC 2010 x86_64 GNU/Linux
Somehow I believe it used to work.
--
Xiaofan http://mcuee.blogspot.com
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