Johnson-Fan: Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+DFU Device Descriptor !Offset!!Field!!Size!!Value!!Descripton |- | 0 || bLength || 1 |..."

2016-01-08T03:13:49Z

Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+<big><big>DFU Device Descriptor</big></big> !Offset!!Field!!Size!!Value!!Descripton |- | 0 || bLength || 1 |..."

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{| border=1 class="wikitable" style="width: 100%; height: 100px"
|+<big><big>DFU Device Descriptor</big></big>
!Offset!!Field!!Size!!Value!!Descripton
|-
| 0 || bLength || 1 || 12h || Size of this descriptor,in bytes.
|-
| 1 || bDescriptorType || 1 || 01h || DEVICE descriptor type.
|-
| 2 || bcdUSB || 2 || 0100h || USB specification release number in binary coded decimal.
|-
| 4 || bDeviceClass || 1 || 00h || See interface.
|-
| 5 || bDeviceSubClass || 1 || 00h || See interface
|-
| 6 || bDeviceProtocol || 1 || 00h || See interface.
|-
| 7 || bMaxPacketSize0 || 1 || 8,16,32,64 || Maximum packet size for endpoint.
|-
| 8 || idVendor || 2 || ID || Vendor ID. Assigned by the USB-IF.
|-
| 10 || idProduct || 2 || ID || Product ID. Assigned by manufacturer.
|-
| 12 || bcdDevice || 2 || BCD || Device release number in binary coded decimal.
|-
| 14 || iManufacturer || 1 || index || index of string descriptor.
|-
| 15 || iProduct || 1 || index || index of string descriptor.
|-
| 16 || iSerialNumber || 1 || index || index of string descriptor.
|-
| 17 || bNumConfigurations || 1 || 01h || One configuration only for DFU.
|}

{| border=1 class="wikitable" style="width: 100%; height: 100px"
|+<big><big>DFU Interface Descriptor</big></big>
! Offset !! Field !! Size !! Value !! Descripton
|-
| 0 || bLength || 1 || 09h || Size of this descriptor,in bytes.
|-
| 1 || bDescriptorType || 1 || 04h || INTERFACE descriptor type.
|-
| 2 || bInterfaceNumber || 1 || Number || Number of this interface.
|-
| 3 || bAlternateSetting || 1 || 00h || Alternate setting. Must be zero.
|-
| 4 || bNumEndpoints || 1 || 00h || Only the control pipe is used.
|-
| 5 || bInterfaceClass || 1 || FEh || Application Specific Class Code.
|-
| 6 || bInterfaceSubClass || 1 || 01h || Device Firmware Upgrade Code.
|-
| 7 || bInterfaceProtocol || 1 || 01h || Runtime protocol.
|-
| 8 || iInterface || 1 || index || Index of string descriptor for this interface.
|}

{| border=1 class="wikitable" style="width: 100%; height: 100px"
|+<big><big>DFU Functional Descriptor</big></big>
! Offset !! Field !! Size !! Value !! Descripton
|-
| 0 || bLength || 1 || 09h || Size of this descriptor,in bytes.
|-
| 1 || bDescriptorType || 1 || 21h || DFU FUNCTIONAL descriptor type.
|-
| 2 || bmAttributes || 1 || Bit mask || DFU attributes 

Bit 7……4: reserved 

Bit 3: device will perform a bus detach-attach sequence when it receives a DFU_DETACH request. The host must not issue a USB Reset. (bitWillDetach) 

0 = no 

1 = yes 

Bit 2: device is able to communicate via USB afeter Manifestation phase.(bitManifestationTolerant) 

0 = no, must see bus reset 

1 = yes 

Bit1: upload capable(bitCanUpload) 

0 = no 

1 = yes 

Bit0: download capable(bitCanDnload) 

0 = no 

1 = yes 
|-
| 3 || wDetachTimeOut || 2 || Number || Time,in milliseconds, that the device will wait after receipt of the DFU_DETACH request. if this time elapses without a USB reaset, then the device will terminate the Reconfiguration phase and revert back to normal operation . This repreents the maximum time that the device can wait(depending on its timers, etc.).The host may specify a shorter timeout in the DFU_DETACH request.
|-
| 5 || wTransferSize || 2 || Number || Maximum number of bytes that the device can accept per control-write transaction.
|-
| 7 || bcdDFUVersion || 2 || BCD || Numeric expression identifying the version of the DFU Specification release.
|}

{| border=1 class="wikitable" style="width: 100%; height: 100px"
|+<big><big>DFU Mode Interface Descriptor</big></big>
! Offset !! Field !! Size !! Value !! Descripton
|-
| 0 || bLength || 1 || 09h || Size of this descriptor,in bytes.
|-
| 1 || bDescriptorType || 1 || 04h || INTERFACE descriptor type.
|-
| 2 || bInterfaceNumber || 1 || Number || Number of this interface.
|-
| 3 || bAlternateSetting || 1 || 00h || Alternate setting. Must be zero.
|-
| 4 || bNumEndpoints || 1 || 00h || Only the control pipe is used.
|-
| 5 || bInterfaceClass || 1 || FEh || Application Specific Class Code.
|-
| 6 || bInterfaceSubClass || 1 || 01h || Device Firmware Upgrade Code.
|-
| 7 || bInterfaceProtocol || 1 || 02h || DFU mode protocol.
|-
| 8 || iInterface || 1 || index || Index of string descriptor for this interface.
|}

Using USB-DFU Protocol - Revision history

Johnson-Fan: Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+DFU Device Descriptor !Offset!!Field!!Size!!Value!!Descripton |- | 0 || bLength || 1 |..."