Johnson-Fan: Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+DFU Functional Descriptor ! Offset !! Field !! Size !! Value !! Descripton |- | 0 || bLength || 1 || 09h ||..."

2016-01-07T04:22:32Z

Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+DFU Functional Descriptor ! Offset !! Field !! Size !! Value !! Descripton |- | 0 || bLength || 1 || 09h ||..."

New page

{| border=1 class="wikitable" style="width: 100%; height: 100px"
|+DFU Functional Descriptor
! 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.
|}

DFU Functional Descriptor - Revision history

Johnson-Fan: Created page with "{| border=1 class="wikitable" style="width: 100%; height: 100px" |+DFU Functional Descriptor ! Offset !! Field !! Size !! Value !! Descripton |- | 0 || bLength || 1 || 09h ||..."