Message

Reply | Reply all

Date Prev | Date Next | Thread Prev | Thread Next Date Index | Thread Index

From: Areeb Ali <Areeb@c...>
Date: Mon, 10 Nov 2003 22:46:08 -0800 (PST)
Subject: [usb] need basic information of report descriptor

hi 
i just go through USB 2.0  and USB 1.1 specifications and unable to solve my problem ..i want to know what these value means & is it neccessary to mention transaction type (IN or OUT) in report descriptor if yes then how. An report Descriptor is written below i would be very grateful if some one guide me what speicifications are written in these items or what these values and fields represents.
* Report Descriptor
Rep_Desc:
       db  $06,$00,$FF          ; Usage Page (vendor defined)
       db  $09,$01              ; Usage (vendor defined)

       db  $A1,$01              ; Collection (Application)
       db  $09,$02              ; Usage (vendor defined)

; Input report
       db  $09,$03              ; Usage (vendor defined)
       db  $15,$00              ; Logical Minimum ($00)
       db  $26,$FF,$00          ; Logical Maximum ($FF)
       db  $75,$08              ; Report Size (8 bits)
       db  $95,$08              ; Report Count (1 field)
       db  $81,$02              ; Input (Data, Variable, Absolute)

       db  $C0                  ; End Collection
RDesc_End:

_____________________________________________________________
Win Rs. 10,000 - Participate in online games and quizes
at http://www.safgames2003.com