參數(shù)資料
型號: IMAGELINK-50-USB20
廠商: Electronic Theatre Controls, Inc.
英文描述: IMAGELINK-50-USB2.0
中文描述: 圖片鏈接- 50 - USB2.0接口
文件頁數(shù): 13/28頁
文件大?。?/td> 641K
代理商: IMAGELINK-50-USB20
I
MAGE
L
INK
-50
PAGE
13
OF
5
DISTEC GMBH
Industriestrasse 1 D-82110
Germering
30.3.2004/sw1
http://www.distec.de
Tel.: +49-89-89 43 63-0
Fax: +49-89-89 43 63-39
SPECIFICATION
3.2.4 SET_ TRANSFER_COUNTER
The SET_TRANSFER_COUNTER is used for initializing an image transfer. After some
conditions which leave the ImageLink in an undefined state it has to be reinitialized with this
request.
Request
bmRequest
Type
1.
Byte
SET_
TRANSFER
_COUNTER
bitmap:
b7
b6
b5
b4
reserved
0
0
0
0
bRequest wValue
wIndex wLength Data
2.
Byte
1.
Byte
return
bitmap
2.
Byte
0xB7
0xC0
0xB7
bitmap 0x00 0x0000 0x0002
b3
reserved
0
b2
set to
stored
default
value (1)
b1
reserved
0
b0
reserved
0
reserved
reserved
reserved
each bit can be set individually or together.
The return bitmap value of “Data” depends on display power state. If there is no switched ON
or no display power good signal the SET_TRANSFER_COUNTER will fail and the return value
is 0x00. Otherwise the return value is 0x01.
return bitmap:
b7
b6
b5
b4
reserved
0
0
0
0
(1) at present there is only a fixed value:
couter_byte_0 = 0x00
couter_byte_1 = 0xc2
couter_byte_2 = 0x01
couter_byte_3 = 0x00
this corresponds with 320x240 = 76800 pixel
b3
reserved
0
b2
reserved
0
b1
reserved
0
b0
0= failure
1= success
reserved
reserved
reserved
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