ASAHI KASEI
[AK4571]
5.7.
HID 関連リクエスト
Get Descriptor(HID/Report)
5.7.1.
Offset
Field
Size
Value
Description
0
1
2
BmRequestType
BRequest
wValue
1
1
2
0x81
0x06
0x2100
0x2200
GET_DESCRIPTOR
HID Descriptor
Report Descriptor
4
6
wIndex
wLength
2
2
0x0003
0xZZZZ
Interface Number (#3)
Descriptor Length (ZZZZ is assigned by host)
が
wValue HID Descriptor
の場合は、
を返します。
HID Descriptor
wValueがReport Descriptorの場合、下記情報(Report Descriptor:31バイト)を返します。
Report Descriptor
備考
Usage Page (Consumer)
Usage (Consumer Control)
Collection (Application)
Logical Minimum (0)
Logical Maximum (1)
Usage (Volume Increment)
Usage (Volume Decrement)
Report Size (1)
0x05, 0x0c
0x09, 0x01
0xA1, 0x01
0x15, 0x00
0x25, 0x01
0x09, 0xE9
0x09, 0xEA
0x75, 0x01
Data Length(1 bit)
Report Count (2)
Input (Data, Variable, Absolute, No_Wrap, No_Preferred)
0x95, 0x02
0x81, 0x2A
Number of Data(INC, DEC: two)
Usage (Mute)
Report Count (1)
Input (Data, Variable, Relative, No_Wrap, No_Preferred)
0x09, 0xE2
0x95, 0x01
0x81, 0x2E
Report Count (5)
Input (Constant)
0x95, 0x05
0x81, 0x01
End Collection
0xC0
MS0153-J-02
2003/3
- 49 -