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5.2.2
Device request (PC -> Starter kit)
In this sample program, the data received by the starter kit is called a device request. The
format of data in a device request is standardized. The device requests received by the
starter kit are shown below.
Table 5.2.2-1 Device request (GET_DESCRIPTOR (Device))
Byte
1
Item
bmRequestType
Type of request
Description
80h
Value
(Transfer direction: Device -> host / type: standard/ receive:
device : 80h)
1
2
2
bRequest
wValue
wIndex
Request (GET_DESCRIPTOR: 06h)
Requested descriptor type and index value
(Descriptor type (device): 01h)
0 or language ID
06h
00h
01h
00h
00h
2
wLength
Number of bytes for requested descriptor (YYXXh)
XXh
YYh
Table 5.2.2-2 Device request (SET_ADDRESS)
Byte
1
Item
BmRequestType
Type of request
Description
00h
Value
(Transfer direction: Host -> device/ type: standard/ receive:
device : 00h)
1
2
Brequest
WValue
Request (SET_ADDRESS: 05h)
Device address (address: YYXXh)
05h
XXh
YYh
2
WIndex
0
00h
00h
2
WLength
0
00h
00h
72
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