UM0463

The USB state machine of the control endpoint

11/30

Table 6.

Bitmap of flag field in sUSB_vSetup

3.3

Standard requests

Most of the requests specified in Table 9-3 of the USB specification [1] are treated as

standard requests in the library. Table 7 lists all the standard requests and their valid

parameters in the library. Requests that are not in the table below are considered as

nonstandard requests.

D7

D6

D5

D4

D3

D2

D1

D0

Set if high byte of wValue is not zero

Set if low byte of wValue is not zero

Set if high byte of wIndex is not zero

Set if low byte of wIndex is not zero

Set if high byte of wLength is not zero

Set if low byte of wLength is not zero

Set if wLength is 1 (one)

Set if wLength is 2 (two)

Table 7.

Standard requests

State

bmRequest

Type

Low

byte of

wValue

High

byte of

wValue

Low

byte of

wIndex

High

byte of

wIndex

wLength

Comments

GET_STATUS

A, C

80

00

00

00

00

2

Get Status of the

Device.

C81

00

00

N

00

2

Get Status of Interface,

N is the valid interface

number.

A, C

82

00

00

00

00

2

Get Status of Endpoint

0 OUT direction.

A, C

82

00

00

80

00

2

Get Status of Endpoint

0 IN direction.

C82

00

00

EP

00

2

Get Status of Endpoint

EP.