WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS function (wdfusb.h)

Artikel
02/22/2024

[Applies to KMDF and UMDF]

The WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS function initializes a WDF_USB_CONTROL_SETUP_PACKET structure for a USB control transfer that obtains device status.

Syntax

void WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS(
  [out] PWDF_USB_CONTROL_SETUP_PACKET Packet,
  [in]  WDF_USB_BMREQUEST_RECIPIENT   BmRequestRecipient,
  [in]  USHORT                        Index
);

Parameters

[out] Packet

A pointer to a WDF_USB_CONTROL_SETUP_PACKET structure.

[in] BmRequestRecipient

A WDF_USB_BMREQUEST_RECIPIENT-typed value that is stored in the Packet.bm.Request.Recipient member of the WDF_USB_CONTROL_SETUP_PACKET structure.

[in] Index

A status index value that is stored in the Packet.wIndex.Value member of the WDF_USB_CONTROL_SETUP_PACKET structure.

Return value

None

Remarks

The WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS function does the following:

Zeros the WDF_USB_CONTROL_SETUP_PACKET structure.
Sets the Packet.bm.Request.Type member to BmRequestStandard.
Sets the Packet.bm.Request.Dir member to BmRequestDeviceToHost.
Sets the Packet.bRequest member to a "get status" request value.
Sets the Packet.wValue.Value member to zero.
Sets the Packet->Packet.wIndex.Value member to the Index argument.

To initialize a WDF_USB_CONTROL_SETUP_PACKET structure, the driver should call one of the following functions:

WDF_USB_CONTROL_SETUP_PACKET_INIT
WDF_USB_CONTROL_SETUP_PACKET_INIT_CLASS
WDF_USB_CONTROL_SETUP_PACKET_INIT_FEATURE
WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS
WDF_USB_CONTROL_SETUP_PACKET_INIT_VENDOR

Examples

The following code example initializes a WDF_USB_CONTROL_SETUP_PACKET structure.

WDF_USB_CONTROL_SETUP_PACKET  packet;

WDF_USB_CONTROL_SETUP_PACKET_INIT_GET_STATUS(
                                             &packet,
                                             BmRequestToDevice,
                                             0
                                             );

Requirements

Requirement	Value
Target Platform	Universal
Minimum KMDF version	1.0
Minimum UMDF version	2.0
Header	wdfusb.h (include Wdfusb.h)

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