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WDF_USB_BMREQUEST_DIRECTION enumeration (wdfusb.h)

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[Applies to KMDF and UMDF]

The WDF_USB_BMREQUEST_DIRECTION enumeration identifies the data transfer direction for a USB control transfer.

Syntax

typedef enum _WDF_USB_BMREQUEST_DIRECTION {
  BmRequestHostToDevice = 0,
  BmRequestDeviceToHost
} WDF_USB_BMREQUEST_DIRECTION;

Constants

 
BmRequestHostToDevice
Value: 0
The data transfer direction is from the host system to the device.
BmRequestDeviceToHost
The data transfer direction is from the device to the host system.

Remarks

The WDF_USB_BMREQUEST_DIRECTION enumeration is used in the WDF_USB_CONTROL_SETUP_PACKET structure.

For more information about the data transfer direction for a USB control transfer, see the USB specification.

Requirements

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

See also

WDF_USB_CONTROL_SETUP_PACKET