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WDF_USB_BMREQUEST_DIRECTION enumeration

[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  = BMREQUEST_HOST_TO_DEVICE,
  BmRequestDeviceToHost  = BMREQUEST_DEVICE_TO_HOST
} WDF_USB_BMREQUEST_DIRECTION;

Constants

BmRequestHostToDevice

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

Minimum KMDF version

1.0

Minimum UMDF version

2.0

Header

Wdfusb.h (include Wdfusb.h)

See also

WDF_USB_CONTROL_SETUP_PACKET

 

 

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