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 |
|---|---|
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Minimum UMDF version | 2.0 |
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Header |
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See also
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