Función UfxDeviceCreate (ufxclient.h)
Crea un objeto de dispositivo UFX, registra rutinas de devolución de llamada de eventos y especifica funcionalidades específicas del controlador.
Sintaxis
NTSTATUS UfxDeviceCreate(
WDFDEVICE WdfDevice,
[in] PUFX_DEVICE_CALLBACKS Callbacks,
[in] PUFX_DEVICE_CAPABILITIES Capabilities,
[in, optional] PWDF_OBJECT_ATTRIBUTES Attributes,
[out] UFXDEVICE *UfxDevice
);
Parámetros
WdfDevice
Identificador de un objeto de dispositivo WDF.
[in] Callbacks
Estructura de tipo UFX_DEVICE_CALLBACKS que contiene punteros a rutinas de devolución de llamada proporcionadas por el controlador que se van a asociar con el objeto de dispositivo UFX.
[in] Capabilities
Puntero a una estructura UFX_DEVICE_CAPABILITIES.
[in, optional] Attributes
Puntero a una estructura de WDF_OBJECT_ATTRIBUTES que contiene atributos proporcionados por el controlador para el nuevo objeto. Este parámetro es opcional y puede ser WDF_NO_OBJECT_ATTRIBUTES.
[out] UfxDevice
Puntero a una ubicación que recibe un identificador del nuevo objeto de dispositivo UFX.
Valor devuelto
Si la operación se realiza correctamente, el método devuelve STATUS_SUCCESS u otro valor de estado para el que NT_SUCCESS(status) es igual a TRUE. De lo contrario, devuelve un valor de estado para el que NT_SUCCESS(status) es igual a FALSE.
Observaciones
El controlador cliente debe llamar a WdfDeviceCreate antes de llamar a UfxDeviceCreate. Normalmente, el controlador cliente llama a UfxDeviceCreate desde su rutina de devolución de llamada EvtDriverDeviceAdd.
El siguiente fragmento de código muestra cómo llamar a UfxDeviceCreate.
NTSTATUS
UfxDevice_DeviceCreate (
_In_ WDFDEVICE WdfDevice
)
/*++
Routine Description:
Routine that registers with UFX and creates the UFX device object.
Arguments:
WdfDevice - Wdf object representing the device.
Return Value:
NTSTATUS.
--*/
{
NTSTATUS Status;
PCONTROLLER_CONTEXT ControllerContext;
UFX_DEVICE_CALLBACKS UfxDeviceCallbacks;
UFX_DEVICE_CAPABILITIES UfxDeviceCapabilities;
PUFXDEVICE_CONTEXT UfxDeviceContext;
UFXDEVICE UfxDevice;
WDF_OBJECT_ATTRIBUTES Attributes;
PAGED_CODE();
TraceEntry();
ControllerContext = DeviceGetControllerContext(WdfDevice);
UFX_DEVICE_CAPABILITIES_INIT(&UfxDeviceCapabilities);
UfxDeviceCapabilities.MaxSpeed = UsbSuperSpeed;
UfxDeviceCapabilities.RemoteWakeSignalDelay = REMOTE_WAKEUP_TIMEOUT_INTERVAL_MS;
//
// Set bitmasks that define the IN and OUT endpoint numbers that are available on the controller
//
//
// #### TODO: Set the IN endpoint mask here if not all endpoint addresses are supported ####
//
// For illustration purposes sample will set default control endpoint 0, 1-4, 8
UfxDeviceCapabilities.InEndpointBitmap = 0x011F;
//
// #### TODO: Set the OUT endpoint mask here if not all endpoint addresses are supported ####
//
// For illustration purposes sample will set default control endpoint 0, 2-7
//
UfxDeviceCapabilities.OutEndpointBitmap = 0x00FD;
//
// Set the event callbacks for the ufxdevice
//
UFX_DEVICE_CALLBACKS_INIT(&UfxDeviceCallbacks);
UfxDeviceCallbacks.EvtDeviceHostConnect = UfxDevice_EvtDeviceHostConnect;
UfxDeviceCallbacks.EvtDeviceHostDisconnect = UfxDevice_EvtDeviceHostDisconnect;
UfxDeviceCallbacks.EvtDeviceAddressed = UfxDevice_EvtDeviceAddressed;
UfxDeviceCallbacks.EvtDeviceEndpointAdd = UfxDevice_EvtDeviceEndpointAdd;
UfxDeviceCallbacks.EvtDeviceDefaultEndpointAdd = UfxDevice_EvtDeviceDefaultEndpointAdd;
UfxDeviceCallbacks.EvtDeviceUsbStateChange = UfxDevice_EvtDeviceUsbStateChange;
UfxDeviceCallbacks.EvtDevicePortChange = UfxDevice_EvtDevicePortChange;
UfxDeviceCallbacks.EvtDevicePortDetect = UfxDevice_EvtDevicePortDetect;
UfxDeviceCallbacks.EvtDeviceRemoteWakeupSignal = UfxDevice_EvtDeviceRemoteWakeupSignal;
UfxDeviceCallbacks.EvtDeviceTestModeSet = UfxDevice_EvtDeviceTestModeSet;
UfxDeviceCallbacks.EvtDeviceSuperSpeedPowerFeature = UfxDevice_EvtDeviceSuperSpeedPowerFeature;
// Context associated with UFXDEVICE object
WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&Attributes, UFXDEVICE_CONTEXT);
Attributes.EvtCleanupCallback = UfxDevice_EvtCleanupCallback;
// Create the UFXDEVICE object
Status = UfxDeviceCreate(WdfDevice,
&UfxDeviceCallbacks,
&UfxDeviceCapabilities,
&Attributes,
&UfxDevice);
...
}
Requisitos
Requisito | Valor |
---|---|
cliente mínimo admitido | Windows 10 |
de la plataforma de destino de | Windows |
encabezado de | ufxclient.h |
biblioteca de | ufxstub.lib |
irQL | PASSIVE_LEVEL |