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上篇《Windows 驱动开发 - 2》我们已经添加了EvtDevicePrepareHardware事件，但是我们还没有增加内容。
对于USB来说主要进行2步操作：
使用方法WdfUsbTargetDeviceCreate来建立USB设备。
NTSTATUS WdfUsbTargetDeviceCreate( [in] WDFDEVICE Device, [in, optional] PWDF_OBJECT_ATTRIBUTES Attributes, [out] WDFUSBDEVICE *UsbDevice );
为了针对USB设备，我们需要建立一个带USBDEVICE成员的结构指针。
typedef struct _DEVICE_CONTEXT {
WDFUSBDEVICE UsbDevice;
WDFUSBINTERFACE UsbInterface;
} DEVICE_CONTEXT, *PDEVICE_CONTEXT;status = WdfUsbTargetDeviceCreate(Device,
WDF_NO_OBJECT_ATTRIBUTES,
&pDeviceContext->UsbDevice);NTSTATUS WdfUsbTargetDeviceSelectConfig( [in] WDFUSBDEVICE UsbDevice, [in, optional] PWDF_OBJECT_ATTRIBUTES PipeAttributes, [in, out] PWDF_USB_DEVICE_SELECT_CONFIG_PARAMS Params );
VOID WDF_USB_DEVICE_SELECT_CONFIG_PARAMS_INIT_SINGLE_INTERFACE( _Out_ PWDF_USB_DEVICE_SELECT_CONFIG_PARAMS Params );
WDF_USB_DEVICE_SELECT_CONFIG_PARAMS_INIT_SINGLE_INTERFACE(&configParams);
status = WdfUsbTargetDeviceSelectConfig(pDeviceContext->UsbDevice,
WDF_NO_OBJECT_ATTRIBUTES,
&configParams);NTSTATUS
EvtDevicePrepareHardware(
IN WDFDEVICE Device,
IN WDFCMRESLIST ResourceList,
IN WDFCMRESLIST ResourceListTranslated
)
{
NTSTATUS status;
PDEVICE_CONTEXT pDeviceContext;
WDF_USB_DEVICE_SELECT_CONFIG_PARAMS configParams;
UNREFERENCED_PARAMETER(ResourceList);
UNREFERENCED_PARAMETER(ResourceListTranslated);
pDeviceContext = GetDeviceContext(Device);
//
// Create the USB device if it is not already created.
//
if (pDeviceContext->UsbDevice == NULL) {
status = WdfUsbTargetDeviceCreate(Device,
WDF_NO_OBJECT_ATTRIBUTES,
&pDeviceContext->UsbDevice);
if (!NT_SUCCESS(status)) {
KdPrint(("WdfUsbTargetDeviceCreate failed 0x%x\n", status));
return status;
}
}
WDF_USB_DEVICE_SELECT_CONFIG_PARAMS_INIT_SINGLE_INTERFACE(&configParams);
status = WdfUsbTargetDeviceSelectConfig(pDeviceContext->UsbDevice,
WDF_NO_OBJECT_ATTRIBUTES,
&configParams);
if(!NT_SUCCESS(status)) {
KdPrint(("WdfUsbTargetDeviceSelectConfig failed 0x%x\n", status));
return status;
}
pDeviceContext->UsbInterface =
configParams.Types.SingleInterface.ConfiguredUsbInterface;
return status;
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原文地址：http://blog.csdn.net/xiaobin_hlj80/article/details/45965843
