Windows Driver Development-3

"Windows Driver Development-2" We have added the Evtdevicepreparehardware event, but we haven't added anything yet.

For USB, the main 2-step operation:

1. Setting up a USB target

Use the method wdfusbtargetdevicecreate to set up the USB device.

NTSTATUS wdfusbtargetdevicecreate (  [in]           wdfdevice              Device,  [in, optional] pwdf_object_attributes Attributes,  [out]          wdfusbdevice           *usbdevice);

(1) Context

To target a USB device, we need to create a struct pointer with a Usbdevice member.

typedef struct _DEVICE_CONTEXT {  wdfusbdevice      usbdevice;  Wdfusbinterface   Usbinterface;} Device_context, *pdevice_context;

(2) Create USB

Status = Wdfusbtargetdevicecreate (Device,                                    wdf_no_object_attributes,                                    &pdevicecontext->usbdevice);

2. Configure he uses the Wdfusbtargetdeviceselectconfig method to configure the USB device.

NTSTATUS Wdfusbtargetdeviceselectconfig (  [in]           wdfusbdevice                         usbdevice,  [in, optional] pwdf_object_ ATTRIBUTES               pipeattributes,  [in, out]      pwdf_usb_device_select_config_params PARAMS);

(1) Initializing USB configuration using Wdf_usb_device_select_config_params_init_single_interface

VOID wdf_usb_device_select_config_params_init_single_interface (  _out_ pwdf_usb_device_select_config_params Params);

Initializes the address of the WDF_USB_DEVICE_SELECT_CONFIG_PARAMS structure variable.

Wdf_usb_device_select_config_params_init_single_interface (&configparams);

(2) Complete the configuration

Status = Wdfusbtargetdeviceselectconfig (Pdevicecontext->usbdevice,                                        wdf_no_object_attributes,                                        & Configparams);

Attached: Code (Evtdevicepreparehardware event)

Ntstatusevtdevicepreparehardware (in Wdfdevice Device, in Wdfcmreslist resourcelist, in Wdfcmreslist ResourceL    isttranslated) {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;}

Windows Driver Development-3