{ TraceEvents(TRACE_LEVEL_ERROR, TRACE_DEVICE,"%!FUNC! Failed to create USB target device %!hresult!", hr);gotoExit; } m_FxUsbDevice = usbDevice; Exit: DriverSafeRelease(usbDevice); DriverSafeRelease(usbFactory); TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DEVICE,"%!FUNC! Exit");re...
下面的代码示例演示客户端驱动程序的 EvtDriverDeviceAdd 事件回调实现。 C++复制 NTSTATUSMyUSBDriver_EvtDeviceAdd( _In_ WDFDRIVER Driver, _Inout_ PWDFDEVICE_INIT DeviceInit ){ NTSTATUS status; UNREFERENCED_PARAMETER(Driver); PAGED_CODE(); TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER,"%!FUNC!...
USB设备驱动程序使用ID table来支持热插拔。usb_driver结构中包含的指针变量id_table指向usb_device_id类型的结构数组,该结构数组声明USB设备驱动程序支持的设备。大多数驱动程序使用USB_DEVICE()宏来创建usb_device_id结构。这些结构通过使用MODULE_DEVICE_TABLE(usb, xxx)宏注册到USB核心。类中包含的以下代码行/linux...
if (!is_usb_device_driver(drv))return 0; return 1; } else { //否则就是USB驱动或者USB设备的接口struct usb_interface *intf;struct usb_driver *usb_drv;const struct usb_device_id *id; if (is_usb_device_driver(drv))//如果是USB驱动,就不需要匹配,直接returnreturn 0; ...
structdevice_driver driver; unsignedintno_dynamic_id:1; }; 实现一个 USB设备的驱动主要是实现 probe()和 disconnect()函数接口。 probe()函数在插入 USB设备的时候被调用,disconnect()函数在拔出 USB设备的时候被调用。 USB请求块 USB请求块(USB request block,urb)的功能类似于网络设备中的 sk_buff,用于描...
Endpoint information for the specific struct usb_device that this urb is to be sent to. This variable must be initialized by the USB driver before the urb can be sent to the USB core. To set fields of this structure, the driver uses the following functions as appropriate, depending on the...
USBD_VERSION_INFORMATION structure (usb.h) Microsoft Learn Challenge Nov 23, 2024 – Jan 10, 2025 Register now Dismiss alert Learn Sign in Windows Hardware Developer Explore Downloads Windows Driver Kit samples Troubleshooting Resources Dashboard...
function is set to URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE (see_URB_CONTROL_DESCRIPTOR_REQUEST) and the type of descriptor is set to USB_CONFIGURATION_DESCRIPTOR_TYPE. By using the information contained in the URB, the USB driver stack builds a standard control request and sends it to the ...
每个USBD_INTERFACE_INFORMATION结构的Pipes成员指向一个USBD_PIPE_INFORMATION结构数组,其中包含与该特定接口的每个终结点关联的管道信息。 客户端驱动程序可以从Pipes[i].PipeHandle中获取管道句柄,并使用它们向特定管道发送 I/O 请求。Pipes[i].PipeType成员指定了该管道支持的终结点和传输类型。