Get a USB device for which you will be writing the client driver. In most cases, you are provided with a USB device and its hardware specification. The specification describes device capabilities and the supported vendor commands.
Use the specification to determine the functionality of the USB driver and the related design decisions. It contains the USB FX2 device and all the required hardware specifications to implement a client driver. It contains the following files:. Before you build the driver, you must modify the template INF file with information about your device, specifically the hardware ID string.
On the Details tab, select Hardward Ids under Property. The hardware ID for the device is displayed in the list box. Select and hold or right-click and copy the hardware ID string. Referencing both co-installers in the INF will lead to installation errors. Reflector—If your driver gets loaded successfully, the reflector is loaded as the top-most driver in the kernel-mode stack. The reflector must be the top driver in the kernel mode stack.
For more information, see Building a Driver. To test and debug a driver, you run the debugger on the host computer and the driver on the target computer. So far, you have used Visual Studio on the host computer to build a driver. Next you need to configure a target computer.
To configure a target computer, follow the instructions in Provision a computer for driver deployment and testing. To fully resolve the USB corrupt error, you'll need more than just third-party repair software. The first step is to check the disk and repair its errors. Afterward, use data recovery software to recover any missing or inaccessible data.
There is also an alternative that does not use the command line that is shown below. Step 3. Click cmd. Sign in as Administrator with your account if the program asks for permission.
Step 4. EaseUS CleanGenius is a user-friendly computer fixing tool that is both safe and lightweight. Use this one-click tool to fix the damaged file system easily. Step 1. Step 2. Run the software. Click 'Optimization', and then choose 'File Showing'. Select the drive with a corrupted file system. Tick the 'Check and fix file system error' option and click 'Execute'. Select and hold or right-click and copy the hardware ID string.
For more information, see Building a Driver. To test and debug a driver, you run the debugger on the host computer and the driver on the target computer.
So far, you have used Visual Studio on the host computer to build a driver. Next you need to configure a target computer. To configure a target computer, follow the instructions in Provision a computer for driver deployment and testing.
The template code contains several trace messages TraceEvents that can help you track function calls. All functions in the source code contain trace messages that mark the entry and exit of a routine. For errors, the trace message contains the error code and a meaningful string. Because WPP tracing is enabled for your driver project, the PDB symbol file created during the build process contains trace message formatting instructions. If you configure the host and target computers for WPP tracing, your driver can send trace messages to a file or the debugger.
You can use Tracepdb. The following command creates TMF files for the driver project. The -f option specifies the location and the name of the PDB symbol file.
The -p option specifies the location for the TMF files that are created by Tracepdb. For example, WinUSB is the preferred approach for an electronic weather station that is accessed only by an application that is packaged with the device. It is also useful for diagnostic communication with a device and for flashing firmware. To make it easy for applications to send requests to Winusb.
If the device firmware contains that compatible ID, WinUSB is loaded by default as the function driver for the device. The answer depends on the design of your device. First, determine whether a particular driver model meets your requirements. Some design considerations are based on whether you want the USB device to be accessed by multiple concurrent applications and support data streaming through isochronous endpoints.
Drivers that run in user mode can access only the virtual user address space and pose a much lower risk to the system. Kernel-mode drivers can access the system address space and the internal system structures. A badly coded kernel-mode driver might cause problems that affect other drivers or the system, and eventually crash the computer.
Therefore, a user-mode driver can be safer than a kernel-mode driver in terms of security and stability. Another advantage of user-mode drivers is that they leverage all the Win32 APIs. Those APIs are not available to kernel-mode drivers. Note Windows 8. With UMDF version 2. You cannot use UMDF version 2. KMDF was designed to make the driver models easy to extend to support new types of hardware.
Such drivers are called hybrid drivers in this documentation set. KMDF also supports the port-miniport driver model. Pure WDM drivers are difficult to write, complex, and not robust.
0コメント