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Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This topic describes how to update a removable or in-chassis device's firmware using the Windows Update WU service.
To do this, you'll provide an update mechanism, implemented as a device driver, that includes the firmware payload. If your device uses a vendor-supplied driver, you have the option of adding the firmware update logic and payload to your existing function driver, or providing a separate firmware update driver package. If your device uses a Microsoft-supplied driver, you must provide a separate firmware update driver package.
In both cases, the firmware update driver package must be universal. For more info about universal drivers, see Getting Started with Windows Drivers. Because WU cannot execute software, the firmware update driver must hand the firmware to Plug and Play PnP for installation. The existing function driver can implement the firmware update mechanism, as shown in the following diagram:. Alternatively, if you want to update the function driver and the firmware update driver separately, create a second device node, on which you will install the firmware update driver.
The following diagram shows how one device can have two separate device nodes:. In this case, the function and firmware device nodes must have different hardware IDs in order to be targeted independently.
There are a couple ways to create a second device node. Certain device types have the ability to expose a second device node on one physical device, such as USB. You can use this functionality to create a device node targetable by WU, and install a firmware update driver on it. Many device types, however, do not allow a single physical device to enumerate more than one device node.
In this case, use an extension INF that specifies the AddComponent directive to create a device node that can be targeted by Windows Update and install the firmware update driver on it.
The following snippet from an INF file shows how you can do this:. When installed, this INF creates the following device hierarchy:. To update firmware for devices that use a Microsoft-supplied driver, you need to create a second device node, as shown above.
PnP resolves this location when it installs the device. The driver can then open this registry key to determine the location of the payload. To locate another device node, the firmware driver should walk the device tree relative to itself, not by enumerating all device nodes for a match. A user may have plugged in multiple instances of the device, and the firmware driver should only update the device with which it is associated. Typically, the device node to be located is the parent or sibling of the device node on which the firmware driver is installed.
For example, in the diagram above with two device nodes, the firmware update driver can look for a sibling device to find the function driver.
In the diagram immediately above, the firmware driver can look for the parent device to find the primary device with which it needs to communicate. The driver should be robust to multiple instances of the device being on the system, possibly with multiple different firmware versions.
For example, there may be one instance of the device that has been connected and updated several times; a brand new device may then be plugged in which is several firmware versions old. This means that state such as current version must be stored against the device, and not in a global location.
If there is an existing method to update the firmware EXE or co-installer, for example , you can largely reuse the update code within a UMDF driver. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Table of contents Exit focus mode.
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Windows arduino firmware firmware for windows firmware for windows Licensed driver for HP Officejet Pro printers The HP Officejet Pro Printer Driver will be required when this printer is installed for the first time or when defective software needs to be replaced Certain device types have the ability to expose a second device node on one physical device, such as USB. You can use this functionality to create a device node targetable by WU, and install a firmware update driver on it. Many device types, however, do not allow a single physical device to enumerate more than one device node.
In this case, use an extension INF that specifies the AddComponent directive to create a device node that can be targeted by Windows Update and install the firmware update driver on it. The following snippet from an INF file shows how you can do this:. When installed, this INF creates the following device hierarchy:.
To update firmware for devices that use a Microsoft-supplied driver, you need to create a second device node, as shown above. PnP resolves this location when it installs the device. The driver can then open this registry key to determine the location of the payload.
To locate another device node, the firmware driver should walk the device tree relative to itself, not by enumerating all device nodes for a match. A user may have plugged in multiple instances of the device, and the firmware driver should only update the device with which it is associated. Typically, the device node to be located is the parent or sibling of the device node on which the firmware driver is installed. For example, in the diagram above with two device nodes, the firmware update driver can look for a sibling device to find the function driver.
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