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USB defines class code information that is used to identify a device's functionality and to nominally load a device driver based on that functionality.
2023/10/3 -Device Class (bDeviceClass): This specifies the overall category of the USB device, such as a mass storage device or a human interface device.
2024/11/18 -Note the bDeviceClass, bDeviceSubClass, and bDeviceProtocol values. Those values indicate that the device contains one or more USB interface ...
These codes are qualified by the value of the bDeviceClass and bDeviceSubClass fields. If a device supports class-specific protocols on a device basis as ...
2024/1/17 -Manufacturers of composite devices typically assign a value of zero to the device class (bDeviceClass), subclass (bDeviceSubClass), and ...
In the context of a device descriptor, this bDeviceClass value indicates that each interface specifies its own class information and all interfaces operate ...
2019/11/23 -Device are mainly identified using a pair of hexadecimal numbers, like 04b3:3108. The 4 first hexadecimal digits are the Vendor ID (04b3 = IBM).
Typically only the bDeviceClass is set at the device level. Most class specifications choose to identify itself at the interface level and as a result set the ...
2011/5/23 -bDeviceClass. bDeviceSubClass. bDeviceProtocol. This is highlighted at the top of the screenshot in figure 1. Many device classes can be ...
bDeviceClass. USB-IF class code for the device. uint8_t, bDeviceSubClass. USB-IF subclass code for the device, qualified by the bDeviceClass value. uint8_t ...