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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.

2024/1/17 -Every Universal Serial Bus (USB) device must be able to provide a single device descriptor that contains relevant information about the device.

I'm working on a multi-channel USB audio device (6-mic/2-spkr). I started ... When I set up the device descriptor with 0xEF, 0x02, 0x01 as described in ...

2024/1/17 -USB interface association descriptor (IAD) allows the device to group interfaces that belong to a function.

2023/11/9 -USB defines class code information that is used to identify a device's functionality and to nominally load a device driver based on that ...

2003/7/23 -The recent USB 2.0 ECN Interface Association Descriptor (IAD) solves the problem by defining a standard method in the USB device framework for ...

2020/5/13 -I have just tested the files you linked too, and I can confirm that direct boot from a MBR ESP (type 0xef ) off an SD card now works as expected ...

2018/5/2 -I can get Device Descriptor : bcdUSB: 0x0200 bDeviceClass: 0xEF bDeviceSubClass: 0x02 bDeviceProtocol: 0x01 bMaxPacketSize0: 0x40 (64) idVendor: ...

2018/2/21 -Look in the Arduino core files for USBCore.cpp, Pluggable.cpp, and USBDesc.h. It is possible to change the USB descriptors but it is not easy.

3),. "A device that has multiple interfaces controlled independently of each other is referred to as a composite device." Using composite device, multiple ...