What happens when we insert a third-party board with a processor via usb?

Question

System Programming

Good afternoon, tell me, when we insert a third-party board with a processor, how does the computer determine whether it can see it or not, and what is written in the drivers for it?
And if a program is already installed for him, how does he implement the search, can he see it or not?

Answer 1

All USB devices, when connected, give information about their class and Vendor / Device identifiers, with this information the OS looks to see if it has suitable drivers. The same information is available to programs to search for devices of interest.