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- Refactor internal tracking structures from a single global keyboard pointer (_kbd) to a fixed-size array (_kbds) supporting up to MAX_KEYBOARDS (4). - Switch from synchronous interrupt reads to asynchronous transfers (USB_ReadIntrMsgAsync) to prevent slow or non-responsive HID devices (such as wireless receiver multi-interfaces) from blocking other keyboards. - Implement device skipping and pruning for non-keyboard HID interfaces to optimize scanning performance. - Update LED controls, event callbacks, and disconnection routines to iterate across all active keyboard slots safely.
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I came across this when I was updating DOSBox.
This updates libwiikeyboard to iterate over all devices reporting a keyboard HID descriptor and track them independently.
Many wireless mouse receivers (and other composite USB devices) report a keyboard interface even when no actual keyboard is connected. Previously, this meant that whichever device initialized first could block or interfere with recognition, meaning you could only use a real keyboard if it happened to be plugged in or initialized before those dummy interfaces.
By tracking multiple HID entries asynchronously, a mouse or dongle reporting a keyboard interface won't block your actual keyboard from working properly anymore.