usb host: poll report-protocol HID keyboards#11126
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dhalbert merged 1 commit intoJul 17, 2026
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The host keyboard workflow only started polling boot-protocol
keyboards. CircuitPython usb_hid devices use report protocol with
report IDs, so their reports were never read and the device raised
OSError("USB busy") on the second send_report().
Detect keyboards by report descriptor usage, strip the report ID
prefix, and always re-arm reception after each report.
Fixes adafruit#10721
dhalbert
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Jul 17, 2026
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Thanks! It's complicated but I don't see a simple refactoring immediately.
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Fixes #10721
The host keyboard workflow only polled boot-protocol keyboards.
CircuitPython usb_hid devices use report protocol with report IDs,
so their reports were never read.
This PR allows boot and non-boot keyboards to be polled correctly.
Tested: MacroPad plugged into a Fruit Jam at tip of main. Before:
"USB busy" on first keypress. After: keys type into the Fruit Jam console.
Also retested a regular boot-protocol keyboard on the patched build, no regression.