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Two build errors: 1. RAW_EPSIZE undeclared — usb_descriptor.h is not in scope when keymap.c is compiled through Keychron's build path. Replace all uses with HID_PACKET_SIZE (= 32), now defined in hid_protocol.h. 2. via_command_kb duplicate symbol — keychron_raw_hid.c already defines via_command_kb (non-weak) so we cannot redefine it in keymap.c. Fix by adding a weak kc_raw_hid_rx_kb() extension hook to keychron_raw_hid.c (following the same pattern as kc_rgb_matrix_rx). kc_raw_hid_rx() now calls this hook from its default case instead of returning false directly. The keymap overrides kc_raw_hid_rx_kb() to handle our custom HID command range (0x40-0x7E).
Quantum Mechanical Keyboard Firmware
This is a keyboard firmware based on the tmk_keyboard firmware with some useful features for Atmel AVR and ARM controllers, and more specifically, the OLKB product line, the ErgoDox EZ keyboard, and the Clueboard product line.
Documentation
The docs are powered by Docsify and hosted on GitHub. They are also viewable offline; see Previewing the Documentation for more details.
You can request changes by making a fork and opening a pull request, or by clicking the "Edit this page" link at the bottom of any page.
Supported Keyboards
The project also includes community support for lots of other keyboards.
Maintainers
QMK is developed and maintained by Jack Humbert of OLKB with contributions from the community, and of course, Hasu. The OLKB product firmwares are maintained by Jack Humbert, the Ergodox EZ by ZSA Technology Labs, the Clueboard by Zach White, and the Atreus by Phil Hagelberg.
Official Website
qmk.fm is the official website of QMK, where you can find links to this page, the documentation, and the keyboards supported by QMK.