Hi, On 5/18/21 3:21 PM, Thomas Weißschuh wrote: > Hi everybody, > > Would it make sense to map the "Programmable Buttons" control from the > USB HID Consumer page [0] to the linux event codes KEY_MACRO1 ... KEY_MACRO# ? > > Those controls are documented in the USB spec as: > > "The user defines the function of these > buttons to control software applications or GUI objects." > > The KEY_MACRO event codes are documented with: > > "Some keyboards have keys which do not have a defined meaning, these keys > are intended to be programmed / bound to macros by the user." > > My usecase is the passing of custom keycodes from a programmable keypad > (via QMK[1]) to Linux. > (This would also need new functionality in QMK itself) I think the idea is good, but AFAICT the HUT does not actually assign any usage codes in the consumer-page for this. It simply points to the Button usage-page, which means things conflict with e.g. mouse and joystick buttons and I do not see any dedicated codes in the table "Table 15.1: Consumer Page" so I'm not sure how to interpret the spec. here ... I guess there is something which we can do with the report's application here, since the code dealing with HID_UP_BUTTON is already doing a switch-case on field->application to differentiate between mouse and gaming buttons. I guess interpreting an application of HID_CP_CONSUMER_CONTROL in combination with using the buttons usage-page as wat the HUT is trying to specify and thus map that the first 30 codes in that combination to KEY_MACRO1 - 30 might make sense. Regards, Hans > > Alternatives: > > * Send Raw HID from QMK > * Con: needs a dedicated, nonstandard driver on the host > * Use F-Keys > * Con: only F13-F19 are usable (F1-F12 are used by normal keyboards, F20-F23 > are repurposed with other keys for X11 compat) > > Possible problems: > > * There are 65k programmable keys defined by USB but only 30 macro keys are > supported by Linux. > > Thanks, > Thomas > > [0] https://www.usb.org/sites/default/files/hut1_22.pdf#section.15.14 > [1] https://qmk.fm/ >
