mirror of
https://xff.cz/git/pinephone-keyboard/
synced 2024-11-09 22:15:42 +01:00
6a5fe581b9
I2C register layout changed a bit to make various operations easier to implement in FW and for the user. Flashing/debugging tools now share more code. Firmware is now more configurable (it's now possible to compile-out various features). Self-testing for column-shorts is implemented. Firmware is optimized for low power consumption.
55 lines
1.8 KiB
Text
55 lines
1.8 KiB
Text
Firmware
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- implement I2C configuration options
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- disable keyboard matrix scanning
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- only enable USB in stock FW upon request over I2C (idling USB stack takes
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about 0.6mA on top of 1.8mA baseline)
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- first I2C TX after switch to USER firmware after flasging over I2C fails,
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subsequent ones work
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- also power consumption indicates power consumption of the sotck firmware
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so maybe we just sleep in stock instead of switching after flashing?
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- power measurement / optimization
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- currently with no USB stack and in constant PD mode: 1.8mA
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- theoretical lower limit 0.5mA (no idea how they achieve it)
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Charger behavior
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----------------
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- does the charger turn off VOUT after some period of low load?
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- does it enable it again to see if there's a need for it?
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- this auto-off behavior will kill the power to the keyboard
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controller, so we need a way to detect it and power the controller
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from the pinephone side by enabling VBUS.
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- tricky!
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- or make the user keep pressing the kb power button to use the
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keyboard for a while, like in a train conductor has to in a train :)
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- not good!
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Userspace input device daemon
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-----------------------------
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- allow to read keymap config from a file instead of compiling it in
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- improve combo key handling
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- sticky keys entry mode?
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- add various modal modes:
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- show modal hints on the display
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- write to linux console framebuffer directly
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- run a generic process/script (eg. to show mode in i3 status bar)
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Modes:
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- navigation mode arrows work as arrows without holding Fn key, holding
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Fn key inverts the meaning to primary (so Fn+Up types a 'dot')
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- sticky Fn mode (all keys act as if Fn is being held)
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- sticky keys mode (build a multi-key shortcut gradually, without having to
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hold multiple keys at once)
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- ???
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