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Ondrej Jirman 6a5fe581b9 Implement flashing over I2C and user/stock firmware support
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.
2021-06-28 15:09:47 +02:00
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README Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
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common.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
i2c-charger-ctl.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
i2c-debugger.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
i2c-flasher.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
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i2c-selftest.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
usb-debugger.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00
usb-flasher.c Implement flashing over I2C and user/stock firmware support 2021-06-28 15:09:47 +02:00

README

FOSS firmware for pinephone keyboard
====================================

Features:

- Dual firmware architecture: stock firmware + optional user firmware.
- Stock firmware implements the full functionality of the keyboard.
  - Stock firmware is layout independent, it reports the raw status
    of the whole keyboard matrix.
  - Key maps and combinations can be arbitrarily changed in the keyboard
    driver without re-flashing the firmware.
  - Stock firmware should be sufficient for most users who will not want
    to do HW modifications to their keyboard to add more peripherals to
    the keyboard MCU.
  - Power efficient implementation using power-down feature of the MCU
    to save power as much as possible. (currently: 9 mW when idle, 20mW
    in active scanning mode - with at least one key pressed)
- Stock firmware is flashed in factory and allows flashing user firmware
  from the pinephone itself over I2C interface.
- User firmware can be used either for updates or for customizations
  (SW support for HW modifications of the keyboard)
- USB stack and tools for stock firmware flashing using ELAN's original
  bootloader to ease development of the stock firmware.
- Self-testing features to quickly test for issues with the keyboard matrix.
- Fully based on FOSS software, with no dependencies. You only need
  sdcc 4.1+ to build the firmware.

See demo video https://megous.com/dl/tmp/kb.mp4 and some technical overview https://xnux.eu/log/

You can support the project via donations at https://xnux.eu/contribute.html#toc-donations

See also Samuel's kernel driver:

  https://github.com/smaeul/linux/commits/wip/pp-keyboard

Enjoy!

	~megi