Keyboard

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Revision as of 15:19, 1 April 2021 by levi (talk | contribs) (Fix rendering of bottom links)
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Keymats

  • Pyra's Keyboard Lighted by one of the Prototype Boards.

  • Keymat texture used to generate the renders

Matrix and Keycodes

Keyboard matrix and button assignment

  • fixed by hardware: buttons and maeanders
  • connected to specific gpios and matrix lines
  • describes specific hardware revision

Software assignment by Linux Kernel

  • describes KEY_code for specific software revision (here letux-4.5.0 and later)
  • assumes specific hardware revision (here 5.0/5.1)
  • default Device Tree pyra-mainboard.dtsi
  • can be changed by modified device tree

TCA8418 Matrix

Hardware: TCA8418 - I2C Controlled Keypad Scan IC With Integrated ESD Protection

Keyboard Backlight

Can be controlled in intensity by /sys/class/backlight device

Hardware:

  • LM3699YFQ LED Lighting Driver - with PWM brightness control connected to the "KEYPAD-BL" line of the CPU module
  • LW Q38E-Q1OO-3K6L-1 - 24 x White 0603 size LEDs
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