Keyboard: Difference between revisions
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[[Image:PyraKeymatAndButtonsFunctions.png | 600px]] | [[Image:PyraKeymatAndButtonsFunctions.png | 600px]] | ||
== Software assignment by Linux Kernel == | == Software assignment by Linux Kernel == | ||
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[[Image:PyraTCA8418Matrix.png | 600px]] | [[Image:PyraTCA8418Matrix.png | 600px]] | ||
Hardware: [https://www.mouser.co.uk/ProductDetail/Texas-Instruments/TCA8418RTWR?qs=%2Fha2pyFadujXlQBv9iCnJd5eVW7Nie%2FLlVVE4u4oQM9U8gDo1X%252B6xg%3D%3D TCA8418] - I2C Controlled Keypad Scan IC With Integrated ESD Protection | |||
= Keyboard Backlight = | = Keyboard Backlight = | ||
Revision as of 15:17, 1 April 2021
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