Keyboard: Difference between revisions
Jump to navigation
Jump to search
(→Keyboard: keymat) |
(Adding hardware links) |
||
| Line 1: | Line 1: | ||
= | = Keymats = | ||
[[Image:Pyra_KB_light.jpeg | 600px]] | [[Image:Pyra_KB_light.jpeg | 600px]] | ||
* '''[[Pyra]]'s Keyboard Lighted by one of the Prototype Boards.''' | * '''[[Pyra]]'s Keyboard Lighted by one of the Prototype Boards.''' | ||
| Line 20: | Line 20: | ||
[[Image:PyraKeymatAndButtonsFunctions.png | 600px]] | [[Image:PyraKeymatAndButtonsFunctions.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 | |||
== Software assignment by Linux Kernel == | == Software assignment by Linux Kernel == | ||
| Line 35: | Line 37: | ||
= Keyboard Backlight = | = Keyboard Backlight = | ||
Can be controlled in intensity by /sys/class/backlight device | |||
Hardware: | |||
[https://www.mouser.co.uk/ProductDetail/Texas-Instruments/LM3699YFQR?qs=%2Fha2pyFaduhXZavS7V%2FNrkiaZMAdUsvTTAVYSC9Hwm52N743kXz%2FJw%3D%3D LM3699YFQ] LED Lighting Driver - with PWM brightness control connected to the "KEYPAD-BL" line of the CPU module | |||
[https://www.mouser.co.uk/ProductDetail/OSRAM-Opto-Semiconductors/LW-Q38E-Q1OO-3K6L-1?qs=%2Fha2pyFaduhwSRLeTGlQhNJ8TM29iUaKFfvospjTD6WhzoCGchmx5g%3D%3D LW Q38E-Q1OO-3K6L-1] - 24 x White 0603 size LEDs | |||
Revision as of 15:15, 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
Hardware: TCA8418 - I2C Controlled Keypad Scan IC With Integrated ESD Protection
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
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