Keyboard: Difference between revisions
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m (Put matrix link in the right place) |
m (Fix rendering of bottom links) |
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Can be controlled in intensity by /sys/class/backlight device | Can be controlled in intensity by /sys/class/backlight device | ||
Hardware: | 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 15:19, 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