Keyboard firmwares for Atmel AVR and Cortex-M
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di0ib ac70ea56ae Update 5 years ago
pcb Update 5 years ago
FLASH.bin mf68 5 years ago
GNAP.jpg GNAP keyboard 5 years ago
LED_FastGPIO.ino GNAP keyboard 5 years ago
Makefile GNAP keyboard 5 years ago
config.h GNAP keyboard 5 years ago
gnap.bin mf68 5 years ago
keymap_common.h i75, cleanup keymaps 5 years ago
keymap_gnap.c update keymap 5 years ago
led.c mf68 5 years ago
matrix.c i75, cleanup keymaps 5 years ago
pcb-front.png GNAP keyboard 5 years ago Update readme 5 years ago
schematic.png GNAP keyboard 5 years ago

GNAP! keyboard firmware

GNAP! 1.0 Assembled

GNAP! dual matrix, dual controller. Per key LED control, reactive lighting. GNAP! 1.0 PCB Front GNAP! 1.0 PCB Schematic

Dual Pro Micro’s. One running TMK, the other running an Arduino sketch driving the LEDs. Pro Micro’s are connected to each other via hardware serial UART.


Rows D1, D0, D4, C6 
Cols D7, E6, B4, B5, B6, B2, B3, B1, F7, F6, F5, F4

keymap_gnap.c contains functions to send bytes to the LED controller. The Arduino code interprets these to change modes or brightness.

//GNAP keymap functions
void gnaplight_step(void) {

void gnaplight_toggle(void) {

\tmk_core\common\keyboard.c was modified to send the row/column of the key being pressed encoded as as single byte over the serial link to the LED controller.

                //send single byte with value of row column

The example Arduino sketch LED_FastGPIO.ino uses the fastGPIO and TimerOne libraries. These can be installed with the Library manager.

FastGPIO TimerOne