qmk-dactyl-manuform-a/keyboards/clueboard/66/rev3/rev3.c

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#include "rev3.h"
#include "print.h"
void backlight_init_ports(void) {
print("init_backlight_pin()\n");
// Set our LED pins as output
DDRD |= (1<<6); // Esc
DDRB |= (1<<7); // Page Up
DDRD |= (1<<4); // Arrows
// Set our LED pins low
PORTD &= ~(1<<6); // Esc
PORTB &= ~(1<<7); // Page Up
PORTD &= ~(1<<4); // Arrows
}
void backlight_set(uint8_t level) {
if ( level == 0 ) {
// Turn off light
PORTD |= (1<<6); // Esc
PORTB |= (1<<7); // Page Up
PORTD |= (1<<4); // Arrows
} else {
// Turn on light
PORTD &= ~(1<<6); // Esc
PORTB &= ~(1<<7); // Page Up
PORTD &= ~(1<<4); // Arrows
}
}