qmk_firmware/keyboards/acheron/athena/alpha/alpha.c

/* Copyright 2020 Gondolindrim
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "quantum.h"

void board_init(void) {
    setPinInput(B6);
    setPinInput(B7);
}

void keyboard_post_init_kb(void){
 // Defining the backlight pin (A6) as an floating (no pullup or pulldown resistor) opendrain output pin
    palSetLineMode(BACKLIGHT_PIN, PAL_MODE_ALTERNATE(BACKLIGHT_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING);
}

void led_init_ports(void) {
    palSetLineMode(LED_CAPS_LOCK_PIN, PAL_MODE_OUTPUT_OPENDRAIN | PAL_STM32_PUPDR_FLOATING);
}

bool led_update_kb(led_t led_state) {
    bool res = led_update_user(led_state);
    #ifdef CAPSLOCK_INDICATOR
    if(res) {
        writePin(LED_CAPS_LOCK_PIN, !led_state.caps_lock);
    }
    #else
    writePin(LED_CAPS_LOCK_PIN, 0);
    #endif
    return res;
}