qmk-firmware/keyboards/pearl/pearl.c

/*
Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>

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 "pearl.h"

void backlight_init_ports(void) {
    // initialize pins D0, D1, D4 and D6 as output
    setPinOutput(D0);
    setPinOutput(D1);
    setPinOutput(D4);
    setPinOutput(D6);

    // turn backlight LEDs on
    writePinHigh(D0);
    writePinHigh(D1);
    writePinHigh(D4);
    writePinHigh(D6);
}

void backlight_set(uint8_t level) {
    if (level == 0) {
        // turn backlight LEDs off
        writePinLow(D0);
        writePinLow(D1);
        writePinLow(D4);
        writePinLow(D6);
    } else {
        // turn backlight LEDs on
        writePinHigh(D0);
        writePinHigh(D1);
        writePinHigh(D4);
        writePinHigh(D6);
    }
}