qmk_firmware/keyboards/sirius/uni660/rev1/rev1.c

#include "rev1.h"

void led_init(void) {
    setPinOutput(D1); // Pin to green, set as output
    writePinHigh(D1); // Turn it off
    setPinOutput(F4); // Pins to red and blue, set as output
    setPinOutput(F5);
    writePinHigh(F4); // Turn them off
    writePinHigh(F5);
}

void matrix_init_kb(void) {
    // put your keyboard start-up code here
    // runs once when the firmware starts up
    matrix_init_user();
    led_init();
}

/*
#ifdef SWAP_HANDS_ENABLE
__attribute__ ((weak))
const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
{{9, 0}, {8, 0}, {7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
{{9, 1}, {8, 1}, {7, 1}, {6, 1}, {5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
{{9, 2}, {8, 2}, {7, 2}, {6, 2}, {5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
{{9, 3}, {8, 3}, {7, 3}, {6, 3}, {5, 3}, {4, 3}, {3, 3}, {2, 3}, {1, 3}, {0, 3}},
{{9, 4}, {8, 4}, {7, 4}, {6, 4}, {5, 4}, {4, 4}, {3, 4}, {2, 4}, {1, 4}, {0, 4}},
};
#endif
*/