QMK Stop Screensaver

/*  https://www.reddit.com/r/olkb/comments/pgdsh6/possible_to_keep_screen_alive_with_qmk/
 *  Code to prevent computer from falling asleep.
 *  This should go into keymap.c
 */

#define SCREENSAVE_DELAY 120000  //configure how long to wait after last activity. 120000ms = 2 mins

enum custom_keycodes {
    NO_SLEEP = SAFE_RANGE,  //custom macro key.  turns on screensaver mode
    //other macros,
    //...
};


bool stop_screensaver = false;     //screensaver mode status
uint32_t last_activity_timer = 0;

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    if (record->event.pressed)
        stop_screensaver = false;  //turn off screensaver mode on any keypress

    switch (keycode) {
        case NO_SLEEP:
            if (record->event.pressed) {               //if NO_SLEEP is pressed
                stop_screensaver = true;               //turn on screensaver mode
                last_activity_timer = timer_read32();  //reset timer
            }
            break;
        //other macros...
    }
    return true;
}


void matrix_scan_user(void) {
    if (stop_screensaver) {                                             //if screensaver mode is active
        if (timer_elapsed32(last_activity_timer) > SCREENSAVE_DELAY) {  //and no key has been pressed in more than SCREENSAVE_DELAY ms
            tap_code16(KC_F13);                                         //  tap F13
            last_activity_timer = timer_read32();                       //  reset last_activity_timer
        }
    }
}