QMK Oled Code

#ifdef OLED_DRIVER_ENABLE // --------------------------------------------------

//configuration settings
#define WPM_THRESHOLD 70
#define WPM_DURATION 4000
#define LOWEST_WPM 60
#define FRAMERATE 20  //20 frames per second
#define NUM_FRAMES 5  //number of frames in the animation

const uint16_t FRAME_DURATION = 1000/FRAMERATE;  //length of each frame in ms

void render_anim(void) {
    static uint16_t frame_timer = 0;    //when was the last frame drawn?
    static uint16_t current_frame = 0;  //which frame is the animation on?
    static bool anim_active = false;    //is the animation going?
    static uint16_t wpm_timer = 0;      //when was WPM_THRESHOLD reached?

    //exit and do nothing if it is not yet time to draw the next frame
    if (timer_elapsed(frame_timer) < FRAME_DURATION)
        return;

    frame_timer = timer_read();  //set the time that this frame is calculated/drawn

    uint8_t wpm = get_current_wpm();    //store the current wpm on each program loop

    //if wpm is below LOWEST_WPM, reset the timer to 0
    if (wpm < LOWEST_WPM) {
        wpm_timer = 0;
        //reset OLED if animation was started
        if (anim_active) {
            oled_clear();
            anim_active = false;
            current_frame = 0;
        }
        return;
    }

    //if wpm_timer is 0, mark the time when wpm reaches WPM_THRESHOLD
    if (!wpm_timer && wpm > WPM_THRESHOLD) {
        wpm_timer = timer_read();
    }

    //reset wpm_timer if it is set and wpm goes below WPM_THRESHOLD before WPM_DURATION
    if (wpm_timer && !anim_active && wpm < WPM_THRESHOLD) {
        wpm_timer = 0;
    }

    //if WPM_THRESHOLD has been maintained for WPM_DURATION time, start animation
    if (wpm_timer && timer_elapsed(wpm_timer) >= WPM_DURATION) {
        anim_active = true;
    }

    //if animation has started and wpm is above LOWEST_WPM, draw a frame and advance to the next one
    if (anim_active && wpm >= LOWEST_WPM) {
        oled_write_raw_P(frame[current_frame], FRAME_SIZE);
        current_frame = (current_frame + 1) % NUM_FRAMES;
    }
}


//this is called automatically on every program loop
void oled_task_user(void) {
    render_anim();
}

#endif  //OLED_DRIVER_ENABLE --------------------------------------------------