 
 #define SLEEP_TIME_MS       (250)
 
+#define REDRAW_FLAG         (0x80)
 
 SSD1331 oled = SSD1331(cs, dc, mosi, sclk);
 

  menu_init();
  status_init();
  watch_init(now);
  batlog_init(0x33);
  sync_init();

  oled.fillScreen(COLOR_BLACK);

  if (nextscreen != currentScreen) {
    oled.fillScreen(COLOR_BLACK);
    currentScreen = nextscreen;
    changes |= REDRAW_FLAG;
  }

  switch(nextscreen) {
    case SCREEN_STATUS:
      status_show(changes);
      delay(3000);
      break;

