Function enterDeepSleep

src/main.cpp:237–270

Enter deep sleep mode

// Enter deep sleep mode
void enterDeepSleep(bool fromTimeout = false) {
  HalPowerManager::Lock powerLock;  // Ensure we are at normal CPU frequency for sleep preparation
  APP_STATE.lastSleepFromReader = activityManager.isReaderActivity();

  const bool isQuickResumeSleep =
      SETTINGS.sleepScreen == CrossPointSettings::SLEEP_SCREEN_MODE::QUICK_RESUME ||
      (fromTimeout &&
       SETTINGS.quickResumeSleepScreen == CrossPointSettings::QUICK_RESUME_SLEEP_SCREEN::QUICK_RESUME_AFTER_TIMEOUT);
  APP_STATE.showBootScreen = !isQuickResumeSleep;

  APP_STATE.saveToFile();

  // Commit to sleeping before goToSleep() runs the outgoing activity's onExit():
  // a WiFi activity would otherwise silentRestart() here and reboot instead.
  deepSleepInProgress = true;
  activityManager.goToSleep(fromTimeout);

  if (isQuickResumeSleep) {
    saveSleepFrameBuffer();
  }

  // Tear down WiFi so the modem power domain isn't held alive across deep sleep.
  // Wake from deep sleep is effectively a chip reset, so no state needs to survive.
  if (WiFi.getMode() != WIFI_MODE_NULL) {
    WiFi.disconnect(true);
    WiFi.mode(WIFI_OFF);
  }

  halTiltSensor.deepSleep();
  display.deepSleep();
  LOG_DBG("MAIN", "Entering deep sleep");

  powerManager.startDeepSleep(gpio);
}

void setupDisplayAndFonts(bool seamless = false) {
  display.begin(seamless);