Method open

app/src/IO/Drivers/UART.cpp:207–269

* @brief Opens the currently selected serial port with the specified mode. */

 * @brief Opens the currently selected serial port with the specified mode.
 */
bool IO::Drivers::UART::open(const QIODevice::OpenMode mode)
{
  if (m_deviceNames.isEmpty())
    refreshSerialDevices();

  auto ports  = portList();
  auto portId = portIndex();
  if (portId >= 1 && portId < ports.count()) {
    close();
    m_portIndex             = portId;
    m_lastSerialDeviceIndex = m_portIndex;
    Q_EMIT portIndexChanged();

    const auto name = ports.at(portId);

    if (m_deviceNames.contains(name)) {
      const auto target =
        portId < m_deviceLocations.count() ? m_deviceLocations.at(portId) : QString();
      const auto live = validPorts();

      const int matchIndex = matchPortByLocation(live, target);
      if (matchIndex < 0) {
        close();
        return false;
      }

      m_usingCustomSerialPort = false;
      m_port                  = new QSerialPort(live.at(matchIndex));
    }

    else if (m_customDevices.contains(name)) {
      m_usingCustomSerialPort = true;
      m_port                  = new QSerialPort(name);
    }

    if (!m_port)
      return false;

    port()->setParity(parity());
    port()->setBaudRate(baudRate());
    port()->setDataBits(dataBits());
    port()->setStopBits(stopBits());
    port()->setFlowControl(flowControl());
    port()->setReadBufferSize(idealSerialBufferSize(baudRate()));

    connect(port(), &QSerialPort::errorOccurred, this, &IO::Drivers::UART::handleError);

    if (port()->open(mode)) {
      connect(port(), &QIODevice::readyRead, this, &IO::Drivers::UART::onReadyRead);
      port()->setDataTerminalReady(dtrEnabled());
      return true;
    }

    else {
      Misc::Utilities::showMessageBox(tr("Failed to connect to serial port \"%1\"").arg(name),
                                      port()->errorString(),
                                      QMessageBox::Critical);
    }