Method open

app/src/IO/Drivers/SeeedCanBackend.cpp:202–237

* @brief Opens the serial port and sends the analyzer initialization frame. */

 * @brief Opens the serial port and sends the analyzer initialization frame.
 */
bool IO::Drivers::SeeedCanBackend::open()
{
  const auto requested = configurationParameter(QCanBusDevice::BitRateKey).toUInt();
  if (seeedBitrateCode(requested == 0 ? 500000 : requested) == 0) {
    setError(tr("The bitrate %1 bps is not supported by the USB-CAN Analyzer.").arg(requested),
             QCanBusDevice::ConfigurationError);
    setState(QCanBusDevice::UnconnectedState);
    return false;
  }

  m_port = new QSerialPort(m_portName, this);
  m_port->setBaudRate(kSeeedBaudRate);

  if (!m_port->open(QIODevice::ReadWrite)) {
    setError(tr("Could not open serial port %1: %2").arg(m_portName, m_port->errorString()),
             QCanBusDevice::ConnectionError);
    m_port->deleteLater();
    m_port = nullptr;
    setState(QCanBusDevice::UnconnectedState);
    return false;
  }

  connect(m_port, &QSerialPort::readyRead, this, &SeeedCanBackend::onReadyRead);

  if (!sendInitFrame(requested == 0 ? 500000 : requested)) {
    setError(tr("Failed to initialize the USB-CAN Analyzer."), QCanBusDevice::ConnectionError);
    m_port->close();
    m_port->deleteLater();
    m_port = nullptr;
    setState(QCanBusDevice::UnconnectedState);
    return false;
  }

  setState(QCanBusDevice::ConnectedState);
  return true;
}

/**
 * @brief Closes the serial port.