Using PeakCAN Backend

The PeakCAN backend encapsulates the low-level API to work with the PEAK-System CAN adapters.

Creating CAN Bus Devices

At first it is necessary to check that QCanBus provides the desired backend:

  foreach (const QByteArray &backend, QCanBus::instance()->plugins()) {
      if (backend == "peakcan") {
          // were found
          break;
      }
  }

Where peakcan is the backend name.

Next, a connection to a specific interface can be established:

  QCanBusDevice *device = QCanBus::instance()->createDevice("peakcan", QStringLiteral("usbbus1"));
  device->connectDevice();

Where usbbus1 is the active CAN interface name. The PeakCAN backend supports eight USB interfaces from usbbus1 to usbbus8 and eight PCI interfaces from pcibus1 to pcibus8.

Note: Only the USB and PCI adapters are currently supported by this backend.

The device is now open for writing and reading CAN frames:

  QCanBusFrame frame;
  frame.setFrameId(8);
  QByteArray payload("A36E");
  frame.setPayload(payload);
  device->writeFrame(frame);

The reading can be done using the readFrame() method. The framesReceived() signal is emitted when a new frame is available for reading:

  QCanBusFrame frame = device->readFrame();

PeakCAN supports the following configurations that can be controlled through setConfigurationParameter():