Using TinyCAN Backend

The TinyCAN backend encapsulates the low-level API to work with the MHS Elektronik 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 == "tinycan") {
          // were found
          break;
      }
  }

Where tinycan is the backend name.

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

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

Where channela is the active CAN interface name. The TinyCAN backend provides two interfaces, channela and channelb.

Note: Only the USB 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 new frames are available for reading:

  QCanBusFrame frame = device->readFrame();

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