XMC™ Forum Discussions

We are working with an Infineon XMC4700 on PlatformIO.

Board: XMC4700 Relax Kit

PlatformIO 6.0.1

The project requires two serial interfaces. We see that the XMC has up to 6 Universal Serial Interface Channels, so we would like to use one of those as secondary serial interface. Is that possible?

We looked at the examples for serial communication but there is only for SPI and i2c.

Is HardwareSerial or at least SoftwareSerial implemented in XMC Arduino?

Thanks in advance!

Hi

I am writing an embedded application for Infineon XMC4500 microprocessor. I read data from different sensors and I send this data by means of bluetooth module in order to visualize them on the screen of Android smarphone. I use GraphView library.

I implemented BluetoothClass according to Android tutorial. If I get data from single sensor then everything is ok. But when I get data from multiple sensors unfortunately my application does not work smoothly.

Of course I am doing Bluetooth connection in seperate thread and I try to update UI in Handler. Tell me please what am I doing wrong. Of course I send data by means of JSON exchange format:

I send something like this from the microcontroller side:

  sprintf(json_data, "{"
                            "\"m\":"
                            "["
                                    "{"
                                        "\"id\":a,"
                                        "\"x\":%.2f,"
                                        "\"y\":%.2f,"
                                        "\"z\":%.2f"
                                    "},"
                                    "{"
                                        "\"id\":g,"
                                        "\"x\":%.2f,"
                                        "\"y\":%.2f,"
                                        "\"z\":%.2f"
                                    "},"
                                    "{"
                                        "\"id\":m,"
                                        "\"x\":%.2f,"
                                        "\"y\":%.2f,"
                                        "\"z\":%.2f"
                                    "},"
                                    "{"
                                        "\"id\":t,"
                                        "\"x\":%.2f"
                                    "},"
                                    "{"
                                        "\"id\":h,"
                                        "\"x\":%.2f"
                                    "}"
                            "]"
                        "}", getAccelXf(), getAccelYf(), getAccelZf(), getGyroXf(), getGyroYf(), getGyroZf(), getMagnetXf(), getMagnetYf(), getMagnetZf(), readTemperature(), readHumidity());

As an attachment to my request I add pieces of source code:

    public class ConnectedThread extends Thread
{
    BluetoothSocket connectedSocket;
    InputStream inStream;
    OutputStream outStream;

    public ConnectedThread(BluetoothSocket socket)
    {
        connectedSocket = socket;
        InputStream tmpIn = null;
        OutputStream tmpOut = null;



        try
        {

            if (connectedSocket != null)
            {
                tmpIn = connectedSocket.getInputStream();
                tmpOut = connectedSocket.getOutputStream();
                mHandler.obtainMessage(Constants.MESSAGE_DEVICE_CONNECTED_SUCCESSFULLY).sendToTarget();
               // Toast.makeText(activityContext, "connectedSocket != null", Toast.LENGTH_LONG);
            }
        }
        catch (IOException e) {
            mHandler.obtainMessage(Constants.MESSAGE_INPUT_OUTPUT_STREAM_UNAVAILABLE).sendToTarget();
            e.printStackTrace();
        }

        inStream = tmpIn;
        outStream = tmpOut;
    }

    public void run()
    {

        if(bluetoothAdapter.isDiscovering()){
            bluetoothAdapter.cancelDiscovery();
        }

        byte[] buffer = new byte[4096];
        int bytes;

        String dupa;

        while (true)
        {
            try {
                if (inStream != null)
                {
                    bytes = inStream.available();

                    if(bytes > 0 && bytes <= 200)
                    {
                        byte[] pocketBytes = new byte[bytes];
                        inStream.read(pocketBytes);
                        //Log.d(TAG, "setState() " + mState + " -> " + state);
                        System.out.println(pocketBytes.toString());
                        dupa = pocketBytes.toString();
                        System.out.println(dupa);

                        mHandler.obtainMessage(MESSAGE_READ, bytes, -1, pocketBytes).sendToTarget();
                    }
                }
            } catch (IOException e) {
                mHandler.obtainMessage(Constants.MESSAGE_REMOTE_DEV_DISCONNECTED).sendToTarget();
                break;
            }

            /*try
            {
                Thread.sleep(250);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }*/
        }
    }

    /* Call this from the main activity to send data to the remote device */
    public void write(byte[] bytes) {
        try {
            outStream.write(bytes);
        } catch (IOException e) { }
    }

    /* Call this from the main activity to shutdown the connection */
    public void cancel() {
        try {
            connectedSocket.close();
        } catch (IOException e) { }
    }
}

}

And after that I try to update UI in the Handler.

It does not work smoothly, morever sometimes it does not respond.

Could you please tell me what am I doing wrong azar echatrandom ?

Thx in advance.