private void btnConnect_Click(object sender, EventArgs e)
{
if (_comPort != null && _comPort.IsOpen)
{
_comPort.Close();
}
_comPort = new SerialPort(comboBoxPorts.Text, (int)numericBaudRate.Value);
_comPort.Parity = Parity.None;
_comPort.StopBits = StopBits.One;
_comPort.DataBits = 8;
_comPort.Handshake = Handshake.None;
AppendConsoleText("Connecting...\r\n");
try
{
_comPort.Open();
}
catch (Exception ex)
{
AppendConsoleText($"Error! Cannot open {comboBoxPorts.Text}: {ex.Message}");
UpdateConnected(false);
return;
}
_rtd = new RTD266x(_comPort);
UpdateConnected(true);
RTD266x.ErrorCode errorCode = RTD266x.ErrorCode.NoError;
uint errorInfo = 0;
RTD266x.Result result = RTD266x.Result.NotOk;
int retries = 5;
// try to connect a few times
for (int i = 0; i < retries; i++)
{
result = _rtd.ReadErrorCode(out errorCode, out errorInfo);
if (result == RTD266x.Result.Ok)
{
break;
}
_rtd.ClearReadBuffer();
AppendConsoleText($"Connection error: {RTD266x.ResultToString(result)}, retrying... ({i + 1}/{retries})\r\n");
}
if (result != RTD266x.Result.Ok)
{
AppendConsoleText($"Connection error: {RTD266x.ResultToString(result)}\r\n");
AppendConsoleText("Did you download the sketch RTD266xArduino to your Arduino?\r\n");
AppendConsoleText("Is the Arduino connected properly to the display?\r\n");
AppendConsoleText("Did you select the correct COM port?\r\n");
AppendConsoleText("Is the display powered?\r\n");
AppendConsoleText("If the Arduino's user LED is on, the I2C connection to the display does not work.\r\n");
AppendConsoleText("Press the Arduino's reset button and try again.\r\n\r\n");
btnDisconnect_Click(null, null);
return;
}
if (errorCode == RTD266x.ErrorCode.NoError)
{
AppendConsoleText("Connection successful!\r\n");
}
else
{
AppendConsoleText("Initialization error: ");
AppendConsoleText(RTD266x.ErrorCodeToString(errorCode, errorInfo) + "\r\n");
btnDisconnect_Click(null, null);
}
}
