/// <summary>
/// Worker to monitor think gear data
/// </summary>
private void ThinkGearWorker(object sender, DoWorkEventArgs e)
{
// stopwatch for timing
Stopwatch sw = new Stopwatch();
sw.Start();
// main loop, until worker is cancelled
while (true)
{
// check if we should cancel
if (_Worker.CancellationPending)
{
e.Cancel = true;
break;
}
// Read all currently available Packets, one at a time
int packetsRead = ThinkGear.TG_ReadPackets(connectionId, 1);
if (packetsRead == 1)
{
double _etime = (double)sw.ElapsedMilliseconds / 1000; // elapsed time since start in seconds
ReadPacket(connectionId, ThinkGear.DATA_ATTENTION, _etime, "atn");
ReadPacket(connectionId, ThinkGear.DATA_MEDITATION, _etime, "med");
ReadPacket(connectionId, ThinkGear.DATA_POOR_SIGNAL, _etime, "sig");
}
}
}
/// <summary>
/// Check if packet that was read contains a certain data type, and prints its value
/// </summary>
/// <param name="connectionId">ThinkGear connectionId</param>
/// <param name="DATA_TYPE">ThinkGear.DATA_* code</param>
/// <param name="etime">ellapsed time in seconds</param>
/// <param name="label">label for list box output</param>
private void ReadPacket(int connectionId, int DATA_TYPE, double etime, string label)
{
// format string for print out
string fmt1 = "{0,10:f3}: {1,5:s}: {2,6:g} 0x{2,4:X4}";
if (ThinkGear.TG_GetValueStatus(connectionId, DATA_TYPE) != 0)
{
float res = ThinkGear.TG_GetValue(connectionId, DATA_TYPE);
string sout = String.Format(fmt1, etime, label, (short)res);
lstBoxLog.Invoke((Action <string>)AddItem, sout);
}
}
/// <summary>
/// Start/Stop button event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnStart_Click(object sender, EventArgs e)
{
// Start collecting data
if (btnStart.Text.StartsWith("Start"))
{
bool StartSuccess = true;
// update COM port
Properties.Settings.Default.userCOMPort = cmboCOM.SelectedIndex; // remember user's selection
Properties.Settings.Default.Save();
portName = @"\\.\" + (string)cmboCOM.SelectedItem;
// Update text
btnStart.Enabled = false;
lstBoxLog.Items.Add("Starting data collection on ThinkGear DLL version: " +
ThinkGear.TG_GetDriverVersion().ToString());
// Request connection ID
connectionId = ThinkGear.TG_GetNewConnectionId();
if (connectionId < 0)
{
lstBoxLog.Items.Add("ERROR: TG_GetNewConnectionId() returned "
+ connectionId.ToString());
StartSuccess = false;
}
// start Stream/Data Loggers
if (!_Log(connectionId, "data_log.txt", ThinkGear.TG_SetDataLog) ||
!_Log(connectionId, "stream_log.txt", ThinkGear.TG_SetStreamLog))
{
StartSuccess = false;
}
// Do connection
int errCode = ThinkGear.TG_Connect(connectionId,
portName,
ThinkGear.BAUD_57600,
ThinkGear.STREAM_PACKETS);
if (errCode != 0)
{
lstBoxLog.Items.Add("ERROR: TG_Connect() returned " +
errCode.ToString());
StartSuccess = false;
}
// done setting up
if (StartSuccess)
{
_Worker.RunWorkerAsync(); // start thread
btnStart.Text = "Stop Collecting Data";
}
btnStart.Enabled = true;
}
// stop collecting data
else if (btnStart.Text.StartsWith("Stop"))
{
btnStart.Enabled = false;
// Stop worker
_Worker.CancelAsync();
// Disconnect
ThinkGear.TG_FreeConnection(connectionId);
// print out
btnStart.Text = "Start connection on port " + portName;
lstBoxLog.Items.Add("done stopping worker");
btnStart.Enabled = true;
}
else
{
MessageBox.Show("Error in btnStart_Click");
}
}