/// <summary>
/// Do work - process sensor data
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AcquisitionWorker_DoWork(object sender, DoWorkEventArgs e)
{
backgroundIsFinished_ = false;
BackgroundWorker worker = sender as BackgroundWorker;
while (!worker.CancellationPending) //Do the work
{
foreach (USBdevice_GUI USB in USBdevices)
{
SingleTact singleTact = USB.singleTact;
SingleTactFrame newFrame = singleTact.ReadSensorData(); //Get sensor data
if (null != newFrame) //If we have data
{
USB.addFrame(newFrame);
// use first timestamp only to quantise readings and match csv output
AddData(USBdevices[0].lastTimeStamp, newFrame.SensorData, USB); //Add to stripchart
}
else // USB has been unplugged
{
new Thread(() =>
{
guiTimer_.Stop();
backgroundIsFinished_ = true;
var index = USBdevices.IndexOf(USB);
var comPort = comPortList[index];
var result = MessageBox.Show(
comPort.ToString() + " has been unplugged.\nWould you like to save your data before exiting?",
"Error!",
MessageBoxButtons.YesNo,
MessageBoxIcon.Error);
if (result == DialogResult.Yes)
{
buttonSave_Click(this, null);
}
Application.Exit();
}).Start();
backgroundIsFinished_ = false;
StopAcquisitionThread();
break;
}
//Calculate rate
double delta = newFrame.TimeStamp - USB.lastTimeStamp; // calculate delta relative to previous sensor's last reading
if (delta != 0)
{
measuredFrequency_ = measuredFrequency_ * 0.95 + 0.05 * (1.0 / (delta)); //Averaging
}
//measuredFrequency_ = 1/delta;
USB.setTimestamp(newFrame.TimeStamp);
}
}
}
