// -->> Writes the new data to a file <<--
//________________________________________
private async void OnNewDataEnqueuedFxn(object sender, EventArgs e)
{
int counter = 0;
while (busy || counter < 200)//Waits for another writing operation to complete
{
counter++;
}
if (!busy)
{ //Writes to file
busy = true; //Sets busy flag
thetaClass dequeued = null;
while (dataQueue.Count > 0)
{
if (dataQueue.TryDequeue(out dequeued))//Dqueues new data
{
await FileIO.AppendTextAsync(rootPage.dataFile, dequeued.StringTheta);
}
}
busy = false;//Releases flag
}
else
{//Failed to write to file
rootPage.notifyFlyout("Reached max number of iterations", connectButton);
}
}
public void AddPoints(thetaClass newPoints)
{
xPlot.Points.Add(new Point(axisX, zeroY - newPoints.ThetaX * scale)); //Acc X point
yPlot.Points.Add(new Point(axisX, zeroY - newPoints.ThetaY * scale)); //Acc Y point
zPlot.Points.Add(new Point(axisX, zeroY - newPoints.ThetaZ * scale)); //Acc Z point
//position.Points.Add(new Point(axisX, zeroY - newPoints.bodyPos * 100));//Acc Z point
graphCanvas.UpdateLayout();
axisX += tickX;
if (axisX > maxTickX)
{
axisX = 0;
Clear();
}
}
//New data is available at the sensor.
private async void Characteristic_ValueChanged(GattCharacteristic sender, GattValueChangedEventArgs args)
{
// BT_Code: An Indicate or Notify reported that the value has changed.
byte[] newValue;//Stores the byte arraw
//Reads the BLE buffer and stores its content into the newValue array
CryptographicBuffer.CopyToByteArray(args.CharacteristicValue, out newValue);
// Breathing monitoring notification
if (sender.Uuid.Equals(BrService.BREATHING_UUID))
{ // Notification from the IMU
double[] newData = new double[3]; //Stores the IMU values
//Converting bytes into Int8, and then to degrees
// The angles are quantized as a signed 8 bit number that
// represents -180 to 180 degrees
sbyte tmp0;
// Getting position
position = unchecked ((byte)newValue[18]);
int counter = 0;
for (int i = 0; i < 18; i++)
{//Getting angles
tmp0 = unchecked ((sbyte)newValue[i]);
newData[counter] = (tmp0 * 360) / 256;
counter++;
if (counter >= 3)
{
thetaClass newTetha = new thetaClass();
newTetha.ThetaData = newData;
dataQueue.Enqueue(newTetha);
plotQueue.Enqueue(newTetha);
counter = 0;
}
}
// Triggers queue event
if (OnNewDataEnqueued != null)
{
OnNewDataEnqueued(this, EventArgs.Empty);
}
//Fires graph refresh event
if (OnNewPointsAdded != null)
{
OnNewPointsAdded(this, EventArgs.Empty);
}
}
//Check for other services sending data...
}
// -->> Refreshes UI and Graph <<--
//_________________________________
private async void OnNewPointsAddedFxn(object sender, EventArgs e)
{// Updates the UI and the graph
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
counter += 6;
counterTextBlock.Text = counter.ToString();
thetaClass dequeued = null;
while (dataQueue.Count > 0)
{
if (dataQueue.TryDequeue(out dequeued)) //Dqueues new data
{
dataTextBlock.Text = dequeued.StringTheta;
graph.AddPoints(dequeued.ThetaData);
}
}
timerTextBlock.Text = Convert.ToString(stopwatch.Elapsed);
});
}
