private async Task Listen(DeviceAndReaderContainer container)
{
try
{
if (container.SerialDevice != null)
{
container.Reader = new DataReader(container.SerialDevice.InputStream);
// keep reading the serial input
while (true)
{
await ReadAsync(container);
}
}
}
catch (Exception ex)
{
if (ex.GetType().Name == "TaskCanceledException")
{
CloseDevice(container.SerialDevice);
}
else
{
}
}
finally
{
// Cleanup once complete
if (container.Reader != null)
{
container.Reader.DetachStream();
container.Reader = null;
}
}
}
private async Task ReadAsync(DeviceAndReaderContainer container)
{
try
{
//Realiza la lectura de puerto serie
uint ReadBufferLength = 1;
// If task cancellation was requested, comply
container.CancellationTokenSource.Token.ThrowIfCancellationRequested();
// Set InputStreamOptions to complete the asynchronous read operation when one or more bytes is available
container.Reader.InputStreamOptions = InputStreamOptions.Partial;
// Create a task object to wait for data on the serialPort.InputStream
var loadAsyncTask = container.Reader.LoadAsync(ReadBufferLength).AsTask(container.CancellationTokenSource.Token);
// Launch the task and wait
UInt32 bytesRead = await loadAsyncTask;
if (bytesRead > 0)
{
var data = container.Reader.ReadString(bytesRead);
concatCommand = concatCommand + data;
if (data == "\n")
{
ProcessArduinoResults(concatCommand);
Debug.WriteLine("L - " + contador + " : " + concatCommand);
++contador;
concatCommand = string.Empty;
}
}
}
catch (Exception ex)
{
//throw ex;
}
}
private DeviceAndReaderContainer CancelAsyncTask(DeviceInformation device)
{
var exist = false;
foreach (var deviceAndReaderContainer in this.containerList)
{
if (deviceAndReaderContainer.DeviceInformation != null &&
deviceAndReaderContainer.DeviceInformation.Id == device.Id)
{
if (deviceAndReaderContainer.CancellationTokenSource != null)
{
if (!deviceAndReaderContainer.CancellationTokenSource.IsCancellationRequested)
{
deviceAndReaderContainer.CancellationTokenSource.Cancel();
deviceAndReaderContainer.SerialDevice?.Dispose();
deviceAndReaderContainer.SerialDevice = null;
exist = true;
return(deviceAndReaderContainer);
}
}
}
}
if (!exist)
{
if (this.containerList == null)
{
this.containerList = new List <DeviceAndReaderContainer>();
}
var deviceRead = new DeviceAndReaderContainer();
deviceRead.DeviceInformation = device;
this.containerList.Add(deviceRead);
return(deviceRead);
}
return(null);
}