public override int Read(byte[] buffer, int offset, int count)
{
//This is getting called when the ND command is sent - why?
//Note, it's not clear why BinarySerializer ends up calling this method.
//The following is a work around which needs review.
//Do the same checks as the aync version.
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (offset != 0)
{
throw new ArgumentOutOfRangeException(nameof(offset), offset, "Must be zero.");
}
//Receive the data in a blocking fashion.
Task <byte[]> dataTask = _serialDevice.ReadAsync((uint)count, new CancellationToken());
dataTask.Wait();
byte[] data = dataTask.Result;
Array.Copy(data, buffer, data.Length);
return(data.Length);
}
public override Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (offset != 0)
{
throw new ArgumentOutOfRangeException(nameof(offset), offset, "Must be zero.");
}
if (count != buffer.Length)
{
throw new ArgumentOutOfRangeException(nameof(count), count, "Must match buffer length.");
}
return(_serialDevice.ReadAsync(buffer, offset, count, cancellationToken));
}
public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (offset != 0)
{
throw new ArgumentOutOfRangeException(nameof(offset), offset, "Must be zero.");
}
if (count != buffer.Length)
{
throw new ArgumentOutOfRangeException(nameof(count), count, "Must match buffer length.");
}
var data = await _serialDevice.ReadAsync((uint)count, cancellationToken);
Array.Copy(data, buffer, data.Length);
return(data.Length);
}
public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (offset != 0)
{
throw new ArgumentOutOfRangeException(nameof(offset), offset, "Must be zero.");
}
var data = await _serialDevice.ReadAsync((uint)count, cancellationToken).ConfigureAwait(false);
Array.Copy(data, buffer, data.Length);
return(data.Length);
}
private async void StartReadingData()
{
while (true) // todo: build in cancellation support
{
try
{
var bytesInQueue = device.GetQueueStatus();
bytesInQueue = Math.Max(bytesInQueue, 1); // to make sure we don't create a cpu eating loop
var buffer = new byte[bytesInQueue];
var bytesRead = await device.ReadAsync(buffer, bytesInQueue);
ReadBuffer = ReadBuffer.Concat(bytesRead).ToArray();
}
catch (Exception ex)
{
WriteToLog(string.Format("Exception occurred: {0}", ex.Message));
}
}
}
