private void Load()
{
evalBoard = new Rhythm.Net.Rhd2000EvalBoard();
// Open Opal Kelly XEM6010 board.
evalBoard.Open();
samplesPerBlock = Rhd2000DataBlock.GetSamplesPerDataBlock(evalBoard.IsUsb3());
try
{
// Load Rhythm FPGA configuration bitfile (provided by Intan Technologies).
evalBoard.UploadFpgaBitfile(BitFileName);
// Initialize interface board.
evalBoard.Initialize();
// Set sample rate and upload all auxiliary SPI command sequences.
ChangeSampleRate(SampleRate);
// Run ADC calibration
RunCalibration();
// Set default configuration for all eight DACs on interface board.
SetDacDefaultConfiguration();
// Find amplifier chips connected to interface board and compute their
// optimal delay parameters.
ScanConnectedAmplifiers();
}
catch
{
// Close interface board in case of configuration errors
evalBoard.Close();
throw;
}
}
public Rhd2000EvalBoard()
{
BitFileName = "main.bit";
SampleRate = AmplifierSampleRate.SampleRate20000Hz;
LowerBandwidth = 0.1;
UpperBandwidth = 7500.0;
DspCutoffFrequency = 1.0;
DspEnabled = true;
source = Observable.Create <Rhd2000DataFrame>((observer, cancellationToken) =>
{
var activeTtlOut = ttlOut = 0;
return(Task.Factory.StartNew(() =>
{
Load();
var ledSequence = LedSequence();
try
{
evalBoard.SetTtlMode(0);
evalBoard.SetTtlOut(activeTtlOut);
evalBoard.SetContinuousRunMode(true);
evalBoard.EnableExternalFastSettle(ExternalFastSettleEnabled);
evalBoard.Run();
var blocksToRead = GetDataBlockReadCount(SampleRate);
var fifoCapacity = Rhythm.Net.Rhd2000EvalBoard.FifoCapacityInWords();
var queue = new Queue <Rhd2000DataBlock>();
ledSequence.MoveNext();
while (!cancellationToken.IsCancellationRequested)
{
if (activeTtlOut != ttlOut)
{
activeTtlOut = ttlOut;
evalBoard.SetTtlOut(activeTtlOut);
}
if (evalBoard.ReadDataBlocks(blocksToRead, queue))
{
var wordsInFifo = evalBoard.NumWordsInFifo();
var bufferPercentageCapacity = 100.0 * wordsInFifo / fifoCapacity;
foreach (var dataBlock in queue)
{
observer.OnNext(new Rhd2000DataFrame(dataBlock, bufferPercentageCapacity));
}
queue.Clear();
ledSequence.MoveNext();
}
}
}
finally
{
ledSequence.Dispose();
evalBoard.ClearTtlOut();
evalBoard.SetContinuousRunMode(false);
evalBoard.SetMaxTimeStep(0);
evalBoard.Flush();
evalBoard.Close();
evalBoard = null;
chipRegisters = null;
}
},
cancellationToken,
TaskCreationOptions.LongRunning,
TaskScheduler.Default));
})
.PublishReconnectable()
.RefCount();
}