/// <summary>
/// Prepare MCA-527 for a new sweep or cycle
/// </summary>
/// <param name="cycle">Cycle sequence number</param>
/// <param name="secs">Cycle length in seconds</param>
/// <exception cref="MCADeviceLostConnectionException">An error occurred communicating with the device.</exception>
bool InitSettings(ushort cycle, uint secs)
{
MCAResponse response = null;
response = m_device.Client.Send(MCACommand.Clear(ClearMode.ClearMeasurementData0));
if (response == null)
{
throw new MCADeviceLostConnectionException();
}
response = m_device.Client.Send(MCACommand.Clear(ClearMode.ClearMeasurementData1));
if (response == null)
{
throw new MCADeviceLostConnectionException();
}
if (cycle == 1) // init some values on first cycle
{
response = m_device.Client.Send(MCACommand.SetPresets(Presets.Real, secs));
if (response == null)
{
throw new MCADeviceLostConnectionException();
}
response = m_device.Client.Send(MCACommand.SetRepeat(1));
if (response == null)
{
throw new MCADeviceLostConnectionException();
}
}
return(true);
}
/// <summary>
/// Performs a single cycle assay operation.
/// </summary>
/// <param name="measurement">The measurement parameters needed for the op.</param>
/// <param name="cancellationToken">The cancellation token to observe.</param>
/// <exception cref="MCADeviceLostConnectionException">An error occurred communicating with the device.</exception>
/// <exception cref="MCADeviceBadDataException">An error occurred with the raw data stream state.</exception>
/// <exception cref="Exception">Empty or corrupt runtime data structure.</exception>
protected void PerformAssay(Measurement measurement, MeasTrackParams mparams, CancellationToken cancellationToken)
{
MCA527ProcessingState ps = (MCA527ProcessingState)(RDT.State);
Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.InvariantCulture;
try
{
if (ps == null)
{
throw new Exception("Big L bogus state"); // caught cleanly below
}
if (ps.writingFile && (ps.file == null || ps.file.writer == null))
{
m_logger.TraceEvent(LogLevels.Verbose, 9, "null");
}
ushort seq = mparams.seq;
m_logger.TraceEvent(LogLevels.Info, 0, "MCA527[{0}]: Started assay {1}", DeviceName, seq);
m_logger.Flush();
cancellationToken.ThrowIfCancellationRequested();
if (m_setvoltage)
{
SetVoltage(m_voltage, MaxSetVoltageTime, cancellationToken);
}
cancellationToken.ThrowIfCancellationRequested();
if (seq == 1) // init var on first cycle
{
ps.device = m_device;
}
bool x = InitSettings(seq, (uint)mparams.interval); // truncate for discrete integer result
Stopwatch stopwatch = new Stopwatch();
TimeSpan duration = TimeSpan.FromSeconds((uint)mparams.interval);
byte[] buffer = new byte[1024 * 1024];
// a5 5a 42 00 01 00 ae d5 44 56 b9 9b
// flags: 0x0001 => spectrum is cleared and a new start time is set
// start time: 0x5644d5ae => seconds since Dec 31, 1969, 16:00:00 GMT
uint secondsSinceEpoch = (uint)(Math.Abs(Math.Round((DateTime.UtcNow - MCADevice.MCA527EpochTime).TotalSeconds)));
MCAResponse response = m_device.Client.Send(MCACommand.Start(StartFlag.SpectrumClearedNewStartTime,
false, false, false, secondsSinceEpoch));
if (response == null)
{
throw new MCADeviceLostConnectionException();
}
const uint CommonMemoryBlockSize = 1440;
// what's the most that could be left over from a previous attempt to decode? => 3 bytes
byte[] rawBuffer = new byte[CommonMemoryBlockSize + 3];
ulong[] timestampsBuffer = new ulong[CommonMemoryBlockSize + 1];
uint commonMemoryReadIndex = 0;
uint rawBufferOffset = 0;
m_logger.TraceEvent(LogLevels.Verbose, 11901, "{0} start time for {1}", DateTime.Now.ToString(), seq);
ulong accumulatedTime = 0, totalEvents = 0;
int maxindex = 0;
TimeSpan elapsed = new TimeSpan(0);
stopwatch.Start();
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
QueryState527ExResponse qs527er = (QueryState527ExResponse)m_device.Client.Send(MCACommand.QueryState527Ex());
if (qs527er == null)
{
throw new MCADeviceLostConnectionException();
}
MCAState state = qs527er.MCAState;
// pull off some data while we are waiting...
uint commonMemoryFillLevel = qs527er.CommonMemoryFillLevel;
uint bytesAvailable = commonMemoryFillLevel - commonMemoryReadIndex;
elapsed = stopwatch.Elapsed; // snapshot
if (state != MCAState.Run && bytesAvailable == 0) // requested time is complete
{
break;
}
if ((elapsed = stopwatch.Elapsed) > duration) // elapsed time is complete
{
break;
}
if (bytesAvailable >= CommonMemoryBlockSize) // a full data block
{
QueryCommonMemoryResponse qcmr = (QueryCommonMemoryResponse)m_device.Client.Send(MCACommand.QueryCommonMemory(commonMemoryReadIndex / 2));
if (qcmr == null)
{
throw new MCADeviceLostConnectionException();
}
// bytesToCopy needs to always be even, so that commonMemoryReadIndex always stays even...
uint bytesToCopy = Math.Min(bytesAvailable / 2, CommonMemoryBlockSize / 2) * 2;
qcmr.CopyData(0, rawBuffer, (int)rawBufferOffset, (int)bytesToCopy);
if (ps.writingFile && ps.file != null && ps.file.writer != null) // write the block
{
ps.file.WriteTimestampsRawDataChunk(rawBuffer, 0, (int)bytesToCopy);
}
rawBufferOffset += bytesToCopy;
commonMemoryReadIndex += bytesToCopy;
uint timestampsCount = m_device.TransformRawData(rawBuffer, ref rawBufferOffset, timestampsBuffer);
// make sure rawBufferOffset is never greater than 3 after transforming data
// => means something has gone wrong
if (rawBufferOffset > 3)
{
throw new MCADeviceBadDataException();
}
// copy the data out...
if (timestampsCount > 0)
{
if (maxindex < RDT.State.maxValuesInBuffer) // accumulate
{
if (RDT.State.timeArray.Count < maxindex + timestampsCount)
{
RDT.State.timeArray.AddRange(new ulong[timestampsCount]);
}
for (int i = 0; i < timestampsCount; i++)
{
accumulatedTime += timestampsBuffer[i];
RDT.State.timeArray[maxindex] = accumulatedTime;
maxindex++; // always 1 more than the last index
}
RDT.State.NumValuesParsed += timestampsCount;
RDT.State.hitsPerChn[0] += timestampsCount;
RDT.State.NumTotalsEncountered = RDT.State.NumValuesParsed; // only one channel
}
else // process
{
long _max = RDT.State.NumValuesParsed;
if (_max < RDT.State.neutronEventArray.Count) // equalize the length of the empty neutron channel event list
{
RDT.State.neutronEventArray.RemoveRange((int)_max, RDT.State.neutronEventArray.Count - (int)_max);
}
else if (_max > RDT.State.neutronEventArray.Count)
{
RDT.State.neutronEventArray.AddRange(new uint[_max - RDT.State.neutronEventArray.Count]);
}
if (_max < RDT.State.timeArray.Count)
{
RDT.State.timeArray.RemoveRange((int)_max, RDT.State.timeArray.Count - (int)_max);
}
else if (_max > RDT.State.timeArray.Count)
{
RDT.State.timeArray.AddRange(new ulong[_max - RDT.State.timeArray.Count]);
}
m_logger.TraceEvent(LogLevels.Verbose, 88, "{0} {1} handling {2} timestampsCount {3} num", elapsed, duration, timestampsCount, RDT.State.NumValuesParsed);
RDT.PassBufferToTheCounters((int)_max);
maxindex = 0; totalEvents += RDT.State.NumTotalsEncountered;
RDT.StartNewBuffer();
}
}
}
else if (bytesAvailable > 0 && state != MCAState.Run)
{
// special case for when there's not a whole block left to read
// we can only read up to the address: CommonMemorySize - 1440
uint commonMemorySize = qs527er.CommonMemorySize;
uint readAddress = commonMemoryReadIndex;
uint readOffset = 0;
if (readAddress > commonMemorySize - 1440)
{
readOffset = readAddress - (commonMemorySize - 1440);
readAddress -= readOffset;
}
QueryCommonMemoryResponse qcmr = (QueryCommonMemoryResponse)m_device.Client.Send(MCACommand.QueryCommonMemory(readAddress / 2));
if (qcmr == null)
{
throw new MCADeviceLostConnectionException();
}
uint bytesToCopy = bytesAvailable;
qcmr.CopyData((int)readOffset, rawBuffer, (int)rawBufferOffset, (int)bytesToCopy);
if (ps.writingFile && ps.file != null && ps.file.writer != null) // write the block
{
ps.file.WriteTimestampsRawDataChunk(rawBuffer, (int)readOffset, (int)bytesToCopy);
}
rawBufferOffset += bytesToCopy;
commonMemoryReadIndex += bytesToCopy;
uint timestampsCount = m_device.TransformRawData(rawBuffer, ref rawBufferOffset, timestampsBuffer);
//if (rawBufferOffset > 0) {
// apparently this can happen. Perhaps when the device gets cut off (because of a timer event), right in the middle of writing?
//throw new MCADeviceBadDataException();
// an Engineer from GBS said we are running on a very old firmware version,
// perhaps that has something to do with it...
//}
if (timestampsCount > 0)
{
// copy the timestampsBuffer value into the RDT.State.timeArray, Q: wait to fill a much large internal buffer before calling the transform?
if (maxindex < RDT.State.maxValuesInBuffer) // accumulate
{
if (RDT.State.timeArray.Count < maxindex + timestampsCount)
{
RDT.State.timeArray.AddRange(new ulong[timestampsCount]);
}
for (int i = 0; i < timestampsCount; i++)
{
accumulatedTime += timestampsBuffer[i];
RDT.State.timeArray[maxindex] = accumulatedTime;
maxindex++; // always 1 more than the last index
}
RDT.State.NumValuesParsed += timestampsCount;
RDT.State.hitsPerChn[0] += timestampsCount;
RDT.State.NumTotalsEncountered = RDT.State.NumValuesParsed; // only one channel
}
else // process
{
long _max = RDT.State.NumValuesParsed;
if (_max < RDT.State.neutronEventArray.Count) // equalize the length of the empty neutron channel event list
{
RDT.State.neutronEventArray.RemoveRange((int)_max, RDT.State.neutronEventArray.Count - (int)_max);
}
else if (_max > RDT.State.neutronEventArray.Count)
{
RDT.State.neutronEventArray.AddRange(new uint[_max - RDT.State.neutronEventArray.Count]);
}
if (_max < RDT.State.timeArray.Count)
{
RDT.State.timeArray.RemoveRange((int)_max, RDT.State.timeArray.Count - (int)_max);
}
else if (_max > RDT.State.timeArray.Count)
{
RDT.State.timeArray.AddRange(new ulong[_max - RDT.State.timeArray.Count]);
}
m_logger.TraceEvent(LogLevels.Verbose, 89, "{0} {1} handling {2} timestampsCount {3} num", elapsed, duration, timestampsCount, RDT.State.NumValuesParsed);
RDT.PassBufferToTheCounters((int)_max);
maxindex = 0; totalEvents += RDT.State.NumTotalsEncountered;
RDT.StartNewBuffer();
}
}
}
else
{
// give the device a break, not needed now because PassBufferToTheCounters processing takes time
//Thread.Sleep(40); // 100? ms
//m_logger.TraceEvent(LogLevels.Verbose, 99899, "{0} {1} handling {2} timestampsCount {3} num", elapsed, duration, 0, RDT.State.NumValuesParsed);
}
elapsed = stopwatch.Elapsed; // snapshot the time after the processing and before the next query
if (maxindex > 0) // accumulated data was not completely processed above, so it happens here
{
long _max = RDT.State.NumValuesParsed;
if (_max < RDT.State.neutronEventArray.Count) // equalize the length of the empty neutron channel event list
{
RDT.State.neutronEventArray.RemoveRange((int)_max, RDT.State.neutronEventArray.Count - (int)_max);
}
else if (_max > RDT.State.neutronEventArray.Count)
{
RDT.State.neutronEventArray.AddRange(new uint[_max - RDT.State.neutronEventArray.Count]);
}
if (_max < RDT.State.timeArray.Count)
{
RDT.State.timeArray.RemoveRange((int)_max, RDT.State.timeArray.Count - (int)_max);
}
else if (_max > RDT.State.timeArray.Count)
{
RDT.State.timeArray.AddRange(new ulong[_max - RDT.State.timeArray.Count]);
}
m_logger.TraceEvent(LogLevels.Verbose, 90, "{0} {1} handling {2} num", elapsed, duration, RDT.State.NumValuesParsed);
RDT.PassBufferToTheCounters((int)_max);
maxindex = 0; totalEvents += RDT.State.NumTotalsEncountered;
RDT.StartNewBuffer();
}
} // while time elapsed is less than requested time
stopwatch.Stop();
m_logger.TraceEvent(LogLevels.Verbose, 11901, "{0} stop time for {1}", DateTime.Now.ToString(), seq);
m_logger.TraceEvent(LogLevels.Info, 0, "MCA527[{0}]: Finished assay; read {1} events in {2}s for {3}", DeviceName, totalEvents, stopwatch.Elapsed.TotalSeconds, seq);
m_logger.Flush();
RDT.Cycle.HighVoltage = m_device.GetHighVoltage();
if (ps.writingFile)
{
m_device.CreateWriteHeaderAndClose(ps.file);
m_logger.TraceEvent(LogLevels.Verbose, 11921, "WriteHeader for {0}", seq);
m_logger.Flush();
}
lock (m_monitor)
{
m_cancellationTokenSource.Dispose();
m_cancellationTokenSource = null;
}
if (totalEvents == 0) // nothing to handle if no events, close up and continue
{
DAQControl.HandleEndOfCycleProcessing(this, new StreamStatusBlock(@"MCA527 Done"));
m_logger.TraceEvent(LogLevels.Verbose, 11911, "HandleEndOfCycle for {0}", seq);
m_logger.Flush();
}
}
catch (OperationCanceledException)
{
m_logger.TraceEvent(LogLevels.Warning, 767, "MCA527[{0}]: Stopping assay", DeviceName);
m_logger.Flush();
DAQControl.StopActiveAssayImmediately();
throw;
}
catch (Exception ex)
{
m_logger.TraceEvent(LogLevels.Error, 0, "MCA527[{0}]: Error during assay: {1}", DeviceName, ex.Message);
m_logger.TraceException(ex, true);
m_logger.Flush();
DAQControl.HandleFatalGeneralError(this, ex);
throw;
}
finally
{
}
}
