public DataPackageScope GetScopeData()
{
//Sleep to simulate USB delay
System.Threading.Thread.Sleep(usbLatency);
TimeSpan timeOffset = DateTime.Now - timeOrigin;
if (acquisitionRunning)
{
lock (viewportUpdateLock)
{
viewportUpdate = true;
}
int triggerHoldoffInSamples = 0;
int triggerIndex = 0;
Dictionary <AnalogChannel, List <float> > waveAnalog = new Dictionary <AnalogChannel, List <float> >();
foreach (AnalogChannel ch in AnalogChannel.List)
{
waveAnalog.Add(ch, new List <float>((int)waveLength));
}
List <byte> waveDigital = new List <byte>();
bool triggerDetected = false;
while (true)
{
AcquisitionMode AcquisitionModeCurrent;
lock (acquisitionSettingsLock)
{
acquisitionBufferAnalog = new Dictionary <AnalogChannel, float[]>();
AcquisitionModeCurrent = acquisitionMode;
acquisitionDepthCurrent = AcquisitionDepth;
TriggerHoldoffCurrent = triggerHoldoff;
SamplePeriodCurrent = SamplePeriod;
waveLengthCurrent = waveLength;
logicAnalyserChannelCurrent = logicAnalyserChannel;
logicAnalyserEnabledCurrent = LogicAnalyserEnabled;
}
acquistionId++;
//Stop trying to find a trigger at some point to avoid running out of memory
if (waveAnalog.Where(x => x.Value.Count > GENERATION_LENGTH_MAX).Count() > 0 || waveDigital.Count > GENERATION_LENGTH_MAX)
{
System.Threading.Thread.Sleep(10);
return(null);
}
foreach (AnalogChannel channel in AnalogChannel.List)
{
if (logicAnalyserEnabledCurrent && channel == logicAnalyserChannelCurrent)
{
continue;
}
float[] wave;
switch (waveSource)
{
case WaveSource.GENERATOR:
wave = DummyScope.GenerateWave(waveLengthCurrent,
SamplePeriodCurrent,
timeOffset.Ticks / 1e7,
ChannelConfig[channel]);
break;
case WaveSource.FILE:
wave = GetWaveFromFile(channel, waveLengthCurrent, SamplePeriodCurrent, timeOffset.Ticks / 1e7);
break;
default:
throw new Exception("Unsupported wavesource");
}
if (ChannelConfig[channel].coupling == Coupling.AC)
{
DummyScope.RemoveDcComponent(ref wave, ChannelConfig[channel].frequency, SamplePeriodCurrent);
}
else
{
DummyScope.AddDcComponent(ref wave, (float)ChannelConfig[channel].dcOffset);
}
DummyScope.AddNoise(wave, ChannelConfig[channel].noise);
waveAnalog[channel].AddRange(wave);
}
if (logicAnalyserEnabledCurrent)
{
waveDigital.AddRange(DummyScope.GenerateWaveDigital(waveLengthCurrent, SamplePeriodCurrent, timeOffset.TotalSeconds));
}
triggerHoldoffInSamples = (int)(TriggerHoldoffCurrent / SamplePeriodCurrent);
double triggerTimeout = 0.0;
if (AcquisitionModeCurrent == AcquisitionMode.AUTO)
{
triggerTimeout = GENERATION_LENGTH_MAX * SamplePeriodCurrent; //Give up after 10ms
}
if (logicAnalyserEnabledCurrent && this.triggerValue.mode == TriggerMode.Digital)
{
triggerDetected = DummyScope.DoTriggerDigital(waveDigital.ToArray(), triggerHoldoffInSamples, digitalTrigger, acquisitionDepthCurrent, out triggerIndex);
}
else
{
if (triggerValue.source != TriggerSource.Channel)
{
throw new Exception("Doing analog trigger but mode is not set to analog!");
}
triggerDetected = DummyScope.DoTriggerAnalog(waveAnalog[triggerValue.channel].ToArray(), triggerValue,
triggerHoldoffInSamples, triggerThreshold, triggerWidth,
acquisitionDepthCurrent, out triggerIndex);
}
awaitingTrigger = !triggerDetected;
if (triggerDetected)
{
forceTrigger = false;
awaitingTrigger = false;
break;
}
if (
forceTrigger ||
(triggerTimeout > 0 && waveAnalog[AnalogChannel.ChA].Count * SamplePeriodCurrent >= triggerTimeout)
)
{
forceTrigger = false;
triggerIndex = triggerHoldoffInSamples;
awaitingTrigger = false;
break;
}
var timePassed = new TimeSpan((long)(waveLengthCurrent * SamplePeriodCurrent * 1e7));
timeOffset = timeOffset.Add(timePassed);
}
foreach (AnalogChannel channel in AnalogChannel.List)
{
if (logicAnalyserEnabledCurrent && channel == logicAnalyserChannelCurrent)
{
continue;
}
acquisitionBufferAnalog[channel] = DummyScope.CropWave(acquisitionDepthCurrent, waveAnalog[channel].ToArray(), triggerIndex, triggerHoldoffInSamples);
}
acquisitionBufferDigital = DummyScope.CropWave(acquisitionDepthCurrent, waveDigital.ToArray(), triggerIndex, triggerHoldoffInSamples);
if (StopPending)
{
acquisitionRunning = false;
}
}
lock (viewportUpdateLock)
{
if (!viewportUpdate)
{
return(null);
}
viewportUpdate = false;
}
if (acquisitionBufferAnalog.Count == null)
{
return(null);
}
//Decrease the number of samples till viewport sample period is larger than
//or equal to the full sample rate
uint samples = VIEWPORT_SAMPLES_MAX;
int viewportDecimation = 0;
while (true)
{
viewportDecimation = (int)Math.Ceiling(Math.Log(ViewPortTimeSpan / (samples + 2) / SamplePeriodCurrent, 2));
if (viewportDecimation >= 0)
{
break;
}
samples /= 2;
}
if (viewportDecimation > VIEW_DECIMATION_MAX)
{
Logger.Warn("Clipping view decimation! better decrease the sample rate!");
viewportDecimation = VIEW_DECIMATION_MAX;
}
int viewportSamples = (int)(ViewPortTimeSpan / (SamplePeriodCurrent * Math.Pow(2, viewportDecimation))) + 2;
int viewportOffsetLocal = (int)(ViewPortOffset / SamplePeriodCurrent);
p = new DataPackageScope(this.GetType(),
acquisitionDepthCurrent, SamplePeriodCurrent,
viewportSamples, (Int64)(ViewPortOffset / SamplePeriodCurrent),
TriggerHoldoffCurrent, (Int64)(TriggerHoldoffCurrent / SamplePeriodCurrent), false, acquistionId, TriggerValue);
p.FullAcquisitionFetchProgress = 1f;
p.samplePeriod[ChannelDataSourceScope.Viewport] = SamplePeriodCurrent * Math.Pow(2, viewportDecimation);
p.offset[ChannelDataSourceScope.Viewport] = ViewPortOffset;
foreach (AnalogChannel ch in AnalogChannel.List)
{
if (logicAnalyserEnabledCurrent && ch == logicAnalyserChannelCurrent)
{
continue;
}
if (SendOverviewBuffer)
{
p.SetData(ChannelDataSourceScope.Overview, ch, GetViewport(acquisitionBufferAnalog[ch], 0, (int)(Math.Log(acquisitionDepthCurrent / OVERVIEW_LENGTH, 2)), OVERVIEW_LENGTH));
}
p.SetData(ChannelDataSourceScope.Viewport, ch, GetViewport(acquisitionBufferAnalog[ch], viewportOffsetLocal, viewportDecimation, viewportSamples));
p.SetData(ChannelDataSourceScope.Acquisition, ch, acquisitionBufferAnalog[ch]);
//set dummy minmax values
p.SaturationLowValue[ch] = float.MinValue;
p.SaturationHighValue[ch] = float.MaxValue;
}
if (logicAnalyserEnabledCurrent)
{
if (SendOverviewBuffer)
{
p.SetData(ChannelDataSourceScope.Overview, LogicAnalyserChannel.LA, GetViewport(acquisitionBufferDigital, 0, (int)(Math.Log(acquisitionDepthCurrent / OVERVIEW_LENGTH, 2)), OVERVIEW_LENGTH));
}
p.SetData(ChannelDataSourceScope.Viewport, LogicAnalyserChannel.LA, GetViewport(acquisitionBufferDigital, viewportOffsetLocal, viewportDecimation, viewportSamples));
p.SetData(ChannelDataSourceScope.Acquisition, LogicAnalyserChannel.LA, acquisitionBufferDigital);
}
if (acquisitionMode == AcquisitionMode.SINGLE)
{
acquisitionRunning = false;
}
return(p);
}
public DataPackageScope GetScopeData()
{
//Sleep to simulate USB delay
System.Threading.Thread.Sleep(usbLatency);
TimeSpan timeOffset = DateTime.Now - timeOrigin;
List <AnalogChannel> channelsToAcquireDataFor = new List <AnalogChannel> ();
if (isAudio)
{
channelsToAcquireDataFor.Add(AnalogChannel.ChA);
}
else
{
channelsToAcquireDataFor.AddRange(AnalogChannel.List);
}
if (acquisitionRunning)
{
lock (viewportUpdateLock)
{
viewportUpdate = true;
}
int triggerHoldoffInSamples = 0;
int triggerIndex = 0;
Dictionary <AnalogChannel, List <float> > waveAnalog = new Dictionary <AnalogChannel, List <float> >();
foreach (AnalogChannel ch in AnalogChannel.List)
{
waveAnalog.Add(ch, new List <float>((int)waveLength));
}
List <byte> waveDigital = new List <byte>();
bool triggerDetected = false;
//loop until trigger condition is met
while (true)
{
//in case the stop button has been pressed, this section makes sure the last-shown acquisition is kept on the display (otherwise it is replaced by a new acquisition)
if ((StopPending || !acquisitionRunning) && (lastCommittedDataPackage != null))
{
acquisitionRunning = false;
return(lastCommittedDataPackage);
}
AcquisitionMode AcquisitionModeCurrent;
lock (acquisitionSettingsLock)
{
acquisitionBufferAnalog = new Dictionary <AnalogChannel, float[]>();
AcquisitionModeCurrent = acquisitionMode;
acquisitionDepthCurrent = AcquisitionDepth;
TriggerHoldoffCurrent = triggerHoldoff;
SamplePeriodCurrent = SamplePeriod;
waveLengthCurrent = waveLength;
logicAnalyserChannelCurrent = logicAnalyserChannel;
logicAnalyserEnabledCurrent = LogicAnalyserEnabled;
}
acquistionId++;
//Stop trying to find a trigger at some point to avoid running out of memory
if (waveAnalog.Where(x => x.Value.Count > GENERATION_LENGTH_MAX).Count() > 0 || waveDigital.Count > GENERATION_LENGTH_MAX)
{
System.Threading.Thread.Sleep(10);
return(null);
}
foreach (AnalogChannel channel in channelsToAcquireDataFor)
{
if (logicAnalyserEnabledCurrent && channel == logicAnalyserChannelCurrent)
{
continue;
}
float[] wave;
if (HardwareInterface == DummyInterface.Generator)
{
wave = DummyScope.GenerateWave(waveLengthCurrent,
SamplePeriodCurrent,
timeOffset.Ticks / 1e7,
ChannelConfig[channel]);
}
else if (HardwareInterface == DummyInterface.File)
{
wave = GetWaveFromFile(channel, waveLengthCurrent, SamplePeriodCurrent, timeOffset.Ticks / 1e7);
}
#if ANDROID
else if (hardwareInterface == DummyInterface.Audio)
{
//fetch audio data
if (audioJack == null)
{
return(null);
}
byte[] audioData = new byte[audioBufferLengthInBytes];
int bytesRead = audioJack.Read(audioData, 0, audioBufferLengthInBytes); //2 bytes per sample
int watchdog = 0;
while (bytesRead <= 0 && watchdog++ < 1000)
{
System.Threading.Thread.Sleep(1);
bytesRead = audioJack.Read(audioData, 0, audioBufferLengthInBytes); //2 bytes per sample
}
//convert bytes to shorts
short[] sampleData = new short[audioData.Length / 2];
Buffer.BlockCopy(audioData, 0, sampleData, 0, sampleData.Length * 2);
//and then into floats
wave = new float[sampleData.Length];
for (int i = 0; i < wave.Length; i++)
{
wave [i] = (float)sampleData [i] / (float)short.MaxValue;
}
//in case of large zoomouts, decimation will be > 0
//FIXME: this is not the best location to do this. time-errors will accumulate. better to do this on eventual wave. but then trigger index etc needs to be adjusted
int skip = 1 << (int)decimation;
wave = wave.Where((x, i) => i % skip == 0).ToArray();
}
#endif
else
{
throw new Exception("Unsupported dummy interface");
}
//coupling, noise injection in SW
if (!isAudio)
{
if (ChannelConfig [channel].coupling == Coupling.AC)
{
DummyScope.RemoveDcComponent(ref wave, ChannelConfig [channel].frequency, SamplePeriodCurrent);
}
else
{
DummyScope.AddDcComponent(ref wave, (float)ChannelConfig [channel].dcOffset);
}
DummyScope.AddNoise(wave, ChannelConfig [channel].noise);
}
waveAnalog[channel].AddRange(wave);
}
if (!isAudio && logicAnalyserEnabledCurrent)
{
waveDigital.AddRange(DummyScope.GenerateWaveDigital(waveLengthCurrent, SamplePeriodCurrent, timeOffset.TotalSeconds));
}
triggerHoldoffInSamples = (int)(TriggerHoldoffCurrent / SamplePeriodCurrent);
double triggerTimeout = 0.0;
if (AcquisitionModeCurrent == AcquisitionMode.AUTO)
{
triggerTimeout = SamplePeriodCurrent * acquisitionDepthCurrent * 1.0; //Give up after twice the acqbuffer timespan
}
//detect digital trigger
if (logicAnalyserEnabledCurrent && this.triggerValue.mode == TriggerMode.Digital)
{
triggerDetected = DummyScope.DoTriggerDigital(waveDigital.ToArray(), triggerHoldoffInSamples, digitalTrigger, acquisitionDepthCurrent, out triggerIndex);
if (isAudio)
{
triggerDetected = false;
}
}
else
//detect analog trigger
{
if (triggerValue.source == TriggerSource.External)
{
triggerDetected = false;
}
triggerDetected = DummyScope.DoTriggerAnalog(waveAnalog[triggerValue.channel].ToArray(), triggerValue,
triggerHoldoffInSamples, triggerThreshold, triggerWidth,
acquisitionDepthCurrent, out triggerIndex);
}
awaitingTrigger = !triggerDetected;
//break out of while loop if trigger was detected
if (triggerDetected)
{
forceTrigger = false;
awaitingTrigger = false;
break;
}
//break out of while loop if triggerWasForced or synthetical 10ms limit was reached
if (
forceTrigger ||
(triggerTimeout > 0 && waveAnalog[AnalogChannel.ChA].Count * SamplePeriodCurrent >= triggerTimeout)
)
{
forceTrigger = false;
triggerIndex = triggerHoldoffInSamples;
awaitingTrigger = false;
break;
}
//keep track of time of first samplemoment
var timePassed = new TimeSpan((long)(waveLengthCurrent * SamplePeriodCurrent * 1e7));
timeOffset = timeOffset.Add(timePassed);
}
//crop wave to only displayable part and store in buffer
foreach (AnalogChannel channel in channelsToAcquireDataFor)
{
if (logicAnalyserEnabledCurrent && channel == logicAnalyserChannelCurrent)
{
continue;
}
acquisitionBufferAnalog[channel] = DummyScope.CropWave(acquisitionDepthCurrent, waveAnalog[channel].ToArray(), triggerIndex, triggerHoldoffInSamples);
}
acquisitionBufferDigital = DummyScope.CropWave(acquisitionDepthCurrent, waveDigital.ToArray(), triggerIndex, triggerHoldoffInSamples);
if (StopPending)
{
acquisitionRunning = false;
}
}
lock (viewportUpdateLock)
{
if (!viewportUpdate)
{
return(null);
}
viewportUpdate = false;
}
if (acquisitionBufferAnalog.Count == 0)
{
return(null);
}
//Decrease the number of samples till viewport sample period is larger than
//or equal to the full sample rate
uint samples = VIEWPORT_SAMPLES_MAX;
int viewportDecimation = 0;
while (true)
{
viewportDecimation = (int)Math.Ceiling(Math.Log(ViewPortTimeSpan / (samples + 2) / SamplePeriodCurrent, 2));
if (viewportDecimation >= 0)
{
break;
}
samples /= 2;
}
if (viewportDecimation > VIEW_DECIMATION_MAX)
{
Logger.Warn("Clipping view decimation! better decrease the sample rate!");
viewportDecimation = VIEW_DECIMATION_MAX;
}
int viewportSamples = (int)(ViewPortTimeSpan / (SamplePeriodCurrent * Math.Pow(2, viewportDecimation))) + 2;
int viewportOffsetLocal = (int)(ViewPortOffset / SamplePeriodCurrent);
p = new DataPackageScope(this.GetType(),
acquisitionDepthCurrent, SamplePeriodCurrent,
viewportSamples, (Int64)(ViewPortOffset / SamplePeriodCurrent),
TriggerHoldoffCurrent, (Int64)(TriggerHoldoffCurrent / SamplePeriodCurrent), false, acquistionId, TriggerValue);
p.FullAcquisitionFetchProgress = 1f;
p.samplePeriod[ChannelDataSourceScope.Viewport] = SamplePeriodCurrent * Math.Pow(2, viewportDecimation);
p.offset[ChannelDataSourceScope.Viewport] = ViewPortOffset;
//set values, needed for ETS to work properly
if (acquisitionBufferAnalog != null && acquisitionBufferAnalog.ContainsKey(AnalogChannel.ChA))
{
p.samplePeriod[ChannelDataSourceScope.Overview] = SamplePeriodCurrent * (float)acquisitionBufferAnalog[AnalogChannel.ChA].Length / (float)OVERVIEW_LENGTH;
p.offset[ChannelDataSourceScope.Overview] = 0;
}
if (acquisitionBufferAnalog.Count == 0)
{
return(lastCommittedDataPackage);
}
foreach (AnalogChannel ch in channelsToAcquireDataFor)
{
if (logicAnalyserEnabledCurrent && ch == logicAnalyserChannelCurrent)
{
continue;
}
if (SendOverviewBuffer)
{
Array arr = GetViewport(acquisitionBufferAnalog[ch], 0, (int)(Math.Log(acquisitionDepthCurrent / OVERVIEW_LENGTH, 2)), OVERVIEW_LENGTH);
p.SetData(ChannelDataSourceScope.Overview, ch, arr);
}
p.SetData(ChannelDataSourceScope.Viewport, ch, GetViewport(acquisitionBufferAnalog[ch], viewportOffsetLocal, viewportDecimation, viewportSamples));
p.SetData(ChannelDataSourceScope.Acquisition, ch, acquisitionBufferAnalog[ch]);
//set dummy minmax values
p.SaturationLowValue[ch] = float.MinValue;
p.SaturationHighValue[ch] = float.MaxValue;
//set 20mV as resolution, which is needed for some processors (like freqdetection). Don't go too low, as ETS uses this in its difference detector
p.Resolution[ch] = 0.020f;
}
if (logicAnalyserEnabledCurrent)
{
if (SendOverviewBuffer)
{
p.SetData(ChannelDataSourceScope.Overview, LogicAnalyserChannel.LA, GetViewport(acquisitionBufferDigital, 0, (int)(Math.Log(acquisitionDepthCurrent / OVERVIEW_LENGTH, 2)), OVERVIEW_LENGTH));
}
p.SetData(ChannelDataSourceScope.Viewport, LogicAnalyserChannel.LA, GetViewport(acquisitionBufferDigital, viewportOffsetLocal, viewportDecimation, viewportSamples));
p.SetData(ChannelDataSourceScope.Acquisition, LogicAnalyserChannel.LA, acquisitionBufferDigital);
}
if (acquisitionMode == AcquisitionMode.SINGLE)
{
acquisitionRunning = false;
}
lastCommittedDataPackage = p;
return(p);
}