First DSO-2250 support attempt

oliverhaag
1 parent bff9d5ae
Showing 13 changed files with 1160 additions and 525 deletions
openhantek/ChangeLog
openhantek/src/dataanalyzer.cpp
openhantek/src/dataanalyzer.h
openhantek/src/dso.h
openhantek/src/dsocontrol.h
openhantek/src/dsowidget.cpp
openhantek/src/dsowidget.h
openhantek/src/hantek/control.cpp
openhantek/src/hantek/control.h
openhantek/src/hantek/types.cpp
openhantek/src/hantek/types.h
openhantek/src/openhantek.cpp
openhantek/src/openhantek.h
@@ -143,3 +143,7 @@
 2012-09-01 Oliver Haag  <oliver.haag@gmail.com>
 * Updated documentation with first DSO-2250 details
 * General documentation improvements
+
+2012-09-01 Oliver Haag  <oliver.haag@gmail.com>
+* First attempt to add DSO-2250 support
+* More documentation updates
@@ -45,7 +45,7 @@
 DataAnalyzer::DataAnalyzer(DsoSettings *settings, QObject *parent) : QThread(parent) {
 	this->settings = settings;
-	this->lastBufferSize = 0;
+	this->lastRecordLength = 0;
 	this->lastWindow = (Dso::WindowFunction) -1;
 	this->window = 0;
@@ -189,33 +189,33 @@ void DataAnalyzer::run() {
 	for(int channel = 0; channel < this->analyzedData.count(); channel++) {
 		if(this->analyzedData[channel]->samples.voltage.sample) {
 			// Calculate new window
-			if(this->lastWindow != this->settings->scope.spectrumWindow || this->lastBufferSize != this->analyzedData[channel]->samples.voltage.count) {
-				if(this->lastBufferSize != this->analyzedData[channel]->samples.voltage.count) {
-					this->lastBufferSize = this->analyzedData[channel]->samples.voltage.count;
+			if(this->lastWindow != this->settings->scope.spectrumWindow || this->lastRecordLength != this->analyzedData[channel]->samples.voltage.count) {
+				if(this->lastRecordLength != this->analyzedData[channel]->samples.voltage.count) {
+					this->lastRecordLength = this->analyzedData[channel]->samples.voltage.count;
 					if(this->window)
 						fftw_free(this->window);
-					this->window = (double *) fftw_malloc(sizeof(double) * this->lastBufferSize);
+					this->window = (double *) fftw_malloc(sizeof(double) * this->lastRecordLength);
 				}
-				unsigned int windowEnd = this->lastBufferSize - 1;
+				unsigned int windowEnd = this->lastRecordLength - 1;
 				this->lastWindow = this->settings->scope.spectrumWindow;
 				switch(this->settings->scope.spectrumWindow) {
 					case Dso::WINDOW_HAMMING:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.54 - 0.46 * cos(2.0 * M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_HANN:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.5 * (1.0 - cos(2.0 * M_PI * windowPosition / windowEnd));
 						break;
 					case Dso::WINDOW_COSINE:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = sin(M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_LANCZOS:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++) {
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++) {
 							double sincParameter = (2.0 * windowPosition / windowEnd - 1.0) * M_PI;
 							if(sincParameter == 0)
 								*(this->window + windowPosition) = 1;
@@ -224,55 +224,55 @@ void DataAnalyzer::run() {
 						}
 						break;
 					case Dso::WINDOW_BARTLETT:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 2.0 / windowEnd * (windowEnd / 2 - abs(windowPosition - windowEnd / 2));
 						break;
 					case Dso::WINDOW_TRIANGULAR:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
-							*(this->window + windowPosition) = 2.0 / this->lastBufferSize * (this->lastBufferSize / 2 - abs(windowPosition - windowEnd / 2));
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
+							*(this->window + windowPosition) = 2.0 / this->lastRecordLength * (this->lastRecordLength / 2 - abs(windowPosition - windowEnd / 2));
 						break;
 					case Dso::WINDOW_GAUSS:
 						{
 							double sigma = 0.4;
-							for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+							for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 								*(this->window + windowPosition) = exp(-0.5 * pow(((windowPosition - windowEnd / 2) / (sigma * windowEnd / 2)), 2));
 						}
 						break;
 					case Dso::WINDOW_BARTLETTHANN:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.62 - 0.48 * abs(windowPosition / windowEnd - 0.5) - 0.38 * cos(2.0 * M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_BLACKMAN:
 						{
 							double alpha = 0.16;
-							for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+							for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 								*(this->window + windowPosition) = (1 - alpha) / 2 - 0.5 * cos(2.0 * M_PI * windowPosition / windowEnd) + alpha / 2 * cos(4.0 * M_PI * windowPosition / windowEnd);
 						}
 						break;
 					//case WINDOW_KAISER:
 						// TODO
 						//double alpha = 3.0;
-						//for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						//for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							//*(this->window + windowPosition) = ;
 						//break;
 					case Dso::WINDOW_NUTTALL:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.355768 - 0.487396 * cos(2 * M_PI * windowPosition / windowEnd) + 0.144232 * cos(4 * M_PI * windowPosition / windowEnd) - 0.012604 * cos(6 * M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_BLACKMANHARRIS:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.35875 - 0.48829 * cos(2 * M_PI * windowPosition / windowEnd) + 0.14128 * cos(4 * M_PI * windowPosition / windowEnd) - 0.01168 * cos(6 * M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_BLACKMANNUTTALL:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 0.3635819 - 0.4891775 * cos(2 * M_PI * windowPosition / windowEnd) + 0.1365995 * cos(4 * M_PI * windowPosition / windowEnd) - 0.0106411 * cos(6 * M_PI * windowPosition / windowEnd);
 						break;
 					case Dso::WINDOW_FLATTOP:
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 1.0 - 1.93 * cos(2 * M_PI * windowPosition / windowEnd) + 1.29 * cos(4 * M_PI * windowPosition / windowEnd) - 0.388 * cos(6 * M_PI * windowPosition / windowEnd) + 0.032 * cos(8 * M_PI * windowPosition / windowEnd);
 						break;
 					default: // Dso::WINDOW_RECTANGULAR
-						for(unsigned int windowPosition = 0; windowPosition < this->lastBufferSize; windowPosition++)
+						for(unsigned int windowPosition = 0; windowPosition < this->lastRecordLength; windowPosition++)
 							*(this->window + windowPosition) = 1.0;
 				}
 			}
@@ -297,7 +297,7 @@ void DataAnalyzer::run() {
 				windowedValues[position] = this->window[position] * this->analyzedData[channel]->samples.voltage.sample[position];
 			// Do discrete real to half-complex transformation
-			/// \todo Check if buffer size is multiple of 2
+			/// \todo Check if record length is multiple of 2
 			/// \todo Reuse plan and use FFTW_MEASURE to get fastest algorithm
 			fftw_plan fftPlan = fftw_plan_r2r_1d(this->analyzedData[channel]->samples.voltage.count, windowedValues, this->analyzedData[channel]->samples.spectrum.sample, FFTW_R2HC, FFTW_ESTIMATE);
 			fftw_execute(fftPlan);
@@ -89,8 +89,8 @@ class DataAnalyzer : public QThread {
 		QList<AnalyzedData *> analyzedData; ///< The analyzed data for each channel
 		QMutex *analyzedDataMutex; ///< A mutex for the analyzed data of all channels
-		unsigned long int lastBufferSize; ///< The buffer size of the previously analyzed data
-		unsigned long int maxSamples; ///< The maximum buffer size of the analyzed data
+		unsigned long int lastRecordLength; ///< The record length of the previously analyzed data
+		unsigned long int maxSamples; ///< The maximum record length of the analyzed data
 		Dso::WindowFunction lastWindow; ///< The previously used dft window function
 		double *window; ///< The array for the dft window factors
@@ -38,6 +38,16 @@
 /// \brief All DSO specific things for different modes and so on.
 namespace Dso {
 	//////////////////////////////////////////////////////////////////////////////
+	/// \enum ErrorCode                                           hantek/control.h
+	/// \brief The return codes for device control methods.
+	enum ErrorCode {
+		ERROR_NONE = 0, ///< Successful operation
+		ERROR_CONNECTION = -1, ///< Device not connected or communication error
+		ERROR_UNSUPPORTED = -2, ///< Not supported by this device
+		ERROR_PARAMETER = -3 ///< Parameter out of range
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \enum ChannelMode                                                    dso.h
 	/// \brief The channel display modes.
 	enum ChannelMode {
@@ -72,13 +72,13 @@ class DsoControl : public QThread {
 		virtual void stopSampling();
 		virtual unsigned long int setSamplerate(unsigned long int samplerate) = 0; ///< Set the samplerate that should be met
-		virtual unsigned long int setBufferSize(unsigned long int size) = 0; ///< Set the needed buffer size
+		virtual unsigned long int setRecordLength(unsigned long int size) = 0; ///< Set the required record length
 		virtual int setTriggerMode(Dso::TriggerMode mode) = 0; ///< Set the trigger mode
 		virtual int setTriggerSource(bool special, unsigned int id) = 0; ///< Set the trigger source
 		virtual double setTriggerLevel(unsigned int channel, double level) = 0; ///< Set the trigger level for a channel
 		virtual int setTriggerSlope(Dso::Slope slope) = 0; ///< Set the slope that causes triggering
-		virtual double setTriggerPosition(double position) = 0; ///< Set the pretrigger position (0.0 = left, 1.0 = right side)
+		virtual double setPretriggerPosition(double position) = 0; ///< Set the pretrigger position (0.0 = left, 1.0 = right side)
 		virtual int setChannelUsed(unsigned int channel, bool used) = 0; ///< Enable/disable a channel
 		virtual int setCoupling(unsigned int channel, Dso::Coupling coupling) = 0; ///< Set the coupling for a channel
@@ -114,12 +114,12 @@ DsoWidget::DsoWidget(DsoSettings *settings, DataAnalyzer *dataAnalyzer, QWidget 
 	// The table for the settings
 	this->settingsTriggerLabel = new QLabel();
 	this->settingsTriggerLabel->setMinimumWidth(160);
-	this->settingsBufferLabel = new QLabel();
-	this->settingsBufferLabel->setAlignment(Qt::AlignRight);
-	this->settingsBufferLabel->setPalette(palette);
-	this->settingsRateLabel = new QLabel();
-	this->settingsRateLabel->setAlignment(Qt::AlignRight);
-	this->settingsRateLabel->setPalette(palette);
+	this->settingsRecordLengthLabel = new QLabel();
+	this->settingsRecordLengthLabel->setAlignment(Qt::AlignRight);
+	this->settingsRecordLengthLabel->setPalette(palette);
+	this->settingsSamplerateLabel = new QLabel();
+	this->settingsSamplerateLabel->setAlignment(Qt::AlignRight);
+	this->settingsSamplerateLabel->setPalette(palette);
 	this->settingsTimebaseLabel = new QLabel();
 	this->settingsTimebaseLabel->setAlignment(Qt::AlignRight);
 	this->settingsTimebaseLabel->setPalette(palette);
@@ -128,8 +128,8 @@ DsoWidget::DsoWidget(DsoSettings *settings, DataAnalyzer *dataAnalyzer, QWidget 
 	this->settingsFrequencybaseLabel->setPalette(palette);
 	this->settingsLayout = new QHBoxLayout();
 	this->settingsLayout->addWidget(this->settingsTriggerLabel);
-	this->settingsLayout->addWidget(this->settingsBufferLabel, 1);
-	this->settingsLayout->addWidget(this->settingsRateLabel, 1);
+	this->settingsLayout->addWidget(this->settingsRecordLengthLabel, 1);
+	this->settingsLayout->addWidget(this->settingsSamplerateLabel, 1);
 	this->settingsLayout->addWidget(this->settingsTimebaseLabel, 1);
 	this->settingsLayout->addWidget(this->settingsFrequencybaseLabel, 1);
@@ -225,7 +225,7 @@ DsoWidget::DsoWidget(DsoSettings *settings, DataAnalyzer *dataAnalyzer, QWidget 
 	// Apply settings and update measured values
 	this->updateTriggerDetails();
-	this->updateBufferSize(this->settings->scope.horizontal.samples);
+	this->updateRecordLength(this->settings->scope.horizontal.samples);
 	this->updateFrequencybase();
 	this->updateTimebase();
 	this->updateZoom(this->settings->view.zoom);
@@ -246,7 +246,7 @@ DsoWidget::DsoWidget(DsoSettings *settings, DataAnalyzer *dataAnalyzer, QWidget 
 	// Connect other signals
 	this->connect(this->dataAnalyzer, SIGNAL(analyzed(unsigned int)), this, SLOT(dataAnalyzed()));
-	this->connect(this->dataAnalyzer, SIGNAL(analyzed(unsigned int)), this, SLOT(updateBufferSize(unsigned int)));
+	this->connect(this->dataAnalyzer, SIGNAL(analyzed(unsigned int)), this, SLOT(updateRecordLength(unsigned int)));
 }
 /// \brief Stops the oscilloscope thread and the timer.
@@ -332,7 +332,7 @@ void DsoWidget::updateFrequencybase() {
 /// \brief Updates the samplerate field after changing the samplerate.
 void DsoWidget::updateSamplerate() {
-	this->settingsRateLabel->setText(Helper::valueToString(this->settings->scope.horizontal.samplerate, Helper::UNIT_SAMPLES) + tr("/s"));
+	this->settingsSamplerateLabel->setText(Helper::valueToString(this->settings->scope.horizontal.samplerate, Helper::UNIT_SAMPLES) + tr("/s"));
 }
 /// \brief Handles timebaseChanged signal from the horizontal dock.
@@ -424,9 +424,9 @@ void DsoWidget::updateVoltageUsed(unsigned int channel, bool used) {
 	this->updateVoltageDetails(channel);
 }
-/// \brief Change the buffer size.
-void DsoWidget::updateBufferSize(unsigned int size) {
-	this->settingsBufferLabel->setText(tr("%1 S").arg(size));
+/// \brief Change the record length.
+void DsoWidget::updateRecordLength(unsigned int size) {
+	this->settingsRecordLengthLabel->setText(tr("%1 S").arg(size));
 }
 /// \brief Export the oscilloscope screen to a file.
@@ -69,8 +69,8 @@ class DsoWidget : public QWidget {
 		QHBoxLayout *settingsLayout; ///< The table for the settings info
 		QLabel *settingsTriggerLabel; ///< The trigger details
-		QLabel *settingsBufferLabel; ///< The buffer size
-		QLabel *settingsRateLabel; ///< The samplerate
+		QLabel *settingsRecordLengthLabel; ///< The record length
+		QLabel *settingsSamplerateLabel; ///< The samplerate
 		QLabel *settingsTimebaseLabel; ///< The timebase of the main scope
 		QLabel *settingsFrequencybaseLabel; ///< The frequencybase of the main scope
@@ -116,7 +116,7 @@ class DsoWidget : public QWidget {
 		void updateVoltageUsed(unsigned int channel, bool used);
 		// Menus
-		void updateBufferSize(unsigned int size);
+		void updateRecordLength(unsigned int size);
 		// Export
 		bool exportAs();
@@ -42,11 +42,12 @@ namespace Hantek {
 	/// \param parent The parent widget.
 	Control::Control(QObject *parent) : DsoControl(parent) {
 		// Use DSO-2090 specification as default
-		this->specification.command.bulk.setBuffer = BULK_SETTRIGGERANDSAMPLERATE;
+		this->specification.command.bulk.setRecordLength = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.bulk.setFilter = BULK_SETFILTER;
 		this->specification.command.bulk.setGain = BULK_SETGAIN;
 		this->specification.command.bulk.setSamplerate = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.bulk.setTrigger = BULK_SETTRIGGERANDSAMPLERATE;
+		this->specification.command.bulk.setPretrigger = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.control.setOffset = CONTROL_SETOFFSET;
 		this->specification.command.control.setRelays = CONTROL_SETRELAYS;
 		this->specification.command.values.offsetLimits = VALUE_OFFSETLIMITS;
@@ -65,7 +66,7 @@ namespace Hantek {
 		}
 		// Set settings to default values
-		this->settings.bufferSizeId = 0;
+		this->settings.recordLengthId = 0;
 		this->settings.samplerate.limits = &(this->specification.samplerate.single);
 		this->settings.samplerate.downsampling = 1;
 		this->settings.trigger.position = 0;
@@ -76,23 +77,11 @@ namespace Hantek {
 		// Special trigger sources
 		this->specialTriggerSources << tr("EXT") << tr("EXT/10");
-		// Transmission-ready bulk commands
-		this->command[BULK_SETFILTER] = new BulkSetFilter();
-		this->command[BULK_SETTRIGGERANDSAMPLERATE] = new BulkSetTriggerAndSamplerate();
-		this->command[BULK_FORCETRIGGER] = new BulkForceTrigger();
-		this->command[BULK_STARTSAMPLING] = new BulkCaptureStart();
-		this->command[BULK_ENABLETRIGGER] = new BulkTriggerEnabled();
-		this->command[BULK_GETDATA] = new BulkGetData();
-		this->command[BULK_GETCAPTURESTATE] = new BulkGetCaptureState();
-		this->command[BULK_SETGAIN] = new BulkSetGain();
-		this->command[BULK_SETLOGICALDATA] = new BulkSetLogicalData();
-		this->command[BULK_GETLOGICALDATA] = new BulkGetLogicalData();
-		this->command[BULK_SETSAMPLERATE5200] = new BulkSetSamplerate5200();
-		this->command[BULK_SETBUFFER5200] = new BulkSetBuffer5200();
-		this->command[BULK_SETTRIGGER5200] = new BulkSetTrigger5200();
-		
-		for(int command = 0; command < BULK_COUNT; command++)
+		// Instantiate bulk command later, some are not the same for all models
+		for(int command = 0; command < BULK_COUNT; ++command) {
+			this->command[command] = 0;
 			this->commandPending[command] = false;
+		}
 		// Transmission-ready control commands
 		this->control[CONTROLINDEX_SETOFFSET] = new ControlSetOffset();
@@ -118,6 +107,12 @@ namespace Hantek {
 	/// \brief Disconnects the device.
 	Control::~Control() {
 		this->device->disconnect();
+		
+		// Clean up commands
+		for(int command = 0; command < BULK_COUNT; ++command) {
+			if(this->command[command])
+				delete this->command[command];
+		}
 	}
 	/// \brief Gets the physical channel count for this oscilloscope.
@@ -186,7 +181,7 @@ namespace Hantek {
 			// Check the current oscilloscope state everytime 25% of the time the buffer should be refilled
 			// Not more often than every 10 ms though
-			int cycleTime = qMax((unsigned long int) (this->specification.bufferSizes[this->settings.bufferSizeId] / this->settings.samplerate.current * 250), (long unsigned int) 10);
+			int cycleTime = qMax((unsigned long int) (this->specification.recordLengths[this->settings.recordLengthId] / this->settings.samplerate.current * 250), (long unsigned int) 10);
 			this->msleep(cycleTime);
 			if(!this->sampling) {
@@ -296,7 +291,7 @@ namespace Hantek {
 	}
 	/// \brief Gets the current state.
-	/// \return The current CaptureState of the oscilloscope.
+	/// \return The current CaptureState of the oscilloscope, libusb error code on error.
 	int Control::getCaptureState() {
 		int errorCode;
@@ -325,7 +320,7 @@ namespace Hantek {
 			return errorCode;
 		// Save raw data to temporary buffer
-		unsigned int dataCount = this->specification.bufferSizes[this->settings.bufferSizeId] * HANTEK_CHANNELS;
+		unsigned int dataCount = this->specification.recordLengths[this->settings.recordLengthId] * HANTEK_CHANNELS;
 		unsigned int dataLength = dataCount;
 		bool using10Bits = false;
 		if(this->device->getModel() == MODEL_DSO5200 || this->device->getModel() == MODEL_DSO5200A) {
@@ -350,16 +345,28 @@ namespace Hantek {
 			this->samplesMutex.lock();
 			// Get oscilloscope settings
-			bool fastRate;
-			UsedChannels usedChannels;
-			if(this->specification.command.bulk.setTrigger == BULK_SETTRIGGERANDSAMPLERATE) {
-				fastRate = ((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getFastRate();
-				usedChannels = (UsedChannels) ((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getUsedChannels();
-			}
-			else {
-				fastRate = ((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->getFastRate();
-				usedChannels = (UsedChannels) ((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->getUsedChannels();
+			bool fastRate = false;
+			UsedChannels usedChannels = USED_NONE;
+			switch(this->specification.command.bulk.setTrigger) {
+				case BULK_SETTRIGGERANDSAMPLERATE:
+					fastRate = ((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getFastRate();
+					usedChannels = (UsedChannels) ((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getUsedChannels();
+					break;
+				
+				case BULK_CSETTRIGGERORSAMPLERATE:
+					fastRate = ((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getFastRate();
+					usedChannels = (UsedChannels) ((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getUsedChannels();
+					break;
+				
+				case BULK_ESETTRIGGERORSAMPLERATE:
+					fastRate = ((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getFastRate();
+					usedChannels = (UsedChannels) ((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getUsedChannels();
+					break;
+				
+				default:
+					break;
 			}
+			
 			// Convert channel data
 			if(fastRate) {
 				// Fast rate mode, one channel is using all buffers
@@ -462,50 +469,64 @@ namespace Hantek {
 	}
 	/// \brief Sets the size of the sample buffer without updating dependencies.
-	/// \param size The buffer size that should be met (S).
-	/// \return The buffer size that has been set, 0 on error.
-	unsigned long int Control::updateBufferSize(unsigned long int size) {
-		// Get the buffer size supporting the highest samplerate while meeting the requirement
+	/// \param size The record length that should be met (S).
+	/// \return The record length that has been set, 0 on error.
+	unsigned long int Control::updateRecordLength(unsigned long int size) {
+		// Get the record length supporting the highest samplerate while meeting the requirement
 		int bestSizeId = -1;
-		for(int sizeId = 0; sizeId < this->specification.bufferSizes.count(); sizeId++) {
-			if(this->specification.bufferSizes[sizeId] >= size) {
+		for(int sizeId = 0; sizeId < this->specification.recordLengths.count(); sizeId++) {
+			if(this->specification.recordLengths[sizeId] >= size) {
 				// We meet the size-requirement, check if we provide the highest possible samplerate
-				if(bestSizeId == -1 || this->specification.bufferSizes[bestSizeId] < size || this->specification.bufferDividers[sizeId] < this->specification.bufferDividers[bestSizeId])
+				if(bestSizeId == -1 || this->specification.recordLengths[bestSizeId] < size || this->specification.bufferDividers[sizeId] < this->specification.bufferDividers[bestSizeId])
 					bestSizeId = sizeId;
 			}
 			else {
 				// We don't meet the size-requirement, but maybe we're still the one coming closest
-				if(bestSizeId == -1 || this->specification.bufferSizes[sizeId] > this->specification.bufferSizes[bestSizeId])
+				if(bestSizeId == -1 || this->specification.recordLengths[sizeId] > this->specification.recordLengths[bestSizeId])
 					bestSizeId = sizeId;
 			}
 		}
-		switch(this->specification.command.bulk.setBuffer) {
+		switch(this->specification.command.bulk.setRecordLength) {
 			case BULK_SETTRIGGERANDSAMPLERATE:
-				// SetTriggerAndSamplerate bulk command for buffer size
-				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setBufferSize(bestSizeId);
+				// SetTriggerAndSamplerate bulk command for record length
+				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setRecordLength(bestSizeId);
 				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
 				break;
-			case BULK_SETBUFFER5200: {
-				// SetBuffer5200 bulk command for buffer size
-				BulkSetBuffer5200 *commandSetBuffer5200 = (BulkSetBuffer5200 *) this->command[BULK_SETBUFFER5200];
-				commandSetBuffer5200->setUsedPre(DTRIGGERPOSITION_ON);
-				commandSetBuffer5200->setUsedPost(DTRIGGERPOSITION_ON);
-				commandSetBuffer5200->setBufferSize(bestSizeId);
-				this->commandPending[BULK_SETBUFFER5200] = true;
-				
+			case BULK_DSETBUFFER:
+				if(this->specification.command.bulk.setPretrigger == BULK_FSETBUFFER) {
+					// Pointers to needed commands
+					BulkSetRecordLength2250 *commandSetRecordLength2250 = (BulkSetRecordLength2250 *) this->command[BULK_DSETBUFFER];
+					BulkSetBuffer2250 *commandSetBuffer2250 = (BulkSetBuffer2250 *) this->command[BULK_FSETBUFFER];
+					
+					commandSetRecordLength2250->setRecordLength(bestSizeId);
+					commandSetBuffer2250->setUsedPre(FTRIGGERPOSITION_ON);
+					commandSetBuffer2250->setUsedPost(FTRIGGERPOSITION_ON);
+					commandSetBuffer2250->setLargeBuffer(bestSizeId == RECORDLENGTHID_LARGE);
+					commandSetBuffer2250->setSlowBuffer(bestSizeId != RECORDLENGTHID_SMALL);
+					
+					this->commandPending[BULK_DSETBUFFER] = true;
+					this->commandPending[BULK_FSETBUFFER] = true;
+				}
+				else {
+					// SetBuffer5200 bulk command for record length
+					BulkSetBuffer5200 *commandSetBuffer5200 = (BulkSetBuffer5200 *) this->command[BULK_DSETBUFFER];
+					commandSetBuffer5200->setUsedPre(DTRIGGERPOSITION_ON);
+					commandSetBuffer5200->setUsedPost(DTRIGGERPOSITION_ON);
+					commandSetBuffer5200->setRecordLength(bestSizeId);
+					this->commandPending[BULK_DSETBUFFER] = true;
+				}
 				break;
-			}
 			default:
 				return 0;
 		}
-		this->settings.bufferSizeId = bestSizeId;
+		this->settings.recordLengthId = bestSizeId;
-		return this->specification.bufferSizes[this->settings.bufferSizeId];
+		return this->specification.recordLengths[this->settings.recordLengthId];
 	}
 	/// \brief Try to connect to the oscilloscope.
@@ -516,28 +537,26 @@ namespace Hantek {
 		if(!this->device->isConnected())
 			return;
-		// Initialize the commands used on the DSO-2090 as pending
-		this->commandPending[BULK_SETFILTER] = true;
-		this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
-		this->commandPending[BULK_FORCETRIGGER] = false;
-		this->commandPending[BULK_STARTSAMPLING] = false;
-		this->commandPending[BULK_ENABLETRIGGER] = false;
-		this->commandPending[BULK_GETDATA] = false;
-		this->commandPending[BULK_GETCAPTURESTATE] = false;
-		this->commandPending[BULK_SETGAIN] = true;
-		this->commandPending[BULK_SETLOGICALDATA] = false;
-		this->commandPending[BULK_GETLOGICALDATA] = false;
-		this->commandPending[BULK_UNKNOWN_0A] = false;
-		this->commandPending[BULK_UNKNOWN_0B] = false;
-		this->commandPending[BULK_SETSAMPLERATE5200] = false;
-		this->commandPending[BULK_SETBUFFER5200] = false;
-		this->commandPending[BULK_SETTRIGGER5200] = false;
+		// Clean up commands and their pending state
+		for(int command = 0; command < BULK_COUNT; ++command) {
+			if(this->command[command])
+				delete this->command[command];
+			this->commandPending[command] = false;
+		}
+		// Instantiate the commands needed for all models
+		this->command[BULK_FORCETRIGGER] = new BulkForceTrigger();
+		this->command[BULK_STARTSAMPLING] = new BulkCaptureStart();
+		this->command[BULK_ENABLETRIGGER] = new BulkTriggerEnabled();
+		this->command[BULK_GETDATA] = new BulkGetData();
+		this->command[BULK_GETCAPTURESTATE] = new BulkGetCaptureState();
+		this->command[BULK_SETGAIN] = new BulkSetGain();
 		// Initialize the command versions to the ones used on the DSO-2090
-		this->specification.command.bulk.setBuffer = BULK_SETTRIGGERANDSAMPLERATE;
+		this->specification.command.bulk.setRecordLength = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.bulk.setFilter = BULK_SETFILTER;
 		this->specification.command.bulk.setGain = BULK_SETGAIN;
 		this->specification.command.bulk.setSamplerate = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.bulk.setTrigger = BULK_SETTRIGGERANDSAMPLERATE;
+		this->specification.command.bulk.setPretrigger = BULK_SETTRIGGERANDSAMPLERATE;
 		this->specification.command.control.setOffset = CONTROL_SETOFFSET;
 		this->specification.command.control.setRelays = CONTROL_SETRELAYS;
 		this->specification.command.values.offsetLimits = VALUE_OFFSETLIMITS;
@@ -550,23 +569,50 @@ namespace Hantek {
 				unsupported = true;
 			case MODEL_DSO2090:
-				// Keep the defaults we've set before
+				// Instantiate additional commands for the DSO-2090
+				this->command[BULK_SETFILTER] = new BulkSetFilter();
+				this->command[BULK_SETTRIGGERANDSAMPLERATE] = new BulkSetTriggerAndSamplerate();
+				// Initialize those as pending
+				this->commandPending[BULK_SETFILTER] = true;
+				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
 				break;
 			case MODEL_DSO2250:
+				// Instantiate additional commands for the DSO-2250
+				this->command[BULK_BSETFILTER] = new BulkSetFilter2250();
+				this->command[BULK_CSETTRIGGERORSAMPLERATE] = new BulkSetTrigger2250();
+				this->command[BULK_DSETBUFFER] = new BulkSetRecordLength2250();
+				this->command[BULK_ESETTRIGGERORSAMPLERATE] = new BulkSetSamplerate2250();
+				this->specification.command.bulk.setRecordLength = BULK_DSETBUFFER;
+				this->specification.command.bulk.setFilter = BULK_BSETFILTER;
+				this->specification.command.bulk.setSamplerate = BULK_ESETTRIGGERORSAMPLERATE;
+				this->specification.command.bulk.setTrigger = BULK_CSETTRIGGERORSAMPLERATE;
+				this->specification.command.bulk.setPretrigger = BULK_FSETBUFFER;
+				
+				this->commandPending[BULK_BSETFILTER] = true;
+				this->commandPending[BULK_CSETTRIGGERORSAMPLERATE] = true;
+				this->commandPending[BULK_DSETBUFFER] = true;
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
+				
+				break;
+			
 			case MODEL_DSO5200A:
 				unsupported = true;
 			case MODEL_DSO5200:
-				this->specification.command.bulk.setBuffer = BULK_SETBUFFER5200;
-				this->specification.command.bulk.setSamplerate = BULK_SETSAMPLERATE5200;
-				this->specification.command.bulk.setTrigger = BULK_SETTRIGGER5200;
-				this->specification.command.values.voltageLimits = VALUE_VOLTAGELIMITS;
+				// Instantiate additional commands for the DSO-5200
+				this->command[BULK_CSETTRIGGERORSAMPLERATE] = new BulkSetSamplerate5200();
+				this->command[BULK_DSETBUFFER] = new BulkSetBuffer5200();
+				this->command[BULK_ESETTRIGGERORSAMPLERATE] = new BulkSetTrigger5200();
+				this->specification.command.bulk.setRecordLength = BULK_DSETBUFFER;
+				this->specification.command.bulk.setSamplerate = BULK_CSETTRIGGERORSAMPLERATE;
+				this->specification.command.bulk.setTrigger = BULK_ESETTRIGGERORSAMPLERATE;
+				this->specification.command.bulk.setPretrigger = BULK_ESETTRIGGERORSAMPLERATE;
+				//this->specification.command.values.voltageLimits = VALUE_ETSCORRECTION;
-				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = false;
-				this->commandPending[BULK_SETSAMPLERATE5200] = true;
-				this->commandPending[BULK_SETBUFFER5200] = true;
-				this->commandPending[BULK_SETTRIGGER5200] = true;
+				this->commandPending[BULK_CSETTRIGGERORSAMPLERATE] = true;
+				this->commandPending[BULK_DSETBUFFER] = true;
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
 				break;
@@ -582,15 +628,14 @@ namespace Hantek {
 		for(int control = 0; control < CONTROLINDEX_COUNT; control++)
 			this->controlPending[control] = true;
-		// Maximum possible samplerate for a single channel and dividers for buffer sizes
+		// Maximum possible samplerate for a single channel and dividers for record lengths
 		this->specification.bufferDividers.clear();
-		this->specification.bufferSizes.clear();
+		this->specification.recordLengths.clear();
 		this->specification.gainSteps.clear();
 		for(int channel = 0; channel < HANTEK_CHANNELS; channel++)
 			this->specification.voltageLimit[channel].clear();
 		switch(this->device->getModel()) {
-			case MODEL_DSO2250:
 			case MODEL_DSO5200:
 			case MODEL_DSO5200A:
 				this->specification.samplerate.single.base = 100e6;
@@ -598,7 +643,7 @@ namespace Hantek {
 				this->specification.samplerate.multi.base = 200e6;
 				this->specification.samplerate.multi.max = 250e6;
 				this->specification.bufferDividers << 1000 << 1 << 2;
-				this->specification.bufferSizes << ULONG_MAX << 10240 << 14336;
+				this->specification.recordLengths << ULONG_MAX << 10240 << 14336;
 				this->specification.gainSteps
 					<< 0.16 << 0.40 << 0.80 << 1.60 << 4.00 <<  8.0 << 16.0 << 40.0 << 80.0;
 				/// \todo Use calibration data to get the DSO-5200(A) sample ranges
@@ -609,13 +654,29 @@ namespace Hantek {
 					<<    1 <<    0 <<    0 <<    1 <<    0 <<    0 <<    1 <<    0 <<    0;
 				break;
+			case MODEL_DSO2250:
+				this->specification.samplerate.single.base = 200e6;
+				this->specification.samplerate.single.max = 125e6;
+				this->specification.samplerate.multi.base = 200e6;
+				this->specification.samplerate.multi.max = 250e6;
+				this->specification.bufferDividers << 1000 << 1 << 2;
+				this->specification.recordLengths << ULONG_MAX << 10240 << 524288;
+				this->specification.gainSteps
+					<< 0.08 << 0.16 << 0.40 << 0.80 << 1.60 << 4.00 <<  8.0 << 16.0 << 40.0;
+				for(int channel = 0; channel < HANTEK_CHANNELS; channel++)
+					this->specification.voltageLimit[channel]
+					<<  255 <<  255 <<  255 <<  255 <<  255 <<  255 <<  255 <<  255 <<  255;
+				this->specification.gainIndex
+					<<    0 <<    1 <<    2 <<    0 <<    1 <<    2 <<    0 <<    1 <<    2;
+				break;
+			
 			case MODEL_DSO2150:
 				this->specification.samplerate.single.base = 50e6;
 				this->specification.samplerate.single.max = 75e6;
 				this->specification.samplerate.multi.base = 100e6;
 				this->specification.samplerate.multi.max = 150e6;
 				this->specification.bufferDividers << 1000 << 1 << 2;
-				this->specification.bufferSizes << ULONG_MAX << 10240 << 32768;
+				this->specification.recordLengths << ULONG_MAX << 10240 << 32768;
 				this->specification.gainSteps
 					<< 0.08 << 0.16 << 0.40 << 0.80 << 1.60 << 4.00 <<  8.0 << 16.0 << 40.0;
 				for(int channel = 0; channel < HANTEK_CHANNELS; channel++)
@@ -631,7 +692,7 @@ namespace Hantek {
 				this->specification.samplerate.multi.base = 100e6;
 				this->specification.samplerate.multi.max = 100e6;
 				this->specification.bufferDividers << 1000 << 1 << 2;
-				this->specification.bufferSizes << ULONG_MAX << 10240 << 32768;
+				this->specification.recordLengths << ULONG_MAX << 10240 << 32768;
 				this->specification.gainSteps
 					<< 0.08 << 0.16 << 0.40 << 0.80 << 1.60 << 4.00 <<  8.0 << 16.0 << 40.0;
 				for(int channel = 0; channel < HANTEK_CHANNELS; channel++)
@@ -656,23 +717,23 @@ namespace Hantek {
 	}
 	/// \brief Sets the size of the oscilloscopes sample buffer.
-	/// \param size The buffer size that should be met (S).
-	/// \return The buffer size that has been set.
-	unsigned long int Control::setBufferSize(unsigned long int size) {
+	/// \param size The record length that should be met (S).
+	/// \return The record length that has been set, 0 on error.
+	unsigned long int Control::setRecordLength(unsigned long int size) {
 		if(!this->device->isConnected())
 			return 0;
-		this->updateBufferSize(size);
+		this->updateRecordLength(size);
-		this->setTriggerPosition(this->settings.trigger.position);
+		this->setPretriggerPosition(this->settings.trigger.position);
 		this->setSamplerate();
-		return this->specification.bufferSizes[this->settings.bufferSizeId];
+		return this->specification.recordLengths[this->settings.recordLengthId];
 	}
 	/// \brief Sets the samplerate of the oscilloscope.
 	/// \param samplerate The samplerate that should be met (S/s).
-	/// \return The samplerate that has been set.
+	/// \return The samplerate that has been set, 0 on error.
 	unsigned long int Control::setSamplerate(unsigned long int samplerate) {
 		if(!this->device->isConnected())
 			return 0;
@@ -693,24 +754,24 @@ namespace Hantek {
 		}
 		// Get downsampling factor that would provide the requested rate
-		this->settings.samplerate.downsampling = this->settings.samplerate.limits->base / this->specification.bufferDividers[this->settings.bufferSizeId] / samplerate;
+		this->settings.samplerate.downsampling = this->settings.samplerate.limits->base / this->specification.bufferDividers[this->settings.recordLengthId] / samplerate;
 		// A downsampling factor of zero will result in the maximum rate
 		if(this->settings.samplerate.downsampling)
-			this->settings.samplerate.current = this->settings.samplerate.limits->base / this->specification.bufferDividers[this->settings.bufferSizeId] / this->settings.samplerate.downsampling;
+			this->settings.samplerate.current = this->settings.samplerate.limits->base / this->specification.bufferDividers[this->settings.recordLengthId] / this->settings.samplerate.downsampling;
 		else
-			this->settings.samplerate.current = this->settings.samplerate.limits->max / this->specification.bufferDividers[this->settings.bufferSizeId];
+			this->settings.samplerate.current = this->settings.samplerate.limits->max / this->specification.bufferDividers[this->settings.recordLengthId];
 		// Maybe normal mode would be sufficient or even better than fast rate mode
 		if(fastRate) {
 			// Don't set the downsampling factor to zero (maximum rate) if we could use fast rate mode anyway
-			unsigned long int slowDownsampling = qMax(this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.bufferSizeId] / samplerate, (long unsigned int) 1);
+			unsigned long int slowDownsampling = qMax(this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.recordLengthId] / samplerate, (long unsigned int) 1);
 			// Use normal mode if we need valueSlow or it would meet the rate at least as exactly as fast rate mode
-			if(this->settings.samplerate.downsampling > 4 || (qAbs((double) this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.bufferSizeId] / slowDownsampling - samplerate) <= qAbs(this->settings.samplerate.current - samplerate))) {
+			if(this->settings.samplerate.downsampling > 4 || (qAbs((double) this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.recordLengthId] / slowDownsampling - samplerate) <= qAbs(this->settings.samplerate.current - samplerate))) {
 				fastRate = false;
 				this->settings.samplerate.limits = &(this->specification.samplerate.single);
 				this->settings.samplerate.downsampling = slowDownsampling;
-				this->settings.samplerate.current = this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.bufferSizeId] / this->settings.samplerate.downsampling;
+				this->settings.samplerate.current = this->specification.samplerate.single.base / this->specification.bufferDividers[this->settings.recordLengthId] / this->settings.samplerate.downsampling;
 			}
 		}
@@ -735,10 +796,11 @@ namespace Hantek {
 				break;
 			}
-			case BULK_SETSAMPLERATE5200: {
+			case BULK_CSETTRIGGERORSAMPLERATE: {
 				// Pointers to needed commands
-				BulkSetSamplerate5200 *commandSetSamplerate5200 = (BulkSetSamplerate5200 *) this->command[BULK_SETSAMPLERATE5200];
-				BulkSetTrigger5200 *commandSetTrigger5200 = (BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200];
+				BulkSetSamplerate5200 *commandSetSamplerate5200 = (BulkSetSamplerate5200 *) this->command[BULK_CSETTRIGGERORSAMPLERATE];
+				BulkSetTrigger5200 *commandSetTrigger5200 = (BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE];
+				
 				// Store samplerate fast value
 				commandSetSamplerate5200->setSamplerateFast(4 - valueFast);
 				// Store samplerate slow value (two's complement)
@@ -746,8 +808,23 @@ namespace Hantek {
 				// Set fast rate when used
 				commandSetTrigger5200->setFastRate(fastRate);
-				this->commandPending[BULK_SETSAMPLERATE5200] = true;
-				this->commandPending[BULK_SETTRIGGER5200] = true;
+				this->commandPending[BULK_CSETTRIGGERORSAMPLERATE] = true;
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
+				
+				break;
+			}
+			case BULK_ESETTRIGGERORSAMPLERATE: {
+				// Pointers to needed commands
+				BulkSetSamplerate2250 *commandSetSamplerate2250 = (BulkSetSamplerate2250 *) this->command[BULK_ESETTRIGGERORSAMPLERATE];
+				
+				// Store samplerate fast value
+				commandSetSamplerate2250->setSamplerateFast(4 - valueFast);
+				// Store samplerate slow value (two's complement)
+				commandSetSamplerate2250->setSamplerateSlow(valueSlow == 0 ? 0 : 0xffff - valueSlow);
+				// Set fast rate when used
+				commandSetSamplerate2250->setFastRate(fastRate);
+				
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
 				break;
 			}
@@ -755,81 +832,102 @@ namespace Hantek {
 				return 0;
 		}
-		this->updateBufferSize(this->specification.bufferSizes[this->settings.bufferSizeId]);
-		this->setTriggerPosition(this->settings.trigger.position);
+		this->updateRecordLength(this->specification.recordLengths[this->settings.recordLengthId]);
+		this->setPretriggerPosition(this->settings.trigger.position);
 		return this->settings.samplerate.current;
 	}	
 	/// \brief Enables/disables filtering of the given channel.
 	/// \param channel The channel that should be set.
 	/// \param used true if the channel should be sampled.
-	/// \return 0 on success, -1 on invalid channel.
+	/// \return See ::Dso::ErrorCode.
 	int Control::setChannelUsed(unsigned int channel, bool used) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(channel >= HANTEK_CHANNELS)
-			return -1;
-		
-		// SetFilter bulk command for channel filter (used has to be inverted!)
-		BulkSetFilter *commandSetFilter = (BulkSetFilter *) this->command[BULK_SETFILTER];
-		commandSetFilter->setChannel(channel, !used);
-		this->commandPending[BULK_SETFILTER] = true;
+			return Dso::ERROR_PARAMETER;
 		unsigned char usedChannels = USED_CH1;
-		if(!commandSetFilter->getChannel(1)) {
-			if(commandSetFilter->getChannel(0))
-				usedChannels = USED_CH2;
-			else
-				usedChannels = USED_CH1CH2;
-		}
-		switch(this->specification.command.bulk.setTrigger) {
-			case BULK_SETTRIGGER5200: {
-				// SetTrigger5200s bulk command for trigger source
-				((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->setUsedChannels(usedChannels);
-				this->commandPending[BULK_SETTRIGGER5200] = true;
+		switch(this->specification.command.bulk.setFilter) {
+			case BULK_SETFILTER: {
+				// SetFilter bulk command for channel filter (used has to be inverted!)
+				BulkSetFilter *commandSetFilter = (BulkSetFilter *) this->command[BULK_SETFILTER];
+				commandSetFilter->setChannel(channel, !used);
+				this->commandPending[BULK_SETFILTER] = true;
+				
+				if(!commandSetFilter->getChannel(1)) {
+					if(commandSetFilter->getChannel(0))
+						usedChannels = USED_CH2;
+					else
+						usedChannels = USED_CH1CH2;
+				}
+				
 				break;
 			}
-			default: {
-				// SetTriggerAndSamplerate bulk command for trigger source
-				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setUsedChannels(usedChannels);
-				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
+			case BULK_BSETFILTER: {
+				// SetFilter2250 bulk command for channel filter (used has to be inverted!)
+				BulkSetFilter2250 *commandSetFilter2250 = (BulkSetFilter2250 *) this->command[BULK_BSETFILTER];
+				commandSetFilter2250->setChannel(channel, !used);
+				this->commandPending[BULK_BSETFILTER] = true;
+				
 				break;
 			}
+			default:
+				return Dso::ERROR_UNSUPPORTED;
 		}
-		return 0;
+		if(this->specification.command.bulk.setTrigger == BULK_SETTRIGGERANDSAMPLERATE || this->specification.command.bulk.setTrigger == BULK_ESETTRIGGERORSAMPLERATE) {
+			switch(this->specification.command.bulk.setTrigger) {
+				case BULK_SETTRIGGERANDSAMPLERATE: {
+					// SetTriggerAndSamplerate bulk command for trigger source
+					((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setUsedChannels(usedChannels);
+					this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
+					break;
+				}
+				case BULK_ESETTRIGGERORSAMPLERATE: {
+					// SetTrigger5200s bulk command for trigger source
+					((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->setUsedChannels(usedChannels);
+					this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
+					break;
+				}
+				default:
+					break;
+			}
+		}
+		
+		return Dso::ERROR_NONE;
 	}
 	/// \brief Set the coupling for the given channel.
 	/// \param channel The channel that should be set.
 	/// \param coupling The new coupling for the channel.
-	/// \return 0 on success, -1 on invalid channel.
+	/// \return See ::Dso::ErrorCode.
 	int Control::setCoupling(unsigned int channel, Dso::Coupling coupling) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(channel >= HANTEK_CHANNELS)
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		// SetRelays control command for coupling relays
 		((ControlSetRelays *) this->control[CONTROLINDEX_SETRELAYS])->setCoupling(channel, coupling != Dso::COUPLING_AC);
 		this->controlPending[CONTROLINDEX_SETRELAYS] = true;
-		return 0;
+		return Dso::ERROR_NONE;
 	}
 	/// \brief Sets the gain for the given channel.
 	/// \param channel The channel that should be set.
 	/// \param gain The gain that should be met (V/div).
-	/// \return The gain that has been set, -1 on invalid channel.
+	/// \return The gain that has been set, ::Dso::ErrorCode on error.
 	double Control::setGain(unsigned int channel, double gain) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(channel >= HANTEK_CHANNELS)
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		// Find lowest gain voltage thats at least as high as the requested
 		int gainId;
@@ -857,13 +955,13 @@ namespace Hantek {
 	/// \brief Set the offset for the given channel.
 	/// \param channel The channel that should be set.
 	/// \param offset The new offset value (0.0 - 1.0).
-	/// \return The offset that has been set, -1.0 on invalid channel.
+	/// \return The offset that has been set, ::Dso::ErrorCode on error.
 	double Control::setOffset(unsigned int channel, double offset) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(channel >= HANTEK_CHANNELS)
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		// Calculate the offset value
 		// The range is given by the calibration data (convert from big endian)
@@ -885,28 +983,28 @@ namespace Hantek {
 	}
 	/// \brief Set the trigger mode.
-	/// \return 0 on success, -1 on invalid mode.
+	/// \return See ::Dso::ErrorCode.
 	int Control::setTriggerMode(Dso::TriggerMode mode) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(mode < Dso::TRIGGERMODE_AUTO || mode > Dso::TRIGGERMODE_SINGLE)
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		this->settings.trigger.mode = mode;
-		return 0;
+		return Dso::ERROR_NONE;
 	}
 	/// \brief Set the trigger source.
 	/// \param special true for a special channel (EXT, ...) as trigger source.
 	/// \param id The number of the channel, that should be used as trigger.
-	/// \return 0 on success, -1 on invalid channel.
+	/// \return See ::Dso::ErrorCode.
 	int Control::setTriggerSource(bool special, unsigned int id) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if((!special && id >= HANTEK_CHANNELS) || (special && id >= HANTEK_SPECIAL_CHANNELS))
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		// Generate trigger source value that will be transmitted
 		int sourceValue;
@@ -916,17 +1014,26 @@ namespace Hantek {
 			sourceValue = TRIGGER_CH1 - id;
 		switch(this->specification.command.bulk.setTrigger) {
-			case BULK_SETTRIGGER5200:
-				// SetTrigger5200 bulk command for trigger source
-				((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->setTriggerSource(sourceValue);
-				this->commandPending[BULK_SETTRIGGER5200] = true;
-				break;
-			
-			default:
+			case BULK_SETTRIGGERANDSAMPLERATE:
 				// SetTriggerAndSamplerate bulk command for trigger source
 				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setTriggerSource(sourceValue);
 				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
 				break;
+			
+			case BULK_CSETTRIGGERORSAMPLERATE:
+				// SetTrigger2250 bulk command for trigger source
+				((BulkSetTrigger2250 *) this->command[BULK_CSETTRIGGERORSAMPLERATE])->setTriggerSource(sourceValue);
+				this->commandPending[BULK_CSETTRIGGERORSAMPLERATE] = true;
+				break;
+				
+			case BULK_ESETTRIGGERORSAMPLERATE:
+				// SetTrigger5200 bulk command for trigger source
+				((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->setTriggerSource(sourceValue);
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
+				break;
+			
+			default:
+				return Dso::ERROR_UNSUPPORTED;
 		}
 		// SetRelays control command for external trigger relay
@@ -945,19 +1052,19 @@ namespace Hantek {
 		else
 			this->setTriggerLevel(id, this->settings.trigger.level[id]);
-		return 0;
+		return Dso::ERROR_NONE;
 	}
 	/// \brief Set the trigger level.
 	/// \param channel The channel that should be set.
 	/// \param level The new trigger level (V).
-	/// \return The trigger level that has been set, -1.0 on invalid channel.
+	/// \return The trigger level that has been set, ::Dso::ErrorCode on error.
 	double Control::setTriggerLevel(unsigned int channel, double level) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(channel >= HANTEK_CHANNELS)
-			return -1.0;
+			return Dso::ERROR_PARAMETER;
 		// Calculate the trigger level value
 		unsigned short int minimum, maximum;
@@ -994,22 +1101,16 @@ namespace Hantek {
 	/// \brief Set the trigger slope.
 	/// \param slope The Slope that should cause a trigger.
-	/// \return 0 on success, -1 on invalid slope.
+	/// \return See ::Dso::ErrorCode.
 	int Control::setTriggerSlope(Dso::Slope slope) {
 		if(!this->device->isConnected())
-			return -2;
+			return Dso::ERROR_CONNECTION;
 		if(slope != Dso::SLOPE_NEGATIVE && slope != Dso::SLOPE_POSITIVE)
-			return -1;
+			return Dso::ERROR_PARAMETER;
 		switch(this->specification.command.bulk.setTrigger) {
-			case BULK_SETTRIGGER5200: {
-				// SetTrigger5200 bulk command for trigger slope
-				((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->setTriggerSlope(slope);
-				this->commandPending[BULK_SETTRIGGER5200] = true;
-				break;
-			}
-			default: {
+			case BULK_SETTRIGGERANDSAMPLERATE: {
 				// SetTriggerAndSamplerate bulk command for trigger slope
 				BulkSetTriggerAndSamplerate *commandSetTriggerAndSamplerate = (BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE];
@@ -1017,54 +1118,87 @@ namespace Hantek {
 				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
 				break;
 			}
+			case BULK_CSETTRIGGERORSAMPLERATE: {
+				// SetTrigger2250 bulk command for trigger slope
+				((BulkSetTrigger2250 *) this->command[BULK_CSETTRIGGERORSAMPLERATE])->setTriggerSlope(slope);
+				this->commandPending[BULK_CSETTRIGGERORSAMPLERATE] = true;
+				break;
+			}
+			case BULK_ESETTRIGGERORSAMPLERATE: {
+				// SetTrigger5200 bulk command for trigger slope
+				((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->setTriggerSlope(slope);
+				this->commandPending[BULK_ESETTRIGGERORSAMPLERATE] = true;
+				break;
+			}
+			default:
+				return Dso::ERROR_UNSUPPORTED;
 		}
 		this->settings.trigger.slope = slope;
-		return 0;
+		return Dso::ERROR_NONE;
 	}
 	/// \brief Set the trigger position.
 	/// \param position The new trigger position (in s).
 	/// \return The trigger position that has been set.
-	double Control::setTriggerPosition(double position) {
+	double Control::setPretriggerPosition(double position) {
 		if(!this->device->isConnected())
 			return -2;
 		// All trigger positions are measured in samples
 		unsigned long int positionSamples = position * this->settings.samplerate.current;
-		switch(this->specification.command.bulk.setTrigger) {
-			case BULK_SETTRIGGER5200: {
+		switch(this->specification.command.bulk.setPretrigger) {
+			case BULK_SETTRIGGERANDSAMPLERATE: {
 				// Fast rate mode uses both channels
-				if(((BulkSetTrigger5200 *) this->command[BULK_SETTRIGGER5200])->getFastRate())
+				if(((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getFastRate())
+					positionSamples /= HANTEK_CHANNELS;
+				
+				// Calculate the position value (Start point depending on record length)
+				unsigned long int position = 0x7ffff - this->specification.recordLengths[this->settings.recordLengthId] + positionSamples;
+				
+				// SetTriggerAndSamplerate bulk command for trigger position
+				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setTriggerPosition(position);
+				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
+				
+				break;
+			}
+			case BULK_FSETBUFFER: {
+				// Fast rate mode uses both channels
+				if(((BulkSetSamplerate2250 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getFastRate())
 					positionSamples /= HANTEK_CHANNELS;
 				// Calculate the position values (Inverse, maximum is 0xffff)
-				unsigned short int positionPre = 0xffff - this->specification.bufferSizes[this->settings.bufferSizeId] + positionSamples;
+				unsigned short int positionPre = 0xffff - this->specification.recordLengths[this->settings.recordLengthId] + positionSamples;
 				unsigned short int positionPost = 0xffff - positionSamples;
-				// SetBuffer5200 bulk command for trigger position
-				BulkSetBuffer5200 *commandSetBuffer5200 = (BulkSetBuffer5200 *) this->command[BULK_SETBUFFER5200];
-				commandSetBuffer5200->setTriggerPositionPre(positionPre);
-				commandSetBuffer5200->setTriggerPositionPost(positionPost);
-				this->commandPending[BULK_SETBUFFER5200] = true;
+				// SetBuffer2250 bulk command for trigger position
+				BulkSetBuffer2250 *commandSetBuffer2250 = (BulkSetBuffer2250 *) this->command[BULK_FSETBUFFER];
+				commandSetBuffer2250->setTriggerPositionPre(positionPre);
+				commandSetBuffer2250->setTriggerPositionPost(positionPost);
+				this->commandPending[BULK_FSETBUFFER] = true;
 				break;
 			}
-			default: {
+			case BULK_ESETTRIGGERORSAMPLERATE: {
 				// Fast rate mode uses both channels
-				if(((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->getFastRate())
+				if(((BulkSetTrigger5200 *) this->command[BULK_ESETTRIGGERORSAMPLERATE])->getFastRate())
 					positionSamples /= HANTEK_CHANNELS;
-				// Calculate the position value (Start point depending on buffer size)
-				unsigned long int position = 0x7ffff - this->specification.bufferSizes[this->settings.bufferSizeId] + positionSamples;
+				// Calculate the position values (Inverse, maximum is 0xffff)
+				unsigned short int positionPre = 0xffff - this->specification.recordLengths[this->settings.recordLengthId] + positionSamples;
+				unsigned short int positionPost = 0xffff - positionSamples;
-				// SetTriggerAndSamplerate bulk command for trigger position
-				((BulkSetTriggerAndSamplerate *) this->command[BULK_SETTRIGGERANDSAMPLERATE])->setTriggerPosition(position);
-				this->commandPending[BULK_SETTRIGGERANDSAMPLERATE] = true;
+				// SetBuffer5200 bulk command for trigger position
+				BulkSetBuffer5200 *commandSetBuffer5200 = (BulkSetBuffer5200 *) this->command[BULK_DSETBUFFER];
+				commandSetBuffer5200->setTriggerPositionPre(positionPre);
+				commandSetBuffer5200->setTriggerPositionPost(positionPost);
+				this->commandPending[BULK_DSETBUFFER] = true;
 				break;
 			}
+			default:
+				return Dso::ERROR_UNSUPPORTED;
 		}
 		this->settings.trigger.position = position;
@@ -1073,11 +1207,19 @@ namespace Hantek {
 #ifdef DEBUG
 	/// \brief Sends bulk/control commands directly.
+	/// <p>
+	///		<b>Syntax:</b><br />
+	///		<br />
+	///		Bulk command:
+	///		<pre>send bulk [<em>hex data</em>]</pre>
+	///		%Control command:
+	///		<pre>send control [<em>hex code</em>] [<em>hex data</em>]</pre>
+	/// </p>
 	/// \param command The command as string (Has to be parsed).
-	/// \return 0 on success, -1 on unknown command, -2 on syntax error.
+	/// \return See ::Dso::ErrorCode.
 	int Control::stringCommand(QString command) {
 		if(!this->device->isConnected())
-			return -3;
+			return Dso::ERROR_CONNECTION;
 		QStringList commandParts = command.split(' ', QString::SkipEmptyParts);
@@ -1091,17 +1233,14 @@ namespace Hantek {
 						// Read command code (First byte)
 						Helper::hexParse(data, &commandCode, 1);
 						if(commandCode > BULK_COUNT)
-							return -2;
+							return Dso::ERROR_UNSUPPORTED;
 						// Update bulk command and mark as pending
 						Helper::hexParse(data, this->command[commandCode]->data(), this->command[commandCode]->getSize());
 						this->commandPending[commandCode] = true;
-						return 0;
+						return Dso::ERROR_NONE;
 					}
 					else if(commandParts[1] == "control") {
-						if(commandParts.count() <= 1)
-							return -2;
-						
 						// Get control code from third part
 						unsigned char controlCode = commandParts[2].toUShort();
 						int control;
@@ -1110,20 +1249,26 @@ namespace Hantek {
 								break;
 						}
 						if(control >= CONTROLINDEX_COUNT)
-							return -2;
+							return Dso::ERROR_UNSUPPORTED;
 						QString data = command.section(' ', 3, -1, QString::SectionSkipEmpty);
 						// Update control command and mark as pending
 						Helper::hexParse(data, this->control[control]->data(), this->control[control]->getSize());
 						this->controlPending[control] = true;
-						return 0;
+						return Dso::ERROR_NONE;
 					}
 				}
+				else {
+					return Dso::ERROR_PARAMETER;
+				}
 			}
 		}
+		else {
+			return Dso::ERROR_PARAMETER;
+		}
-		return -1;
+		return Dso::ERROR_UNSUPPORTED;
 	}
 #endif
 }
@@ -59,8 +59,9 @@ namespace Hantek {
 		BulkCode setFilter; ///< Command for setting used channels
 		BulkCode setSamplerate; ///< Command for samplerate settings
 		BulkCode setGain; ///< Command for gain settings (Usually in combination with CONTROL_SETRELAYS)
-		BulkCode setBuffer; ///< Command for buffer settings
+		BulkCode setRecordLength; ///< Command for buffer settings
 		BulkCode setTrigger; ///< Command for trigger settings
+		BulkCode setPretrigger; ///< Command for pretrigger settings
 	};
 	//////////////////////////////////////////////////////////////////////////////
@@ -113,8 +114,8 @@ namespace Hantek {
 		// Limits
 		ControlSpecificationSamplerate samplerate; ///< The samplerate specifications
-		QList<unsigned long int> bufferSizes; ///< Available buffer sizes, ULONG_MAX means rolling
-		QList<unsigned long int> bufferDividers; ///< Samplerate dividers for buffer sizes
+		QList<unsigned long int> recordLengths; ///< Available record lengths, ULONG_MAX means rolling
+		QList<unsigned long int> bufferDividers; ///< Samplerate dividers for record lengths
 		QList<double> gainSteps; ///< Available voltage steps in V/screenheight
 		// Calibration
@@ -166,7 +167,7 @@ namespace Hantek {
 		ControlSettingsSamplerate samplerate; ///< The samplerate settings
 		ControlSettingsVoltage voltage[HANTEK_CHANNELS]; ///< The amplification settings
 		ControlSettingsTrigger trigger; ///< The trigger settings
-		unsigned int bufferSizeId; ///< The id in the buffer size array
+		unsigned int recordLengthId; ///< The id in the record length array
 		unsigned short int usedChannels; ///< Number of activated channels
 	};
@@ -188,7 +189,7 @@ namespace Hantek {
 			unsigned short int calculateTriggerPoint(unsigned short int value);
 			int getCaptureState();
 			int getSamples(bool process);
-			unsigned long int updateBufferSize(unsigned long int size);
+			unsigned long int updateRecordLength(unsigned long int size);
 			// Communication with device
 			Device *device; ///< The USB device for the oscilloscope
@@ -212,7 +213,7 @@ namespace Hantek {
 			virtual void connectDevice();
 			unsigned long int setSamplerate(unsigned long int samplerate = 0);
-			unsigned long int setBufferSize(unsigned long int size);
+			unsigned long int setRecordLength(unsigned long int size);
 			int setChannelUsed(unsigned int channel, bool used);
 			int setCoupling(unsigned int channel, Dso::Coupling coupling);
@@ -223,7 +224,7 @@ namespace Hantek {
 			int setTriggerSource(bool special, unsigned int id);
 			double setTriggerLevel(unsigned int channel, double level);
 			int setTriggerSlope(Dso::Slope slope);
-			double setTriggerPosition(double position);
+			double setPretriggerPosition(double position);
 #ifdef DEBUG
 			int stringCommand(QString command);
@@ -104,16 +104,16 @@ namespace Hantek {
 	/// \param samplerateSlow The SamplerateSlow value.
 	/// \param triggerPosition The trigger position value.
 	/// \param triggerSource The trigger source id (Tsr1).
-	/// \param bufferSize The buffer size id (Tsr1).
+	/// \param recordLength The record length id (Tsr1).
 	/// \param samplerateFast The samplerateFast value (Tsr1).
 	/// \param usedChannels The enabled channels (Tsr2).
 	/// \param fastRate The fastRate state (Tsr2).
 	/// \param triggerSlope The triggerSlope value (Tsr2).
-	BulkSetTriggerAndSamplerate::BulkSetTriggerAndSamplerate(unsigned short int samplerateSlow, unsigned long int triggerPosition, unsigned char triggerSource, unsigned char bufferSize, unsigned char samplerateFast, unsigned char usedChannels, bool fastRate, unsigned char triggerSlope) : Helper::DataArray<unsigned char>(12) {
+	BulkSetTriggerAndSamplerate::BulkSetTriggerAndSamplerate(unsigned short int samplerateSlow, unsigned long int triggerPosition, unsigned char triggerSource, unsigned char recordLength, unsigned char samplerateFast, unsigned char usedChannels, bool fastRate, unsigned char triggerSlope) : Helper::DataArray<unsigned char>(12) {
 		this->init();
 		this->setTriggerSource(triggerSource);
-		this->setBufferSize(bufferSize);
+		this->setRecordLength(recordLength);
 		this->setSamplerateFast(samplerateFast);
 		this->setUsedChannels(usedChannels);
 		this->setFastRate(fastRate);
@@ -134,16 +134,16 @@ namespace Hantek {
 		((Tsr1Bits *) &(this->array[2]))->triggerSource = value;
 	}
-	/// \brief Get the bufferSize value in Tsr1Bits.
-	/// \return The ::BufferSizeId value.
-	unsigned char BulkSetTriggerAndSamplerate::getBufferSize() {
-		return ((Tsr1Bits *) &(this->array[2]))->bufferSize;
+	/// \brief Get the recordLength value in Tsr1Bits.
+	/// \return The ::RecordLengthId value.
+	unsigned char BulkSetTriggerAndSamplerate::getRecordLength() {
+		return ((Tsr1Bits *) &(this->array[2]))->recordLength;
 	}
-	/// \brief Set the bufferSize in Tsr1Bits to the given value.
-	/// \param value The new ::BufferSizeId value.
-	void BulkSetTriggerAndSamplerate::setBufferSize(unsigned char value) {
-		((Tsr1Bits *) &(this->array[2]))->bufferSize = value;
+	/// \brief Set the recordLength in Tsr1Bits to the given value.
+	/// \param value The new ::RecordLengthId value.
+	void BulkSetTriggerAndSamplerate::setRecordLength(unsigned char value) {
+		((Tsr1Bits *) &(this->array[2]))->recordLength = value;
 	}
 	/// \brief Get the samplerateFast value in Tsr1Bits.
@@ -376,190 +376,94 @@ namespace Hantek {
 	//////////////////////////////////////////////////////////////////////////////
-	// class BulkGetSpeed
-	/// \brief Initializes the array.
-	ControlGetSpeed::ControlGetSpeed() : Helper::DataArray<unsigned char>(10) {
-	}
-	
-	/// \brief Gets the speed of the connection.
-	/// \return The speed level of the USB connection.
-	ConnectionSpeed ControlGetSpeed::getSpeed() {
-		return (ConnectionSpeed) this->array[0];
+	// class BulkSetFilter2250
+	/// \brief Sets the data array to needed values.
+	BulkSetFilter2250::BulkSetFilter2250() : Helper::DataArray<unsigned char>(4) {
+		this->init();
 	}
-	
-	//////////////////////////////////////////////////////////////////////////////
-	// class BulkBeginCommand
-	/// \brief Sets the command index to the given value.
-	/// \param index The CommandIndex for the command.
-	ControlBeginCommand::ControlBeginCommand(BulkIndex index) : Helper::DataArray<unsigned char>(10) {
+	/// \brief Sets the used channels.
+	/// \param channel1 true if channel 1 is filtered.
+	/// \param channel2 true if channel 2 is filtered.
+	BulkSetFilter2250::BulkSetFilter2250(bool channel1, bool channel2) : Helper::DataArray<unsigned char>(4) {
 		this->init();
-		this->setIndex(index);
-	}
-	
-	/// \brief Gets the command index.
-	/// \return The CommandIndex for the command.
-	BulkIndex ControlBeginCommand::getIndex() {
-		return (BulkIndex) this->array[1];
-	}
-	
-	/// \brief Sets the command index to the given value.
-	/// \param index The new CommandIndex for the command.
-	void ControlBeginCommand::setIndex(BulkIndex index) {
-		memset(&(this->array[1]), (unsigned char) index, 3);
-	}
-	
-	/// \brief Initialize the array to the needed values.
-	void ControlBeginCommand::init() {
-		this->array[0] = 0x0f;
-	}
-	
-	
-	//////////////////////////////////////////////////////////////////////////////
-	// class BulkSetOffset
-	/// \brief Sets the data array to the default values.
-	ControlSetOffset::ControlSetOffset() : Helper::DataArray<unsigned char>(17) {
-	}
-	
-	/// \brief Sets the offsets to the given values.
-	/// \param channel1 The offset for channel 1.
-	/// \param channel2 The offset for channel 2.
-	/// \param trigger The offset for ext. trigger.
-	ControlSetOffset::ControlSetOffset(unsigned short int channel1, unsigned short int channel2, unsigned short int trigger) : Helper::DataArray<unsigned char>(17) {
 		this->setChannel(0, channel1);
 		this->setChannel(1, channel2);
-		this->setTrigger(trigger);
 	}
-	/// \brief Get the offset for the given channel.
-	/// \param channel The channel whose offset should be returned.
-	/// \return The channel offset value.
-	unsigned short int ControlSetOffset::getChannel(unsigned int channel) {
+	/// \brief Gets the filtering state of one channel.
+	/// \param channel The channel whose filtering state should be returned.
+	/// \return The filtering state of the channel.
+	bool BulkSetFilter2250::getChannel(unsigned int channel) {
+		FilterBits *filterBits = (FilterBits *) &(this->array[2]);
 		if(channel == 0)
-			return ((this->array[0] & 0x0f) << 8) | this->array[1];
+			return filterBits->channel1 == 1;
 		else
-			return ((this->array[2] & 0x0f) << 8) | this->array[3];
+			return filterBits->channel2 == 1;
 	}
-	/// \brief Set the offset for the given channel.
+	/// \brief Enables/disables filtering of one channel.
 	/// \param channel The channel that should be set.
-	/// \param offset The new channel offset value.
-	void ControlSetOffset::setChannel(unsigned int channel, unsigned short int offset) {
-		if(channel == 0) {
-			this->array[0] = (unsigned char) (offset >> 8);
-			this->array[1] = (unsigned char) offset;
-		}
-		else {
-			this->array[2] = (unsigned char) (offset >> 8);
-			this->array[3] = (unsigned char) offset;
-		}
-	}
-	
-	/// \brief Get the trigger level.
-	/// \return The trigger level value.
-	unsigned short int ControlSetOffset::getTrigger() {
-		return ((this->array[4] & 0x0f) << 8) | this->array[5];
+	/// \param filtered true if the channel should be filtered.
+	void BulkSetFilter2250::setChannel(unsigned int channel, bool filtered) {
+		FilterBits *filterBits = (FilterBits *) &(this->array[2]);
+		if(channel == 0)
+			filterBits->channel1 = filtered ? 1 : 0;
+		else
+			filterBits->channel2 = filtered ? 1 : 0;
 	}
-	/// \brief Set the trigger level.
-	/// \param level The new trigger level value.
-	void ControlSetOffset::setTrigger(unsigned short int level) {
-		this->array[4] = (unsigned char) (level >> 8);
-		this->array[5] = (unsigned char) level;
+	/// \brief Initialize the array to the needed values.
+	void BulkSetFilter2250::init() {
+		this->array[0] = BULK_BSETFILTER;
 	}
 	//////////////////////////////////////////////////////////////////////////////
-	// class BulkSetRelays
-	/// \brief Sets all relay states.
-	/// \param ch1Below1V Sets the state of the Channel 1 below 1 V relay.
-	/// \param ch1Below100mV Sets the state of the Channel 1 below 100 mV relay.
-	/// \param ch1CouplingDC Sets the state of the Channel 1 coupling relay.
-	/// \param ch2Below1V Sets the state of the Channel 2 below 1 V relay.
-	/// \param ch2Below100mV Sets the state of the Channel 2 below 100 mV relay.
-	/// \param ch2CouplingDC Sets the state of the Channel 2 coupling relay.
-	/// \param triggerExt Sets the state of the external trigger relay.
-	ControlSetRelays::ControlSetRelays(bool ch1Below1V, bool ch1Below100mV, bool ch1CouplingDC, bool ch2Below1V, bool ch2Below100mV, bool ch2CouplingDC, bool triggerExt) : Helper::DataArray<unsigned char>(17) {
-		this->setBelow1V(0, ch1Below1V);
-		this->setBelow100mV(0, ch1Below100mV);
-		this->setCoupling(0, ch1CouplingDC);
-		this->setBelow1V(1, ch2Below1V);
-		this->setBelow100mV(1, ch2Below100mV);
-		this->setCoupling(1, ch2CouplingDC);
-		this->setTrigger(triggerExt);
-	}
-	
-	/// \brief Get the below 1 V relay state for the given channel.
-	/// \param channel The channel whose relay state should be returned.
-	/// \return true, if the gain of the channel is below 1 V.
-	bool ControlSetRelays::getBelow1V(unsigned int channel) {
-		if(channel == 0)
-			return (this->array[1] & 0x04) == 0x00;
-		else
-			return (this->array[4] & 0x20) == 0x00;
-	}
-	
-	/// \brief Set the below 1 V relay for the given channel.
-	/// \param channel The channel that should be set.
-	/// \param below true, if the gain of the channel should be below 1 V.
-	void ControlSetRelays::setBelow1V(unsigned int channel, bool below) {
-		if(channel == 0)
-			this->array[1] = below ? 0xfb : 0x04;
-		else
-			this->array[4] = below ? 0xdf : 0x20;
+	// class BulkSetTrigger2250
+	/// \brief Sets the data array to needed values.
+	BulkSetTrigger2250::BulkSetTrigger2250() : Helper::DataArray<unsigned char>(8) {
+		this->init();
 	}
-	/// \brief Get the below 1 V relay state for the given channel.
-	/// \param channel The channel whose relay state should be returned.
-	/// \return true, if the gain of the channel is below 1 V.
-	bool ControlSetRelays::getBelow100mV(unsigned int channel) {
-		if(channel == 0)
-			return (this->array[2] & 0x08) == 0x00;
-		else
-			return (this->array[5] & 0x40) == 0x00;
+	/// \brief Sets the used channels.
+	/// \param triggerSource The trigger source id (CTriggerBits).
+	/// \param triggerSlope The triggerSlope value (CTriggerBits).
+	BulkSetTrigger2250::BulkSetTrigger2250(unsigned char triggerSource, unsigned char triggerSlope) : Helper::DataArray<unsigned char>(8) {
+		this->init();
+		
+		this->setTriggerSource(triggerSource);
+		this->setTriggerSlope(triggerSlope);
 	}
-	
-	/// \brief Set the below 100 mV relay for the given channel.
-	/// \param channel The channel that should be set.
-	/// \param below true, if the gain of the channel should be below 100 mV.
-	void ControlSetRelays::setBelow100mV(unsigned int channel, bool below) {
-		if(channel == 0)
-			this->array[2] = below ? 0xf7 : 0x08;
-		else
-			this->array[5] = below ? 0xbf : 0x40;
+			
+	/// \brief Get the triggerSource value in CTriggerBits.
+	/// \return The triggerSource value.
+	unsigned char BulkSetTrigger2250::getTriggerSource() {
+		return ((CTriggerBits *) &(this->array[2]))->triggerSource;
 	}
-	/// \brief Get the coupling relay state for the given channel.
-	/// \param channel The channel whose relay state should be returned.
-	/// \return true, if the coupling of the channel is DC.
-	bool ControlSetRelays::getCoupling(unsigned int channel) {
-		if(channel == 0)
-			return (this->array[3] & 0x02) == 0x00;
-		else
-			return (this->array[6] & 0x10) == 0x00;
+	/// \brief Set the triggerSource in CTriggerBits to the given value.
+	/// \param value The new triggerSource value.
+	void BulkSetTrigger2250::setTriggerSource(unsigned char value) {
+		((CTriggerBits *) &(this->array[2]))->triggerSource = value;
 	}
-	/// \brief Set the coupling relay for the given channel.
-	/// \param channel The channel that should be set.
-	/// \param dc true, if the coupling of the channel should be DC.
-	void ControlSetRelays::setCoupling(unsigned int channel, bool dc) {
-		if(channel == 0)
-			this->array[3] = dc ? 0xfd : 0x02;
-		else
-			this->array[6] = dc ? 0xef : 0x10;
+	/// \brief Get the triggerSlope value in CTriggerBits.
+	/// \return The triggerSlope value.
+	unsigned char BulkSetTrigger2250::getTriggerSlope() {
+		return ((CTriggerBits *) &(this->array[2]))->triggerSlope;
 	}
-	/// \brief Get the external trigger relay state.
-	/// \return true, if the trigger is external (EXT-Connector).
-	bool ControlSetRelays::getTrigger() {
-		return (this->array[7] & 0x01) == 0x00;
+	/// \brief Set the triggerSlope in CTriggerBits to the given value.
+	/// \param slope The new triggerSlope value.
+	void BulkSetTrigger2250::setTriggerSlope(unsigned char slope) {
+		((CTriggerBits *) &(this->array[2]))->triggerSlope = slope;
 	}
-	
-	/// \brief Set the external trigger relay.
-	/// \param ext true, if the trigger should be external (EXT-Connector).
-	void ControlSetRelays::setTrigger(bool ext) {
-		this->array[7] = ext ? 0xfe : 0x01;
+		
+	/// \brief Initialize the array to the needed values.
+	void BulkSetTrigger2250::init() {
+		this->array[0] = BULK_CSETTRIGGERORSAMPLERATE;
 	}
@@ -607,7 +511,40 @@ namespace Hantek {
 	/// \brief Initialize the array to the needed values.
 	void BulkSetSamplerate5200::init() {
-		this->array[0] = BULK_SETSAMPLERATE5200;
+		this->array[0] = BULK_CSETTRIGGERORSAMPLERATE;
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	// class BulkSetBuffer2250
+	/// \brief Sets the data array to the default values.
+	BulkSetRecordLength2250::BulkSetRecordLength2250() : Helper::DataArray<unsigned char>(4) {
+		this->init();
+	}
+	
+	/// \brief Sets the data bytes to the specified values.
+	/// \param recordLength The ::RecordLengthId value.
+	BulkSetRecordLength2250::BulkSetRecordLength2250(unsigned char recordLength) : Helper::DataArray<unsigned char>(4) {
+		this->init();
+		
+		this->setRecordLength(recordLength);
+	}
+	
+	/// \brief Get the ::RecordLengthId value.
+	/// \return The ::RecordLengthId value.
+	unsigned char BulkSetRecordLength2250::getRecordLength() {
+		return this->array[2];
+	}
+	
+	/// \brief Set the ::RecordLengthId to the given value.
+	/// \param value The new ::RecordLengthId value.
+	void BulkSetRecordLength2250::setRecordLength(unsigned char value) {
+		this->array[2] = value;
+	}
+	
+	/// \brief Initialize the array to the needed values.
+	void BulkSetRecordLength2250::init() {
+		this->array[0] = BULK_DSETBUFFER;
 	}
@@ -623,15 +560,15 @@ namespace Hantek {
 	/// \param triggerPositionPost The TriggerPositionPost value.
 	/// \param usedPre The TriggerPositionUsedPre value.
 	/// \param usedPost The TriggerPositionUsedPost value.
-	/// \param bufferSize The ::BufferSizeId value.
-	BulkSetBuffer5200::BulkSetBuffer5200(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre, unsigned char usedPost, unsigned char bufferSize) : Helper::DataArray<unsigned char>(10) {
+	/// \param recordLength The ::RecordLengthId value.
+	BulkSetBuffer5200::BulkSetBuffer5200(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre, unsigned char usedPost, unsigned char recordLength) : Helper::DataArray<unsigned char>(10) {
 		this->init();
 		this->setTriggerPositionPre(triggerPositionPre);
 		this->setTriggerPositionPost(triggerPositionPost);
 		this->setUsedPre(usedPre);
 		this->setUsedPost(usedPost);
-		this->setBufferSize(bufferSize);
+		this->setRecordLength(recordLength);
 	}
 	/// \brief Get the TriggerPositionPre value.
@@ -684,27 +621,89 @@ namespace Hantek {
 		((DBufferBits *) &(this->array[8]))->triggerPositionUsed = value;
 	}
-	/// \brief Get the bufferSize value in DBufferBits.
-	/// \return The ::BufferSizeId value.
-	unsigned char BulkSetBuffer5200::getBufferSize() {
-		return ((DBufferBits *) &(this->array[8]))->bufferSize;
+	/// \brief Get the recordLength value in DBufferBits.
+	/// \return The ::RecordLengthId value.
+	unsigned char BulkSetBuffer5200::getRecordLength() {
+		return ((DBufferBits *) &(this->array[8]))->recordLength;
 	}
-	/// \brief Set the bufferSize in DBufferBits to the given value.
-	/// \param value The new ::BufferSizeId value.
-	void BulkSetBuffer5200::setBufferSize(unsigned char value) {
-		((DBufferBits *) &(this->array[8]))->bufferSize = value;
+	/// \brief Set the recordLength in DBufferBits to the given value.
+	/// \param value The new ::RecordLengthId value.
+	void BulkSetBuffer5200::setRecordLength(unsigned char value) {
+		((DBufferBits *) &(this->array[8]))->recordLength = value;
 	}
 	/// \brief Initialize the array to the needed values.
 	void BulkSetBuffer5200::init() {
-		this->array[0] = BULK_SETBUFFER5200;
+		this->array[0] = BULK_DSETBUFFER;
 		this->array[5] = 0xff;
 		this->array[9] = 0xff;
 	}
 	//////////////////////////////////////////////////////////////////////////////
+	// class BulkSetSamplerate2250
+	/// \brief Sets the data array to the default values.
+	BulkSetSamplerate2250::BulkSetSamplerate2250() : Helper::DataArray<unsigned char>(8) {
+		this->init();
+	}
+	
+	/// \brief Sets the data bytes to the specified values.
+	/// \param fastRate The fastRate state (ESamplerateBits).
+	/// \param samplerateFast The SamplerateFast value (ESamplerateBits).
+	/// \param samplerateSlow The SamplerateSlow value.
+	BulkSetSamplerate2250::BulkSetSamplerate2250(bool fastRate, unsigned char samplerateFast, unsigned short int samplerateSlow) : Helper::DataArray<unsigned char>(8) {
+		this->init();
+		
+		this->setFastRate(fastRate);
+		this->setSamplerateFast(samplerateFast);
+		this->setSamplerateSlow(samplerateSlow);
+	}
+	
+	/// \brief Get the fastRate state in ESamplerateBits.
+	/// \return The fastRate state.
+	bool BulkSetSamplerate2250::getFastRate() {
+		return ((ESamplerateBits *) &(this->array[2]))->fastRate == 1;
+	}
+	
+	/// \brief Set the fastRate in ESamplerateBits to the given state.
+	/// \param fastRate The new fastRate state.
+	void BulkSetSamplerate2250::setFastRate(bool fastRate) {
+		((ESamplerateBits *) &(this->array[2]))->fastRate = fastRate ? 1 : 0;
+	}
+	
+	/// \brief Get the samplerateFast value in ESamplerateBits.
+	/// \return The samplerateFast value in ESamplerateBits.
+	unsigned char BulkSetSamplerate2250::getSamplerateFast() {
+		return ((ESamplerateBits *) &(this->array[2]))->samplerateFast;
+	}
+	
+	/// \brief Set the samplerateFast in ESamplerateBits to the given value.
+	/// \param value The new samplerateFast value.
+	void BulkSetSamplerate2250::setSamplerateFast(unsigned char value) {
+		((ESamplerateBits *) &(this->array[2]))->samplerateFast = value;
+	}
+	
+	/// \brief Get the SamplerateSlow value.
+	/// \return The SamplerateSlow value.
+	unsigned short int BulkSetSamplerate2250::getSamplerateSlow() {
+		return (unsigned short int) this->array[4] | ((unsigned short int) this->array[5] << 8);
+	}
+	
+	/// \brief Set the SamplerateSlow to the given value.
+	/// \param samplerate The new SamplerateSlow value.
+	void BulkSetSamplerate2250::setSamplerateSlow(unsigned short int samplerate) {
+		this->array[4] = (unsigned char) samplerate;
+		this->array[5] = (unsigned char) (samplerate >> 8);
+	}
+	
+	/// \brief Initialize the array to the needed values.
+	void BulkSetSamplerate2250::init() {
+		this->array[0] = BULK_ESETTRIGGERORSAMPLERATE;
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
 	// class BulkSetTrigger5200
 	/// \brief Sets the data array to the default values.
 	BulkSetTrigger5200::BulkSetTrigger5200() : Helper::DataArray<unsigned char>(8) {
@@ -789,7 +788,301 @@ namespace Hantek {
 	/// \brief Initialize the array to the needed values.
 	void BulkSetTrigger5200::init() {
-		this->array[0] = BULK_SETTRIGGER5200;
+		this->array[0] = BULK_ESETTRIGGERORSAMPLERATE;
 		this->array[4] = 0x02;
 	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetBuffer2250                                    hantek/types.h
+	/// \brief The DSO-2250 BULK_FSETBUFFER builder.
+	/// \brief Sets the data array to the default values.
+	BulkSetBuffer2250::BulkSetBuffer2250() : Helper::DataArray<unsigned char>(10) {
+		this->init();
+	}
+	
+	/// \brief Sets the data bytes to the specified values.
+	/// \param triggerPositionPre The TriggerPositionPre value.
+	/// \param triggerPositionPost The TriggerPositionPost value.
+	/// \param usedPre The TriggerPositionUsedPre value.
+	/// \param usedPost The TriggerPositionUsedPost value.
+	/// \param largeBuffer The largeBuffer state.
+	/// \param slowBuffer The slowBuffer state.
+	BulkSetBuffer2250::BulkSetBuffer2250(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre, unsigned char usedPost, bool largeBuffer, bool slowBuffer) : Helper::DataArray<unsigned char>(10) {
+		this->init();
+		
+		this->setTriggerPositionPre(triggerPositionPre);
+		this->setTriggerPositionPost(triggerPositionPost);
+		this->setUsedPre(usedPre);
+		this->setUsedPost(usedPost);
+		this->setLargeBuffer(largeBuffer);
+		this->setSlowBuffer(slowBuffer);
+	}
+	
+	/// \brief Get the TriggerPositionPre value.
+	/// \return The TriggerPositionPre value.
+	unsigned short int BulkSetBuffer2250::getTriggerPositionPre() {
+		return (unsigned short int) this->array[2] | ((unsigned short int) this->array[3] << 8);
+	}
+	
+	/// \brief Set the TriggerPositionPre to the given value.
+	/// \param position The new TriggerPositionPre value.
+	void BulkSetBuffer2250::setTriggerPositionPre(unsigned short int position) {
+		this->array[2] = (unsigned char) position;
+		this->array[3] = (unsigned char) (position >> 8);
+	}
+	
+	/// \brief Get the TriggerPositionPost value.
+	/// \return The TriggerPositionPost value.
+	unsigned short int BulkSetBuffer2250::getTriggerPositionPost() {
+		return (unsigned short int) this->array[6] | ((unsigned short int) this->array[7] << 8);
+	}
+	
+	/// \brief Set the TriggerPositionPost to the given value.
+	/// \param position The new TriggerPositionPost value.
+	void BulkSetBuffer2250::setTriggerPositionPost(unsigned short int position) {
+		this->array[6] = (unsigned char) position;
+		this->array[7] = (unsigned char) (position >> 8);
+	}
+	
+	/// \brief Get the TriggerPositionUsedPre value.
+	/// \return The ::DTriggerPositionUsed value for the pre position.
+	unsigned char BulkSetBuffer2250::getUsedPre() {
+		return ((FBuffer1Bits *) &(this->array[4]))->triggerPositionUsed;
+	}
+	
+	/// \brief Set the TriggerPositionUsedPre to the given value.
+	/// \param value The new ::DTriggerPositionUsed value for the pre position.
+	void BulkSetBuffer2250::setUsedPre(unsigned char value) {
+		((FBuffer1Bits *) &(this->array[4]))->triggerPositionUsed = value;
+	}
+	
+	/// \brief Get the TriggerPositionUsedPost value.
+	/// \return The ::DTriggerPositionUsed value for the post position.
+	unsigned char BulkSetBuffer2250::getUsedPost() {
+		return ((FBuffer1Bits *) &(this->array[8]))->triggerPositionUsed;
+	}
+	
+	/// \brief Set the TriggerPositionUsedPost to the given value.
+	/// \param value The new ::DTriggerPositionUsed value for the post position.
+	void BulkSetBuffer2250::setUsedPost(unsigned char value) {
+		((FBuffer1Bits *) &(this->array[8]))->triggerPositionUsed = value;
+	}
+	
+	/// \brief Get the largeBuffer state in FBuffer1Bits.
+	/// \return The largeBuffer state.
+	bool BulkSetBuffer2250::getLargeBuffer() {
+		return ((FBuffer1Bits *) &(this->array[2]))->largeBuffer == 0;
+	}
+	
+	/// \brief Set the largeBuffer in FBuffer1Bits to the given state.
+	/// \param largeBuffer The new largeBuffer state.
+	void BulkSetBuffer2250::setLargeBuffer(bool largeBuffer) {
+		((FBuffer1Bits *) &(this->array[2]))->largeBuffer = largeBuffer ? 0 : 1;
+	}
+	
+	/// \brief Get the slowBuffer state in FBuffer2Bits.
+	/// \return The slowBuffer state.
+	bool BulkSetBuffer2250::getSlowBuffer() {
+		return ((FBuffer2Bits *) &(this->array[2]))->slowBuffer == 1;
+	}
+	
+	/// \brief Set the slowBuffer in FBuffer2Bits to the given state.
+	/// \param slowBuffer The new slowBuffer state.
+	void BulkSetBuffer2250::setSlowBuffer(bool slowBuffer) {
+		((FBuffer2Bits *) &(this->array[2]))->slowBuffer = slowBuffer ? 1 : 0;
+	}
+	
+	/// \brief Initialize the array to the needed values.
+	void BulkSetBuffer2250::init() {
+		this->array[0] = BULK_FSETBUFFER;
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	// class ControlGetSpeed
+	/// \brief Initializes the array.
+	ControlGetSpeed::ControlGetSpeed() : Helper::DataArray<unsigned char>(10) {
+	}
+	
+	/// \brief Gets the speed of the connection.
+	/// \return The speed level of the USB connection.
+	ConnectionSpeed ControlGetSpeed::getSpeed() {
+		return (ConnectionSpeed) this->array[0];
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	// class ControlBeginCommand
+	/// \brief Sets the command index to the given value.
+	/// \param index The CommandIndex for the command.
+	ControlBeginCommand::ControlBeginCommand(BulkIndex index) : Helper::DataArray<unsigned char>(10) {
+		this->init();
+		
+		this->setIndex(index);
+	}
+	
+	/// \brief Gets the command index.
+	/// \return The CommandIndex for the command.
+	BulkIndex ControlBeginCommand::getIndex() {
+		return (BulkIndex) this->array[1];
+	}
+	
+	/// \brief Sets the command index to the given value.
+	/// \param index The new CommandIndex for the command.
+	void ControlBeginCommand::setIndex(BulkIndex index) {
+		memset(&(this->array[1]), (unsigned char) index, 3);
+	}
+	
+	/// \brief Initialize the array to the needed values.
+	void ControlBeginCommand::init() {
+		this->array[0] = 0x0f;
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	// class ControlSetOffset
+	/// \brief Sets the data array to the default values.
+	ControlSetOffset::ControlSetOffset() : Helper::DataArray<unsigned char>(17) {
+	}
+	
+	/// \brief Sets the offsets to the given values.
+	/// \param channel1 The offset for channel 1.
+	/// \param channel2 The offset for channel 2.
+	/// \param trigger The offset for ext. trigger.
+	ControlSetOffset::ControlSetOffset(unsigned short int channel1, unsigned short int channel2, unsigned short int trigger) : Helper::DataArray<unsigned char>(17) {
+		this->setChannel(0, channel1);
+		this->setChannel(1, channel2);
+		this->setTrigger(trigger);
+	}
+	
+	/// \brief Get the offset for the given channel.
+	/// \param channel The channel whose offset should be returned.
+	/// \return The channel offset value.
+	unsigned short int ControlSetOffset::getChannel(unsigned int channel) {
+		if(channel == 0)
+			return ((this->array[0] & 0x0f) << 8) | this->array[1];
+		else
+			return ((this->array[2] & 0x0f) << 8) | this->array[3];
+	}
+	
+	/// \brief Set the offset for the given channel.
+	/// \param channel The channel that should be set.
+	/// \param offset The new channel offset value.
+	void ControlSetOffset::setChannel(unsigned int channel, unsigned short int offset) {
+		if(channel == 0) {
+			this->array[0] = (unsigned char) (offset >> 8);
+			this->array[1] = (unsigned char) offset;
+		}
+		else {
+			this->array[2] = (unsigned char) (offset >> 8);
+			this->array[3] = (unsigned char) offset;
+		}
+	}
+	
+	/// \brief Get the trigger level.
+	/// \return The trigger level value.
+	unsigned short int ControlSetOffset::getTrigger() {
+		return ((this->array[4] & 0x0f) << 8) | this->array[5];
+	}
+	
+	/// \brief Set the trigger level.
+	/// \param level The new trigger level value.
+	void ControlSetOffset::setTrigger(unsigned short int level) {
+		this->array[4] = (unsigned char) (level >> 8);
+		this->array[5] = (unsigned char) level;
+	}
+	
+	
+	//////////////////////////////////////////////////////////////////////////////
+	// class ControlSetRelays
+	/// \brief Sets all relay states.
+	/// \param ch1Below1V Sets the state of the Channel 1 below 1 V relay.
+	/// \param ch1Below100mV Sets the state of the Channel 1 below 100 mV relay.
+	/// \param ch1CouplingDC Sets the state of the Channel 1 coupling relay.
+	/// \param ch2Below1V Sets the state of the Channel 2 below 1 V relay.
+	/// \param ch2Below100mV Sets the state of the Channel 2 below 100 mV relay.
+	/// \param ch2CouplingDC Sets the state of the Channel 2 coupling relay.
+	/// \param triggerExt Sets the state of the external trigger relay.
+	ControlSetRelays::ControlSetRelays(bool ch1Below1V, bool ch1Below100mV, bool ch1CouplingDC, bool ch2Below1V, bool ch2Below100mV, bool ch2CouplingDC, bool triggerExt) : Helper::DataArray<unsigned char>(17) {
+		this->setBelow1V(0, ch1Below1V);
+		this->setBelow100mV(0, ch1Below100mV);
+		this->setCoupling(0, ch1CouplingDC);
+		this->setBelow1V(1, ch2Below1V);
+		this->setBelow100mV(1, ch2Below100mV);
+		this->setCoupling(1, ch2CouplingDC);
+		this->setTrigger(triggerExt);
+	}
+	
+	/// \brief Get the below 1 V relay state for the given channel.
+	/// \param channel The channel whose relay state should be returned.
+	/// \return true, if the gain of the channel is below 1 V.
+	bool ControlSetRelays::getBelow1V(unsigned int channel) {
+		if(channel == 0)
+			return (this->array[1] & 0x04) == 0x00;
+		else
+			return (this->array[4] & 0x20) == 0x00;
+	}
+	
+	/// \brief Set the below 1 V relay for the given channel.
+	/// \param channel The channel that should be set.
+	/// \param below true, if the gain of the channel should be below 1 V.
+	void ControlSetRelays::setBelow1V(unsigned int channel, bool below) {
+		if(channel == 0)
+			this->array[1] = below ? 0xfb : 0x04;
+		else
+			this->array[4] = below ? 0xdf : 0x20;
+	}
+	
+	/// \brief Get the below 1 V relay state for the given channel.
+	/// \param channel The channel whose relay state should be returned.
+	/// \return true, if the gain of the channel is below 1 V.
+	bool ControlSetRelays::getBelow100mV(unsigned int channel) {
+		if(channel == 0)
+			return (this->array[2] & 0x08) == 0x00;
+		else
+			return (this->array[5] & 0x40) == 0x00;
+	}
+	
+	/// \brief Set the below 100 mV relay for the given channel.
+	/// \param channel The channel that should be set.
+	/// \param below true, if the gain of the channel should be below 100 mV.
+	void ControlSetRelays::setBelow100mV(unsigned int channel, bool below) {
+		if(channel == 0)
+			this->array[2] = below ? 0xf7 : 0x08;
+		else
+			this->array[5] = below ? 0xbf : 0x40;
+	}
+	
+	/// \brief Get the coupling relay state for the given channel.
+	/// \param channel The channel whose relay state should be returned.
+	/// \return true, if the coupling of the channel is DC.
+	bool ControlSetRelays::getCoupling(unsigned int channel) {
+		if(channel == 0)
+			return (this->array[3] & 0x02) == 0x00;
+		else
+			return (this->array[6] & 0x10) == 0x00;
+	}
+	
+	/// \brief Set the coupling relay for the given channel.
+	/// \param channel The channel that should be set.
+	/// \param dc true, if the coupling of the channel should be DC.
+	void ControlSetRelays::setCoupling(unsigned int channel, bool dc) {
+		if(channel == 0)
+			this->array[3] = dc ? 0xfd : 0x02;
+		else
+			this->array[6] = dc ? 0xef : 0x10;
+	}
+	
+	/// \brief Get the external trigger relay state.
+	/// \return true, if the trigger is external (EXT-Connector).
+	bool ControlSetRelays::getTrigger() {
+		return (this->array[7] & 0x01) == 0x00;
+	}
+	
+	/// \brief Set the external trigger relay.
+	/// \param ext true, if the trigger should be external (EXT-Connector).
+	void ControlSetRelays::setTrigger(bool ext) {
+		this->array[7] = ext ? 0xfe : 0x01;
+	}
 }
@@ -51,7 +51,7 @@ namespace Hantek {
 	/// \brief All supported bulk commands.
 	/// Indicies given in square brackets specify byte numbers in little endian format.
 	enum BulkCode {
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkSetFilter [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command sets channel and trigger filter:
 		///   <table>
@@ -70,7 +70,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_SETFILTER,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150]</em>
+		/// BulkSetTriggerAndSamplerate [<em>::MODEL_DSO2090, ::MODEL_DSO2150</em>]
 		/// <p>
 		///   This command sets trigger and timebase:
 		///   <table>
@@ -99,7 +99,7 @@ namespace Hantek {
 		///   Without using fast rate mode, the samplerate is:<br />
 		///   <i>Samplerate = SamplerateMax / (1comp(SamplerateSlow) * 2 + Tsr1Bits.samplerateFast)</i><br />
 		///   SamplerateMax is 50 MHz for the DSO-2090.<br />
-		///   When using fast rate mode the resulting samplerate is twice (For DSO-2150 three times) as fast, when using the large buffer it is half as fast. When Tsr1Bits.bufferSize is 0 (Roll mode) the sampling rate is divided by 1000. Setting Tsr1Bits.samplerateFast to 0 doesn't work, the result will be the same as Tsr1Bits.samplerateFast = 1. SamplerateSlow can't be used together with fast rate mode, the result is always the the same as SlowValue = 0.
+		///   When using fast rate mode the resulting samplerate is twice (For DSO-2150 three times) as fast, when using the large buffer it is half as fast. When Tsr1Bits.recordLength is 0 (Roll mode) the sampling rate is divided by 1000. Setting Tsr1Bits.samplerateFast to 0 doesn't work, the result will be the same as Tsr1Bits.samplerateFast = 1. SamplerateSlow can't be used together with fast rate mode, the result is always the the same as SlowValue = 0.
 		/// </p>
 		/// <p>
 		///   The TriggerPosition sets the position of the pretrigger in samples. The left side (0 %) is 0x77660 when using the small buffer and 0x78000 when using the large buffer.
@@ -107,7 +107,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_SETTRIGGERANDSAMPLERATE,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkForceTrigger [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command forces triggering:
 		///   <table>
@@ -120,7 +120,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_FORCETRIGGER,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkCaptureStart [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command starts to capture data:
 		///   <table>
@@ -133,7 +133,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_STARTSAMPLING,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkTriggerEnabled [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command sets the trigger:
 		///   <table>
@@ -146,7 +146,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_ENABLETRIGGER,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkGetData [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command reads data from the hardware:
 		///   <table>
@@ -194,7 +194,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_GETDATA,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkGetCaptureState [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command checks the capture state:
 		///   <table>
@@ -219,7 +219,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_GETCAPTURESTATE,
-		/// <em>[::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkSetGain [<em>::MODEL_DSO2090, ::MODEL_DSO2150, ::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command sets the gain:
 		///   <table>
@@ -239,9 +239,9 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_SETGAIN,
-		/// <em>[]</em>
+		/// BulkSetLogicalData [<em></em>]
 		/// <p>
-		///   This command sets the logical data (Not used in official Hantek software):
+		///   This command sets the logical data (Not used in official %Hantek software):
 		///   <table>
 		///     <tr>
 		///       <td>0x08</td>
@@ -258,9 +258,9 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_SETLOGICALDATA,
-		/// <em>[::MODEL_DSO2250]</em>
+		/// BulkGetLogicalData [<em></em>]
 		/// <p>
-		///   This command reads the logical data (Not used in official Hantek software):
+		///   This command reads the logical data (Not used in official %Hantek software):
 		///   <table>
 		///     <tr>
 		///       <td>0x09</td>
@@ -280,7 +280,7 @@ namespace Hantek {
 		/// <p><br /></p>
 		BULK_GETLOGICALDATA,
-		/// <em>[]</em>
+		/// [<em></em>]
 		/// <p>
 		///   This command isn't used for any supported model:
 		///   <table>
@@ -291,24 +291,41 @@ namespace Hantek {
 		///   </table>
 		/// </p>
 		/// <p><br /></p>
-		BULK_UNKNOWN_0A,
+		BULK_AUNKNOWN,
-		/// <em>[::MODEL_DSO2250]</em>
+		/// BulkSetFilter2250 [<em>::MODEL_DSO2250</em>]
 		/// <p>
-		///   This command is used for the DSO-2250:
+		///   This command sets the activated channels for the DSO-2250:
 		///   <table>
 		///     <tr>
 		///       <td>0x0b</td>
 		///       <td>0x00</td>
-		///       <td>(unknown)</td>
+		///       <td>::UsedChannels</td>
 		///       <td>0x00</td>
 		///     </tr>
 		///   </table>
 		/// </p>
 		/// <p><br /></p>
-		BULK_UNKNOWN_0B,
+		BULK_BSETFILTER,
-		/// <em>[::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkSetTrigger2250 [<em>::MODEL_DSO2250</em>]
+		/// <p>
+		///   This command sets the trigger source for the DSO-2250:
+		///   <table>
+		///     <tr>
+		///       <td>0x0c</td>
+		///       <td>0x0f</td>
+		///       <td>CTriggerBits</td>
+		///       <td>0x00</td>
+		///       <td>0x02</td>
+		///       <td>0x00</td>
+		///       <td>0x00</td>
+		///       <td>0x00</td>
+		///     </tr>
+		///   </table>
+		/// </p>
+		/// <p><br /></p>
+		/// BulkSetSamplerate5200 [<em>::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
 		///   This command sets the sampling rate for the DSO-5200:
 		///   <table>
@@ -325,14 +342,27 @@ namespace Hantek {
 		/// <p>
 		///   The values are similar to the ones used with ::BULK_SETTRIGGERANDSAMPLERATE. The formula is a bit different here:<br />
 		///   <i>Samplerate = SamplerateMax / (2comp(SamplerateSlow) * 2 + 4 - SamplerateFast)</i><br />
-		///   SamplerateMax is 100 MS/s for the DSO-5200 in default configuration and 250 MS/s in fast rate mode though, the modifications regarding buffer size are the the same that apply for the DSO-2090.
+		///   SamplerateMax is 100 MS/s for the DSO-5200 in default configuration and 250 MS/s in fast rate mode though, the modifications regarding record length are the the same that apply for the DSO-2090.
 		/// </p>
 		/// <p><br /></p>
-		BULK_SETSAMPLERATE5200,
-		
-		/// <em>[::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		BULK_CSETTRIGGERORSAMPLERATE,
+
+		/// BulkSetRecordLength2250 [<em>::MODEL_DSO2250</em>]
+		/// <p>
+		///   This command sets the record length for the DSO-2250:
+		///   <table>
+		///     <tr>
+		///       <td>0x0d</td>
+		///       <td>0x00</td>
+		///       <td>::RecordLengthId</td>
+		///       <td>0x00</td>
+		///     </tr>
+		///   </table>
+		/// </p>
+		/// <p><br /></p>
+		/// BulkSetBuffer5200 [<em>::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
 		/// <p>
-		///   This command sets the trigger position and buffer size for the DSO-5200:
+		///   This command sets the trigger position and record length for the DSO-5200:
 		///   <table>
 		///     <tr>
 		///       <td>0x0d</td>
@@ -356,18 +386,40 @@ namespace Hantek {
 		///   The TriggerPositionPre and TriggerPositionPost values set the pretrigger position. Both values have a range from 0xd7ff (0xc7ff for 14 kiS buffer) to 0xfffe. On the left side (0 %) the TriggerPositionPre value is minimal, on the right side (100 %) it is maximal. The TriggerPositionPost value is maximal for 0 % and minimal for 100%.
 		/// </p>
 		/// <p><br /></p>
-		BULK_SETBUFFER5200,
+		BULK_DSETBUFFER,
-		/// <em>[::MODEL_DSO2250, ::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
+		/// BulkSetSamplerate2250 [<em>::MODEL_DSO2250</em>]
+		/// <p>
+		///   This command sets the samplerate:
+		///   <table>
+		///     <tr>
+		///       <td>0x0e</td>
+		///       <td>0x00</td>
+		///       <td>ESamplerateBits</td>
+		///       <td>0x00</td>
+		///       <td>SamplerateSlow[0]</td>
+		///       <td>SamplerateSlow[1]</td>
+		///       <td>0x00</td>
+		///       <td>0x00</td>
+		///     </tr>
+		///   </table>
+		/// </p>
 		/// <p>
-		///   This command sets the channel and trigger settings for the DSO-5200:
+		///   The values are similar to the ones used with ::BULK_SETTRIGGERANDSAMPLERATE. The formula is a bit different here:<br />
+		///   <i>Samplerate = SamplerateMax / (2comp(SamplerateSlow) * 2 + ESamplerateBits.samplerateFast)</i><br />
+		///   SamplerateMax is 100 MS/s for the DSO-2250 in default configuration and 250 MS/s in fast rate mode though, the modifications regarding record length are the the same that apply for the DSO-2090.
+		/// </p>
+		/// <p><br /></p>
+		/// BulkSetTrigger5200 [<em>::MODEL_DSO5200, ::MODEL_DSO5200A</em>]
+		/// <p>
+		///   This command sets the channel and trigger settings:
 		///   <table>
 		///     <tr>
 		///       <td>0x0e</td>
 		///       <td>0x00</td>
 		///       <td>ETsrBits</td>
 		///       <td>0x00</td>
-		///       <td>Unknown (0x02)</td>
+		///       <td>0x00</td>
 		///       <td>0x00</td>
 		///       <td>0x00</td>
 		///       <td>0x00</td>
@@ -375,34 +427,37 @@ namespace Hantek {
 		///   </table>
 		/// </p>
 		/// <p><br /></p>
-		BULK_SETTRIGGER5200,
+		BULK_ESETTRIGGERORSAMPLERATE,
-		/// <em>[::MODEL_DSO2250]</em>
+		/// BulkSetBuffer2250 [<em>::MODEL_DSO2250</em>]
 		/// <p>
-		///   This command is used for the DSO-2250:
+		///   This command sets the trigger position and buffer configuration for the DSO-2250:
 		///   <table>
 		///     <tr>
 		///       <td>0x0f</td>
 		///       <td>0x00</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
+		///       <td>TriggerPositionPre[0]</td>
+		///       <td>TriggerPositionPre[1]</td>
+		///       <td>FBuffer1Bits</td>
+		///       <td>0x00</td>
 		///     </tr>
 		///   </table>
 		///   <table>
 		///     <tr>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
-		///       <td>(unknown)</td>
+		///       <td>TriggerPositionPost[0]</td>
+		///       <td>TriggerPositionPost[1]</td>
+		///       <td>FBuffer1Bits</td>
+		///       <td>0x00</td>
+		///       <td>FBuffer2Bits</td>
+		///       <td>0x00</td>
 		///     </tr>
 		///   </table>
 		/// </p>
+		/// <p>
+		///   The TriggerPositionPre and TriggerPositionPost values set the pretrigger position. Both values have a range from 0xd7ff (0xc7ff for 14 kiS buffer) to 0xfffe. On the left side (0 %) the TriggerPositionPre value is minimal, on the right side (100 %) it is maximal. The TriggerPositionPost value is maximal for 0 % and minimal for 100%.
+		/// </p>
 		/// <p><br /></p>
-		BULK_UNKNOWN_0F,
+		BULK_FSETBUFFER,
 		BULK_COUNT
 	};
@@ -556,14 +611,14 @@ namespace Hantek {
 		/// Value 0x60 is the calibration data for the fast rate mode on the DSO-2250, DSO-5200 and DSO-5200A. It's used to correct the level differences between the two merged channels to avoid deterministic noise.
 		/// </p>
 		/// <p><br /></p>
-		VALUE_CALIBRATIONDATA = 0x60,
+		VALUE_FASTRATECALIBRATION = 0x60,
 		/// <em>[::MODEL_DSO5200, ::MODEL_DSO5200A]</em>
 		/// <p>
 		/// Value 0x70 contains correction values for the ETS functionality of the DSO-5200 and DSO-5200A.
 		/// </p>
 		/// <p><br /></p>
-		VALUE_VOLTAGELIMITS = 0x70
+		VALUE_ETSCORRECTION = 0x70
 	};
 	//////////////////////////////////////////////////////////////////////////////
@@ -591,8 +646,10 @@ namespace Hantek {
 	/// \enum UsedChannels                                          hantek/types.h
 	/// \brief The enabled channels.
 	enum UsedChannels {
-		USED_CH1, USED_CH2,
-		USED_CH1CH2
+		USED_CH1,    ///< Only channel 1 is activated
+		USED_CH2,    ///< Only channel 2 is activated
+		USED_CH1CH2, ///< Channel 1 and 2 are both activated
+		USED_NONE    ///< No channels are activated
 	};
 	//////////////////////////////////////////////////////////////////////////////
@@ -605,21 +662,12 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
-	/// \enum BufferSize                                            hantek/types.h
-	/// \brief The size of the sample buffer.
-	enum BufferSize {
-		BUFFER_SMALL = 10240,
-		BUFFER_LARGE5200 = 14336,
-		BUFFER_LARGE = 32768
-	};
-	
-	//////////////////////////////////////////////////////////////////////////////
-	/// \enum BufferSizeId                                          hantek/types.h
+	/// \enum RecordLengthId                                        hantek/types.h
 	/// \brief The size id for CommandSetTriggerAndSamplerate.
-	enum BufferSizeId {
-		BUFFERID_ROLL = 0, ///< Used for the roll mode
-		BUFFERID_SMALL, ///< The standard buffer with 10240 samples
-		BUFFERID_LARGE ///< The large buffer, 32768 samples (14336 for DSO-5200)
+	enum RecordLengthId {
+		RECORDLENGTHID_ROLL = 0, ///< Used for the roll mode
+		RECORDLENGTHID_SMALL, ///< The standard buffer with 10240 samples
+		RECORDLENGTHID_LARGE ///< The large buffer, 32768 samples (14336 for DSO-5200)
 	};
 	//////////////////////////////////////////////////////////////////////////////
@@ -662,6 +710,14 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \enum FTriggerPositionUsed                                  hantek/types.h
+	/// \brief The trigger position states for the 0x0f command.
+	enum FTriggerPositionUsed {
+		FTRIGGERPOSITION_OFF = 0, ///< Used for Roll mode
+		FTRIGGERPOSITION_ON = 3 ///< Used for normal operation
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \struct FilterBits                                          hantek/types.h
 	/// \brief The bits for BULK_SETFILTER.
 	struct FilterBits {
@@ -685,7 +741,7 @@ namespace Hantek {
 	/// \brief Trigger and samplerate bits (Byte 1).
 	struct Tsr1Bits {
 		unsigned char triggerSource:2; ///< The trigger source, see Hantek::TriggerSource
-		unsigned char bufferSize:3; ///< See ::BufferSizeId
+		unsigned char recordLength:3; ///< See ::RecordLengthId
 		unsigned char samplerateFast:3; ///< samplerate value for fast sampling rates
 	};
@@ -700,17 +756,35 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \struct CTriggerBits                                        hantek/types.h
+	/// \brief Trigger bits for 0x0c command.
+	struct CTriggerBits {
+		unsigned char triggerSource:2; ///< The trigger source, see Hantek::TriggerSource
+		unsigned char triggerSlope:1; ///< The trigger slope, see Dso::Slope
+		unsigned char reserved:5; ///< Unused bits
+	};
+
+	//////////////////////////////////////////////////////////////////////////////
 	/// \struct DBufferBits                                         hantek/types.h
 	/// \brief Buffer mode bits for 0x0d command.
 	struct DBufferBits {
 		unsigned char triggerPositionUsed:3; ///< See ::DTriggerPositionUsed
-		unsigned char bufferSize:3; ///< See ::BufferSizeId
+		unsigned char recordLength:3; ///< See ::RecordLengthId
 		unsigned char reserved:2; ///< Unused bits
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \struct ESamplerateBits                                     hantek/types.h
+	/// \brief Samplerate bits for DSO-2250 0x0e command.
+	struct ESamplerateBits {
+		unsigned char fastRate:1; ///< false, if one channels uses all buffers
+		unsigned char samplerateFast:3; ///< samplerate value for fast sampling rates
+		unsigned char reserved:4; ///< Unused bits
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \struct ETsrBits                                            hantek/types.h
-	/// \brief Trigger and samplerate bits for 0x0e command.
+	/// \brief Trigger and samplerate bits for DSO-5200/DSO-5200A 0x0e command.
 	struct ETsrBits {
 		unsigned char fastRate:1; ///< false, if one channels uses all buffers
 		unsigned char usedChannels:2; ///< Used channels, see Hantek::UsedChannels
@@ -720,6 +794,23 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \struct FBuffer1Bits                                        hantek/types.h
+	/// \brief Buffer mode bits for 0x0f command (Byte 1).
+	struct FBuffer1Bits {
+		unsigned char triggerPositionUsed:2; ///< See ::DTriggerPositionUsed
+		unsigned char largeBuffer:1; ///< false, if ::RecordLengthId is ::RECORDLENGTHID_LARGE
+		unsigned char reserved:5; ///< Unused bits
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
+	/// \struct FBuffer2Bits                                        hantek/types.h
+	/// \brief Buffer mode bits for 0x0f command (Byte 2).
+	struct FBuffer2Bits {
+		unsigned char reserved:7; ///< Unused bits
+		unsigned char slowBuffer:1; ///< false, if ::RecordLengthId is ::RECORDLENGTHID_SMALL
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \class BulkSetFilter                                        hantek/types.h
 	/// \brief The BULK_SETFILTER builder.
 	class BulkSetFilter : public Helper::DataArray<unsigned char> {
@@ -742,12 +833,12 @@ namespace Hantek {
 	class BulkSetTriggerAndSamplerate : public Helper::DataArray<unsigned char> {
 		public:
 			BulkSetTriggerAndSamplerate();
-			BulkSetTriggerAndSamplerate(unsigned short int samplerateSlow, unsigned long int triggerPosition, unsigned char triggerSource = 0, unsigned char bufferSize = 0, unsigned char samplerateFast = 0, unsigned char usedChannels = 0, bool fastRate = false, unsigned char triggerSlope = 0);
+			BulkSetTriggerAndSamplerate(unsigned short int samplerateSlow, unsigned long int triggerPosition, unsigned char triggerSource = 0, unsigned char recordLength = 0, unsigned char samplerateFast = 0, unsigned char usedChannels = 0, bool fastRate = false, unsigned char triggerSlope = 0);
 			unsigned char getTriggerSource();
 			void setTriggerSource(unsigned char value);
-			unsigned char getBufferSize();
-			void setBufferSize(unsigned char value);
+			unsigned char getRecordLength();
+			void setRecordLength(unsigned char value);
 			unsigned char getSamplerateFast();
 			void setSamplerateFast(unsigned char value);
 			unsigned char getUsedChannels();
@@ -855,8 +946,40 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetFilter2250                                    hantek/types.h
+	/// \brief The DSO-5200/DSO-5200A BULK_BSETFILTER builder.
+	class BulkSetFilter2250 : public Helper::DataArray<unsigned char> {
+		public:
+			BulkSetFilter2250();
+			BulkSetFilter2250(bool channel1, bool channel2);
+			
+			bool getChannel(unsigned int channel);
+			void setChannel(unsigned int channel, bool filtered);
+		
+		private:
+			void init();
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetTrigger2250                                   hantek/types.h
+	/// \brief The DSO-2250 BULK_CSETTRIGGERORSAMPLERATE builder.
+	class BulkSetTrigger2250 : public Helper::DataArray<unsigned char> {
+		public:
+			BulkSetTrigger2250();
+			BulkSetTrigger2250(unsigned char triggerSource, unsigned char triggerSlope);
+			
+			unsigned char getTriggerSource();
+			void setTriggerSource(unsigned char value);
+			unsigned char getTriggerSlope();
+			void setTriggerSlope(unsigned char slope);
+		
+		private:
+			void init();
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \class BulkSetSamplerate5200                                hantek/types.h
-	/// \brief The BULK_SETSAMPLERATE5200 builder.
+	/// \brief The DSO-5200/DSO-5200A BULK_CSETTRIGGERORSAMPLERATE builder.
 	class BulkSetSamplerate5200 : public Helper::DataArray<unsigned char> {
 		public:
 			BulkSetSamplerate5200();
@@ -872,12 +995,27 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetRecordLength2250                              hantek/types.h
+	/// \brief The DSO-2250 BULK_DSETBUFFER builder.
+	class BulkSetRecordLength2250 : public Helper::DataArray<unsigned char> {
+		public:
+			BulkSetRecordLength2250();
+			BulkSetRecordLength2250(unsigned char recordLength);
+			
+			unsigned char getRecordLength();
+			void setRecordLength(unsigned char value);
+		
+		private:
+			void init();
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \class BulkSetBuffer5200                                    hantek/types.h
-	/// \brief The BULK_SETBUFFER5200 builder.
+	/// \brief The DSO-5200/DSO-5200A BULK_DSETBUFFER builder.
 	class BulkSetBuffer5200 : public Helper::DataArray<unsigned char> {
 		public:
 			BulkSetBuffer5200();
-			BulkSetBuffer5200(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre = 0, unsigned char usedPost = 0, unsigned char bufferSize = 0);
+			BulkSetBuffer5200(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre = 0, unsigned char usedPost = 0, unsigned char recordLength = 0);
 			unsigned short int getTriggerPositionPre();
 			void setTriggerPositionPre(unsigned short int value);
@@ -887,8 +1025,27 @@ namespace Hantek {
 			void setUsedPre(unsigned char value);
 			unsigned char getUsedPost();
 			void setUsedPost(unsigned char value);
-			unsigned char getBufferSize();
-			void setBufferSize(unsigned char value);
+			unsigned char getRecordLength();
+			void setRecordLength(unsigned char value);
+		
+		private:
+			void init();
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetSamplerate2250                                hantek/types.h
+	/// \brief The DSO-2250 BULK_ESETTRIGGERORSAMPLERATE builder.
+	class BulkSetSamplerate2250 : public Helper::DataArray<unsigned char> {
+		public:
+			BulkSetSamplerate2250();
+			BulkSetSamplerate2250(bool fastRate, unsigned char samplerateFast = 0, unsigned short int samplerateSlow = 0);
+			
+			bool getFastRate();
+			void setFastRate(bool fastRate);
+			unsigned char getSamplerateFast();
+			void setSamplerateFast(unsigned char value);
+			unsigned short int getSamplerateSlow();
+			void setSamplerateSlow(unsigned short int samplerate);
 		private:
 			void init();
@@ -896,7 +1053,7 @@ namespace Hantek {
 	//////////////////////////////////////////////////////////////////////////////
 	/// \class BulkSetTrigger5200                                   hantek/types.h
-	/// \brief The BULK_SETTRIGGER5200 builder.
+	/// \brief The DSO-5200/DSO-5200A BULK_ESETTRIGGERORSAMPLERATE builder.
 	class BulkSetTrigger5200 : public Helper::DataArray<unsigned char> {
 		public:
 			BulkSetTrigger5200();
@@ -918,6 +1075,31 @@ namespace Hantek {
 	};
 	//////////////////////////////////////////////////////////////////////////////
+	/// \class BulkSetBuffer2250                                    hantek/types.h
+	/// \brief The DSO-2250 BULK_FSETBUFFER builder.
+	class BulkSetBuffer2250 : public Helper::DataArray<unsigned char> {
+		public:
+			BulkSetBuffer2250();
+			BulkSetBuffer2250(unsigned short int triggerPositionPre, unsigned short int triggerPositionPost, unsigned char usedPre = 0, unsigned char usedPost = 0, bool largeBuffer = false, bool slowBuffer = false);
+			
+			unsigned short int getTriggerPositionPre();
+			void setTriggerPositionPre(unsigned short int value);
+			unsigned short int getTriggerPositionPost();
+			void setTriggerPositionPost(unsigned short int value);
+			unsigned char getUsedPre();
+			void setUsedPre(unsigned char value);
+			unsigned char getUsedPost();
+			void setUsedPost(unsigned char value);
+			bool getLargeBuffer();
+			void setLargeBuffer(bool largeBuffer);
+			bool getSlowBuffer();
+			void setSlowBuffer(bool slowBuffer);
+		
+		private:
+			void init();
+	};
+	
+	//////////////////////////////////////////////////////////////////////////////
 	/// \class ControlGetSpeed                                      hantek/types.h
 	/// \brief The CONTROL_GETSPEED parser.
 	class ControlGetSpeed : public Helper::DataArray<unsigned char> {
@@ -140,10 +140,10 @@ OpenHantekMainWindow::OpenHantekMainWindow(QWidget *parent, Qt::WindowFlags flag
 		this->dsoControl->setTriggerLevel(channel, this->settings->scope.voltage[channel].trigger);
 	}
 	this->updateUsed(this->settings->scope.physicalChannels);
-	this->dsoControl->setBufferSize(this->settings->scope.horizontal.samples);
+	this->dsoControl->setRecordLength(this->settings->scope.horizontal.samples);
 	this->updateTimebase();
 	this->dsoControl->setTriggerMode(this->settings->scope.trigger.mode);
-	this->dsoControl->setTriggerPosition(this->settings->scope.trigger.position * this->settings->scope.horizontal.timebase * DIVS_TIME);
+	this->dsoControl->setPretriggerPosition(this->settings->scope.trigger.position * this->settings->scope.horizontal.timebase * DIVS_TIME);
 	this->dsoControl->setTriggerSlope(this->settings->scope.trigger.slope);
 	this->dsoControl->setTriggerSource(this->settings->scope.trigger.special, this->settings->scope.trigger.source);
@@ -203,20 +203,20 @@ void OpenHantekMainWindow::createActions() {
 	this->startStopAction->setShortcut(tr("Space"));
 	this->stopped();
-	this->bufferSizeActionGroup = new QActionGroup(this);
-	connect(this->bufferSizeActionGroup, SIGNAL(selected(QAction *)), this, SLOT(bufferSizeSelected(QAction *)));
+	this->recordLengthActionGroup = new QActionGroup(this);
+	connect(this->recordLengthActionGroup, SIGNAL(selected(QAction *)), this, SLOT(recordLengthSelected(QAction *)));
-	this->bufferSizeSmallAction = new QAction(tr("&Small"), this);
-	this->bufferSizeSmallAction->setActionGroup(this->bufferSizeActionGroup);
-	this->bufferSizeSmallAction->setCheckable(true);
-	this->bufferSizeSmallAction->setChecked(this->settings->scope.horizontal.samples == Hantek::BUFFER_SMALL);
-	this->bufferSizeSmallAction->setStatusTip(tr("10240 Samples"));
+	this->recordLengthSmallAction = new QAction(tr("&Small"), this);
+	this->recordLengthSmallAction->setActionGroup(this->recordLengthActionGroup);
+	this->recordLengthSmallAction->setCheckable(true);
+	this->recordLengthSmallAction->setChecked(this->settings->scope.horizontal.samples == 10240);
+	this->recordLengthSmallAction->setStatusTip(tr("10240 Samples"));
-	this->bufferSizeLargeAction = new QAction(tr("&Large"), this);
-	this->bufferSizeLargeAction->setActionGroup(this->bufferSizeActionGroup);
-	this->bufferSizeLargeAction->setCheckable(true);
-	this->bufferSizeLargeAction->setChecked(this->settings->scope.horizontal.samples == Hantek::BUFFER_LARGE);
-	this->bufferSizeLargeAction->setStatusTip(tr("32768 Samples"));
+	this->recordLengthLargeAction = new QAction(tr("&Large"), this);
+	this->recordLengthLargeAction->setActionGroup(this->recordLengthActionGroup);
+	this->recordLengthLargeAction->setCheckable(true);
+	this->recordLengthLargeAction->setChecked(this->settings->scope.horizontal.samples != 10240);
+	this->recordLengthLargeAction->setStatusTip(tr("32768 Samples"));
 	this->digitalPhosphorAction = new QAction(QIcon(":actions/digitalphosphor.png"), tr("Digital &phosphor"), this);
 	this->digitalPhosphorAction->setCheckable(true);
@@ -279,9 +279,9 @@ void OpenHantekMainWindow::createMenus() {
 	this->oscilloscopeMenu->addAction(this->commandAction);
 #endif
 	this->oscilloscopeMenu->addSeparator();
-	this->bufferSizeMenu = this->oscilloscopeMenu->addMenu(tr("&Buffer size"));
-	this->bufferSizeMenu->addAction(this->bufferSizeSmallAction);
-	this->bufferSizeMenu->addAction(this->bufferSizeLargeAction);
+	this->recordLengthMenu = this->oscilloscopeMenu->addMenu(tr("&Record length"));
+	this->recordLengthMenu->addAction(this->recordLengthSmallAction);
+	this->recordLengthMenu->addAction(this->recordLengthLargeAction);
 	this->menuBar()->addSeparator();
@@ -598,11 +598,11 @@ void OpenHantekMainWindow::updateSettings() {
 	}
 }
-/// \brief Apply new buffer size to settings.
-/// \param action The selected buffer size menu item.
-void OpenHantekMainWindow::bufferSizeSelected(QAction *action) {
-	this->settings->scope.horizontal.samples = (action == this->bufferSizeSmallAction) ? Hantek::BUFFER_SMALL : Hantek::BUFFER_LARGE;
-	this->dsoControl->setBufferSize(this->settings->scope.horizontal.samples);
+/// \brief Apply new record length to settings.
+/// \param action The selected record length menu item.
+void OpenHantekMainWindow::recordLengthSelected(QAction *action) {
+	this->settings->scope.horizontal.samples = (action == this->recordLengthSmallAction) ? 10240 : 32768;
+	this->dsoControl->setRecordLength(this->settings->scope.horizontal.samples);
 }
 /// \brief Sets the offset of the oscilloscope for the given channel.
@@ -620,7 +620,7 @@ void OpenHantekMainWindow::updateTimebase() {
 	this->dsoWidget->updateSamplerate();
 	// The trigger position should be kept at the same place but the timebase has changed
-	this->dsoControl->setTriggerPosition(this->settings->scope.trigger.position * this->settings->scope.horizontal.timebase * DIVS_TIME);
+	this->dsoControl->setPretriggerPosition(this->settings->scope.trigger.position * this->settings->scope.horizontal.timebase * DIVS_TIME);
 }
 /// \brief Sets the state of the given oscilloscope channel.
@@ -81,8 +81,8 @@ class OpenHantekMainWindow : public QMainWindow {
 		QAction *configAction;
 		QAction *startStopAction;
-		QActionGroup *bufferSizeActionGroup;
-		QAction *bufferSizeSmallAction, *bufferSizeLargeAction;
+		QActionGroup *recordLengthActionGroup;
+		QAction *recordLengthSmallAction, *recordLengthLargeAction;
 		QAction *digitalPhosphorAction, *zoomAction;
 		QAction *aboutAction, *aboutQtAction;
@@ -94,7 +94,7 @@ class OpenHantekMainWindow : public QMainWindow {
 		// Menus
 		QMenu *fileMenu;
 		QMenu *viewMenu, *dockMenu, *toolbarMenu;
-		QMenu *oscilloscopeMenu, *bufferSizeMenu;
+		QMenu *oscilloscopeMenu, *recordLengthMenu;
 		QMenu *helpMenu;
 		// Toolbars
@@ -143,7 +143,7 @@ class OpenHantekMainWindow : public QMainWindow {
 		void applySettings();
 		void updateSettings();
-		void bufferSizeSelected(QAction *action);
+		void recordLengthSelected(QAction *action);
 		void updateOffset(unsigned int channel);
 		void updateTimebase();
 		void updateUsed(unsigned int channel);