VT_Resulting_camera_behaviour.png
The figure shows the timing of events set-up with the sequencer.

This example describes how to set-up a sequencer to acquire 3 images from a single trigger signal. To achieve this a sequencer-counter is used to trigger the exposures.

If you want to know more detail about what to do with a sequencer please refer to the application notes below where the concepts and features are described in much more detail.

Using the sequencer might require some planning to visualize what should happen when. In our example it is quite straight forward:

  • the first Image is triggered through the hardware-trigger through input “Line 0”, that also triggers the start of the sequencer
  • the sequencer-set “Set0” is configuring and triggering the second image
  • the sequencer-set “Set1” is configuring and triggering the third image

 

    // STOP ACQUISITION AND LOAD DEFAULT PARAMETERS
pDevice->GetRemoteNode("AcquisitionStop")->Execute();
pDevice->GetRemoteNode("UserSetSelector")->SetString("Default");
pDevice->GetRemoteNode("UserSetLoad")->Execute();

// CONFIGURING THE TRIGGER INPUT
pDevice->GetRemoteNode("TriggerMode")->SetString("On");
pDevice->GetRemoteNode("TriggerSource")->SetString("Line0");
pDevice->GetRemoteNode("TriggerActivation")->SetString("RisingEdge");
pDevice->GetRemoteNode("TriggerDelay")->SetDouble(0.0);
pDevice->GetRemoteNode("LineSelector")->SetString("Line0");
pDevice->GetRemoteNode("LineInverter")->SetBool(false);
pDevice->GetRemoteNode("LineDebouncerHighTimeAbs")->SetDouble(1.0);
pDevice->GetRemoteNode("LineDebouncerLowTimeAbs")->SetDouble(1.0);

// CONFIGURE GPIO “Line3” as an OUTPUT
pDevice->GetRemoteNode("LineSelector")->SetString("Line3");
pDevice->GetRemoteNode("LineInverter")->SetBool(false);
pDevice->GetRemoteNode("UserOutputSelector")->SetString("UserOutput1");
pDevice->GetRemoteNode("UserOutputValue")->SetBool(false);
pDevice->GetRemoteNode("LineSource")->SetString("UserOutput1");


// SWITCH TO SEQUENCER CONFIG MODE
pDevice->GetRemoteNode("SequencerConfigurationMode")->SetString("On");

// SET 0 (FIRST STEP OF THE SEQUENCE)
pDevice->GetRemoteNode("SequencerSetSelector")->SetInt(0);
pDevice->GetRemoteNode("SequencerSetLoad")->Execute();
pDevice->GetRemoteNode("TriggerMode")->SetString("On");
pDevice->GetRemoteNode("CounterSelector")->SetString("Counter1");
pDevice->GetRemoteNode("CounterEventSource")->SetString("Off");

// Set ExposureTime for Set0
pDevice->GetRemoteNode("ExposureTime")->SetDouble(15000.0); 
pDevice->GetRemoteNode("SequencerPathSelector")->SetInt(0);
pDevice->GetRemoteNode("SequencerTriggerSource")->SetString("ExposureActive");
pDevice->GetRemoteNode("SequencerTriggerActivation")->SetString("RisingEdge");
pDevice->GetRemoteNode("SequencerSetNext")->SetInt(1);
pDevice->GetRemoteNode("SequencerSetSave")->Execute();

// SET 1 (SECOND STEP OF THE SEQUENCE)
pDevice->GetRemoteNode("SequencerSetSelector")->SetInt(1);
pDevice->GetRemoteNode("SequencerSetLoad")->Execute();
pDevice->GetRemoteNode("TriggerMode")->SetString("Off");
pDevice->GetRemoteNode("CounterSelector")->SetString("Counter1");
pDevice->GetRemoteNode("CounterEventSource")->SetString("ExposureActive");
pDevice->GetRemoteNode("CounterEventActivation")->SetString("RisingEdge");
pDevice->GetRemoteNode("CounterDuration")->SetInt(2);
pDevice->GetRemoteNode("CounterResetSource")->SetString("Counter1End");
pDevice->GetRemoteNode("CounterResetActivation")->SetString("RisingEdge");

// Set ExposureTime for Set1
pDevice->GetRemoteNode("ExposureTime")->SetDouble(10000.0);
pDevice->GetRemoteNode("SequencerPathSelector")->SetInt(0);
pDevice->GetRemoteNode("SequencerTriggerSource")->SetString("Counter1End");
pDevice->GetRemoteNode("SequencerTriggerActivation")->SetString("RisingEdge");
pDevice->GetRemoteNode("SequencerSetNext")->SetInt(0);
pDevice->GetRemoteNode("SequencerSetSave")->Execute();
pDevice->GetRemoteNode("SequencerSetStart")->SetInt(0);

// SEQUENCER CONFIG END
pDevice->GetRemoteNode("SequencerConfigurationMode")->SetString("Off");

// START CAMERA SEQUENCER
pDevice->GetRemoteNode("SequencerMode")->SetString("On");
pDataStream->StartAcquisitionContinuous();
pDevice->GetRemoteNode("AcquisitionStart")->Execute();

// WAIT FOR TRIGGER TO CAPTURE THREE IMAGES

// STOP CAMERA SEQUENCER
pDevice->GetRemoteNode("AcquisitionStop")->Execute();
pDataStream->StopAcquisition();
pDevice->GetRemoteNode("SequencerMode")->SetString("Off"); 
  
    // STOP ACQUISITION AND LOAD DEFAULT PARAMETERS
mDevice.RemoteNodeList["AcquisitionStop"].Execute();
mDevice.RemoteNodeList["UserSetSelector"].Value = "Default";
mDevice.RemoteNodeList["UserSetLoad"].Execute();

// CONFIGURING THE TRIGGER INPUT
mDevice.RemoteNodeList["TriggerMode"].Value = "On";
mDevice.RemoteNodeList["TriggerSource"].Value = "Line0";
mDevice.RemoteNodeList["TriggerActivation"].Value = "RisingEdge";
mDevice.RemoteNodeList["TriggerDelay"].Value = (double)0.0;
mDevice.RemoteNodeList["LineSelector"].Value = "Line0";
mDevice.RemoteNodeList["LineInverter"].Value = false;
mDevice.RemoteNodeList["LineDebouncerHighTimeAbs"].Value = (double)1.0;
mDevice.RemoteNodeList["LineDebouncerLowTimeAbs"].Value = (double)1.0;

// CONFIGURE GPIO “Line3” as an OUTPUT 
mDevice.RemoteNodeList["LineSelector"].Value = "Line3";
mDevice.RemoteNodeList["LineInverter"].Value = false;
mDevice.RemoteNodeList["UserOutputSelector"].Value = "UserOutput1";
mDevice.RemoteNodeList["UserOutputValue"].Value = false;
mDevice.RemoteNodeList["LineSource"].Value = "UserOutput1";


// SWITCH TO SEQUENCER CONFIG MODE
mDevice.RemoteNodeList["SequencerConfigurationMode"].Value = "On";

// SET 0 (FIRST STEP OF THE SEQUENCE)
mDevice.RemoteNodeList["SequencerSetSelector"].Value = (long)0;
mDevice.RemoteNodeList["SequencerSetLoad"].Execute();
mDevice.RemoteNodeList["TriggerMode"].Value = "On";
mDevice.RemoteNodeList["CounterSelector"].Value = "Counter1";
mDevice.RemoteNodeList["CounterEventSource"].Value = "Off";

// Set ExposureTime for Set0
mDevice.RemoteNodeList["ExposureTime"].Value = (double)15000.0; 
mDevice.RemoteNodeList["SequencerPathSelector"].Value = (long)0;
mDevice.RemoteNodeList["SequencerTriggerSource"].Value = "ExposureActive";
mDevice.RemoteNodeList["SequencerTriggerActivation"].Value = "RisingEdge";
mDevice.RemoteNodeList["SequencerSetNext"].Value = (long)1;
mDevice.RemoteNodeList["SequencerSetSave"].Execute();

// SET 1 (SECOND STEP OF THE SEQUENCE)
mDevice.RemoteNodeList["SequencerSetSelector"].Value = (long)1;
mDevice.RemoteNodeList["SequencerSetLoad"].Execute();
mDevice.RemoteNodeList["TriggerMode"].Value = "Off";
mDevice.RemoteNodeList["CounterSelector"].Value = "Counter1";
mDevice.RemoteNodeList["CounterEventSource"].Value = "ExposureActive";
mDevice.RemoteNodeList["CounterEventActivation"].Value = "RisingEdge";
mDevice.RemoteNodeList["CounterDuration"].Value = (long)2;
mDevice.RemoteNodeList["CounterResetSource"].Value = "Counter1End";
mDevice.RemoteNodeList["CounterResetActivation"].Value = "RisingEdge";

// Set ExposureTime for Set1
mDevice.RemoteNodeList["ExposureTime"].Value = (double)10000.0; // 10 msec
mDevice.RemoteNodeList["SequencerPathSelector"].Value = (long)0;
mDevice.RemoteNodeList["SequencerTriggerSource"].Value = "Counter1End";
mDevice.RemoteNodeList["SequencerTriggerActivation"].Value = "RisingEdge";
mDevice.RemoteNodeList["SequencerSetNext"].Value = (long)0;
mDevice.RemoteNodeList["SequencerSetSave"].Execute();
mDevice.RemoteNodeList["SequencerSetStart"].Value = (long)0;

// SEQUENCER CONFIG END
mDevice.RemoteNodeList["SequencerConfigurationMode"].Value = "Off";

// START CAMERA SEQUENCER
mDevice.RemoteNodeList["SequencerMode"].Value = "On";
mDataStream.StartAcquisition();
mDevice.RemoteNodeList["AcquisitionStart"].Execute();

// WAIT FOR TRIGGER TO CAPTURE THREE IMAGES

// STOP CAMERA SEQUENCER
mDevice.RemoteNodeList["AcquisitionStop"].Execute();
mDataStream.StopAcquisition();
mDevice.RemoteNodeList["SequencerMode"].Value = "Off";
 
  

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