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  • Most of the functions return 0 if it was a successful function call, any other number means it failed.
  • Wiki Markup
    Values are obtained through the arguments of the function calls. E.g. declare an array in your myana.cc, and {{getXXXValue(&myarray\[0\])}} will fill the array for you.
  • Enums: Several of the functions can be used to extract data from several of the detectors. Which detector is specified by an enum (named constant integers). You are encouraged to use the names instead of the numbers, in case the underlying order changes in a new version of the program.
Panel
Acquiris digitizer
:
Code Block

int getAcqConfig(AcqDetector det, int& numChannels, int& numSamples, double& sampleInterval);

Fetches the configuration information for any of the Acquiris devices. Returns 1 if the requested detector does not exist, and 2 if it was not in use. Tells you the number of channels used for this device, the number of samples collected and the sample interval. This is typically done in the beginjob() or beginrun() functions.

Code Block
int getAcqValue(AcqDetector det, int channel, double*& time, double*& voltage);
int getAcqValue(AcqDetector det, int channel, double*& time, double*& voltage, double& trigtime);

Fetches waveform data from any of the Acquiris devices. Fills your arrays with the waveform time and voltage, and optionally gives you the trigger time.

In the myana.cc example, we fetch data from the AmoITof device (AMO Ion Time-of-flight).
Other Acquiris devices (see main.hh for an up-to-date list):

Code Block
AMO:
   AmoIms      - ion momentum spectrometer
   AmoGasdet   - gas detector (in the Front End Enclusure)
   AmoETof     - electron time-of-flight
   AmoMbes     - magnetic bottle electron spectrometer
   AmoVmiAcq   - (Vmi = Velocity mapping imaging)
   AmoBpsAcq   - (Bps = Beam position screen)
   Camp        - for the CAMP experimental setup
SXR:
   SxrBeamlineAcq1
   SxrBeamlineAcq2
   SxrEndstationAcq1
   SxrEndstationAcq2
Panel
Image data

There are several getters for various image data:

  • getFrameValue Gives you the width and height (in pixels) of the image, and a pointer to the start of the pixel array of a Pds::Camera::FrameV1 object.
  • getOpal1kValue an alias for getFrameValue
  • getTm6740Value an alias for getFrameValue
  • getCspadQuad Gives you a pointer to the first position in the array of pixel data from the XPP CsPad detector (or alternatively you can get a pointer to the Pds::CsPad::ElementV1 object itself).
Code Block
int getFrameConfig   (FrameDetector det);
int getFrameValue(FrameDetector det, int& frameWidth, int& frameHeight, unsigned short*& image );

fetches an image from the FrameDetector of your choice.
Specify the detector (using an appropriate enum), and getFrameValue will direct your pointers to the width and height of the image as well as the start of the pixel array.

Code Block
Other frame detectors:
  AMO:
      AmoVmi
      AmoBps1
      AmoBps2
  SXR:
      SxrBeamlineOpal1
      SxrBeamlineOpal2
      SxrEndstationOpal1
      SxrEndstationOpal2
      SxrFccd
   XPP:
      XppSb1PimCvd
      XppMonPimCvd
      XppSb3PimCvd
      XppSb4PimCvd

For an example of how to draw an image as a 2D root histogram, see the myana_cspad.cc example.

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