ECLDspUtilities Class Reference

This class contains static methods to make them accessible from pyROOT. More...

#include <ECLDspUtilities.h>

Static Public Member Functions
static ECLDspData *	readEclDsp (const char *raw_file, int boardNumber)
	Convert ECLDspData from *.dat file to Root object. More...
static void	writeEclDsp (const char *raw_file, ECLDspData *obj)
	Convert ECLDspData from Root object to *.dat file. More...
static ECLShapeFit	shapeFitter (int cid, std::vector< int > adc, int ttrig, bool adjusted_timing=true)
	Emulate shape fitting algorithm from ShaperDSP using algorithm from ecl/utility/src/ECLDspEmulator.cc See ecl/examples/eclShapeFitter.py for usage example. More...
static void	initPedestalFit ()
	Load DSP coefficients used in the pedestal fit function. More...
static ECLPedestalFit	pedestalFit (std::vector< int > adc)
	Fit pedestal part of the signal waveform (first 16 samples) This method will fit the first 16 samples of the waveform and return the amplitude of the peak found in that region. More...

Private Member Functions
	ECLDspUtilities ()
	Private constructor since class only contains static methods, no need to create an instance.

Static Private Attributes
static int	pedestal_fit_initialized = 0
	Flag indicating whether arrays fg31,fg32 are filled.
static float	pedfit_fg31 [768] = {}
	DSP coefficients used to determine amplitude in pedestalFit.
static float	pedfit_fg32 [768] = {}
	DSP coefficients used to determine time in pedestalFit.

Detailed Description

This class contains static methods to make them accessible from pyROOT.

Definition at line 41 of file ECLDspUtilities.h.

Member Function Documentation

initPedestalFit()

void initPedestalFit ( )

static

Load DSP coefficients used in the pedestal fit function.

If it is not done explicitly, pedestalFit will do it internally when it is called the first time.

However, it is preferable to call it explicitly, in a thread-safe context.

Definition at line 323 of file ECLDspUtilities.cc.

{
  std::string path = FileSystem::findFile("ecl/data/ecl_pedestal_peak_fit.root");
  TFile* file = new TFile(path.c_str(), "read");
  if (!file->IsOpen()) {
    B2FATAL("Unable to load coefficients for ECL pedestal fit");
  }
  TTree* tree = (TTree*)file->Get("dsp_coefs");
  int nentries = tree->GetEntries();
  float fg31_i, fg32_i;
  tree->SetBranchAddress("fg31", &fg31_i);
  tree->SetBranchAddress("fg32", &fg32_i);
  //== Load DSP coefficients used in pedestal fitting
  for (int i = 0; i < nentries; i++) {
    tree->GetEntry(i);
    pedfit_fg31[i] = fg31_i;
    pedfit_fg32[i] = fg32_i;
  }
  file->Close();
 
  pedestal_fit_initialized = 1;
}

pedestalFit()

ECLPedestalFit pedestalFit ( std::vector< int >  adc )

static

Fit pedestal part of the signal waveform (first 16 samples) This method will fit the first 16 samples of the waveform and return the amplitude of the peak found in that region.

Parameters

[in]

adc

vector of waveform samples (size >= 16)

Returns

struct with fit results

Definition at line 346 of file ECLDspUtilities.cc.

readEclDsp()

ECLDspData * readEclDsp ( const char *  raw_file, int  boardNumber  )

static

Convert ECLDspData from *.dat file to Root object.

Parameters

[in]	raw_file	Path to dsp??.dat file.
[in]	boardNumber	Number of shaperDSP board, from 1 to 52*12

Returns

ECLDspData object

Definition at line 49 of file ECLDspUtilities.cc.

shapeFitter()

ECLShapeFit shapeFitter ( int  cid, std::vector< int >  adc, int  ttrig, bool  adjusted_timing = true  )

static

Emulate shape fitting algorithm from ShaperDSP using algorithm from ecl/utility/src/ECLDspEmulator.cc See ecl/examples/eclShapeFitter.py for usage example.

Parameters

[in]	cid	CellID, 1..8736
[in]	adc	Waveform data from ECLDsp dataobject of length 31
[in]	ttrig	Trigger time from ECLTrig dataobject
[in]	adjusted_timing	Optional. Use adjusted formula to determine fit time. Implemented in ShaperDSP firmware since exp 14. If true, algorithm will determine time near 0 with higher precision, time of low-energy hits will be one of {-4,0,4} If false, time will be one of {-32, -16, 0}

Definition at line 256 of file ECLDspUtilities.cc.

writeEclDsp()

void writeEclDsp ( const char *  raw_file, ECLDspData *  obj  )

static

Convert ECLDspData from Root object to *.dat file.

Parameters

[in]	raw_file	Path to dsp??.dat file to be created.
[in]	obj	Object to be written

Definition at line 134 of file ECLDspUtilities.cc.

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The documentation for this class was generated from the following files:

• ecl/utility/include/ECLDspUtilities.h
• ecl/utility/src/ECLDspUtilities.cc