Auxiliary class to perform check-sum on raw data. More...

#include <JChecksum.hh>

Classes
struct	error
	Error. More...

struct	result_type
	Auxiliary data structure for result of checksum. More...

Public Types
enum	error_types { EPMT_t = 1, ETDC_t, TIME_t, EUDP_t, SIZE_t }
	Error types. More...

typedef result_type::const_iterator	const_iterator

typedef result_type::const_reverse_iterator	const_reverse_iterator

Public Member Functions
	JChecksum ()
	Default constructor. More...

const result_type &	operator() (const JDAQSuperFrame &frame) const
	Check sum. More...

Private Attributes
std::vector< JDAQHit::JTDC_t >	t0

result_type	buffer

Detailed Description

Auxiliary class to perform check-sum on raw data.

Definition at line 41 of file JChecksum.hh.

Member Typedef Documentation

typedef result_type::const_iterator JTRIGGER::JChecksum::const_iterator

Definition at line 119 of file JChecksum.hh.

typedef result_type::const_reverse_iterator JTRIGGER::JChecksum::const_reverse_iterator

Definition at line 120 of file JChecksum.hh.

Member Enumeration Documentation

enum JTRIGGER::JChecksum::error_types

Error types.

Enumerator
EPMT_t	PMT number error.
ETDC_t	TDC value error.
TIME_t	Time order error.
EUDP_t	UDP packet error.
SIZE_t	size error

Definition at line 45 of file JChecksum.hh.

                      {
       EPMT_t = 1,      //!< PMT number error
       ETDC_t,          //!< TDC value  error
       TIME_t,          //!< Time order error
       EUDP_t,          //!< UDP packet error
       SIZE_t           //!< size       error
     };

Constructor & Destructor Documentation

JTRIGGER::JChecksum::JChecksum ( )

inline

Default constructor.

Definition at line 126 of file JChecksum.hh.

     {
       t0.resize(NUMBER_OF_PMTS, 0);
     }

Member Function Documentation

const result_type& JTRIGGER::JChecksum::operator() ( const JDAQSuperFrame & frame ) const

inline

Check sum.

The following checks are made:

UDP packet assembly is complete;
PMT number greater or equals zero and less than NUMBER_OF_PMTS;
TDC value less than frame time (with 5% margin);
TDC values from same PMT are monotonously increasing;

Parameters

frame DAQ frame

Returns: list of errors; empty if all okay

Definition at line 144 of file JChecksum.hh.

     {
       using namespace std;
       using namespace KM3NETDAQ;
 
       const JDAQHit::JTDC_t Tmax = (JDAQHit::JTDC_t) (getTimeSinceRTS(frame.getFrameIndex()) + 1.05 * getFrameTime());
 
       buffer.clear();
 
       for (vector<JDAQHit::JTDC_t>::iterator i = t0.begin(); i != t0.end(); ++i) {
         *i = 0;
       }
 
       if (frame.size() > MAXIMAL_FRAME_SIZE) {
         buffer.push_back(error(-1, SIZE_t));
       }
 
       if (!frame.testDAQStatus()) {
         buffer.push_back(error(-1, EUDP_t));
       }
 
       for (JDAQSuperFrame::const_iterator hit = frame.begin(); hit != frame.end(); ++hit) {
 
         const JDAQHit::JTDC_t pmt = hit->getPMT();
         const JDAQHit::JTDC_t tdc = hit->getT();
 
         if (pmt < NUMBER_OF_PMTS) {
 
           if (tdc < t0[pmt]) {
             buffer.push_back(error(distance(frame.begin(), hit), TIME_t));
           }
 
           if (tdc > Tmax) {
             buffer.push_back(error(distance(frame.begin(), hit), ETDC_t));
           }
 
           t0[pmt] = tdc;
 
         } else {
 
           buffer.push_back(error(distance(frame.begin(), hit), EPMT_t));          
         }
       }
 
       return buffer;
     }