A level 1 calorimeter trigger conversion service: returns the Coordinate represented by a RoI word. More...

#include <RoIDecoder.h>

Inheritance diagram for LVL1::RoIDecoder:

Collaboration diagram for LVL1::RoIDecoder:

Public Member Functions
	RoIDecoder ()

virtual	~RoIDecoder ()

virtual CoordinateRange	coordinate (const unsigned int word) const =0

Protected Member Functions
unsigned int	extractBits (unsigned int word, const unsigned int start, const unsigned int length) const
	returns the value of bits in word between bit "start" and bit "start" + "length" More...

Protected Attributes
bool	m_DEBUG

Detailed Description

A level 1 calorimeter trigger conversion service: returns the Coordinate represented by a RoI word.

Author: E.Moyse

Todo:: this should probably be a static class.

Definition at line 46 of file RoIDecoder.h.

Constructor & Destructor Documentation

◆ RoIDecoder()

LVL1::RoIDecoder::RoIDecoder ( )

Definition at line 24 of file RoIDecoder.cxx.

                           :
   m_DEBUG( false ) {
  
 }

◆ ~RoIDecoder()

LVL1::RoIDecoder::~RoIDecoder ( )

virtual

Definition at line 29 of file RoIDecoder.cxx.

                             {
  
 }

Member Function Documentation

◆ coordinate()

virtual CoordinateRange LVL1::RoIDecoder::coordinate ( const unsigned int word ) const

pure virtual

Implemented in LVL1::CPRoIDecoder, and LVL1::JEPRoIDecoder.

◆ extractBits()

unsigned int LVL1::RoIDecoder::extractBits	(	unsigned int	word,
		const unsigned int	start,
		const unsigned int	length
	)		const

protected

returns the value of bits in word between bit "start" and bit "start" + "length"

Definition at line 34 of file RoIDecoder.cxx.

                                                                               {
  
    // this works as follows. Imagine start=3, bits=4 and word=11011100
    // so this routine should return 0111
    // now:
    // word>>(first-1)  = 110111
    // (1<<length)      = 010000
    // (1<<length)-1    = 001111
    word = ( word >> ( start - 1 ) );
  
    unsigned int bitmask = ( 1 << length ) - 1;
    // and finally:
    // 110111&001111    = 0111
    return ( word & bitmask ); // return only bits in bitmask
 }

Member Data Documentation

◆ m_DEBUG

bool LVL1::RoIDecoder::m_DEBUG

protected

Definition at line 63 of file RoIDecoder.h.

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

Public Member Functions

Protected Member Functions

Protected Attributes