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Chapter 2. Setting up the software

cd ~/experiment/spectcl

cp /usr/opt/spectcl/current/Skel/* .

2.2.2. How to modify the skeleton to unpack events.

SpecTcl relies on a logical pipeline of event processors to unpack data from the raw event into

parameters. Each event processor has access to the raw event, and an output array-like object. This

provides each event processor with access to the raw event and any data unpacked by event processors

that are ahead of it in the pipeline.

Daniel Bazin has written an extension to SpecTcl called TreeParam. This extension superimposes

structure on top of the array-like output object which makes access to the event array much more natural.

Beginning with SpecTcl version 3.0, the TreeParam extension has become a supported part of SpecTcl.

Dr. Bazin’s TreeParam software also includes a very nice front end Graphical User Interface (GUI) for

SpecTcl that makes the creation and manipulation of spectra, gates and other SpecTcl object much more

user-friendly than raw SpecTcl. This GUI was also incorporated into the base SpecTcl program

beginning with version 3.0, it has been extensively modiﬁed for version 3.1.

In order to unpack data from our event segment, we need to write an event processor that:

• Declares the appropriate tree parameter members.

• Locates a packet with our packet id (0xff00).

• Unpacks the data in that packet into the appropriate treeparameter members.

Our event processor MyEventProcessor is deﬁned in the ﬁle MyEventProcessor.h, and

implemented in MyEventProcessor.cpp. The header looks like this:

Example 2-3. MyEventProcessor.h - header for the event processor.

#ifndef __MYEVENTPROCESSOR_H

#define __MYEVENTPROCESSOR_H

#include <EventProcessor.h> // ➊

#include <TranslatorPointer.h> // ➋

#include <histotypes.h> // ➌

// Forward class definitions:

class CTreeParameterArray;

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ADC 400F Manual Página 22