Notes

Outline

NSCL Data Acquisition System Tutorial Data Taking in the Fast Lane. Why not join daqlist? http://mailman.nscl.msu.edu/mailman/listinfo

Disclaimer

System Block Diagram (Dataflow)

What is a “Front End”?

Readout Software

Tailoring Readout

skeleton.cpp – Event Readout

C/C++ programming The Fast Track Introduction to C and C++.

C – Program is a bunch of functions

Variables must be declared before use:

Primitive data types:

Main Non-Primitive data types:

User Defined type-names

Statements: Expression  (random order)

Flow of Control

Pointers  Variables That are Addresses

Libraries C has no I/O all I/O is done via library functions (see printf, fopen, fprintf etc. etc.). C has a rich set of libraries for string manipulation C has a rich set of mathematics libraries. C’s library includes malloc()/free() which allocate/release memory (return/take pointers).

Principles of Object Oriented Programming

Defining And Declaring A Class

Implementing Member Functions

Constructing objects.

Readout and CAEN V775/V785/V792/V862 modules These modules programmatically are identical. These modules are actually hardware-wise identical: QDC Personality board e.g. Peak -> charge converter Supported in the readout via a CAENcard class Use them by constructing and manipulating CAENcard objects.

Constructing and Initializing Modules

Reading the Modules:

But What Will My Event Look Like?

For Each CAEN Module

SpecTcl

Tailoring SpecTcl for an Experiment

C++ Advanced course fast track Inheritance and Polymorphism

Inheritance:

Polymorphism:

References:  Pointers in disguise.

The SpecTcl processing model.

Tailoring SpecTcl is: Choosing a set of parameters to hold your data. Writing  an (or a pipeline of) event processors to unpack the raw event into your parameters. Writing setup scripts that define the parameters and spectra gates and their applications.

What’s an Event Processor:

Unpacking an array of CAEN modules.

Unpacking a module:

Cunpacker::OnBegin

CCAENUnpacker::Setup

Cunpacker::operator()

Unpacking our top level packet:

Unpacking a module

Unpacking channels via the map:

Registering our unpacker