www.lightsource.ca main bullet #1 main bullet #2 main bullet #3 epics and cls september 18, 2009

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Main Bullet #1 Main Bullet #2 Main Bullet #3

EPICS and CLS

September 18, 2009

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Controls Environment

Common Target Processors Intel x86 (RH 7.2 for VME apps, SL 4.x for OPI) Mxscaleb (Moxa 7408, 8 serial processors, Linux) Motorola 68360 25MHz (EROC)

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Controls Environment

Operating Systems Linux Red Hat 7.2 Scientific Linux 4.X Moxa Embedded Linux RTEMS (Motorola 68xxx and Intel x86) Windows XP with Cygwin

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Common Tools

EPICS edm matlab gtk+ based library (no longer supported) Qt+EPICS widget library

Less Common: Root Python spec

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Development

See 7.1.39.1 rev ???Using css2400-103 for development makeBaseApp.pl –t ioc myproject makeBaseApp.pl –i –t ioc iocnameDevelopment Details

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Deployment

/iocApps/SYSTEM/IOCNAME/APPNAME /iocApps/SYSTEM/APPNAME (symbolic link) /etc/init.d startup scriptSYSTEM – e.g. 06B1_1_SXRMB_BLIOCNAME – e.g. IOC1606-022APPNAME – e.g. Motors

In general the bin, db, dbd, and iocBoot directories are installed with required files

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Deployment - libraries

use $EPICS_LOCAL/drivers when installingLibrary_name

Library_version

lib

Linux-x86

libNAME.a

libNAME.so.X.Y

libNAME.so.X.Y.Z

libNAME.so

include

NAME.h

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Deployment - libraries

templates

NAME.tpl

NAME.db

NAME_morestuff.db

dbd

NAME.dbd

Screens

OPI

NAME.tpl

NAME.tpl

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Deployment - OPI

/home/control – for Linac/BR1/SR1 operation (beware of DEVELOPMENT vs. PRODUCTION)

/home/beamline – for common beamline applications and libraries

/home/hxma (e.g.) – for applications specific to the given beamline

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Documentation!

Documentation Procedure – \\canopus\common\Library_and_Reference\Document_Control

Also available from http://teamsite under “Documents -> Approved Documents”

Wiki (http://wiki.clsi.ca)

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What is EPICS?

EPICS Overview

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What is Channel Access?

Channel Access is the Software Bus for EPICS Application communication

Channel Access

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Records and Fields

Records are common definitions of a collection of fields. New record types are rarely developed at the CLS

In the simplest case, a Field is the minimum Channel Access data communicated

Device drivers are designed to process a record when a field updates (output) or when hardware values have been read (input)

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Record Processing

Records, Devices, and Drivers Databases, Part 1

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Record Types

Databases, Part 2