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SNL Editor and Debugger
EPICS collaboration meeting 2008 Shanghai
Institute of Applied Physics (SINAP), 13th March
2008 Jan Hatje, Albert Kagarmanov, Gongfa Liu
(DESY / MKS-2) Kai Meyer, Matthias Zeimer
(C1-WPS)
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Overview

• SNL Editor
• Features
• Design

• SNL Debugger
• IOC Remote Management
• User Interface
• Check and manipulate status of a state program

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Project

• SNL Editor
• University of Hamburg, Kai Meyer, Matthias
  Zeimer, C1-WPS (contract)
• Further development Matthias Zeimer (Master
  thesis)

• SNL Debugger
• Albert Kagarmanov (Desy)
• Gongfa Liu (Desy)

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State Notation Language (SNL)

• Programming of sequential operations
• SNL program is executed on the IOC
• Interaction with EPICS databases via channel
  access

Declaration part
State Set part
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The new SNL Editor

• SNL Project type with adequate folder structure

• SNL Editor is inherited from Eclipse standard
  editor
• SNL Editor is connected to .st files
• SNC compiles SNL- files with each saving
• Compiler options settable in preference page

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SNL Editor features

• SNL Keywords are colored
• Outline view shows program structure
• Items in Outline view are linked with editor
  items
• Checks the basic structure of the program
• Problem view with a list of code errors

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SNL Editor Techniques

• Based on the eclipse core text editor, inspired
  by the C Development Toolkit
• SNL Editor is integrated in the eclipse platform
• The editor uses the SNL compiler delivered with
  the EPICS Environment
• Outline parsing is done by a custom parser with
  extended code verification
• Available for CSS from Desy update site
  (eclipse.desy.de/update/beta)

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SNL Editors current state of development

• Completed
• Basic project handling
• Editor highlighting completed for SNL 2.1
• Outline parsing complete
• SNL compilation process support
• In progress
• full build support for LinuX and VxWorks

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SNL Editor Outlook

• Integration of Drag and Drop and Object
  contribution for CSS datatypes
• Extended check of code structure
• Automatic code completion (syntactically)
• Providing code custom templates
• Automatic code completion (semantically)
• Integration of any target build process
• Minor changes of the SNL language to enhance
  interoperability (ex. SNL for Java IOCs)

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SNL Debugger IOC Remote Management

• SNL Debugger is part of the Remote IOC Management
• Redundancy Monitor Task (RMT) distributes XML
  commands
• RMT reads and writes to SNL Exec
• SNL Debugger is integrated in CSS
• Using common CSS IOC-Communication
• Support Drag and Drop and object contribution of
  CSS datatypes

IOC, VxWorks
CCE
CAN Driver
CSS
Command (XML)
SNL Debugger
Redundancy Monitor Task (RMT)
SNL Exec
Response (XML)
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SNL Debugger

• Examine and check running state programs
• Read / Write values of variables
• Jump to states of a state set
• Control run mode of state sets
• Host list is configurable by preferences
• SNL Documentation Menu Help ? Help Contents
  ? CSS Applications

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SNL Debugger User Interface
IP Address of IOC
IOC Remote Management
General information
Node information
SNL Debugger
List of running state programs
List of commands to display SNL Exec status
List of commands to manage SNL Exec
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SNL Debugger Variables

• Overview of all variables in a SNL program
• Shows type, value and assignment of selected
  variable
• Object contribution for process variables
• Value of a variable can be set on the IOC

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SNL Debugger State set

• Shows information for every state set
• The current state can be changed by the user to
  any state in the program
• Run modes suspend, resume and single Step
  are available

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SNL Debugger SNL Exec

• SNL Report shows
• Statistic of communication between IOC master and
  slave
• Status of all running state programs
• Synchronization status
• Settings of tuning time

• SNL Actions
• Starts or stops the synchronization
• Starts or stops a state programs
• Rebuild the entry table of the state program

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SNL Debugger

• Using SNL Debugger on Linux (Add RMT to SNL Exec)
• List with IP addresses of redundant pairs in
  preferences
• Necessary modifications in SNL will be applied by
  Desy to the standard distribution

• SNL Debugger is available for CSS (csstudio.org
  ? Download ? CSS Platform)
• Get SNL Debugger from the predefined update site
• For questions please contact jan.hatje_at_desy.de,
  albert.kagarmanov_at_desy.de, gongfa.liu_at_desy.de
• - Thank you -