ARINC-818 Testing For Avionics Applications Ken Bisson AIM-USA [phone] [e-mail]

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ARINC-818 Testing For Avionics Applications Ken
BissonAIM-USA(603) 378-0957kenb_at_aimusa-online.c
om
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Overview

• A Brief Introduction to ARINC-818
• Simple to Implement
• Fast and Scalable
• Based on Fibre Channel
• ARINC-818 Protocol
• Containers
• Objects
• Testing ARINC-818, Challenges and Strategies
• Traffic Generation
• Traffic Monitoring
• Digital Display
• Conclusion

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A Brief Introduction To ARINC-818
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What is ARINC-818?
American National Standards Institute (ANSI)
Airline, Airframe, Avionics standard for
avionics video. Based on Fibre Channel, FC-AV
IEEE
AEEC
InterNational Committee for Information
Technology Standards (INCITS)
T10 (SCSI)
T11 (FC)
FC-AV
ARINC-818
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What is ARINC-818?

• ARINC-818 is a communication protocol between
  image and sensor data generators and digital
  displays.
• ARINC-818 has been designed as a simple
  interface.
• ARINC-818 has been designed as a fast interface
  that is scalable.
• ARINC-818 is based on Fibre Channel

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ARINC-818 Basics Topology

• Point-to-Point
• Exactly two N_Ports connected together
• No Switch (routing function) present
• High QoS and BER connection
• Provisions to operate in a switch topology
• Switch topology
• Generic centralized switch (routing) environment
• Well-Known Services usually required

Switch
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ARINC-818 Basics Fast and Scalable

• Network operation currently at 1,2,4 and 8Gb/sec
• Fibre Channel Roadmap calls for 16 Gb/s in the
  next few years

Video Resolutions vs Link Speeds
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Why is 818 based on FC?

• FC Breaks the relationship between physical
  interface and protocol
• Split data from the means of transporting data
• Define no native command set
• Protocol independent management functions
• SVGA protocol and bus is an example of where the
  physical interface and the protocol were so
  related that the two were inseparable.

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Protocol Levels Simple Node
ARINC-818 Application The mapping of agreed upon digital video display protocols
FC Level OSI Layer Description
FC-4 Application The mapping of the application to the network control structures. For Fibre Channel the Video application is defined as FC-AV.
FC-3 Presentation Security, compression, encryption and other common services.
FC-2 Session Fibre Channel Session, Exchange, and Sequence Management.
FC-2 Transport Segmentation and reassembly error handling and Acknowledgements.
FC-2 Network Handles addressing, routing, and topology abstraction. In FC, the routing, etc. handled by FC-SW2 standard is transparent to FC-2.
FC-1/FC-2 Data Link Defines bits, bytes, words. Also does framing and link protocols like flow control.
FC-0 Physical Electro-mechanical I/F, Media.
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Data Organization Hierarchy
Exchange Uni or bi-directional set of non
concurrent sequences with an Originator and
Consumer
Information Unit
FC-AV
Fibre Channel
Sequence Unidirectional transfer of Frames
within an exchange
Frame Up to 2112 Bytes of Data and 24 bytes
header
Transmission
Word 40 bits
Transmission
Character 10 bits
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Fibre Channel Frame Transmission

• Start-of-Frame delimiter
• Frame Header (24 Transmission Characters)
• Data Field (128 minimum to 2112 maximum
  Transmission Characters
• Optional Headers (0-128)
• Payload (0-implemented maximum minus optional
  header length)
• CRC (4 Transmission Characters)
• End-of-Frame delimiter Ordered Set

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Where Can I Get more Fibre Channel Information?

• Completed Standards
• Techstreet1327 Jones Dr.Ann Arbor, MI 48105
  USAPhone [phone]Fax (734)
  302-7811E-mail service_at_techstreet.com
• T11 Web Site at www.t11.org
• May get drafts in PDF format, many of which are
  completed
• Your Internal Corporate Library

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An Overview of ARINC-818 Protocol
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ARINC-818 Protocol Map
Video Frame
Container
Container Header Anc. Data
Full or portion Of Video Line
Full or portion Of Video Line
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Display Maps to FC Frames
Objects are mapped onto Fibre Channel Frames
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Testing ARINC-818
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Testing Challenges

• The shear volume of the data
• The bandwidth of the data
• Fault tolerance and Determinism are derived from
  a combination of Fibre Channel, and ARINC-818
  application protocol

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Testing Example
1024 x 768, 30Hz Progressive Scan, 24 bit RGB
170.164 usec
FC_1536
FC_1
FC_2
Header
Header
474.428 usec
32664.245 usec

• Sending 1 Video Frame (30Hz) at 1.0625 Gbps
  requires
• Making all Fibre Channel frames contain ½ video
  line or 512 pixels
• A total of 1536 Fibre Channel frames are used
  to send the video frame
• A header frame is used to identify video frame
  info
• Fibre Channel IDLES are use between frames to
  control timing
• (i.e. frame rate, horizontal line rates)

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Testing Example
1024 x 768, 30Hz Progressive Scan, 24 bit RGB
Left half of image
Right half of image
Time
Object 0 Frame Time 1.317 usec
Object 2 Frame Time 14.795 usec
SOF (Object 0) to SOF (first Obj 2) 170.164 usec
SOF (object 2) first to last 32671.623 usec
Object 2 last Object 0 489.223 usec
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Protocol Analyzer

• Capture of any Fibre Channel data stream
  (including errors)
• Synchronization across multiple streams
• Hardware data filtering on storage
• Large configurable memory buffer for storage
• Multi-level triggering capability
• Data Views in FC-1, FC-2, and ARINC-818 or User
  Defined modes
• Nanosecond timestamps

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Data Generators

• Must be able to control timing and behavior of
  transmission words
• Used to specify transmission words and
  transmission behavior

Example 1024x768-30Hz-24-bit This file
contains 3 frames Container Header
Information SOFi1 0x44000000 0x00000000 0x00300000
0x00000000 0xFFFFFFFF
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Emulator

• Simulate either end of the ARINC-818 device
  connection
• Test the low-level initialization between devices

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Summary

• ARINC-818 is simple protocol based on Fibre
  Channel
• Fault tolerance and Determinism are derived from
  a combination of Fibre Channel and ARINC-818
  protocol
• 3 types of Testing
• Protocol Analyzer
• Data Generator
• Emulator