Reliable Diagnostics of a MOST System MOST Forum, Stuttgart/ - - PowerPoint PPT Presentation

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Reliable Diagnostics of a MOST System MOST Forum, Stuttgart/ - - PowerPoint PPT Presentation

Dec 24, 2022 221 likes •443 views

Reliable Diagnostics of a MOST System MOST Forum, Stuttgart/ Esslingen, April 23, 2013 Dr.-Ing. Terezia Toth Senior Consultant Engineer www.ruetz-system-solutions.com experts in automotive data communication Agenda 1. Motivation 2. ECL in a

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www.ruetz-system-solutions.com experts in automotive data communication

MOST Forum, Stuttgart/ Esslingen, April 23, 2013

Reliable Diagnostics of a MOST System

Dr.-Ing. Terezia Toth

Senior Consultant Engineer

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www.ruetz-system-solutions.com experts in automotive data communication

  • 1. Motivation
  • 2. ECL in a MOST Network
  • 3. Test Specification Development Process
  • 4. Test Solution
  • 5. Conclusion

Agenda

2

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www.ruetz-system-solutions.com experts in automotive data communication

Compliance Process - New Scope of the MOST Cooperation New specification:

  • MOST Electrical Control Line Specification
  • For all MOST speed grades
  • Feature is optional

New test specification:

  • MOST Extended Core Compliance Test Specification:

Electrical Control Line

  • Compliance Test is mandatory if ECL is implemented

Motivation

3

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www.ruetz-system-solutions.com experts in automotive data communication

Motivation MOST Compliance Test Scopes

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Basic MOST Core Compliance Extended MOST Physical Layer Compliance MHP ECL

we provide:  all scopes for compliance verification  all available MOST speed grades

Full Limited

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www.ruetz-system-solutions.com experts in automotive data communication

Motivation MOST Compliance Test Scopes

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Basic MOST Core Compliance Extended MOST Physical Layer Compliance MHP ECL

We provide:

  • > Ready-to-use, fully automated test systems for all test scopes

Full Limited Physical Layer Lab TESTERLYZER pro compliance TTsuite TTsuite

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www.ruetz-system-solutions.com experts in automotive data communication

Motivation MOST Compliance Test Scopes

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Basic MOST Core Compliance Extended MOST Physical Layer Compliance MHP ECL Full Limited Physical Layer Lab TESTERLYZER pro compliance TTsuite TTsuite

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www.ruetz-system-solutions.com experts in automotive data communication

  • 1. Motivation
  • 2. ECL in a MOST Network
  • 3. Test Specification Development Process
  • 4. Test Solution
  • 5. Conclusion

Agenda

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www.ruetz-system-solutions.com experts in automotive data communication

Features

  • Triggering a system test
  • System test initiator

1

  • System test participant

1..19 Sequence:

  • Waking up the system via EWU
  • Electrical wake-up initiator

1..n

  • Electrical wake-up participant

1..(20-n) Sequence:

ECL in a MOST Network

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www.ruetz-system-solutions.com experts in automotive data communication

4 Kinds of System Tests

ECL in a MOST Network

9 1 1 1 1

RBD Alive Coding error / threshold SSO / CU

Start sequence Parameter sequence

Result sequence

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www.ruetz-system-solutions.com experts in automotive data communication

System Test Message Results

ECL in a MOST Network

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E1 O1 E2 O2

1 2 …

Identification of participants via unique node class:

1 x x

  • device not alive or
  • test is not supported
  • MOST signal result

Start sequence Parameter sequence

Result sequence

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www.ruetz-system-solutions.com experts in automotive data communication

  • 1. Motivation
  • 2. ECL in a MOST Network
  • 3. Test Specification Development Process
  • 4. Test Solution
  • 5. Conclusion

Agenda

11

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www.ruetz-system-solutions.com experts in automotive data communication

Report Test Suite com pile analyze Test Specification Execution

System Adaptor Platform Adaptor Component Handling Control Types, Data Behavior Components Ports Timer TCI TRI Codecs Test Management System Under Test (SUT) System Adaptor Platform Adaptor Component Handling Control Types, Data Behavior Components Ports Timer TCI TRI Codecs Test Management System Under Test (SUT)

apply

Executable Test Specification

  • MCTG draws first version of Test

Specification as GFT

(GFT: graphical representation of TTCN-3)

  • GFTs are compiled with TTsuite to get

executable testcases

  • Testcases are tested with TTsuite on a

reference implementation

  • Recommendations for improvement

for the Test Specification

Test Specification Development Process – A Success Story

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www.ruetz-system-solutions.com experts in automotive data communication

Report Test Suite com pile analyze Test Specification Execution

System Adaptor Platform Adaptor Component Handling Control Types, Data Behavior Components Ports Timer TCI TRI Codecs Test Management System Under Test (SUT) System Adaptor Platform Adaptor Component Handling Control Types, Data Behavior Components Ports Timer TCI TRI Codecs Test Management System Under Test (SUT)

apply

Benefits

  • Accelerated development process
  • Test Specification is abstract, precise

and complete

  • High quality and high level of maturity

prior to release

  • Test Suite is available

before release of Test specification

Test Specification Development Process – A Success Story

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www.ruetz-system-solutions.com experts in automotive data communication

  • 1. Motivation
  • 2. ECL in a MOST Network
  • 3. Test Specification Development Process
  • 4. Test Solution
  • 5. Conclusion

Agenda

14

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www.ruetz-system-solutions.com experts in automotive data communication

Challenges:

  • Timing precision, especially at the header - response switch
  • Variable pulse width, also for testing robustness and limits

Test Solution

15 Start sequence Parameter sequence

Result sequence

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www.ruetz-system-solutions.com experts in automotive data communication

Optimized Tools for ECL Testing (1/ 2)

  • ECL Box
  • Generates or measures ECL pattern for initiator or participant
  • ECL pulses can be programmed individually
  • A failure injection is easily reproducible
  • Measurement accuracy: 1 ms
  • CAN restbus simulation

Test Solution

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www.ruetz-system-solutions.com experts in automotive data communication

Optimized Tools for ECL Testing (2/ 2)

  • Breakout Box
  • Switches different test setup configurations automatically
  • Performs current measurements
  • Measurements can be triggered

by ECL signal (e.g.: t_testsync)

Test Solution

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www.ruetz-system-solutions.com experts in automotive data communication

  • 1. Motivation
  • 2. ECL in a MOST Network
  • 3. Test Specification Development Process
  • 4. Test Solution
  • 5. Conclusion

Agenda

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www.ruetz-system-solutions.com experts in automotive data communication

  • Reliability
  • Global consistency
  • Testing with little effort
  • Rapid test results
  • Cost effectiveness

Conclusion

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Benefits

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www.ruetz-system-solutions.com experts in automotive data communication 20

Conclusion

Testing process by Ruetz System Solutions includes:

  • Easy preparation for the test
  • Transparency:
  • Executable Test Specifications
  • Detailed Test Reports

Support for in-house tests:

  • Tools and Processes are available
  • High Degree of Test Automation
  • Professional Training, Support and Maintenance
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www.ruetz-system-solutions.com experts in automotive data communication

Walter-Gropius-Straße 17 80807 München Germany T + 49 / 89 / 200 04 13-0 F + 49 / 89 / 200 04 13-99 info@ruetz-system-solutions.com

Thank you for your attention!

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Dr.-Ing. Terezia Toth