400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org 2005-01-0075 Testing Embedded Engine Controllers Using Programmable Test Techniques Ronald J. DeKoekkoek, Roberto I. DePaula and Daniel J. Richardson General Motors Corporation Reprinted From: Electr onic Engine Controls 2005 (SP-1975) 2005 SAE World Congress Detroit, Michigan April 11-14, 2005 SAE TECHNICAL PAPER SERIESDownloaded from SAE International by University of Minnesota, Wednesday, August 01, 2018The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE’s peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth DriveWarrendale, PA 15096-0001-USAEmail: [email protected]: 724-772-4028Fax: 724-772-4891 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-1615Email: Customer [email protected] ISSN 0148-7191Copyright © 2005 SAE International Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publication by SAE should send themanuscript or a 300 word abstract to Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Minnesota, Wednesday, August 01, 2018ABSTRACT Control System testing determines whether the embedded controller (software and its HWIO / hardware system) are operating according to specification. General Motors Powertrain (GMPT) has increased its span of test coverage through the use of automated testing. Further use of this type of testi ng is advised to enhance quality in a field that is rapidly growing more complex. MAIN SECTION DEFINITION The use of automated testing has been a valuable testing option for Powertrain controllers for years. Tool evolution has made this more affordable and software reuse and complexity has made this a necessary need. Strategic use of these tools is a priority for best software quality. Controller Programmable Testing (CPT) is known by many names - , lights out testing, automation, auto test are a few of the common names. The intent of this process is to evaluate production intent code, with its HWIO, in the engine controller using a computer controlled test cycle. The computer operated test cycle allows time specified setting of the Engine Control ler’s inputs and monitoring of the controllers outputs and additional viewing of the controllers communication nodes and global variables. The testing specifies expected results for the CPT cycles and generates a report to document the results. BENEFITS OF CPT 1. Repeatability: Well written CPT tests define the state of all the controller’s inputs and execute the control of these settings and monitors the controller’s parameters and outputs in a programmed and repeatable sequence. 2. Minimal Execution Ef forts: Once the CPT sequence is written the execution of these tests takes minimal effort. Set up requires initializing the test tool and configuration files for a given software set and hardware system. Once the set up is complete the user needs to star t the test and wait for the results. The user does not have to be on-site, but can review results later.