E-TDD – Embedded Test Driven Development a Tool for Hardware-Software Co-design Projects
Test driven development (TDD) is one of the key Agile practices. A version of CppUnitLite was modified to meet the memory and speed constraints present on self-contained, high performance, digital signal processing (DSP) systems. The specific characteristics of DSP systems required that the concept of refactoring be extended to include concepts such as “refactoring for speed”. We provide an experience report describing the instructor-related advantages of introducing an embedded test driven development tool E-TDD into third and fourth year undergraduate Computer Engineering Hardware-Software Co-design Laboratories. The TDD format permitted customer (instructor) hardware and software tests to be specified as “targets” so that the requirements for the components and full project were known “up-front”. Details of CppUnitLit extensions necessary to permit tests specific for a small hardware-software co-design project, and lessons learnt when using the current E-TDD tool, are given. The next stage is to explore the use of the tool in an industrial context of a video project using the hybrid communication-media (HCM) dual core Analog Devices ADSP-BF561 Blackfin processor.
KeywordsEmbed System Very Long Instruction Word Video Project Pair Programming Agile Development
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- 1.Tassey, G.: The Economic Impacts of Inadequate Infrastructure for Software Testing. National Institute of Standards and Technology Report (2002)Google Scholar
- 2.Dahlby, D.: Applying Agile Methods to Embedded Systems Development. Embedded Software Design Resources 41, 101–123 (2004)Google Scholar
- 3.Feathers, M.: CppUnitLite Source code (December 2004), http://c2.com/cgi/wiki?CppUnitLite
- 4.Analog Devices Blackfin and TigerSHARC DSP.User and hardware manuals (December 2004), http://www.analog.com/dsp
- 5.Smith, M., Martin, A., Huang, L., Bariffi, M., Kwan, A., Flaman, W., Geras, A., Miller, J.: A look at test driven development (TDD) in the embedded environment: Part 1. Circuit Cellar magazine 176, 34–39 ( March 2005)Google Scholar
- 6.Smith, M., Martin, A., Huang, L., Bariffi, M., Kwan, A., Flaman, W., Geras, A., Miller, J.: A look at test driven development (TDD) in the embedded environment: Part 2. Circuit Cellar magazine 177, 60–67 (2005)Google Scholar
- 7.Fowler, M.: Refactoring: Improving the Design of Existing Code. he Addison-Wesley Object Technology Series. Addison-Wesley, Reading (1999)Google Scholar
- 8.Williams, L., Kessler, R.R., Cunningham, W., Jeffries, R.: Strengthening the case for pair programming. IEEE Transactions on Software Engineering, 19-25 (2000)Google Scholar
- 9.Feathers, M.C.: Working Effectively with Legacy Code. Prentice Hall PTR, Upper Saddle River (2005)Google Scholar