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Lec16SkillOne - Organization of Software Layered software...

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ECE 471 16-CSkill-1 Lecture 16 Software Development Techniques Outline Organization of software Efficient coding techniques macros connector ## Summary
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ECE 471 16-CSkill-2 Organization of Software Layered software and building blocks (BB) can reduce software complexity increase software scalability enhance software maintainability improve software reusability support team work
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ECE 471 16-CSkill-3 A Simple Layered Software Organization Application Layer Hardware Abstraction Layer Hardware Physical Layer Driver Layer
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ECE 471 16-CSkill-4 A Software Organization with More Detailed Layers Application Layer: Application Driver interface layer Hardware Physical Layer Driver Layer: Application interface layer Protocol layer Hardware Abstraction Layer Device independent level Device dependent level
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ECE 471 16-CSkill-5 Application Layer Definition : The programs that are specific to the application but independent of computer platforms and communication protocols. The application layer may not be reusable. Why use application layer : Enable the application program to use different hardware and use different communication protocols What knowledge is needed to design the application layer a clear understanding of the particular application, and the functionality and information provided by the hardware abstraction layer and driver layer.
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ECE 471 16-CSkill-6 Definition : The software that provides the hardware configuration, signal handshaking, packing of bits and bytes into abstracted messages and unpacking messages into bit/byte strings. Why use driver layer : The code is independent of application programs. The code may be reused in different applications. Isolates application programs from performing detailed hardware configuration, communication interfaces, and message formatting . Driver Layer
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ECE 471 16-CSkill-7 Definition : The programs that define or express the hardware functions or components with abstracted logical functions and addresses.
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