EE 472 Embedded Systems Dr Shwetak Patel Assistant

EE 472 – Embedded Systems Dr. Shwetak Patel Assistant Professor Computer Science & Engineering Electrical Engineering

Agenda n Engineering Design Cycles n Structured Design n Unified Modeling Language (UML) Shwetak N. Patel - EE 472 2

Why care about the design process?

Makes development efficient! n Easy to fall into the trap of ah-hoc building n Spending 1 hour planning can save 10 hours debugging!! Shwetak N. Patel - EE 472 4

The Development Cycle n Product specifications to final product Shwetak N. Patel - EE 472 5

The Development Stages n Requirements analysis and specs n Conceptual design n Detailed program design n Implementation n Unit and integration testing n System delivery n Maintenance Shwetak N. Patel - EE 472 6

Example Development Life Cycle Models n The Waterfall Model n V cycle n Spiral n Rapid Prototyping n Agile Methods Shwetak N. Patel - EE 472 7

Waterfall Model Shwetak N. Patel - EE 472 8

V Cycle Shwetak N. Patel - EE 472 9

Spiral Shwetak N. Patel - EE 472 10

Rapid Prototyping n Break the problem into little pieces n Get a front-end implementation out quick Shwetak N. Patel - EE 472 11

Agile Methods n n Extreme Programming n Focus on small increments n Pair-wise or team programming Sprints n n Well defined quick tasks to get something out Scrum� n Quick meetings daily and/or weekly Shwetak N. Patel - EE 472 12

The Actual Design Process n Key steps for success: n Requirement definitions n System specification n Functional design n Architectural design n Protoyping Shwetak N. Patel - EE 472 13

Structured Design n Breaking down a problem and systematically deriving a solution n How do you represent this? Shwetak N. Patel - EE 472 14

Unified Modeling Language (UML) n A “language” for specifying various aspects of the product during the design process n Universal way of sharing ideas Shwetak N. Patel - EE 472 15