Lecture 1 - Introduction to Embedded Systems PDF

Software Development for Embedded and Realtime Systems Introduction to Embedded and Realtime Systems Course Objectives ⚫ Key software development phases for embedded systems ⚫ Problem definition ⚫ Develop an architecture ⚫ Develop a design ⚫ Implementatio...

Software Development for Embedded and Realtime Systems Introduction to Embedded and Realtime Systems Course Objectives ⚫ Key software development phases for embedded systems ⚫ Problem definition ⚫ Develop an architecture ⚫ Develop a design ⚫ Implementation (Component-based) ⚫ Verification and Validation Software Development for Embedded and 2 Realtime Systems What is an Embedded System? ⚫ A combination of hardware and software components to form a computational engine that will perform a specific function. ⚫ Perform in reactive and time-constrained environments ⚫ Responds to the environment via sensors and controls the environment using actuators ⚫ Realtime – hard real time vs soft real time ⚫ Multi-rate - can handle multiple processing rates Software Development for Embedded and 3 Realtime Systems Typical Embedded System Software Development for Embedded and 4 Realtime Systems Abstract Model of an Embedded System Software Development for Embedded and 5 Realtime Systems Example Embedded System Software Development for Embedded and 6 Realtime Systems Hard vs Soft Real time Software Development for Embedded and 7 Realtime Systems Examples of hard and soft real time systems Software Development for Embedded and 8 Realtime Systems Hard real time safety critical system Software Development for Embedded and 9 Realtime Systems Real-time vs Time-shared Software Development for Embedded and 10 Realtime Systems Real time system constraints ⚫ A computing system being hard real-time says nothing about the magnitudes of the deadlines. ⚫ may be microseconds or weeks. ⚫ A real-time system task and execution environment must be adjusted to enable a schedule and resource allocation which meets all deadlines. Software Development for Embedded and 11 Realtime Systems Real time event categories ⚫ Asynchronous events ⚫ entirely unpredictable, e.g. cell phone call arriving at a cellular base station ⚫ Synchronous events ⚫ predictable events and occur with precise regularity, e.g. video streaming ⚫ Isochronous events ⚫ occur with regularity within a given time window, ⚫ e.g. audio data in a networked multimedia application must appear within a window of time when the corresponding video stream arrives Software Development for Embedded and 12 Realtime Systems References ⚫ Chapter 1: Oshana, Robert, ed. Software Engineering for Embedded Systems: Methods, Practical Techniques, and Applications. Newnes, 2013. Software Engineering for Embedded Systems 13 Thank you for your attention.