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Electronics - Embedded Systems I

These are some notes on embedded systems to gain a familiarity with the technology and the terminology used.

The worst-case execution time (WCET) is an upper bound on the execution of tasks. Computing such a bound is undecidable in the general case. Computing tight upper bounds on the execution time may still be difficult.

• Software synthesis tools - computers
• Hardware/software partitioning
• Dynamic schedulers generate overhead at run-time.
• The dispatcher is activated by the synchronized clock tick. It performs the action that has been planned for this instant.
• . . . predictability of the system behavior is the most important concern.
• Mixed hardware/software systems in which some tasks are mapped to hardware.
• l_i is the laxity or slack.

Under this scenario, preemption can potentially reduce maximum latencies.

Configurability is one of the main characteristics of embedded OSs.

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