An embedded system can defined as a system that has embedded software and computer-hardware, which makes it a system dedicated for an application (s) or specific part of an application or product or a part of a larger system.
An embedded system is characterized by the following:
- Real-time and multi-rate operations that define the ways in which the system works, reacts to events, interrupts and schedules the system’s operations in real time.
- Complex algorithms.
- Complex graphic user interfaces (GUI) and other interfaces.
- Dedicated functions.
An embedded system is usually designed by keeping in consideration a number of constraints, namely:
- The available system memory.
- The available processor speed.
- The need to limit power dissipation when running the system continuously in cycles of ‘wait for events’, ‘run’, ‘stop’, ‘wake-up’ and ‘sleep’.
Related: Exploring Raspberry Pi: Interfacing to the Real World with Embedded Linux
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