Design Patterns in Resource Constrained Embedded Systems

Designing embedded firmware for resource-constrained systems is a delicate balance between performance, power efficiency, and code clarity. Unlike application-level development on full-fledged operating systems, these systems operate with limited SRAM (often less than 2KB), single-core processors, and no built-in support for multitasking. As such, firmware engineers must architect software with deterministic behavior, minimal stack usage, and absolute control over timing.
This article explores patterns that have been adapted to low-level environments such as AVR microcontrollers (e.g., ATtiny1616), where interrupts, non-blocking execution, and low-power states are the rule, not the exception.
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