Understanding Technical Debt — With C Examples
Understand technical debt with C examples. Learn the types of debt, how to recognize it, and practical strategies for managing and paying it down.
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Software Design
Software design principles applied to C — SOLID, DRY, KISS, YAGNI, design patterns (state machine, observer, strategy, factory), code smells, refactoring, and firmware architecture.
Module Design in Embedded C — Structuring .h and .c Files
Learn how to design clean, maintainable modules in embedded C. Structure .h and .c files with proper encapsulation, static functions, and opaque pointers.
Law of Demeter (Principle of Least Knowledge) in C — With Examples
Learn the Law of Demeter (Principle of Least Knowledge) in C with examples. Reduce coupling by only talking to immediate friends, not reaching through struct… Read More »Law of Demeter (Principle of Least Knowledge) in C — With Examples
Testing Embedded C Code — Unit Tests, Mocks, and Frameworks
Learn how to test embedded C code with unit tests and mocks. Use Unity/CMock frameworks to test on your PC without hardware.
Firmware Architecture Patterns — Super-Loop, Event-Driven, and RTOS
Compare 4 firmware architecture patterns: super-loop, time-triggered, event-driven, and RTOS-based. Choose the right one for your embedded project.
Hardware Abstraction Layer (HAL) Design in C — With Examples
Learn how to design a Hardware Abstraction Layer (HAL) in C. Build portable, testable embedded code with clean hardware interfaces and mock implementations.
Building a Driver Interface in C — A Complete Example
Build a complete driver interface in C combining Strategy, Factory, and DIP patterns. One interface, multiple hardware implementations, fully testable.
Liskov Substitution Principle (LSP) in C
Learn the Liskov Substitution Principle with practical C examples. See how interchangeable modules (like storage drivers) should behave consistently through a common interface.
Open/Closed Principle (OCP) in C
Learn the Open/Closed Principle with practical C examples using function pointers. See how to extend behavior without modifying existing, tested code.
Single Responsibility Principle (SRP) in C
Learn the Single Responsibility Principle with practical C examples. See how splitting a module into focused responsibilities makes code easier to maintain, test, and reuse.