Summary

This blog explains three practical techniques for migrating embedded firmware from C to C++, focusing on safe, incremental strategies that work on constrained targets. Readers will learn how to preserve existing C interfaces, adopt embedded-friendly C++ idioms (like RAII and encapsulation), and update build and testing practices to support a mixed C/C++ codebase.

Key Takeaways

• Adopt an incremental migration approach using C++ wrappers and adapter layers to preserve ABI compatibility with existing C code.
• Apply RAII and scoped resource-management patterns to eliminate common C errors (resource leaks and improper shutdown) without dynamic allocation.
• Encapsulate hardware access in well-defined classes to improve modularity and testability while keeping ISR and low-level constraints intact.
• Update build, link, and startup code (extern "C", linker scripts, constructors) and integrate unit tests/CI to validate the migration at each step.

Who Should Read This

Intermediate firmware engineers and technical leads working on ARM Cortex-M or RTOS-based devices who need a practical, low-risk path to introduce C++ into existing C codebases.

Still RelevantIntermediate

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