Legacy firmware and software modernization
When a product still works but its software can no longer be changed safely, the first goal is to regain control: understand current behavior, make builds and tests repeatable, reduce risk and plan evolution without disrupting operations.
When an existing codebase needs attention
A legacy project does not automatically need a rewrite. The work starts from what still works, the material actually available and the product constraints, then identifies what should be stabilized, replaced or migrated.
- Firmware or software inherited from suppliers, developers or teams no longer available.
- Non-repeatable builds, obsolete dependencies, undocumented toolchains or manual release procedures.
- Recurring defects and risky changes because tests, logs or an architecture map are missing.
- Porting to supported MCUs, RTOSs, embedded Linux BSPs, libraries, graphical frameworks or toolchains.
What it includes
Collect repositories, builds, binaries, logs, schematics and procedures to establish a verifiable starting point.
Map modules, dependencies, flows and risks, then add focused fixes, logging and regression tests.
Move between MCUs, RTOSs, Linux BSPs, libraries, toolchains or frameworks with compatibility and rollback considered early.
Build and release procedures, architecture, interfaces and a maintenance plan for an internal team or the next supplier.
Working method
- Review available material, necessary access and product-continuity constraints.
- Audit current behavior, build, dependencies and the highest-risk areas.
- Define stabilization, test and migration steps that can be verified, avoiding unjustified rewrites.
- Deliver code, documentation and an evolution or handover plan.
Related guides and pages
A first step to order risks, available material and priorities.
Support for architecture, debugging and stabilization of an existing firmware base.
Evolve existing tools, applications and software integrations.
Automate checks to reduce change and production risk.
Frequently asked questions
Do we need to have all source code?
No, but available material, access and rights to use it need to be made clear early. Depending on the case, work can begin from repositories, binaries, documentation, logs, schematics and observable behavior.
Does everything need to be rewritten?
Not by default. The first step is to isolate fragile areas and decide whether to stabilize, refactor, replace a module or plan a gradual migration.
Can work continue while the product is in the field?
Yes. The plan can separate urgent interventions, compatible improvements and migrations to validate on a variant or test environment before release.