Filesystems in embedded systems usually get treated as an implementation detail: picked late, configured with the defaults, and rarely touched again. In practice, a filesystem becomes a long-lived contract between firmware, storage media, update mechanisms, and whatever data pipeline sits on top of it. This post looks at embedded filesystems
Controller Area Network gets introduced as a "simple" fieldbus: ID, DLC, payload, done. In real systems, that simplicity hides a deeper reality. CAN messages become long-lived contracts between firmware, hardware, gateways, and cloud pipelines. This post reframes CAN not as a transport but as a shared language, where
Most performance problems we've run into in embedded systems didn't come from weak hardware or bad algorithms. They came from decisions that felt harmless at the time, extra logs during bring-up, convenient abstractions, background helpers added "just for safety." None of these broke the
Choosing a filesystem in embedded firmware looks simple until real devices start writing logs every few seconds, saving snapshots, updating configs, and recovering from unexpected resets. What starts as a neat API turns into a fight with corruption, wear, mount-time failures, memory stalls, directory explosions, and behavior that rarely shows
Linker scripts often get treated as arcane build artifacts, copied from a reference project, tweaked cautiously, and rarely revisited. That works until it doesn't. As modern MCUs introduce fragmented memory regions, tightly coupled RAM, external flash, and DMA-sensitive buffers, vague linker assumptions quietly turn into runtime failures. This
When DMA problems appear, they rarely announce themselves with a big red flag. More often it's vague instability: a frame that arrives corrupted once every few thousand cycles, a sensor payload that occasionally looks stale, a buffer that behaves differently at low throughput versus sustained load. In our
If you've ever shipped a long-running embedded product that relies on stable weight readings, you've probably learned a painful truth: load-cell systems rarely fail in the analog domain first, they fail in firmware. Not because firmware is the root cause, but because firmware is the first
If there's one thing every embedded engineer learns the hard way, it's that logging is both a diagnostic superpower and a silent system killer. Too much verbosity buries the actual signal. Too little structure makes triage impossible. And remote-capture methods, if naively designed, can distort the
Yocto gives embedded teams extraordinary power, and it gives them just as much power to break their own systems in subtle, silent ways. Anyone who's shipped a commercial Linux-based device knows this: your build system becomes part of your product's architecture. If the layering model is
A deep dive into architectural failures, race conditions, timing drift, and buffer inconsistencies, and how we fixed them. When we began integrating the PCM1862 across our modular SoM platforms, the expectation was straightforward: configure clocks, bring up I2S, wire DMA, and start capturing clean audio frames. Instead we ran into