Firmware
A fleet of connected devices is a relentless text generator. Every device runs a dozen cooperating services, and each one narrates its life in log lines: startup banners, retries, sensor readings, stack traces. Across a hundred-plus devices that adds up to hundreds of thousands of lines a day, spiking into
Firmware
There is a particular kind of failure that haunts always-on devices, and it almost never shows up in the lab. The firmware runs perfectly for a day, a week, a month — and then, somewhere out in the field, it quietly stops. No crash log, no stack trace, just a device
Modern device systems do not usually fail because one request is too large. They fail because many reasonable requests arrive at the wrong time, under the wrong retry behavior, with no shared contract between client and server. That pattern shows up most clearly during reconnects. Devices go offline for minutes
Firmware
The pipeline ran. Interrupts fired. DMA counters incremented. Every status register said the system was healthy. The buffers were empty. Three days of debugging, one register field.
Firmware
In the high-stakes world of embedded firmware development, "optimization" is usually the golden word. We optimize for speed, for power consumption, and perhaps most frantically, for memory. We count bytes like misers counting pennies, shaving off struct padding and squashing enums into uint8_t wherever possible. We analyze
Firmware
The build failed at 11 PM on a Thursday. Not from our code — from a missing pkg-config path. The CMake configure step for Mosquitto was resolving openssl.pc from /usr/lib/x86_64-linux-gnu instead of from the target sysroot. We'd seen this class of error before. Fix it,
Software
When users tell you "the chat feels slow," the first instinct is to blame the model. Bigger LLM, longer prompt, more retrieved context — those are the obvious suspects. But when we profiled our AI assistant's chat endpoint end-to-end, the model itself was already running about as
From Raw Bayer to JPEG on STM32H5 in ~200ms When a Camera Sensor Captures an Image When a camera sensor captures an image, it does not directly produce a photograph. Instead, it generates a grid of raw intensity values arranged behind a color filter mosaic. On a desktop system, converting
Firmware
TL;DR: Firmware that passes physical hardware testing still ships with "Heisenberg bugs" that disappear during testing but appear disastrously under chaotic, real-world conditions. The Ghost strategy solves this by introducing an injection point at the seam between the Driver and Logic layers, feeding the Logic layer with
Firmware
In high-performance embedded systems, data integrity and deterministic timing are paramount. Controller Area Network (CAN) has long been the standard for reliable automotive and industrial communication. With the transition to CAN FD (Flexible Data-rate), we gained higher bandwidth and larger payloads. However, standard CAN FD, while robust for short control