Liangxu, a self‑taught IT professional now working as a Linux development engineer at a Fortune 500 multinational, shares extensive Linux knowledge—fundamentals, applications, tools, plus Git, databases, Raspberry Pi, etc. (Reply “Linux” to receive essential resources.)
This article explains the open‑drain nature of I2C, why pull‑up resistors are essential for providing a high level, ensuring signal integrity and enabling wired‑AND logic, and offers practical formulas, recommended resistor ranges for different speeds, STM32 configuration examples, and debugging tips.
This guide explains why FreeRTOS has become essential, what interviewers truly test, practical learning paths for beginners to advanced users, common pitfalls, and how to apply the RTOS effectively to solve real embedded problems.
The article explains why the perceived "cold winter" in embedded development is actually a sectoral shift, contrasting the fast‑paced, low‑margin consumer electronics market with the high‑reliability, high‑demand fields of automotive, industrial control, and emerging AIoT opportunities.
The article explains the essential role of a base‑emitter (BE) resistor in transistor circuits—providing a stable bias, protecting against ESD, speeding up turn‑off, reducing noise sensitivity—and offers practical guidelines for selecting its value and integrating it into common embedded designs.
This tutorial explains what function pointers are, how to declare and use them in C, and demonstrates practical embedded‑system patterns such as callbacks, state machines, command dispatch, and advanced techniques like pointer arrays and struct members, while highlighting common pitfalls.
This article explains the fundamental differences between C arrays and pointers by examining memory layout, mutability, sizeof behavior, function parameter handling, multidimensional arrays, and practical best‑practice guidelines, providing clear code examples that reveal why declarations like char s1[] = "liangxu" and char *s2 = "liangxu" behave differently.
This article explains the fundamental concepts and step‑by‑step workflow of ADC conversion in embedded systems, covering sampling, hold, quantization, encoding, and output stages, and provides detailed STM32 HAL code examples along with tips for improving accuracy.
The article outlines typical behaviors that reveal a programmer’s lack of real experience—such as massive one‑off commits, unreadable code, juggling unfinished branches, ignoring feedback, repeating mistakes, chasing every new technology, and slacking on learning—while offering concrete advice on how to recognize and overcome them.
This tutorial explains the SW-18010P vibration sensor’s features, pinout, and operating principle, then provides detailed hardware wiring, LED initialization, sensor initialization, interrupt handling, and a complete STM32F103C8T6 firmware example that lights a three‑color LED based on vibration detection.
This tutorial explains how to use the YS‑IRTM NEC infrared codec module with an STM32F103C8T6 MCU to decode remote‑control signals, map them to UART commands, and drive a three‑color LED, covering hardware wiring, protocol details, UART configuration, and full source code.
