In-Depth Analysis of Pointer Mechanisms in Linux 1. Basic Concepts and Essence of Pointers 1.1 What is a Pointer A pointer is one of the most fundamental and complex concepts in the C language. Essentially, a pointer is a variable that stores a memory address. Just like a house number in real life, a pointer … Read more
In embedded development, especially in programs for microcontroller OS-less systems, one of the most common mistakes is the excessive use of global variables.This phenomenon is often seen among programmers transitioning from early assembly language and beginners, who tend to treat global variables almost like function parameters.They define numerous chaotic structures in .h files, declare a … Read more
Technological innovation is changing the way every developer works. I have been involved with Arduino for over a decade. From initially searching the internet for information and example code to manual debugging, to now programming with AI assistance, this journey has allowed me to witness technological innovation and experience a revolutionary change in development models. … Read more
In November 2025, while most electrical automation learners were still troubled by the lack of training equipment, Jicheng Training quietly launched a revolutionary virtual simulation platform that combines reality and virtuality. This virtual training system, which replicates real equipment 1:1, supports Mitsubishi and Siemens PLC controllers, allowing students to complete the entire training process from … Read more
Today marks the 900th day of learning programming with the cool drizzle! Hello, everyone! This is the GESP202509 Level 2 problem set. Day 900 GESP202509 Level 2 Multiple Choice Question Question 12 Question 12: The output of the following C++ code is related to the count of numbers associated with 5. A number is defined … Read more
A scenario for troubleshooting language version exceptions in a Linux deployment. In the Euler environment, there was a language version issue when deploying software, where the system environment needed to be set to Chinese, but it defaulted to English. Therefore, adjustments were made using the conventional locale command, but after setting it, neither source nor … Read more
Follow+Star Public Account Number, don’t miss out on exciting contentAuthor | strongerHuangWeChat Public Account | Embedded ColumnIn recent years, major manufacturers have been laying out RISC-V processors, and the number of microcontrollers based on RISC-V is increasing. However, compared to conventional (ARM) microcontrollers, the RISC-V ecosystem, especially the development tools, still has a certain gap.Recently, … Read more
Microcontroller technology is based on the use of chips and external devices, achieved through software and hardware development, ultimately realizing comprehensive technology for electronic products. First, it is important to confirm that the learning and usage curve for microcontrollers is not steep. Various chip manufacturers are also providing graphical development tools, such as ST’s STM32CubeMX, … Read more
The true distance from electrician to engineer is not about how many instructions you master, but whether you understand the ‘rhythm of life’ of an automation system. When you first encounter a PLC, have you ever been confused: these ladder diagrams look very much like relay circuits, but why is there always a subtle difference … Read more
Wiring Diagram for Car Back-and-Forth MovementI/O Allocation Table Ladder Diagram ProgramPLC Wiring DiagramProgram Debugging and Result AnalysisControl Platform Operation PanelPress SB2 (click i0.0f) to connect I0.0, then Q0.0 outputs, and the car moves to the right (corresponding indicator Q0.0 lights up);When the car touches the right limit switch SQ2 (click i0.4f to simulate pressing), I0.4 … Read more
