/proc is a special virtual file system. It does not exist on a physical disk but is dynamically generated by the kernel in memory. Its main purpose is to serve as an interface that allows user-space programs (such as ps, top, htop, etc.) to easily obtain runtime information about the kernel and processes, and in … Read more
Members of the training team encountered a problem during the competition: After completing the PLC project and the touch screen, they were able to download it to the hardware, but pressing the buttons on the touch screen would trigger an error message. The students were unable to resolve this issue on-site, and after the competition, … Read more
<Input and Output of Data>From beginner to expert, from Hello World to ACMAll practical content, no textbooks required! 1. Formatted Output with printf Function Basic Usage of printf Function <span>printf</span> is responsible for outputting information to the screen. Basic Syntax: printf("format control string", output item list); Detailed Explanation of Format Specifiers Format Specifier Meaning Example … Read more
Hello everyone, I am a programmer who loves to share. I am happy to share my experiences and understanding from my work. -begin- In embedded development, frequently flashing images for debugging is inefficient. However, using QEMU to simulate an ARM environment in conjunction with NFS (Network File System) allows the program to read files directly … Read more
We have always believed in the concept of “less is more, slow is fast.” This idea has been increasingly accepted in the field of mathematics education, and it is equally profound in the journey of teenagers learning C++ programming. Many parents and students think that learning programming means quickly mastering all the syntax of C++ … Read more
Xilinx 1G_PCS_PMA Experiment Reference Document PG047 1G_PCS_PMA Example Project This project implements the conversion between GMII and GT interfaces, where the GMII interface connects to an external PHY chip. graph LR; gmii_txd –> |IODELAY|gmii_txd_delay; gmii_txd_delay –> |BUGIO Sampling|gmii_txd_iff; gmii_txd_iff –> |bufr Sampling|gmii_txd_reg; gmii_txd_reg –> |elastic_buffer|gmii_txd_fifo —> gt; gmii_rxd_int(gt) –>|userclk2 Sampling|rxd_obuf; rxd_obuf –>|OBUFT|gmii_rxd; Simulation Diagram: Notes: … Read more
Pseudocode in Assembly Language: A Bridge to Understanding Low-Level Logic Abstract: When learning and writing assembly language, directly facing the cumbersome instructions and register operations can often be daunting. Pseudocode serves as a descriptive tool that lies between natural language and programming language, helping us clearly plan program logic and acting as an excellent bridge … Read more
This article is based onSiegel’s core conceptual framework, combined withthe real challenges and cognitive needs of embedded engineers, using the metaphor of “the brain as a system, consciousness as firmware” to organize apractical note that can be directly used for daily practice. ✅ 1. Overview of Core Concepts: Three Brains, Four Quadrants, Integration, Awareness Concept … Read more
In-Depth Analysis of Linux Device Trees 1. Basic Concepts and Historical Background of Device Trees 1.1 What is a Device Tree? A Device Tree is a data structure that describes hardware configuration, using a tree structure to represent system hardware resources in text form, including CPU, memory, buses, peripherals, etc. The core idea of the … Read more
Unveiling the Mysteries of Pointers In the fascinating world of C language, pointers are undoubtedly the most dazzling yet elusive star. They act like a magical key; mastering them allows one to unlock the treasure trove of C language’s powerful features, delving into the mysterious realms of operating systems, hardware drivers, and low-level development. However, … Read more