In the field of embedded systems and industrial control, the concept of a Real-Time Operating System (RTOS) is very important. They ensure that tasks are completed within a specific time frame, thus meeting strict timing requirements. This article will introduce the fundamentals of RTOS programming in C and provide code examples to help readers understand. … Read more
‖ System Learning Life is like a marathon; occasionally stopping to fish allows you to go further. In the field of industrial automation, real-time communication protocols act as the neural center, determining the response speed and synchronization accuracy of the entire system. Among them, EtherCAT and Profinet are two major technical standards that occupy a … Read more
In modern computing, multithreaded programming is a common technique that allows programs to execute multiple tasks simultaneously, thereby improving efficiency and responsiveness. In C, we can use the POSIX Threads (pthread) library to implement multithreaded programming. This article will introduce the fundamentals of multithreading in C and demonstrate with example code. 1. What is Multithreading? … Read more
Shared memory is an inter-process communication (IPC) mechanism that allows multiple processes to access the same memory area. It is highly efficient because data does not need to be copied between processes but is read and written directly in the shared memory. In this article, we will introduce how to use shared memory in the … Read more
Recently, I have been researching the Bluetooth protocol stack and came across an interesting fact. We know that Apple’s AirPods have ushered in a new era of true wireless Bluetooth headphones (TWS), currently dominating a large share of the market. Many domestic manufacturers have followed suit, but due to Apple’s registered patents, they find themselves … Read more
In modern computing, multithreaded programming is a common technique that allows programs to execute multiple tasks simultaneously, thereby improving efficiency and responsiveness. The C language provides robust multithreading support through the POSIX threads (pthread) library. This article will detail how to create and manage threads in C, as well as how to synchronize them. 1. … Read more
The previous article introduced how the clocks of the Central and Peripheral in a piconet are synchronized, as well as the time slots (hereafter referred to as slots). Now, we will discuss how to transmit and receive.1. Transmit/Receive TimingIn a piconet, the Central always starts transmitting on even slots (i.e., when CLK1=0), while the Peripheral … Read more
Click the blue text Follow us ETHERCAT Accessories Product Overview ETHERCAT Accessories are used for the ETHERCAT data acquisition and control system. Dewesoft provides a range of EtherCAT accessories for interconnection, power supply, and synchronization between Dewesoft EtherCAT data acquisition systems. EtherCAT power injectors, synchronization connectors, and repeaters are essential tools for distributed EtherCAT data … Read more
In-Depth Analysis of FreeRTOS Kernel Source Code: From Task Scheduling to Interrupt Handling Introduction As a representative of embedded real-time operating systems, FreeRTOS has an elegant and efficient kernel implementation. This article will delve into the key implementations of the FreeRTOS kernel, including task scheduling, memory management, interrupt handling, and other core mechanisms. Task Management … Read more
1. Overview of Shared Memory Technology Shared Memory is one of the fastest inter-process communication (IPC) methods in Linux systems, allowing multiple processes to access the same physical memory area, thus avoiding the performance overhead of data copying between processes. Compared to other IPC mechanisms such as pipes and message queues, shared memory has the … Read more