When configuring peripheral interrupt priorities under RT-Thread (including Nano), the core idea is: First, let the RTOS layer take over the NVIC (set grouping and maximum preemption level); Then, let the driver layer assign specific priorities to peripherals in a “high to low” manner; All ISRs must call <span>rt_interrupt_enter/leave</span> to inform the kernel; High real-time … Read more
When it comes to critical sections in FreeRTOS, there are several questions that need to be addressed:1. How is the protection of critical sections implemented?2. What is the relationship with interrupt priority?3. Will masking interrupts affect the operating system’s tick timing and cause a temporary loss of the system clock?With these questions in mind, let’s … Read more
Click the blue text above to follow us Embedded Training – Choose Jufeng Smart Link STM32 interrupt priority mechanism is a concept that often confuses beginners and newcomers to projects. What is preemption? What is response priority? What is the purpose of priority grouping? Why does the priority you set not take effect at all?Don’t … Read more
Intermediate PLC Programming: Interrupt Priority Design for Timely Response to Critical Tasks! Introduction Hello everyone! Today I want to share a magical technique that can make your PLC program “perceptive” — interrupt priority design. Don’t worry about the technical jargon; I will explain this seemingly profound concept in the most relatable way. By mastering this … Read more
This article is from CSDN Blog on FreeRTOS Basics, and it mainly shares important considerations for using FreeRTOS with Cortex-M. Original link: https://blog.csdn.net/zhzht19861011/article/details/50135449 Before reading this article, you must understand the meanings of two macros defined in FreeRTOSConfig.h. The article “FreeRTOS Kernel Configuration Description” explains these two macros: ●configKERNEL_INTERRUPT_PRIORITY ●configMAX_SYSCALL_INTERRUPT_PRIORITY FreeRTOS is a perfect match … Read more
Embedded operating systems sound quite impressive, but in fact, they are just a streamlined version of an operating system, specially tailored for embedded devices. Today, let’s talk about a particularly interesting embedded operating system – the one based on priority cooperative scheduling. It’s a bit like a well-organized small team, where each member has their … Read more
Understanding C++ Operators: Priority, Associativity, and Special Operators 1. Overview Operators in C++ are special symbols used to perform specific operations. Understanding the priority and associativity of operators is crucial for writing correct and efficient code. This article will detail various operators in C++, including their priority, associativity, and some special operators. 2. Operator Priority … Read more
Sitting on the high-speed train from Shanghai to Beijing, the long journey really makes one feel bored (I couldn’t get a direct train, so I can only go slowly, stopping at every station. It’s ridiculous that in the high-speed train era, it still is like this. It reminds me of the time in college when … Read more
Source: WeChat Official Account [Osprey Talks on Microcontrollers] Author: Osprey ID: emOsprey In embedded software development, we inevitably encounter the concept of priority. Mastering the concept of priority is crucial for designing a good software system. The main content of this note includes the following aspects: 1. Interrupt priority 2. Task priority in the operating … Read more
