Today, we will discuss interrupt handling in ARM Cortex-M. In embedded systems, interrupts are the core mechanism for achieving real-time responses. Imagine if there were no interrupts: • When a button is pressed, the system might be busy with other tasks and miss the response. • Incoming communication data might be lost due to untimely … Read more
Arduino and Photoelectric Sensors: Automatic Counter Design In industrial production, product counting is a fundamental and important process. This article will introduce how to use Arduino and photoelectric sensors to create an automatic counter that achieves the function of automatically counting objects as they pass by. This project is suitable for beginners and helps to … Read more
Learn Assembly Language / Comprehensive Review 3, 5, 7, and 8 are programming question sources. The compulsory exam format at our Nanchang campus consists of 20 points for multiple choice, 30 points for short answers, and 50 points for programming. You can find the PDF version of this article in the group files or database. … Read more
Stage One: Obtaining the Interrupt Number Each CPU has the ability to respond to interrupts. When a CPU responds to an interrupt, it follows the same process. This process is the interrupt service routine provided by the kernel. Upon entering the interrupt service routine, the CPU has automatically disabled interrupt responses on that CPU, as … Read more
Abstract：We encounter many operating systems, such as Windows, Android, iOS, and Linux, which are all types of operating systems. Microcontrollers also have their own operating systems, known as real-time operating systems. So what are the differences between these real-time operating systems and the systems we use? The operating systems we commonly use are actually non-real-time … Read more
As a core component of embedded systems, the presence of the ARM processor ensures the stability and performance of the system. To better ensure the normal operation of embedded systems, the ARM processor provides seven operating modes, each with its specific application scenarios and privilege levels. 1. User Mode (USR) Normal program execution mode. Cannot … Read more
CPU is an important part of digital processing systems. In my view, microcontrollers, microprocessors, and DSPs can all be referred to as CPUs, with their emphasis differing. Specifically, traditional microcontrollers are more focused on embedded computing, such as the commonly used 51, AVR, and ARM chips, which not only contain computational and control functions but … Read more