In practical engineering, we often hear Alarm Alarm Alarm; for example, a watchdog timeout triggered an Alarm, or PLL anomalies triggered an Alarm… Why do we need these Alarms? Who manages these Alarms? When an Alarm occurs, how should it be handled? With these questions in mind, this article discusses the core component of the … Read more
（Image from Wikipedia entry Caerlaverock Castle: https://en.wikipedia.org/wiki/Caerlaverock_Castle ） In the previous article, we introduced the difference between the two concepts of “security” in Chinese, namely Security and Safety, in embedded systems—Safety is generally understood as “functional safety,” while Security refers to “information security”—to distinguish it from the more familiar “cyber information security.” In the following … Read more
Background Read the fucking source code! –By Lu Xun A picture is worth a thousand words. –By Gorky Note: Kernel version: 4.14 ARM64 processor, Cortex-A53, dual-core Tools used: Source Insight 3.5, Visio 1. Overview In the Linux kernel, real-time processes always have a higher priority than ordinary processes. The scheduling of real-time processes is managed … Read more
Low-power mechanisms are crucial for processors. This article provides an overview of low-power technologies for processors. For processors, while we pay great attention to their clock frequency and performance, one undeniable fact is that processors spend the vast majority of their time in standby or sleep mode. For example, the smartphones we use daily are … Read more
ET-UARTSWD: An Efficient Tool for Motor and Power Circuit Development In the process of electronic engineering R&D, the quality of debugging tools directly affects project progress and product quality. From the physical image, we can see that ET-UARTSWD, as a debugging tool specifically designed for engineers, is not only made with high-quality materials in hardware … Read more
If you don’t want to miss my updates, remember to check the public account in the upper right corner and set it as a star, giving me a star in return. Based on the Cortex-M core, the mainstream download interfaces are JTAG and SWD. Differences Between SWD and JTAG Pins: JTAG: TDI: Test Data In. … Read more
Source: IoT Media Author: Feiniaohuang For secondary reprints, please contact the original author Introduction Arm, a British company founded in 1978, developed through a chip IP licensing business model, thrived due to the growing demand for smartphones, and entered a new phase of development after being fully acquired by Masayoshi Son. No one would have … Read more
The rise of microcontrollers (MCUs) began in the 1970s in Europe and America, and the 8051 MCU was introduced in 1981. It has been 36 years since then. In terms of quantity, 8-bit MCUs remain the backbone of the MCU market, and many companies continue to design and produce MCUs based on the 8051 core. … Read more
Microcontrollers (MCUs) are widely used across various industries, such as home appliances, industrial automation, real-time control, and data collection. To meet the demands for real-time control and quick responses in industrial control, most MCUs are equipped with Real-Time Operating Systems (RTOS). With the rise of the Internet of Things (IoT), the software industry has also … Read more
As early as 1982, a group of students from Carnegie Mellon University developed a networked soda machine that could inform users about the stock of drinks in the fridge and whether newly added drinks were cold. This machine is considered the first networked appliance. These students did not realize that their actions would make them … Read more