Work Mode Thread mode: This mode is active when the processor is reset or exits from an exception. Code in this mode can be either privileged or user code, controlled by CONTROL[0]. Handler mode: This mode is entered when an exception (including interrupts) occurs, with all code having privileged access. Code Privileges Privileged access: Full … Read more
Bit-banding operations may not be used as much now, but in the past, when MCU performance was not very good, bit-banding operations were a common operation among many software engineers. This article mainly discusses the Cortex-M3 core (STM32F1), and I believe many friends have been confused when they first learned about it. 1About Bit-Banding Operations … Read more
Which is more powerful, Arduino or STM32? Many electronics enthusiasts face a dilemma when choosing between Arduino and STM32, unsure of which to use. Arduino has always been popular, but STM32 has more interfaces, stronger performance, and faster speeds? Features of Arduino and STM32 Arduino: Arduino leans towards creativity, simplifying hardware operations. Its functions and … Read more
First, let me clarify that MPU has many meanings, and there are two common ones: MPU:Memory Protection Unit; MPU:Microprocessor Unit; Additionally, some may associate it with modules like MPU-6050. So, please do not confuse MPU. Why Use MPU? If you develop embedded projects that suffer significant economic losses or major accidents due to memory overflow … Read more
In business, “must” represents the minimum requirements for market participation. Today, there are over a hundred open-source and commercial RTOS in the embedded market, most of which lack functional safety certification. Given this, it is clear that RTOS functional safety certification is not yet a “must” today, but perhaps it should be. RTOS is the … Read more
32-bit ARM Cortex-M microcontrollers are widely used in various embedded systems and applications due to their low power consumption, high performance, and multifunctional features. These microcontrollers are utilized across a wide range of industries and applications. Here are some common applications of 32-bit ARM Cortex-M microcontrollers: Internet of Things (IoT) Devices: IoT sensors and nodes … Read more
1、reboot means to restart. 2、source makes the modified files take effect immediately, avoiding the problem of having to restart for the changes to take effect. For example, if we modify /etc/profile, the changes will not take effect immediately. In this case, we can enter source /etc/profile to apply the changes. There will be more updates … Read more
Follow+Star PublicNumber, don’t miss the wonderful content Author | strongerHuang WeChat Public Account | Embedded Column Some readers might ask: Can FreeRTOS create tasks and delete tasks? Is it dynamically allocated memory? xTaskCreate(LED_Task, "LED_Task", 128, NULL, 6, NULL); If we want to elaborate on this question, there are many related knowledge points involved. Below are … Read more
3.3.1 Bluetooth Command Settings Knowledge The embedded Bluetooth serial communication module allows us to break free from the constraints of cables and achieve wireless serial communication within a limited range, with two working modes: command response mode and automatic connection mode. In automatic connection mode, the module can be divided into three roles: Master, Slave, … Read more
关注+星标公众号，不错过精彩内容 作者 | strongerHuang 公众号 | strongerHuang Many embedded developers have such doubts: What is the difference between RTOS and Linux? RTOS: Real-Time Operating System, refers to an operating system that can accept and process external events or data at a fast enough speed when they occur, and the results of the processing can control … Read more