The SPI (Serial Peripheral Interface) is one of the most widely used synchronous serial communication protocols in embedded systems, playing a crucial role in STM32 development. Compared to I2C and UART, SPI is particularly suitable for high-speed data acquisition, memory expansion, and display driving due to its full-duplex communication, high transmission rates, and hardware slave … Read more
Previous articles mainly focused on the Processing System (PS) of the Zynq SoC, including: Using MIO and EMIO The interrupt structure of Zynq SoC Zynq private timers and watchdogs The triple timer counter (TTC) of Zynq SoC However, from a design perspective, the truly exciting aspect of the Zynq SoC is creating applications that utilize … Read more
Click 👆👆👆 the blue text Follow “Passion Embedded” In embedded development, especially in the development of microcontrollers like STM32, the <span>volatile</span> keyword is a very important concept. 1. Concept of the volatile Keyword <span>volatile</span> is a type modifier in C/C++ that tells the compiler: The variable may be modified unexpectedly (e.g., by hardware, interrupts, or … Read more
Click 👆👆👆 the blue text Follow “Passion Embedded” In embedded development, especially in the development of microcontrollers like STM32, the <span>volatile</span> keyword is a very important concept. 1. Concept of the volatile Keyword <span>volatile</span> is a type modifier in C/C++ that tells the compiler: The variable may be modified unexpectedly (e.g., by hardware, interrupts, or … Read more
In embedded system development, driver design is a key factor affecting system performance, energy efficiency, and maintainability. Below is an in-depth analysis of three mainstream driver design techniques along with practical recommendations: 1. Polling Driver Technical Features: Blocking Design: The main program cannot perform other tasks while waiting for peripheral responses. Simple Implementation: Only requires … Read more
In embedded system development, efficient and reliable communication with peripherals is crucial. The OneWire protocol, with its simple single-wire interface and cost-effectiveness, is widely used for connecting devices such as temperature sensors and iButtons. However, traditional OneWire libraries are often too bulky and resource-intensive. Today, we will delve into a lightweight, high-performance OneWire protocol library—LwOW, … Read more
CPU: STM32F429IGT6 For other STM32 chips or other ARM Cortex-M chips, the solution is generally the same. It is recommended to read this article in full before debugging the issues you encounter. 1. Basic Knowledge In ARM Cortex-M series processors, there are several system exceptions dedicated to fault handling. The faults in CM3 can be … Read more
Efficient UART Reception Programming Example with DMA and IDLE Based on STM32 The goal of this article: A FreeRTOS programming example based on STM32_H5 According to the description in this article, experiments should be able to be conducted on the corresponding hardware, and similar applications can be derived. Prerequisites: Basic knowledge of C language, and … Read more
The STM32 microcontroller, based on the ARM Cortex-M3 architecture, has a complex and efficient internal bus structure that supports the entire system’s data flow and instruction execution, making it a key learning point for many embedded engineers. Below, we will list the main internal buses of the STM32 microcontroller and their functions. 1. I-Code Bus … Read more
With the widespread use of ARM architecture processors in the field of cloud computing, the demand for application developers to be familiar with ARM architecture-related technologies is becoming increasingly urgent. It is well known that providing virtual machine services is a typical application scenario of cloud computing, and the performance of devices within virtual machines … Read more