Memory-Mapped File Operations in C Language A memory-mapped file is a technique that maps the contents of a file directly into the process’s address space. This allows the program to access file data as if it were accessing memory, thereby improving I/O efficiency. In C language, we can use the mmap function to perform memory-mapped … Read more
An embedded Linux system can typically be divided into four layers from a software perspective:1. Boot Loader.It includes the boot code (optional) embedded in the firmware and the Boot Loader itself.2. Linux Kernel.A customized kernel specific to the embedded board and the kernel’s boot parameters.3. File System.Including the root file system and file systems built … Read more
Source: MCU Fun ID: mcu168 An embedded Linux system can typically be divided into four layers from a software perspective: 1. Boot Loader. This includes the boot code embedded in firmware (optional) and the Boot Loader itself. 2. Linux Kernel. A customized kernel specific to the embedded board along with kernel boot parameters. 3. File … Read more
An embedded Linux system can typically be divided into four layers from a software perspective:1. Boot Loader. This includes the boot code (optional) embedded in firmware and the Boot Loader itself.2. Linux Kernel. A customized kernel specific to the embedded board along with kernel boot parameters.3. File System. This includes the root file system and … Read more
Follow+Star PublicAccount to not miss exciting content Direct Source | Renesas Embedded Encyclopedia The biggest feature of using C language in embedded systems is the ability to directly manipulate registers, which is highly efficient.This article will discuss how to operate registers using C language in conjunction with the Renesas RA6M5 microcontroller. 1 Memory Mapping Before … Read more
1. Memory Mapping In the memory mapping diagram of the STM32F429 chip, it can be seen that the peripherals are allocated 512M of space; however, the actual peripherals do not utilize the entire 512M of memory. When operating peripherals, it is sufficient to manipulate their corresponding memory addresses. For more detailed peripheral memory addresses, refer … Read more
PLC Data Mapping: Memory Mapping Configuration Techniques for Efficient Communication Data Processing! Introduction **Hello everyone!** Today, I want to share a secret that can significantly boost the efficiency of PLC communication—memory mapping configuration techniques. Don’t be intimidated by this technical term, I will explain this powerful feature in the simplest way possible. **Mastering this method … Read more
The bit-banding operation of the STM32 microcontroller is a special memory mapping technique that allows developers to perform atomic read and write operations on specific memory bits, thereby improving the efficiency of operations on GPIO ports, registers, and individual bits of other peripherals. 1. Bit-Band Region and Bit-Band Alias Region The memory space of the … Read more
Reading files is an essential operation and a necessary skill to master in our daily development. How to read files, how to write files, how to close connections after writing files, how to create files, and so on. Reading Files and Iterating Through Their Lines When we need to read a file line by line … Read more
1. Introduction In computer operating systems, disk I/O (Input/Output) is a key link in data read and write operations. For Linux systems, optimizing disk I/O performance is directly related to the overall response speed and data processing capability of the system. This article will detail the read and write process of Linux disk I/O, including … Read more