globalmem Looking at Linux device driver development details, the chapter on character device drivers provides test code and application programs that are very helpful for beginners. The reason for writing this article is that I noticed I had not yet written about character devices, despite having previously published articles. As for the role of the … Read more
1. Driver Development: Errors Shadow Us In the field of C++ device driver development, error handling and exception management are like a hidden “shadow” that constantly affects the quality and stability of the driver program. When we eagerly expect the device to run smoothly, but encounter issues like the device not being recognized or data … Read more
1. Interrupts: The “Emergency Contact” Between Devices and Processors In the complex operation of computer systems, interrupts are a crucial technology. Simply put, an interrupt is when the computer pauses the currently running program to execute a related service program upon encountering an urgent event that needs to be processed. Once completed, it automatically returns … Read more
Device Driver – The “Translator” Between Hardware and Software In the world of computers, hardware is like human limbs, responsible for executing various specific tasks; software acts like the human brain, issuing commands and processing data. The device driver is the crucial bridge connecting hardware and the operating system, playing an essential “translating” role. Whenever … Read more
The demand for device driver models includes the bus, device, and driver models. If we compare their relationships to examples in everyday life, it becomes easier to understand. For instance, a charging wall socket quietly embedded in the wall can fulfill its mission of charging, regardless of whether the device is a computer or a … Read more
Background and Overview Sensor is an important part of the Internet of Things (IoT), “Sensors to IoT” is equivalent to “eyes to humans.” Without eyes, humans cannot see this vast world, and without sensors, IoT cannot perceive the ever-changing world. Currently, there are many sensors developed for IoT, including Accelerometers, Magnetometers, Gyroscopes, Ambient Light Sensors, … Read more
1 Overview The QNX operating system is an embedded hard real-time operating system launched by QNX, a subsidiary of BlackBerry in Canada, and belongs to the UNIX-like operating systems. The operation method of the Shell command line and the commands are almost the same as those in the Linux system. The QNX operating system follows … Read more
1. Introduction: The Magical Journey of Bluetooth Begins Here In today’s rapidly advancing technological era, Bluetooth technology acts like a magical “invisible link,” quietly and omnipresently integrating into every corner of our lives. When you put on your Bluetooth headset in the morning, kicking off a vibrant day with dynamic music, behind that smooth audio … Read more
Windows 10 device drivers are essential software components that allow devices to interact with the Windows operating system. It is the drivers that enable communication between the Windows operating system and specific hardware, such as network cards, hard drives, audio input and output, and graphics cards. They also detect peripheral devices, including keyboards, mice, printers, … Read more
In embedded system development, developing device drivers is a crucial task. As a bridge connecting hardware and software, the quality of device drivers directly impacts the correctness of system functionality and operational stability. In the rapidly evolving open-source ecosystem, Zephyr RTOS is favored by developers for its lightweight, modular, and highly scalable nature. However, in … Read more