Everyone knows that Arduino and Raspberry Pi are two types of development boards that are quite familiar to electronics and embedded engineers, and they are also boards that many beginners consider. Arduino and Raspberry Pi each have their own positioning, and there is a significant difference in performance. However, recently, Arduino launched the Portenta X8 … Read more
Computer Principles The basic principle of a computer is the stored program and program control. Instructions (called programs) that command the computer on how to operate and raw data must be delivered to the computer’s memory through input devices. Each instruction specifies from which address to fetch data, what operation to perform, and where to … Read more
Background:Some customers have reported that certain Hisense motherboards using H26M62002JPR, H26M51002KPR eMMC chips prompt a timeout error during reading, preventing read/write operations. The analysis indicates that the issue is due to non-standard eMMC. Hardware Support:This version is compatible with previous ones; simply transfer the socket head and 25 chips to the new PCB. Software Support:Versions … 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
Yesterday, a student asked me how to drive the DAC5571. I had a solution written by a teacher on hand, and inspired by it, I wrote a simple module. First, let’s take a look at the DAC5571 manual. It uses SDA and SCL for driving, which is the IIC protocol.The waveforms of SDA and SCL … Read more
It’s common to hear hardware engineers who have been working for a few years complain about their monotonous and uninteresting jobs. They often find themselves repeating various board connections daily, occasionally performing simple debugging without even touching ICs or components like resistors and capacitors. This long-term, tedious, and low-technical work leads many entry-level hardware engineers … Read more
1Introduction Online debugging (OCD, On-Chip Debugging) interfaces provide chip-level control over target devices, serving as a primary means for engineers, researchers, and hackers to extract firmware code or data, modify memory contents, or change device operations. If you are familiar with hardware circuits or embedded systems, you certainly know that JTAG (Joint Test Action Group) … Read more
1. Introduction A friend recently sent me a Hikvision security camera, and today we will take it apart to see what’s inside. 2. Disassembly Step one of disassembly, first observe its shape. PS: Nameplate information Model Power DS-2SCD2612F4 2.8-12mm 12V DC 7.5W MAX / PoE(802.3af) Serial Number Production Date 488915429 11/2014 11 Version V5.2.3_141024 Execution … Read more
1. The Powerful Advantages of C++ in Driver Development 1. The Powerful Advantages of C++ in Driver Development In the field of device driver development, C++ is a “sharp tool.” It combines the features of high-level languages with the ability to approach the hardware layer, providing developers with many conveniences. On one hand, C++ has … Read more
C++ is the “hardcore” force in device driver development 1. C++ Enters Device Driver Development In today’s digital wave, various electronic devices fill our lives, from smartphones and computers to cars and industrial robots, all relying on the silent support of device drivers. C++, as a powerful and widely used programming language, plays a crucial … Read more