Last night, a student studying abroad asked me about embedded systems. At first, I thought it was a technical exchange, but then he sent me a copy of past exam questions 😂. Upon reviewing, it mainly covered some basic theoretical analyses of real-time systems and some understanding of multitasking code. The main focus was on … Read more
The establishment of a TCP connection can be simply referred to as a three-way handshake, while the termination of the connection can be called a four-way handshake. TCP is a connection-oriented protocol, so both parties need to establish a connection before sending data. This is completely different from the protocols discussed earlier. All the previous … Read more
It is often said that an operating system (OS) is one of the three great romances for programmers. We frequently use terms like “soul, brain, kernel, foundation” to describe it, highlighting its significance in the realm of computing. In practical work, this is indeed the case; many of the troubleshooting issues we encounter are closely … Read more
1. Principle of Short Circuit Isolators The short circuit isolator is a device used in the transmission bus of fire alarm systems that isolates the branch line during a short circuit. It automatically makes the two ends of the short circuit section high resistance or open circuit, preventing damage to the controller and not affecting … Read more
Click Above↑ “Old Wang Talks to You”ElectricalI The bus short-circuit isolator is mainly used to isolate components on the bus, isolating fire detectors, combustible gas detectors, manual alarm buttons, and sound and light alarms in a specific area or segment, to avoid affecting the reliable operation of the system in areas that are not isolated. … Read more
Click AboveElectricalI 1 Analysis of Bus Short-Circuit Isolator Settings 1.1 Significance of Bus Short-Circuit Isolator Settings When a short circuit occurs in the fire alarm system’s bus circuit, the fault circuit will pull down the voltage of the entire fire alarm system, leading to system paralysis and failure. To prevent this situation, the “Specification” requires … Read more
Click the above↑ “Lao Wang Talks to You AboutElectrical” FollowMe 1. System Selection and Architecture Depending on the scale and layout of the venue, consider adopting a bus-based, distributed, or a combination of bus-based and distributed emergency broadcasting system architecture to fully leverage the advantages of both, meet the broadcasting needs of different areas, and … Read more
Click “Read Original” to view Liangxu’s original video. Author: Sanhua Source: Official Account “Alibaba Cloud Native” Introduction: The value of technical communication is not only reflected in shortening our application development path through commercial products and open-source projects, accelerating business launch rates, but also in sharing experiences from excellent engineers in improving work efficiency, optimizing … Read more
1. Exam Requirements: (1) Master the basic knowledge of computer science; (2) Master the hardware and software knowledge of embedded systems; (3) Master the methods of embedded system analysis; (4) Master the methods and steps of embedded system design and development; (5) Master the methods of embedded system implementation; (6) Master the knowledge of embedded … Read more