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As an important element of struct file_operations, mmap mainly implements the mapping relationship between physical memory and virtual memory, so that virtual memory can be directly accessed without u...[Details]
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Shanghai, China, November 6, 2024 - amsram (SIX Swiss Exchange stock code: AMS), a leading global supplier of optical solutions, held the amsram China Development Center (CDC) roundtable forum at t...[Details]
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Practical experience at home and abroad has proved that solving urban traffic problems cannot rely solely on building road infrastructure, and intelligent transportation systems (ITS) are the most ...[Details]
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Concept of three-phase motor
A three-phase motor is an electric motor that uses an AC power supply to rotate. It is powered alternately by three sets of orthogonal power supplies to drive the ...[Details]
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On a general oscilloscope probe (similar to the probe of a multimeter), there is a small switch for selecting between ×1 and ×10. When ×1 is selected, the signal enters the oscilloscope without atten...[Details]
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A rotary encoder is a photoelectric rotary measuring device that directly converts the measured angular displacement into a digital signal (high-speed pulse signal). It is mainly used in machine to...[Details]
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In order to ensure the stability and reliability of medical devices, the State Council of the People's Republic of China issued Order No. 276 that medical device production must meet strict productio...[Details]
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With the development of digital imaging technology, cameras as a sensor have been widely studied. In the past year or so, ToF technology has frequently appeared on various mobile phone products as a ...[Details]
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Intelligent manufacturing has gradually developed with the continuous popularization of information technology. In 1988, Professor PK Wright of New York University and Professor DABourne of Carneg...[Details]
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LED luminous characters are luminous characters made with light-emitting diodes as light sources. LEDs can save a lot of electricity for the country and users, and save a lot of work hours for cont...[Details]
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Hardware: STC89C52RC Development tool: Keil uVision4 Preface: 8051 is a very classic and long-standing single-chip microcomputer. As an entry-level single-chip microcomputer, 8051 is popular among ma...[Details]
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Following the release of the industry's first 138-inch Micro LED ultra-high-definition private giant-screen cinema product by Leman Optoelectronics on September 27, 2021, Leman Optoelectronics announ...[Details]
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1 Introduction
In recent years, coins, especially banknotes, have been robbed continuously, which has seriously affected social security and caused serious economic losses to banks. If the rob...[Details]
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Huawei has officially released the P40 series of mobile phones, including the Huawei P40 Pro+, which has also been officially launched recently. Blogger @长安数码君 also disassembled the Huawei P40...[Details]
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I have been engaged in embedded system development for many years. In terms of software, I have accumulated a lot of experience, from the initial single-chip assembly language programming to the later...[Details]
Analog electronics
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