The poll() system call is System V's I/O multiplexing solution. It solves some of the deficiencies of select(). #include
int poll(struct pollfd *fds,nfds_t nfds,int timeout); select() uses a solution ...
Wrote an infrared decoding program, using flag as a mark to return to the main program for processing void int0_isr() { unsigned char i,j,n; GICR&=~BIT(6);//Turn off INT0 interrupt Delayus(7950);//The...
1 IntroductionThe frequency divider is the basic unit in the phase-locked loop circuit and is the unit circuit that works at the highest frequency in the phase-locked loop. Traditional frequency divid...
Hello everyone! I want to use the LT3480 switching regulator, with an input of 25V, an output of 3.3V, and an output current of 0.3A. I checked the table (efficiency vs. load current) and found that t...
With its sports car looks, airline-like instrument panel display and quiet, smooth start, it's no surprise that the Toyota Prius gasoline/electric hybrid is the fastest-selling vehicle in its class. (...
I use the functions in the math library. When the program code is small, it runs normally.However, if the program code is large, such as 0x2000, calling the functions in the math librarywill cause the...
In public places such as schools, government agencies, factories and mines, as well as public corridors in residential areas, the phenomenon of long-burning lights is very common, which causes a h...[Details]
As cellular phones become more advanced, the power consumption of the system during operation and the power consumption during standby are also increasing. Therefore, the power management design of...[Details]
1. With the development of modern industry and the continuous improvement of automation, some medium and large control systems have been greatly facilitated, which not only makes control easier, bu...[Details]
With the rapid development of intelligent control technology, computers and information technology, the trend of information appliances IA (Information Application), computers and communications integ...[Details]
The potentiometer is an adjustable electronic component. The main functions of the potentiometer in the circuit are as follows:
1. Used as a voltage divider
A potentiometer is a continuou...[Details]
Since the late 1990s, with the demand for higher system efficiency and lower power consumption, the technological update of telecommunications and data communication equipment has promoted the deve...[Details]
Analysis of the three core aspects of digital TV transmission standards
According to the differences in regionality, transmission method and modulation method, the transmission method needs to...[Details]
Rated capacity refers to the maximum output power of the UPS (the product of voltage V and current A).
Usually, the UPS power supplies sold on the market are marked with "W" (watt) for smaller...[Details]
With the popularity of digital appliances, rechargeable batteries can be seen everywhere in people's daily lives and have become one of the indispensable daily necessities.
This article gives ...[Details]
0 Introduction
In the design and construction of communication systems,
communication power supply
is called the heart of the communication system. The power supply system will dire...[Details]
1. Introduction
Modern modular machine tools are equipped with a large number of electronic devices to meet the requirements of processing accuracy, processing speed, etc. If the conventional ...[Details]
0 Introduction
PROFIBUS is an open digital communication system with a wide range of applications, which has been included in the international standards IEC 61158 and IEC 61784. Since the gen...[Details]
Various electronic and electromagnetic interference inside and outside the car often puts automotive electronic equipment in dangerous working conditions, degrading the performance of electronic eq...[Details]
0 Introduction
This paper designs a dot matrix LED text display screen that is easy to update, expandable, and low-cost. The ways to reduce costs are: ① Use the Bluetooth data transmission...[Details]
With the rapid development of information technology represented by computers, semi-physical simulation technology plays an important role in many military and civilian fields such as aerospace and co...[Details]
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