void CTestPmpButtonDlg::OnPaint() { CPaintDC dc(this); // device context for painting RedrawPmpDialog(dc.m_hDC); // Do not call CTestPmpBasicDlg::OnPaint() for painting messages } Above is the backgro...
[i=s]This post was last edited by baqs603 on 2021-8-5 10:32[/i]Recently, when I was learning about the debouncing of mechanical buttons of MSP430, there was a sentence in the book that I didn't quite ...
I wonder if there are any friends who are studying VirutalWiFi. I have a question about the buffer part and would like to ask you. // Send Buffer Data Structures, one for each SSID QUEUE_HEADER SendWa...
[align=left][font=宋体][size=12.0pt][/size][/font][/align][align=left]In common technical materials, some technical specifications state that "unused pins are not allowed to be left floating, and must b...
Hi guys, I am working on a USB host program. The device I am working on has two configurations: 1. USB flash drive, 2. HID+audio. The default configuration is the USB flash drive function. I want to s...
With the promotion of the construction of intelligent communities in the country, anti-theft systems have become essential equipment for intelligent communities. Especially in recent years, the urg...[Details]
1. Overview
Will passive devices
produce nonlinear intermodulation distortion? The answer is yes! Although there is no systematic theoretical analysis, it has been found in engineerin...[Details]
We know that the inverter consists of two parts: the main circuit and the control circuit. Due to the nonlinearity of the main circuit (switching action), the inverter itself is a source of harmoni...[Details]
1 Introduction
Ultrasound refers to elastic vibration with a frequency higher than the audible frequency limit (i.e., in the frequency band above 20 kHz). The propagation process of this vib...[Details]
1 Introduction to LED
With the development of science and technology, people have higher and higher requirements on automobile light sources. LED (Light Emitting Diode) has gradually attracted...[Details]
The most important components of new energy electric vehicles are power batteries, electric motors and energy conversion control systems. The power battery must achieve high performance such as fas...[Details]
Introduction
my country's rapid economic growth is mainly due to the development of manufacturing and the acceleration of urbanization. However, urbanization cannot be achieved at the expense ...[Details]
Traditionally, when using PLC to control stepper motors, a dedicated stepper motor control intelligent module is usually added to the PLC, and then connected to the drive power supply to realize th...[Details]
1. Basic principles of organic/polymer solar cells
The basic principle of organic/polymer solar cells is to use the photovoltaic effect generated by light incident on the heterojunction of sem...[Details]
High specific energy lithium/thionyl chloride (Li/SOCl2) batteries are widely used in multi-functional intelligent meters (such as smart meters, water meters, etc.) as real-time clocks and memory b...[Details]
LED (Light-emitting diode) is widely used in indication, display and other fields due to its advantages such as long life and low energy consumption. Reliability, stability and high light output ar...[Details]
According to a survey by the International Energy Agency, Asia and Australia used 1.65 trillion liters of oil for energy in 2004. The survey also showed that since 1990, the demand for oil has been...[Details]
As the global leader in virtual instrument technology, NI provided customers with more than 6,000,000 virtual instrument measurement devices in 2004 alone. For 25 years, engineers have used virtual...[Details]
Beijing time, July 2 morning news, Google last week released its own brand tablet computer Nexus 7, equipped with its latest operating system Android 4.1 "Jelly Bean". But market research firm Ovum sa...[Details]
What is Power Monitoring Software
Power monitoring software is used in conjunction with an uninterruptible power supply (UPS) to improve its performance. When using an UPS, users can use this ...[Details]
Embedded System
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