1. Experimental purpose *Master the method of controlling interrupts and timers in C51 *Master the principles and methods of using CH451 for keyboard input *Master the interface and programming of DS18B20 temperature sensor 2. Experimental equipment *MCU experiment box *CH451 display module *Temperature acquisition module (at the lower left of the SWITCH module area of […]
Tag: keyboard
Python win32api.keybd_event simulates keyboard input
win32api.keybd_event The function prototype: keybd_event(bVk, bScan, dwFlags, dwExtraInfo) The first parameter: virtual key code (see the appendix for the keyboard key code comparison table); The second parameter: hardware scan code, generally set to 0; The third parameter: a flag bit for function operation. If the value is KEYEVENTF_EXTENDEDKEY, the key is pressed. It can also […]
Electronic keyboard design based on 51 microcontroller
Electronic keyboard design based on 51 microcontroller (Simulation + Program + Schematic + Design Report) Function introduction Specific functions: 1. Use the eight keys 1, 2, 3, 4, 5, 6, 7, and 8 of the keyboard to produce 8 different tones. 2. There are 3 buttons that can play 3 songs respectively. 3. Song titles […]
Lecture 17 | How to use mouse and keyboard to operate the game?
If a game cannot be operated with the mouse and keyboard, then we can only watch it as an animation. Therefore, in a game, the operation of the mouse and keyboard is essential. Sometimes, the mouse and keyboard must be operated at the same time, such as FPS games, real-time strategy, etc. Mouse and keyboard […]
QT captures keyboard input and displays the input shortcut key combinations, and solves the problem that some key combinations (such as Ctrl+Shift+letters) cannot be recognized in the Linux environment
Recently I am working on a QT project, which requires identifying keyboard input keys to generate shortcut keys. There is a class QKeySequenceEdit in QT. Using this, you can directly obtain keyboard input. However, if you want to filter out the keys you do not want to recognize, you must rewrite it. ThekeyPressEvent(QKeyEvent *e) function. […]
MFC mouse and keyboard programming experiment
Article directory 1.Preliminary knowledge 1.Visual Studio program debugging method 2. Operation steps of MFC message mapping 3. How to handle keyboard and mouse messages in MFC programs Handle mouse messages Handling keyboard messages 2. Experimental purpose 3.Experimental content 4. Code implementation 1.Mouse move message 2. Mouse click message 3. Keyboard press message 4. Print initial […]
c Question 1: Read an integer number from the keyboard, calculate how many digits the number has, and print out the number in each digit.
Read an integer number from the keyboard, count how many digits the number has, and print out the number in each digit. Loop and remainder operator (pow) Because we need to use pow, we need to add #include to introduce the math library. Start writing code #include <stdio.h> int main() { int num, count = […]
HOOK technology (take keyboard hook as an example)
1. Introduction to callback functions If you pass a function pointer (address) as a parameter to another function, and when this pointer is used to call the function it points to, we say it is a callback function. The callback function is not called directly by the implementer of the function, but is called by […]
MFC touch screen virtual numeric keyboard idea
These days, I need to use a touch screen in MFC projects. At the beginning, I originally called an external keyboard, but my superiors were reluctant and had to write a simple numeric keyboard myself. I will post the ideas and code below. You still have to create the keyboard interface yourself. I am posting […]
Windows keyboard and mouse input process
Article directory Windows keyboard and mouse input process 1. RawInputThread 2. xxxProcessKeyEvent 3.gpqForeground 4. Message hook 5. From keystrokes to Win32k 6. Summary Windows keyboard and mouse input process Normally, when we use Windows, we interact with the system through the mouse and keyboard. So how do the keyboard and mouse input and convert various […]