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[Reprint] Stepper Motor principle Introduction and STM32-based SPWM Drive stepper motor, the use of software to achieve motor segmentation

Article excerpt from: http://bbs.eeworld.com.cn/thread-370591-1-1.htmlI. Structure and driving principle of hybrid stepping motorThe principle of the motor this part does not want to talk about too complicated, open a motor to see the

The realization of gray code

problem: Generate all gray codes for n-bits.  Gray Code is a collection of numbers, each of which is represented by a binary, assuming that an n-bit is used to represent each number, and that only one bit value is different between any two numbers.

Getting Started with Java 2---variables, data types and operators

1. Variables: Variables are a basic unit for storing data, and different variables are independent of each other.2.Java Data type:1) Boolean type:Boolean: Boolean, 8-bit, numeric range: True,false2) Character type:Char: Character type, 16-bit, range

Thread pool life cycle and rejection policy

Threads have 5 states: new State , ready state , running state , blocking state , dead state . The thread pool also has 5 states; However, threads are different from threads, and the 5 states of the line pool are:RUNNING, SHUTDOWN, STOP, tidying,

Java recursive implementation of gray Code (grey code) __java

Problem: All gray codes that produce n bits. Gray code is a collection of numbers, each of which is represented by a binary, assuming that an n-bit is used to represent each number, and that there is only one bit difference between any two numbers.

Jiurl document-linux virtual memory and paging mechanism (x86-64 bit) (i)

JiurlDate: October 30, 2015Paging mechanismLinux (X64CPU) uses virtual memory based on the paging mechanism. Each process has a 256TB (48-bit) virtual address space. Based on the paging mechanism, some parts of the 256TB address space are mapped to

CCNA Study Notes 4 --- vro Startup Process and register value

CCNA Study Notes 4 --- vro Startup Process and register value◆ Role of the vro register value (after understanding, used to adjust the optimization of the vro switch work) power-on self-check (post) load and run boot guide microcode to search for

Winspy the Windows APIs involved

Winspy the Windows APIs involvedWinspy is an open source project that mimics Microsoft Spy + +, but it only covers the window handles of Spy + +, window properties, styles, class name child windows, process thread information, and so on. While not

Wait function return value summary

Before studying the wait and WAITPID functions, I was puzzled by the use of macro wifexited to check the resulting process termination state: Typically we exit by calling the exit or _exit function in the program. So the terminating state of the

Gold even score "large number"

Golden Divide number 0.61803 ... is an irrational number, this constant is very important and will arise in many engineering problems. Sometimes it takes a lot of precision to figure this out.For some precision engineering, the precision of a

Implement parity in C # (1)

Recently, I have been working on Communication Protocol definition and need to use parity bit. I have studied parity and found that there is very little information about C #. I wrote one based on the principle and I will share it with you.  

TCP/IP packet structure

[Keywords] TCP/IP packet structure explanation network protocol In general, we only need to call some encapsulated functions or components for network programming to complete most of the work. However, in some special cases, we need to have a deep

[Reveal the Intel module of vc crt library]-strlen

Since it is the first article after the opening, Let's first look at a simple and practical function to enhance your confidence and then step by step to the complexity, it's easy to let it go. I still remember that when I was a beginner in C, I had

Chinese character storage format in SIM card

Ucs2 format in SIM card The text in the SIM card is stored in the ucs2 format. ucs2 and Unicode are only in different byte order, Unicode is a small header, and ucs2 is a big header. The widechartomultibyte and multibytetowidechar functions in VC

An example of cardinal order in Python algorithm learning _python

The cardinality sort method is also called the Bucket method (bucket sort) or bin sort, as the name suggests, it is through some of the key value of the information, the elements will be sorted to some "bucket" to achieve the role of sorting, the

Value macros for high and low characters

I. Definition In VC6.0 's Microsoft Visual studio/vc98/include/windef.h, the Byte,word,dword is defined typedef unsigned long DWORD; typedef unsigned char BYTE; typedef unsigned short WORD; In Visual C + + 6.0, the char length is 1 bytes, the short

Windows modifies PC properties (ii)

I. Show the self-styled screen saver screen1. Bubble Screen ProtectionOpen the computer, press the Start button, click Run input regedit press ENTER to enter the registry interface, find the following path:

Check whether the Code has the Integer Operation Security Vulnerability.

CheckCodeInteger Operation Security Vulnerability Abstract: Michael Howard raised the question about the Integer Operation Security Vulnerability and elaborated that it can be used to protect its own applications.ProgramSecurity Plan. Many years

Windows Memory Management Mechanism and C ++ memory allocation instance (I): process space

Background: In programming, many windows or C ++ memory functions do not know the difference, let alone effective use. The root cause is that they do not have a clear understanding of the memory management mechanism of the operating system, this

MoV MVN range Problems

It took a long time to read sections 5 and 6, but I did not know much about it. However, I still feel that I have learned a lot about it. Summary: 1. mov/MVN Some 32-bit values in a specific range can be directly loaded into the register. These

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