Bluetooth remote control car based on STM32
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preface
This article introduces the Bluetooth remote control car based on STM32C8T6.
There may be a lot of contents, but it is not hydrology, and the procedure is also explained in det ...
Posted by izbryte on Sat, 16 Apr 2022 11:16:36 +0300
C language -- file operation
1, Opening and closing of files
First, you need to create a file pointer:
FILE* pf;// File pointer variable
Definition PF is a pointer variable pointing to data of type FILE. You can make pf point to the FILE information area of a FILE (which is a structure variable). The FILE can be accessed through the information in the FILE information ...
Posted by _DarkLink_ on Sat, 16 Apr 2022 10:15:43 +0300
MM32F3277 I2C accesses LPS22HH air pressure sensor
Foreword
The wrong sensor was selected this week. The LPS22HB was selected as LPS22HH, and the document was written in vain 😫
Let's have a more CSDN, or we'll lose a lot.
Similarities and differences between LPS22HB and LPS22HH
Let's talk about their similarities and differences first
Same point
The address is the same (so I looked at HH' ...
Posted by tysonrileyreznor on Sat, 16 Apr 2022 09:57:36 +0300
Branch and loop statements (C language)
1.if statement
Syntax structure: If (expression) Statement; If (expression) Statement 1; else Statement 2; //Multi branch If (expression 1) Statement 1; Else if (expression 2) Statement 2; else Statement 3;
#include <stdio.h>
int main()
{
int a = 0;
int b = 2;
if(a == 1)
{
if(b == 2)
{
...
Posted by Tryweryn on Sat, 16 Apr 2022 03:19:49 +0300
First understanding of the idea of partition and rule (notes of runners)
Shuwen's future goal: enter the big factory~ 🤪. Let my family relax and try to make life better, okay! Shu Wen's current situation: big dish chicken, from food to code, has made many learning friends (great) 👍) Blog purpose: writing a blog is to record your learning path It's also to brighten the interviewer's eyes, and then pretend to b ...
Posted by califdon on Sat, 16 Apr 2022 01:35:25 +0300
Dynamic memory management ---- malloc, free, calloc, realloc; Common dynamic memory errors
catalogue
1, malloc
2, free
3, calloc
4, realloc
Required header file: include < stdlib h>
1, malloc, free
Function: void* malloc (size_t size);
Introduction: this function applies for a continuously available space from memory and returns a pointer to this space. If the development is successful, it returns a pointer to the deve ...
Posted by gmcalp on Fri, 15 Apr 2022 18:33:28 +0300
C language - array exercises
Topic 1: diagonal elements and
Find the sum of diagonal elements of a 3 * 3 integer matrix.
Solution:
For us, when we don't know what diagonal is, we can't find the sum of diagonal elements. Therefore, to make the computer calculate, you have to tell the computer which elements are diagonal elements. Here we need to give a feature to ...
Posted by Holoverse on Fri, 15 Apr 2022 10:53:41 +0300
[Leetcode] 2 questions: thoroughly understand stacks and queues
preface 🎬
OK, I specifically learned the knowledge of stack and queue. Then the main content of this blog is to do three OJ questions. After learning, we must brush the questions in time to deepen our understanding and consolidation. Otherwise, it is difficult to make progress, which is conducive to our better learning of stack and queue of ...
Posted by PHP_TRY_HARD on Fri, 15 Apr 2022 03:00:49 +0300
Preprocessing and function types
1, Macro definition
1.1 macro definition without parameters
#define PI 3.14159
It is generally expressed in uppercase letters to distinguish it from variable names
#define SIDE 5
#define PERIMETER 4 * SIDE
#define AREA SIDE * SIDE
#define STAND "you are girl"
printf(STAND);
Note:
If there is a macro name in the string, it will n ...
Posted by aouriques on Thu, 14 Apr 2022 23:19:09 +0300
Discuss the timeout problem of the contact algorithm on LeetCode
Some students may not have a concept of the speed of the computer, but feel that the computer should run very fast. Then why do they timeout when doing algorithm problems on LeetCode?
How many operations can a computer 1s perform? Next, let's explore this problem.
1. Reasons for timeout
Everyone should have encountered an error when pra ...
Posted by kol090 on Wed, 13 Apr 2022 08:51:51 +0300