Ways of calling a function in c/c++ programming
c In c programming, functions can be invoked in two ways, one is call by value and the other is call by reference. Actual parameters are the variables, const...
Posts by Category
- c/c++ 9
- arduino 5
- linux 4
- gdb 4
- gcc 3
- vim 2
- programming 1
- etc 1
- git 1
- Tips 1
- shell 1
- rdp 1
- tmux 1
- rust 1
c/c++
Ways of using standard input/output in C
c c code This is a C program that inputs one string and two numbers, and outputs the input string and numbers. ```c #include
Race condition
A race condition occurs when two or more threads access a shared resource(such a file or variable) at the same time. In this case, each thread races to read ...
Message Queues
IPC using message queue A message queues is one of IPC mechanism. It provides a way to send and get data between 2 unrelated processes. The 2 processes acces...
function call trace in c program
backtrace functions in c source code When we debugging, we sometimes need to figure out how the function was called. Here, I will describe the c functions th...
c/c++ library on Linux
c shared library source code fourArithmeticOperation.h ```c #ifndef _FOURARITHMETICOPERATION #define _FOURARITHMETICOPERATION
FIFOs / Named pipe
FIFOs / Named pipe FIFOs(it’s called to named pipe) is one of IPC(inter-process communication) way to send/receive data between processes. Especially, it can...
c++ template
c++ template c++ template allows you to declare/implement a generic function/class that has a type parameter T instead of declaring/implementing all function...
C++
c++ #include std::cout과 « 를 이용하여 출력 std::cin과 » 를 이용하여 입력 std::endl 을 이용하여 줄바꿈 새로운 표준 라이브러리를 사용할 경우, #include 를 사용. 과거의 표준 라...
arduino
[Arduino Uno] DC motor control
DC motor A DC motor is a device that converts direct current electrical energe into mechanical energy according to Fleming’s left-hand rule. A DC motor is c...
[Arduino Uno] External interrupt
External interrupt On the Arduino Uno board, digital input pin 2 and 3 can be used as interrupt pins. A interrupt handler for an interrupt can be registered ...
[Arduino Uno] analogRead / analogWrite
analogRead / analogWrite In the Arduino Uno board, there are 6 pins A0 ~ A5 that can read analog input voltages, and their resolution is 10 bits. That is, t...
[Arduino Uno] 7-Segment Display
7 Segment Display 7 segment is a module representing a number in an embedded system. The number is divided into seven segments and represented by one LED per...
[Arduino Uno] 4bits LED binary counter
circuit The circuit below is a 4bits binary counter with 4 red LEDs. The exact characteristics of the LED should be checked in its datasheet. It is assumed ...
linux
How to create files with random data
Using “head” command to generate files create a 100M file filled with all 0’s. 1 $ head -c 100M /dev/zero > 100M_filled_with_zeros create a 100M file fil...
Split compression / decompression
There are several ways to do split compression/decompression. Here I will introduce some methods. In this example, a 100MB file is divided and compressed in...
Gentoo
Gentoo Testing version 설치 하는 방법(패키지별) https://wiki.gentoo.org/wiki/Knowledge_Base:Accepting_a_keyword_for_a_single_package ncurses li...
gentoo linux 에 Jekyll 설치 하기
gentoo linux에서 Jekyll을 설치하는 방법에 대하여 간단히 포스팅한다. Jekyll을 사용하기 위해서는 ruby, bundler, jekyll이 설치되어 있어야 한다. Jekyll은 simple, blog-aware, static site generator tool...
gdb
[Yocto] QEMU kernel debugging with GDB
This is a post about aarch64 kernel debugging using qemu and gdb in yocto environment
[Yocto] Enabling GDB TUI mode
reference https://docs.yoctoproject.org/
Debugging with gdb tui mode
reference https://sourceware.org/gdb/onlinedocs/gdb/TUI.html
How to use eclipse cdt as front end of arm gdb
reference https://wiki.eclipse.org/CDT/StandaloneDebugger
gcc
labels in assembly code
Labels in assembly code
arm gcc assembly in C
arm gcc assembly in C General form of an inline assembler 1 asm(code : output operand list : input operand list : clobber list); Rotating bi...
vim
Settings for analyzing code using gnu global in vim
reference https://www.gnu.org/software/global
vim command
Here I summarized vim commands that are used frequently for development. How to move cursor to the location in history
programming
gtk/gtkmm
How to Compile Gtk 1 $ gcc -o example-2 example-2.c `pkg-config gtk+-3.0 –-cflags –-libs` How to Compile Gtkmm 1 $ g++ -o example-2 exam...
etc
ETC
gcc로 컴파일 할때, -fstack-usage 옵션을 사용하면, function별로 stack 사용량을 .su file에 저장한다. function별로 사용되는 스택을 보여주고, 누적된 것을 보려면, 아래 링크를 참조. https://dzone.com/a...
git
Git
reference https://newbedev.com/setting-up-and-using-meld-as-your-git-difftool-and-mergetool https://kparal.wordpress.com/2020/12/16/show-a-side-by-side-...
Tips
Tips
Tips dokuwiki에서 media manager에서 파일 업로드가 되지 않는 경우, 아래 내용 참고. https://github.com/splitbrain/dokuwiki/issues/1104 dokuwiki table에서 자동변형하...
shell
shell programming
while loop in shell file while_loop.sh ```bash #!/bin/bash
rdp
RDP over ssh
RDP over ssh using reminna After ssh connection in terminal, connect to localhost:59002 in reminna run command in terminal 1 ssh -L 59002:localhost...
tmux
tmux setting
tmux는 하나의 터미널 창에서 여러개의 터미널을 생성하여 사용할 수 있게 해주는 툴이다. tmux는 많은 옵션을 가지고 있는데, 그중 기본적인 사용방법을 아래에 정리하였다.
rust
[Rust] 여러개의 숫자 입력 받기
rust에서 숫자를 입력 받는 동작 하는 몇가지 방법 정리