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Lincoln Wallace locnnil

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  • Minas Gerais State, Brazil
  • 12:36 (UTC -03:00)
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locnnil / gist:67b2d293d1203f38f1e2ea43a1195169
Created September 9, 2021 02:26 — forked from rxaviers/gist:7360908
Complete list of github markdown emoji markup

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@locnnil
locnnil / CRC.md
Last active February 9, 2022 12:17
Necessary CRC type

Calculate the necessary CRC type

Beeing B the number of bytes of your message the necessary numbers necessary in your CRC gonna be:

N >= ln(8*B+1)/ln(2) -1

This formula cames from the manipulation of the formula B = (2**(N+1) -1)/8

OBS: rembering that only exists CRC8, CRC16 and CRC32 (until now)

@locnnil
locnnil / .gitignore
Created February 14, 2022 00:30 — forked from Yousha/.gitignore
.gitignore for C/C++ developers.
cmake-3.19.4/*
##### Windows
# Windows thumbnail cache files
Thumbs.db
Thumbs.db:encryptable
ehthumbs.db
ehthumbs_vista.db
# Dump file
*.stackdump
@locnnil
locnnil / size_of_array_C.md
Last active February 16, 2022 13:42
Define the size of an array in C

The size of a Array in C

  • Using sizeof:
int a[17];
size_t n = sizeof(a) / sizeof(a[0]);
  • Using a Macro function
#define NELEMS(x) (sizeof(x) / sizeof((x)[0]))
@locnnil
locnnil / toolchain-arm-linux-gnueabi.cmake
Created October 10, 2022 18:12
Cmake Toolchain for ARMv7l architecture
# CMake toolchain file for building ARM software on OI environment
# Processor
SET(CMAKE_SYSTEM_PROCESSOR arm)
# this one is important
SET(CMAKE_SYSTEM_NAME Linux)
#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)
# (OPTIONAL) specify some CPU flags
@locnnil
locnnil / CMakeLists.txt
Created October 21, 2022 02:21
A basic CMakeLists.txt template
cmake_minimum_required(VERSION 3.22)
SET(CMAKE_C_STANDARD 11)
SET(CMAKE_CXX_STANDARD 20)
project(template)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused-variable -Werror -Wfatal-errors ")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-unused-variable -Werror -Wfatal-errors")
@locnnil
locnnil / README.md
Created November 10, 2022 20:18 — forked from Anubisss/README.md
How to compile statically linked OpenVPN client for ARMv5

How to compile statically linked OpenVPN client for ARMv5

You need to install ARMv5 gcc cross compiler: apt-get install gcc-arm-linux-gnueabi

You have to define a directory (via --prefix) where all of your binaries will be installed (copied). In the guide I use the following: /home/user/vpn_compile

OpenSSL

  1. Download the source: wget https://www.openssl.org/source/openssl-1.0.2j.tar.gz
@locnnil
locnnil / boot_log_zte_zxhn_f660.md
Created July 9, 2023 17:24
Boot log of ZTE ZXHN F660 router
BOOT MODE: NAND
ddr init

U-Boot 2013.04 (Oct 11 2016 - 11:22:42)

CPU:   Cortex-A9 400 MHz
AHB:   100 MHz
APB:   50 MHz
@locnnil
locnnil / oneshot_install_docker.sh
Last active July 19, 2023 23:45
Install docker on server
#!/bin/bash
## This is a simple script to update
## all packages of a server and
## install docker all in one shot.
## Enjoy! :D
sudo apt-get update && sudo apt-get upgrade -y
for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done
@locnnil
locnnil / go_updater.sh
Last active July 21, 2023 18:19
Golang updater
#!/bin/bash
set -e
help() {
echo -e "${COLOR['RED']}Usage: sudo $(basename "$0") <go version> <arch> ${COLOR['END']}"
echo -e "${COLOR['RED']}Options: ${COLOR['END']}"
echo -e "${COLOR['RED']} <go version>, The version of GO in format: MAJOR.MINOR.PATCH.${COLOR['END']}"
echo -e "${COLOR['RED']} example: sudo $(basename "$0") 1.20.6 ${COLOR['END']}"
echo -e "${COLOR['RED']} <arch>, The CPU arch (default amd64) ${COLOR['END']}"