Mathieu CAROFF mathieucaroff

Using a raspberryPi 3 as wifi router

... with raspbian OS

Written after trying a number of other techniques which failed. (2018-08-31)

By default, because of a bug, Network-Manager doesn't manage wifi. It can be worked around though.

Output can be text or png (png requires graphviz). Can produce regular binary Collatz tree or Collatz-like trees without even numbers.

git config --global user.name "Mathieu CAROFF"
git config --global user.email "[email protected]"

	# Collatz tree generator. Output as text or png (png requires graphviz).
	# Produces regular binary collatz tree or trees without even numbers.
	#
	# Note: The tree starts at 8 to avoid the 4-2-1 loop.
	# Note': See the end of the file for two example text trees.
	#
	# Setup - on linux or wsl:
	# ```shell
	# sudo apt install python3-pip ipython3 graphviz
	# sudo -H pip3 install anytree

	#!/bin/sh
	#
	# download-buidl-and-install-ghdl.sh
	#
	# It took about 5 minutes on my laptop (2018-09-28).

	sudo apt update
	sudo apt install -y git make gnat zlib1g-dev
	git clone https://github.com/ghdl/ghdl
	cd ghdl

	key::::00000000000000000000000000000000

	block::00000000000000000000000000000000
	crypt::66e94bd4ef8a2c3b884cfa59ca342b2e

	block::ffffffffffffffffffffffffffffffff
	crypt::3f5b8cc9ea855a0afa7347d23e8d664e

	block::0000000000000000ffffffffffffffff
	crypt::747cb9267e59fa9e4e615668db0909bc

	#!/usr/bin/env python3
	#
	# Fill a circle with 0 and 1's
	# The circle is made of half as many lines as it is made of columns.
	# This way, it usually appears round (with most terminal fonts at least).
	# Accept the circle's width-radius as argument. See the default radius r, below.

	r = 15
	from sys import argv
	if len(argv) > 1:

	#!/bin/bash

	# test-shell-default-variables.sh

	# Usage examples (you might want to `sudo apt install zsh ksh`):
	#
	# ./test-shell-default-variables.sh dash bash
	# ./test-shell-default-variables.sh dash bash zsh ksh
	# ./test-shell-default-variables.sh dash bash zsh ksh \| less -R

	# stackoverflow.com/q/3485475/can-i-create-a-view-on-a-python-list

	# This solution is based on python 3 range ability to be sliced and indexed
	# in constant time.
	#
	# It supports slicing, equality comparsion, string casting, and reproducers,
	# but doesn't support assigment (and I don't plan to add support for it).
	#
	# Creating a SliceableSequenceView of a SliceableSequenceView won't slow down
	# access times as this case is detected.

	-- Mathieu CAROFF
	-- 2018-11-20
	-- util_str.vhd
	-- Utilitary functions to convert std_logic_vector(s) to strings

	-- Test:
	-- ```bash
	-- ghdl -a util_str.vhd
	-- ghdl -r util_str_tb
	-- ```