mathieucaroff

-- 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
-- ```

mathieucaroff

# 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.

mathieucaroff

#!/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

mathieucaroff

#!/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:

mathieucaroff

key::::00000000000000000000000000000000

block::00000000000000000000000000000000
crypt::66e94bd4ef8a2c3b884cfa59ca342b2e

block::ffffffffffffffffffffffffffffffff
crypt::3f5b8cc9ea855a0afa7347d23e8d664e

block::0000000000000000ffffffffffffffff
crypt::747cb9267e59fa9e4e615668db0909bc

mathieucaroff

#!/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

mathieucaroff

# 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

mathieucaroff

Collatz tree generator

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

• Note: The trees start at 8 to avoid the 4-2-1 loop.
• Note': See the end of the file for two example text trees.
• Note": There is a .py version of this gist here: mathieucaroff/collatz-tree.py.

Setup for linux or wsl

mathieucaroff

Using a raspberryPi 3 as wifi router

... with raspbian OS

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

I. Get Network-Manager to work on Raspbian

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