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DIY Solar Power System

In this document I want to describe my progress building an own solar load controller.

Problem

There exist a lot of solar load controller which you can use to build a simple solar power system. Usualy, these load controller do not provide open and well documented interfaces to access data such as:

• Solar panel voltage/current
• Battery voltage
• Consumer current

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Clang Compile Time Cookbook

In this cookbook I will discuss several techniques to reduce the compile time of the llvm frontend clang. I will put the focus on heavy template and constexpr code.

Clang Tools Pipeline

First it is important to understand the internals of clang. Clang is a collection of tools which are pipelined.

Preprocessor

• Performs the actions of the C preprocessor
• The command line option -E stops clang after this stage

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Boost Hana Cookbook

All receipies use the following include and namespace:

#include <boost/hana.hpp>
namespace bh = boost::hana;

Best Practice

• use make_basic_tuple over make_tuple since a basic_tuple is more compile time efficient.

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// API Documentation was created based on the presentation of Herb Sutter on CppCon 2018:
//   https://www.youtube.com/watch?v=80BZxujhY38
// and the original propsal:
//   http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2018/p0707r3.pdf
// and test from the implementation repo
//   https://github.com/asutton/clang/tree/095a810d0514ccc9b3ea66c546a2adc7384449ca/test/CXX/meta

// Create a meta class
template <typename T>
constexpr void meta_class(T source){

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This is a manual for OSX like touchpad gestures on arch linux for the awesome window manager. It describes how to trigger awesome actions on swiping with three fingers on the touchpad.

• Install libinput dependencies pacaur -S sf86-input-libinput libinput-gestures

• Add current user to input group sudo gpasswd -a $USER input

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# Heavily cribbed from the equivalent NixOS login script.
# This should work better with multi-user nix setups.

export NIXPKGS_CONFIG="/etc/nix/nixpkgs-config.nix"
export NIX_OTHER_STORES="/run/nix/remote-stores/*/nix"
export NIX_USER_PROFILE_DIR="/nix/var/nix/profiles/per-user/$USER"
export NIX_PROFILES="/nix/var/nix/profiles/default $HOME/.nix-profile"
export NIX_PATH="/nix/var/nix/profiles/per-user/root/channels"
export PATH="$HOME/.nix-profile/bin:$HOME/.nix-profile/sbin:/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/default/sbin:$PATH"

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#! /usr/bin/env sh

# Init paths
cd ~
mkdir -p projects
cd projects

# Load modules
module load git
module load intel/2016.2.181

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#!/usr/bin/env sh

# Create paths
cd ~
mkdir projects
cd projects

# Load modules
module purge
module load gcc/4.9.2

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#! /usr/bin/env sh
# Intel tutorial: https://software.intel.com/en-us/articles/building-a-native-application-for-intel-xeon-phi-coprocessors

# Load modules
module load intel/2016.2.181
module load cmake/3.3.1
module load boost/1.60.0-intel2016.2.181-intelmpi5.1-knc
module load gcc/4.9.3 # gives hints to icc where to find libstdc++

# Load some magic numbers

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#!/usr/bin/env sh

git clone https://github.com/psychocoderHPC/picongpu-alpaka.git
cd picongpu-alpaka
git checkout topic-cupla
cd ..

git clone https://github.com/psychocoderHPC/alpaka.git
cd alpaka
git checkout topic-picongpu-alpaka