fauxels

A wrapper for simulating my https://github.com/zeroeth/pixeltastic themes in the browser (and possibly gl/sdl)

Uses a thin header/implementation of a few functions it expects to find on an Arduino with the Neopixel library.

Can be compiled with make, or you can generate a new makefile with cmake.

Feel free to extend however you see fit. Possibly by including the actual Arduino.h and providing your own backing code.

Web Build

To compile for javascript run emmake make, to build for the web run emmake make web to generate the index/js.

Optimization and Debugging

If issues arise, try adding -profile and setting -O0 as documented http://kripken.github.io/emscripten-site/docs/optimizing/Optimizing-Code.html

How it works

Back story: Normally the Arduino IDE run the .ino sketch files through a preprocessor to wrap your loop() and setup() functions in a .cpp file that has a main and includes arduino.h

To get fauxels working: place your sketch in the sketch folder (the project file should be called sketch.ino)

Flow of operation

• fauxels.cpp is the entry point that runs your arduino loop. It also has an emscripten define to appease how javascript deals with infinite loops.

• Arduino.cpp is a thin (feel free to modify it as you want, I'm not trying to write a 100% accurate electrical simulator) wrapper for methods the Arduino sketch expects.

• Adafruit_NeoPixel.cpp is an incomplete wrapper for the NeoPixel library, just the functions I'm currently using. It also does one important thing, declare an extern for two methods.

• fauxels.js emscripten allows you to pass a library module (see: http://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#implement-c-in-javascript). This module listens to the neopixel wrapper and draws circles on canvas!