Kevin Mehall kevinmehall

## fractal-intro.md

      
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                kevinmehall
                / fractal-intro.md
            
            
              Created
              October 3, 2014 02:45
            
              
                Fractal
              
          
    Fractal Components

A code generation platform for distributed embedded systems.
Most of the code in an embedded system deals with IO, both with sensors and actuators, as well as communicating with a PC, phone, or server. Typically the domain logic implementing the unique behavior that the developer actually cares about is a small portion of the code, but ends up intertwined with all the IO, making it hard to introspect and port between platforms.
Fractal is about breaking the IO into reusable chunks, called components, with structured interfaces defined by state machines, and automatically generating code for them to communicate with each other, whether they're on the same physical hardware or across a network. By simplifying IO, developers can focus on the domain logic unique to their application.
Code in multiple languages can be mixed and matched, so developers can pick the right language for each task -- Rust and C for size and speed, JS or Lua for familiarity, ease of prototyping, and existing netw

  
## Dockerfile
FROM fedora:20
RUN yum install -y git cmake make libtool \
                   mingw32 mingw32-binutils mingw32-runtime mingw32-gcc-c++ \
                   mingw32-boost mingw32-boost-static.noarch \
                   && yum clean all

## output
Ubuntu clang version 3.5.0-4ubuntu2 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
00008000 <main>:
    8000:	4802      	ldr	r0, [pc, #8]	; (800c <main+0xc>)
    8002:	2101      	movs	r1, #1
    8004:	6001      	str	r1, [r0, #0]
    8006:	4802      	ldr	r0, [pc, #8]	; (8010 <main+0x10>)
    8008:	6001      	str	r1, [r0, #0]
    800a:	4770      	bx	lr
    800c:	10001004 	.word	0x10001004
    8010:	10001008 	.word	0x10001008

## verify.rs
use std::io;
use std::io::prelude::*;
use std::fs;
use std::env;
use std::cmp::Ordering;

fn main() {
    let args: Vec<String> = env::args().collect();
    let file = io::BufReader::new(fs::File::open(&args[1]).unwrap());

## testing.md

      
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                kevinmehall
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              Last active
              August 29, 2015 14:25
            
              
                Tessel wifi testing
              
          
    Install: on both Tessels
opkg update
opkg install tcpdump
wget https://kevinmehall.net/tmp/packetspammer -O /usr/bin/packetspammer
chmod +x /usr/bin/packetspammer

Setup: on both Tessels


## b32uuid.py
import os


def randid():
    r = bytearray(os.urandom(16))
    s = ""

    for i in range(24):
        idx, pos = (i*5)/8, (i*5)%8
        val = ((r[idx] >> pos) | (r[idx+1] << (8-pos))) & ((1<<5)-1)

## canvas_springsim.html
<!doctype html>
<html><head>
<script>
function init(){
    var canvas = document.getElementById('canvas')

    var width = canvas.width = window.innerWidth-10
	var height = canvas.height = window.innerHeight-10

    var c = canvas.getContext('2d');

## saleae_uavcan.py
# Decode UAVCAN transfers from a CAN dump CSV exported from Saleae Logic

import argparse
import csv
import uavcan
from uavcan.transport import TransferManager, Frame, Transfer

def parsecsv(f):
  manager = TransferManager()
  reader = csv.reader(f, delimiter=',')

## gist:1224653
rtmpdump -v -r rtmp://livestfslivefs.fplive.net/aljazeeraflashlive-live -y "aljazeera_eng_high?videoId=883816736001&lineUpId=&pubId=6650033.03001&playerId=751182905001&affiliateId=" -W "http://admin.brightcove.com/viewer/us20110916.1045/BrightcoveBootloader.swf" -p "http://english.aljazeera.net/watch_now/" -a "aljazeeraflashlive-live?videoId=883816736001&lineUpId=&pubId=6650033.03001&playerId=751182905001&affiliateId=" | mplayer -

## async_replace.coffee
# Replace parts of `string` matching regex `pattern` with the callback value of an
# async function `fn`, which receives the regex match object and callback. Calls `cb` with
# final string when complete.
asyncReplace = (string, pattern, fn, cb)->
	console.assert(pattern.global, "asyncReplace pattern must be global (g flag)")

	outChunks = []
	lastIndex = 0
	pendingCb = 0
	FROM fedora:20
	RUN yum install -y git cmake make libtool \
	mingw32 mingw32-binutils mingw32-runtime mingw32-gcc-c++ \
	mingw32-boost mingw32-boost-static.noarch \
	&& yum clean all
	Ubuntu clang version 3.5.0-4ubuntu2 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
	00008000 <main>:
	8000: 4802 ldr r0, [pc, #8] ; (800c <main+0xc>)
	8002: 2101 movs r1, #1
	8004: 6001 str r1, [r0, #0]
	8006: 4802 ldr r0, [pc, #8] ; (8010 <main+0x10>)
	8008: 6001 str r1, [r0, #0]
	800a: 4770 bx lr
	800c: 10001004 .word 0x10001004
	8010: 10001008 .word 0x10001008
	use std::io;
	use std::io::prelude::*;
	use std::fs;
	use std::env;
	use std::cmp::Ordering;

	fn main() {
	let args: Vec<String> = env::args().collect();
	let file = io::BufReader::new(fs::File::open(&args[1]).unwrap());
	import os


	def randid():
	r = bytearray(os.urandom(16))
	s = ""

	for i in range(24):
	idx, pos = (i5)/8, (i5)%8
	val = ((r[idx] >> pos) \| (r[idx+1] << (8-pos))) & ((1<<5)-1)
	<!doctype html>
	<html><head>
	<script>
	function init(){
	var canvas = document.getElementById('canvas')

	var width = canvas.width = window.innerWidth-10
	var height = canvas.height = window.innerHeight-10

	var c = canvas.getContext('2d');
	# Decode UAVCAN transfers from a CAN dump CSV exported from Saleae Logic

	import argparse
	import csv
	import uavcan
	from uavcan.transport import TransferManager, Frame, Transfer

	def parsecsv(f):
	manager = TransferManager()
	reader = csv.reader(f, delimiter=',')
	# Replace parts of `string` matching regex `pattern` with the callback value of an
	# async function `fn`, which receives the regex match object and callback. Calls `cb` with
	# final string when complete.
	asyncReplace = (string, pattern, fn, cb)->
	console.assert(pattern.global, "asyncReplace pattern must be global (g flag)")

	outChunks = []
	lastIndex = 0
	pendingCb = 0