Robert Sung-wook Shin edp1096

How to compile and run Klipper on atmega2560 + OctoPrint from Windows 7 x64

Situation

I own an Anycubic Kossel delta 3D printer, running custom Marlin firmware, custom mainboard(atmega2560), connected to my PC via USB (USB Serial), controlled mostly via Printrun(Pronterface)
I want ultra high performance and latest improvements in my 3D printer, with the help from Klipper software/firmware
Normally you should go get an Raspberry Pi and do everything (compile/install Klipper / OctoPrint) from there, but I don't have a Pi, don't want to mess with the cables, decided to run Klipper from my PC

Steps

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

Goroutines

Office Web Apps Viewer

('.ppt' '.pptx' '.doc', '.docx', '.xls', '.xlsx')

http://view.officeapps.live.com/op/view.aspx?src=[OFFICE_FILE_URL]

<iframe src='https://view.officeapps.live.com/op/embed.aspx?src=[OFFICE_FILE_URL]' width='px' height='px' frameborder='0'>
</iframe>

OneDrive Embed Links

TL;DR

Create 10GB FreeBSD image using QEMU.
Run the VM using xhyve.
Mount host directory.
Resize the image.

Requisites

OSX
Homebrew

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

wrk -t4 -c400 -d10s http://127.0.0.1:1337/

PHP

Running 10s test @ http://127.0.0.1:1337/
  4 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
 Latency 7.02ms 6.94ms 82.86ms 85.27%

	package main

	import (
	"crypto/rand"
	"crypto/hmac"
	"crypto/sha1"
	"encoding/base32"
	"time"
	"fmt"
	)

	<template lang="html">
	<div :class="'img-'+this.mainImgID" id="cvs_thumnails_box">
	<canvas id="cvs">
	</canvas>
	<div id="thumbnails">
	<div v-for="t in thumbnails" @click="changeImg(t.id)" :class="'thumbnail-'+ t.id" class="thumbnail">
	</div>
	</div>
	</div>
	</template>

	// Simple groupcache example: https://github.com/golang/groupcache
	// Running 3 instances:
	// go run groupcache.go -addr=:8080 -pool=http://127.0.0.1:8080,http://127.0.0.1:8081,http://127.0.0.1:8082
	// go run groupcache.go -addr=:8081 -pool=http://127.0.0.1:8081,http://127.0.0.1:8080,http://127.0.0.1:8082
	// go run groupcache.go -addr=:8082 -pool=http://127.0.0.1:8082,http://127.0.0.1:8080,http://127.0.0.1:8081
	// Testing:
	// curl localhost:8080/color?name=red
	package main

	import (

	# http://caddyserver.com/download

	http://localhost:8080 {
	startup php.cmd &
	fastcgi / 127.0.0.1:9123 php
	}