Bare metal Javascript & GPIO programming in Linux
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Frederik Vannieuwenborg discusses the integration of hardware and software solutions for connecting devices and processes via connected technologies. The document includes an overview of various hardware platforms like Intel Edison, BeagleBone Black, and Raspberry Pi, along with programming frameworks like Node.js, Johnny-Five, and Cylon.js for Internet of Things applications. It emphasizes the use of JavaScript for microcontroller programming and provides practical examples of utilizing different sensors and devices.
Bare metal Javascript & GPIO programming in Linux
- 1. BAREMETALJAVASCRIPT C o n n e c t e d s o l u t i o n s & d i g i t a l s e r v i c e s Frederik Vannieuwenborg – 29/10/2015 IN LINUX & GPIO PROGRAMMING
- 2. WHO AM I? Frederik Vannieuwenborg Technical Partner Aptus Media & Communication Technology Zwevegem @vannieuwenborgf
- 3. What we do? We combine hardware (electronics) and software (embedded software, cloud, mobile and web applications) with connectivity solutions to help connect devices and people and processes. HARDWARE PROTOTYPE WIRELESS COMM. ELECTRONICS MICROCONTROLLER A BRIDGE BETWEEN THE PHYSICAL AND DIGITAL WORLD INTERACTION BETWEEN INTERNET, THINGS AND DATA DATA Internet Things CLOUD BIG DATA EMBEDDED SOFTWARE MOBILE APPS HTML5/CSS3/JS
- 7. It’s all about using JavaScript on micro-controller boards or single-board computers
- 8. Agenda NodeJS FrameworksHardware Frameworks FrameworksDemo
- 10. - Server-side JavaScript runtime - Built on Chrome's V8 JavaScript engine - Non-blocking I/O - Single threaded - Event driven - Async Node.js
- 12. BlockingI/O
- 13. Non-blockingI/O
- 14. var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello Worldn'); }).listen(1337, "127.0.0.1"); console.log('Server running at http://127.0.0.1:1337/'); Basic examples var fs = require('fs'); fs.readFile(‘somefile.txt', 'utf8', function(err, contents) { console.log(contents); });
- 15. Application JavaScript Code Node.js JavaScript built-in library Node.js C++ Layer libuv OpenSSL zlib c-ares The Node.jsinternals
- 16. The Node.jssystem APPLICATION V8 (JAVASCRIPT ENGINE) NODE.JS BINDINGS (NODE API) JAVASCRIPT OS OPERATION LIBUV (ASYNCHRONOUS I/O) EVENT QUEUE WORKER THREADS FILE SYSTEM NETWORK PROCESS EVENT LOOP BLOCKING OPERATION EXECUTE CALLBACK
- 17. Don’tuse Node.js for… - CPU intensive tasks - Long running CPU tasks will block the whole server - File-processing - Multi-threaded processing - You can run multiple Node processes running in parallel though
- 18. Command line utility to install Node.js packages, do version management and dependency management of Node.js packages.
- 19. HARDWARE
- 20. IntelEdison
- 21. IntelEdison - 32-bit Intel® Atom™ Processor @ 500 MHz - 1 GBRAM LPDDR3 memory - 4 GB storage - Wireless Dual-band (2.4 and 5 GHz) & Bluetooth - Connector 70-pin Hirose - USB 2.0 1 OTG controller - I/O 40 general purpose GPIO - 4 capable of PWM
- 23. IntelEdison – Arduino breakout Kit
- 24. IntelEdison – Sparkfun block
- 27. // Load Grove module var groveSensor = require('jsupm_grove'); // Create the button object using GPIO pin 0 var button = new groveSensor.GroveButton(0); // Read the input and print, waiting one second between readings function readButtonValue() { console.log(button.name() + " value is " + button.value()); } setInterval(readButtonValue, 1000);
- 28. var LEDBar = require("jsupm_my9221"); var myLEDBar = new LEDBar.MY9221(2, 3); var directionBool = true; var myInterval = setInterval(function() { show_LED(1, directionBool); }, 1000 ); function show_LED(level, direction) { if (level <= 10) { myLEDBar.setBarLevel(level, directionBool); setTimeout(show_LED, 50, ++level, directionBool); } else directionBool = !directionBool; } process.on('SIGINT', function() { myLEDBar.setBarLevel(0, true); clearInterval(myInterval); console.log("Exiting..."); process.exit(0); });
- 29. var groveSensor = require('jsupm_grove'); var led = new groveSensor.GroveLed(2); console.log(led.name()); var i = 0; var waiting = setInterval(function() { if ( i % 2 == 0 ) { led.on(); } else { led.off(); } i++; if ( i == 20 ) clearInterval(waiting); }, 1000);
- 30. Tessel.io
- 31. Tessel.io - 2 Module ports - 2 USB ports - Wifi & Ethernet - 580MHz Mediatek MT7620n - 64 MB RAM & 32 MB Flash - 48MHz Atmel SAMD21 co- processor - microUSB
- 35. Beaglebone black
- 36. Beaglebone black - Produced by Texas Instruments in association with Digi- Key and Newark element14 - AM335x 1GHz ARM® Cortex-A8 & 512MB DDR3 RAM - 4GB 8-bit eMMC on-board flash storage - 3D graphics accelerator - 2x PRU 32-bit microcontrollers - USB client host - Ethernet & HDMI - 2x 46 pin headers
- 37. Beaglebone black - Debian - Android - Ubuntu - Cloud9 IDE on Node.js w/ BoneScript library BoneScript is a Node.js library specifically optimized for the Beagle family and featuring familiar Arduino function calls, exported to the browser.
- 38. Cloud9IDE
- 40. Raspberry PI
- 41. Raspberry PI - Low cost credit-card sized computer - 900MHz quad-core ARM Cortex-A7 CPU - 1GB RAM - 4 USB ports - Full HDMI port, Ethernet port - Combined 3.5mm audio jack and composite video - Camera interface (CSI) & Display interface (DSI) - Micro SD card slot - VideoCore IV 3D graphics core
- 42. Raspberry PI - Default: Debian - The Raspberry Pi Internet of Things Framework - http://webiopi.trouch.com/ - The ThingBox Project - Use Internet of Things technologies without any technical knowledge and for free - http://thethingbox.io/
- 45. FRAMEWORKS
- 47. var five = require("johnny-five"); var board = new five.Board(); board.on("ready", function() { // Create a standard `led` instance var led = new five.Led(13); // "blink" the led in 500ms led.blink(500); }); *The JavaScript program is executed on a host machine that runs node.js
- 48. Cylon.js is a JavaScript framework for robotics, physical computing, and the Internet of Things. It makes it incredibly easy to command robots and devices.
- 49. Cylon.js - Connects 36 platforms - Raspberry PI, Arduino, Pebble, … - Drivers for General Purpose Input/Output hardware - LED, buttons, sensors, … - Node based
- 50. Cyclon.js - demo - Push button - Log “Push button” - Toggle LED - Run “ToggleLed” - Log “ToggleLed” - Toggle LED
- 51. Node-RED is a tool for wiring together hardware devices, APIs and online services in new and interesting ways.
- 53. De geldfretter
- 55. Node-REDinstallation http://nodered.org/docs/hardware/raspberrypi.html *No support for node 4.x curl -sL https://deb.nodesource.com/setup_0.12 | sudo bash DOWNLOAD INSTALL SCRIPT sudo apt-get install -y build-essential python-dev python-rpi.gpio nodejs INSTALLATION nodejs START NODEJS npm cache clean sudo npm install -g node-red INSTALL NODE-RED sudo node-red START NODE-RED
- 59. Servo
- 63. Help us,we need your support!
- 64. Aptus HQ Veldkant 33b 2550 Kontich Aptus Offices Stedestraat 51 8530 Harelbeke Frederik Vannieuwenborg http://twitter.com/WeAreAptus http://www.aptus.be Let’s talk!
Editor's Notes
- #8: It’s all about using JavaScript on micro-controller boards or single-board computers
- #9: Agenda: baremetal javascript
- #10: Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js' package ecosystem, npm, is the largest ecosystem of open source libraries in the world.
- #46: Frameworks