Arduino: Open Source Hardware Hacking from the Software Nerd Perspective

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A fast introduction to the Arduino platform from the perspective of a recent convert to hardware.

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Arduino: Open Source Hardware Hacking from the Software Nerd Perspective

  1. 1. Arduino: Open Source Hardware Hacking from the Software Nerd Perspective Howard M. Lewis Ship TWD Consulting hlship@gmail.com 1 © 2010 Howard M. Lewis Ship
  2. 2. Qualifications 2 © 2010 Howard M. Lewis Ship
  3. 3. Me Hardware 3 © 2010 Howard M. Lewis Ship
  4. 4. ~ 1980 • 6502 CPU • 8 bit accumulator • Two 8 bit registers • 1 MHz • 8 KB Ram (Upgrade!) • 30x30 B/W display • 300 baud cassette 4 © 2010 Howard M. Lewis Ship
  5. 5. Hot End 5 © 2010 Howard M. Lewis Ship
  6. 6. OSCON 2009 6 © 2010 Howard M. Lewis Ship http://www.makershed.com/ProductDetails.asp?ProductCode=MKCE4
  7. 7. 7 © 2010 Howard M. Lewis Ship
  8. 8. 8 © 2010 Howard M. Lewis Ship
  9. 9. Open Source … Hardware? 9 © 2010 Howard M. Lewis Ship
  10. 10. 10 © 2010 Howard M. Lewis Ship
  11. 11. 11 © 2010 Howard M. Lewis Ship In addition, the IDE is free and open source, as is the bootloader that gets your code from the IDE and onto the Arduino.
  12. 12. Digital Analog CPU / Clock Flash RAM EEPROM Pins / Pins PWM ATmega 328 / Duemilanove 32 KB 2 KB 1 KB 14 / 6 6 16 MHz ATmega1280 MEGA 128 KB 8 KB 4 KB 54 / 14 16 / 16 MHz ATmega 168 / 16 KB 1 KB 512 B 14 / 6 6 16 MHz 12 © 2010 Howard M. Lewis Ship http://arduino.cc/ http://www.dorkbotpdx.org/wiki/dorkboard
  13. 13. Baby Steps: LED Arduino 13 © 2010 Howard M. Lewis Ship LED is Light Emitting Diode. Diodes are one-way elements (electricity does not flow backwards). The long pin is the anode, which connects to positive current. The short pin is the cathode, which connects to negative current (the ground). The glass enclosure usually has a flat side to indicate the cathode. http://en.wikipedia.org/wiki/Led
  14. 14. 14 © 2010 Howard M. Lewis Ship
  15. 15. 15 © 2010 Howard M. Lewis Ship
  16. 16. 16 © 2010 Howard M. Lewis Ship
  17. 17. Your Code Frameworks Application Server Virtual Standard Machine Library Operating HAL Drivers System BIOS Hardware 17 © 2010 Howard M. Lewis Ship
  18. 18. Your Code 18 © 2010 Howard M. Lewis Ship
  19. 19. Your Code Standard Library Add-on Libraries Hardware: Arduino Microcontroller / Switches, Sensors, etc. 19 © 2010 Howard M. Lewis Ship
  20. 20. 20 © 2010 Howard M. Lewis Ship
  21. 21. Button Arduino Vcc 21 © 2010 Howard M. Lewis Ship
  22. 22. #define LED_PIN 11 #define BUTTON_PIN 7 void setup() { pinMode(LED_PIN, OUTPUT); pinMode(BUTTON_PIN, INPUT); } void loop() { digitalWrite(LED_PIN, digitalRead(BUTTON_PIN)); } 22 © 2010 Howard M. Lewis Ship
  23. 23. 23 © 2010 Howard M. Lewis Ship
  24. 24. ? Arduino Vcc 24 © 2010 Howard M. Lewis Ship
  25. 25. 240 Ω 10000 Ω Arduino Vcc 25 © 2010 Howard M. Lewis Ship
  26. 26. 26 © 2010 Howard M. Lewis Ship
  27. 27. Analog Input ARef Arduino Analog 5 27 © 2010 Howard M. Lewis Ship The center pin is the output pin. The Arduino reads it as a value between 0 and 1023. The other pins are connected to the Arduino's AREF (Analog Reference) voltage pin, and to ground.
  28. 28. 28 © 2010 Howard M. Lewis Ship
  29. 29. #define LED_PIN 11 #define POT_PIN 5 void setup() { pinMode(LED_PIN, OUTPUT); } void loop() { int potValue = analogRead(POT_PIN); analogWrite(LED_PIN, potValue >> 2); } Pulse Width Modulation 29 © 2010 Howard M. Lewis Ship
  30. 30. Scaling Up 30 © 2010 Howard M. Lewis Ship
  31. 31. Shift Register Shift Register Arduino 31 © 2010 Howard M. Lewis Ship http://en.wikipedia.org/wiki/Shift_register
  32. 32. LED Digit 1 16 2 32 4 64 8 128 32 © 2010 Howard M. Lewis Ship
  33. 33. const int latchPin = 11; // ST_CP (12) const int clockPin = 10; // SH_CP (11) const int dataPin = 9; // DS (14) boolean status = false; byte ledValue = 0; void setup() { pinMode(latchPin, OUTPUT); pinMode(clockPin, OUTPUT); pinMode(dataPin, OUTPUT); } 33 © 2010 Howard M. Lewis Ship
  34. 34. const byte digits[] = { B01111110, // 0 B00001100, // 1 B10110110, // 2 B10011110, // 3 B11001100, // 4 B11011010, // 5 B11111010, // 6 B00001110, // 7 B11111110, // 8 B11001110, // 9 B10111110, // A B11111000, // B B10110000, // C B10111100, // D B11110010, // E B11100010 // F }; 34 © 2010 Howard M. Lewis Ship
  35. 35. void writeDigit(byte value, boolean showDP) { // Ignore all but the low 4 bits when indexing byte digit = digits[value & 0x0f]; // Decimal point is LSB if (showDP) digit |= 1; shiftOut(dataPin, clockPin, MSBFIRST, digit); } 35 © 2010 Howard M. Lewis Ship
  36. 36. void loop() { status = !status; digitalWrite(latchPin, LOW); writeDigit(ledValue >> 4, status == true); writeDigit(ledValue, status == false); digitalWrite(latchPin, HIGH); ledValue++; // Increment, loop back to zero delay(128); } 36 © 2010 Howard M. Lewis Ship
  37. 37. Next Steps ... • More interesting sensors • Motion sensor • Optical switches • Accelerometer • GPS • more! • … and displays (8x8 RGB Matrix) 37 © 2010 Howard M. Lewis Ship
  38. 38. 38 © 2010 Howard M. Lewis Ship Getting Started with Arduino: http://oreilly.com/catalog/9780596155520 Practical Arduino: http://www.practicalarduino.com/ Practical Electronics for Inventors: http://www.mhprofessional.com/product.php?isbn=9780071452816 Understand Electronics: http://www.amazon.com/Understand-Electronics-Teach-Yourself-Guide/dp/0071740015
  39. 39. Summary • Easy to get started! • Don't Fear the Soldering Iron • Be in control! • Have fun! 39 © 2010 Howard M. Lewis Ship
  40. 40. Slides • Will be available on SlideShare http://www.slideshare.net/hlship • … and rate me at SpeakerRate: http://speakerrate.com/speakers/3749- howard-m-lewis-ship 40 © 2010 Howard M. Lewis Ship
  41. 41. © 2006 Kevin Jaako http://www.flickr.com/photos/jaako/111131894/ © 2009 Adam Evans http://www.flickr.com/photos/astroporn/3918373246/ © 2006 jopemoro http://www.flickr.com/photos/jopemoro/81013003/ © 2008 shane doucette http://www.flickr.com/photos/51512551@N00/3027058889/ © 2006 Nelson Minar http://www.flickr.com/photos/nelsonminar/302035574/ © 2008 Thomas Hawk http://www.flickr.com/photos/thomashawk/2598531205/ © 2009 dnnya17 http://www.flickr.com/photos/dnnya/3462481080/ © 2006 Iain Fergusson http://en.wikipedia.org/wiki/File:Potentiometer.jpg 41 © 2010 Howard M. Lewis Ship

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