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Introduction to programming AVR microcontrollers
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Introduction to programming AVR microcontrollers

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These are the slides from a talk I gave at Barcamp Brighton 2 (March 2008, Brighton, UK). It doesn't contain any actual code as I did that as a live demo, but it's got some handy links to places with …

These are the slides from a talk I gave at Barcamp Brighton 2 (March 2008, Brighton, UK). It doesn't contain any actual code as I did that as a live demo, but it's got some handy links to places with information about programming AVR chips.

Published in: Business, Technology

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Transcript

  • 1. Do you want chips with that? Physical Computing on the cheap
  • 2. What? + + =
  • 3. AVR microcontrollers
    • Embedded computer (8-bit RISC, up to 20MIPS, with ADC, PWM, timers, EEPROM...)
    • 1k to 32Mb programme memory
    • 80p to £4.50 each
    • Can be programmed in-system using C
    • Hobbyist-friendly format (DIL)
    • Used in cars, microwaves, traffic signals... and the Arduino
  • 4. Why?
    • Physical computing
    • Inputs (sensors) sound, light, motion (switches, dials, flex, pressure, accelerometer, IR/ultrasound ranging), serial input from computer
    • Outputs (actuators) sound, light (LEDs – digital and 'analog'), motion (motors, servos), other devices (using relays), serial output to computer
  • 5. How?
    • Computer (Linux, Mac, Windows)
    • AVR-GCC compiler
    • AVRdude programmer
    • Cable
    • Breadboard or socket
    • AVR chip
  • 6. How cheap?
    • £3: DIY parallel cable (search Instructables for 'ghetto programming')
    • £10: DIY serial cable (adafruit.com)
    • £15: DIY USB cable (adafruit.com)
    • £25: pre-built USB (Rapid electronics)
  • 7. Demo
    • Switch to a laptop with a serial port...
  • 8. Examples
  • 9. Programmable LED
    • Invented by Alex Weber
    • http://www.instructables.com/id/Programmable-LED/
  • 10. Micro text display
    • Invented by Windell Oskay (Evil Mad Scientist Laboratories)
    • http://www.evilmadscientist.com/article.php/microreader2
  • 11. MiniPOV
    • Invented by Limor Fried
    • http://www.ladyada.net/make/minipov2/
  • 12. Multimode mood candle
    • Invented by yours truly
    • http://www.instructables.com/member/tristanr/ (hassle me if it's not there soon: [email_address] )
  • 13. Aside: the Arduino
    • Open source hardware in a variety of shapes and sizes
    • Uses the ATMEGA168 chip
    • Easier to programme (Wiring vs C)
    • Adds: - headers for all pins - voltage regulator - status LEDs - USB-serial converter
  • 14. Links
    • Instructables - http://www.instructables.com/
    • Make Magazine - http://www.makezine.com/
    • Lada Ada - http://www.ladyada.net/make/
    • Evil Mad Scientist Laboratories - http://www.evilmadscientist.com/
    • Atmel - http://www.atmel.com/products/avr/
    • AVR Freaks - http://www.avrfreaks.net/
  • 15. P.S.
    • If anybody would like to share postage on buying some business-card sized prototype boards, please contact me: [email_address] http://www.evilmadscientist.com/article.php/card