1. INTRODUCTION TO ARDUINO
PROGRAMMING & INTERFACING
Topics:
Microcontrollers
Programming Basics: structure and
variables
Digital Output
Analog to Digital Conversion
2. What is a Microcontroller
• A small computer on a single chip
• containing a processor, memory, and input/output
• Typically "embedded" inside some device that they control
• A microcontroller is often small and low cost
3. What is a Development Board
• A printed circuit
board designed to
facilitate work with a
particular
microcontroller.
• Typical components include:
• power circuit
• programming interface
• basic input; usually buttons and LEDs
• I/O pins
7. Getting Started
• Check out: http://arduino.cc/en/Guide/HomePage
1. Download & install the Arduino environment (IDE)
2. Connect the board to your computer via the UBS cable
3. If needed, install the drivers (not needed in lab)
4. Launch the Arduino IDE
5. Select your board
6. Select your serial port
7. Open the blink example
8. Upload the program
13. Add an External LED to pin 13
• File > Examples > Digital > Blink
• LED’s have polarity
– Negative indicated by flat side of the housing
and a short leg
14. A Little Bit About Programming
• Code is case
sensitive
• Statements are
commands and
must end with a
semi-colon
• Comments follow
a // or begin with /*
and end with */
• Loop and Setup
17. Digital I/0
pinMode(pin, mode)
Sets pin to either INPUT or OUTPUT
digitalRead(pin)
Reads HIGH or LOW from a pin
digitalWrite(pin, value)
Writes HIGH or LOW to a pin
Electronic stuff
Output pins can provide 40 mA of current
Writing HIGH to an input pin installs a 20KΩ pullup
www.mikroe.com/chapters/view/1
18. Arduino Timing
• delay(ms)
– Pauses for a few milliseconds
• delayMicroseconds(us)
– Pauses for a few microseconds
• More commands:
arduino.cc/en/Reference/HomePage
19. Digital? Analog?
• Digital has two values: on and off
• Analog has many (infinite) values
• Computers don’t really do analog, they quantize
• Remember the 6 analog input pins---here’s how
they work
22. Putting It Together
• Complete the sketch
(program) below.
• What output will be
generated by this program?
• What if the schematic were
changed?
