Intro to the Arduino Topics: The Arduino Digital IO Data Representation Serial Communication

Intro to the ArduinoTopics: The ArduinoDigital IOData RepresentationSerial Communication

Topic 1: Meet Arduino Uno

What is the Arduinotodbot.com/blog/bionicarduino

Getting StartedCheck out: http://arduino.cc/en/Guide/HomePageDownload & install the Arduino environment (IDE)(not needed in lab)Connect the board to your computer via the USB cableIf needed, install the drivers (not needed in lab)Launch the Arduino IDESelect your boardSelect your serial portOpen the blink example Upload the program

Arduino IDESee: http://arduino.cc/en/Guide/Environment for more information

Select Serial Port and Board

Status Messagestodbot.com/blog/bionicarduino

todbot.com/blog/bionicarduino

Input/OutputImage from Theory and Practice of Tangible User Interfaces at UC Berkley

Topic 2: Digital Input/OutputDigital IO is binary valuedits either on or off, 1 or 0Internally, all microprocessors are digital, why?
10

IO PinsImage from Theory and Practice of Tangible User Interfaces at UC Berkley

Arduino Digital I/0pinMode(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 currentWriting HIGH to an input pin installs a 20K pullup
www.mikroe.com/chapters/view/1

Our First Program

Topic 3: Data RepresentationYou know how information is encoded in 0s and 1s (ECE109)Lets look at the data types for programming the Arduino:

An ExampleWhat output would be generated?This will be explained laterThis prints to the screen

Topic 4: Serial CommunicationImage from http://www.ladyada.net/learn/arduino/lesson4.html

Serial CommunicationCompiling turns your program into binary data (ones and zeros)Uploading sends the bits through USB cable to the Arduino The two LEDs near the USB connector blink when data is transmittedRX blinks when the Arduino is receiving dataTX blinks when the Arduino is transmitting data

Open the Serial Monitor and Upload the Program

Some CommandsSerial.begin() - e.g., Serial.begin(9600)Serial.print() or Serial.println() - e.g., Serial.print(value)Serial.read()Serial.available()Serial.write()Serial.parseInt()Example Program

Serial-to-USB chip---what does it do?
Image from Theory and Practice of Tangible User Interfaces at UC Berkley The LilyPad and Fio Arduino require an external USB to TTY connector, such as an FTDI cable.In the Arduino Leonardo a single microcontroller runs the Arduino programs and handles the USB connection.

Two different communication protocolsSerial (TTL): Image from http://www.fiz-ix.com/2013/02/introduction-to-arduino-serial-communication/

USB ProtocolMuch more complicatedImage from http://en.wikipedia.org/wiki/USB
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Intro to the Arduino Topics: The Arduino Digital IO Data Representation Serial Communication

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Transcript of Intro to the Arduino Topics: The Arduino Digital IO Data Representation Serial Communication

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