Programming arduino makeymakey

Workshop Makey Makey (Arduino) Jelle.saldien@howest.be

Principle Sensors READ Your Sketch [C] inputs UPLOAD ARDUINO ATmega328 COMMUNICATE outputs Actuators WRITE

Arduino Board Microcontroller ATmega328 Opera-ng Voltage 5 V Input Voltage (recommended) 7-‐12 V Input Voltage (limits) 6-‐20 V Digital I/O Pins 14 (of which 6 provide PWM output) Analog Input Pins 6 DC Current per I/O Pin 40 mA DC Current for 3.3V Pin 50 mA 32 KB (ATmega328) of which 2 KB used by Flash Memory bootloader SRAM 2 KB (ATmega328) EEPROM 1 KB (ATmega328) Clock Speed 16 MHz

Arduino IDE •  IDE: –  Integrated –  Development –  Environment

Code Structure: setup func`on setup func`on is executed only once at the start 10

Code Structure: loop funcòn loop funcòn is repeated indefinitely 11

Code pinMode(13, Output)! prepare pin 13 for outputs of voltage Digital I/O Func`ons: pinMode digitalWrite digitalRead 12

Code digitalWrite(13, HIGH)! Sets pin 13 to a voltage that means “on” Digital I/O Func`ons: pinMode digitalWrite digitalRead 13

Code delay(1000);! Tells microcontroller to do nothing for 1000 ms = 1 s Digital I/O Func`ons: pinMode digitalWrite digitalRead 14

Code digitalWrite(13, LOW)! Sets pin 13 to voltage that means “oﬀ” Digital I/O Func`ons: pinMode digitalWrite digitalRead 15

Basic Programming •  The pinMode() funcòn configures a pin as either an input or an output. To use it: –  You pass it the number of the pin to configure and the constant INPUT or OUTPUT. •  pinMode(11, INPUT); •  pinMode(13, OUTPUT); –  When configured as an input, a pin can detect the state of a sensor like a pushbujon. –  As an output, it can drive an actuator like an LED.

Basic Programming •  The digitalWrite() func`ons outputs a value on a pin (0 – 19). •  Possible values are: –  LOW (0 V) –  HIGH (5 V) •  For example: –  digitalWrite(13, HIGH); –  digitalWrite(11, LOW);

Basic Programming •  The digitalRead() func`on reads a value on a pin (0 – 19). •  Possible values are: –  LOW (0 V) –  HIGH (5 V) •  For example: –  Int x = digitalRead(13); –  Boolean value = digitalRead(11);

Basic Programming •  The analogWrite() func`ons outputs a PWM value on a pin (3,5,6,9,10,11). •  Possible values are: –  0 (0 V) –  127 (2,5 V) –  255 (5 V) •  For example: –  analogWrite(3, 0); –  analogWrite(11, 200);

Basic Programming •  The analogRead() func`ons reads analog value on a pin (A0 – A5). •  Possible values are: –  0 (0 V) –  512 (2,5 V) –  1024 (5 V) •  For example: –  Int value = analogRead(0); –  Int valueSensor = analogRead(5);

Glossary of Arduino Programming Terms Variable Types: int Pos (32767) or neg (-32768) - 2 Bytes long Pos (2,147,483,647) or neg (-2,147,483,648) - 4B ﬂoat Floating point math (0,0000001) – 4B char Character values: a , b , D , 1 – 1B boolean True or false values – 1 bit 21

Loops • Loops allow code to be repeated –  Repeated code goes in a block, surrounded by { } –  for loops •  need a counter –  while loops need an escape int •  i; // declare counter! ! for ( i=0; i<=12; i++ ) { // standard structure! ! Serial.println(i); // send value of i to serial monitor! ! }! 22

Loops Iniàl value of counter i=0 only on first pass through the loop Stopping test: Con`nue while this condiòn is true int i; // declare counter! ! for ( i=0; i<=12; i++ ) { // standard structure! ! Serial.println(i); // send value of i to serial monitor! ! }! Increment: How to change i on each pass through the loop 23

Loops Common loop: increment by one for ( i=0; i<=12; i++ ) { // increment by one! ... code block goes here! }! Common loop: increment by two for ( i=0; i<=12; i+=2 ) { // increment by two! ... code block goes here! }! Decrement by one for ( i=12; i>=0; i-- ) { // decrement by one! ... code block goes here! }! 24

Input Bujon Pin 2 void setup() { pinMode(13, OUTPUT); // declare LED as output pinMode(2, INPUT); // declare switch as input } void loop() { if (digitalRead(2) == HIGH) // check if input is HIGH { digitalWrite(13, HIGH); // turns the LED on delay(1000); // pause for 1 second digitalWrite(13, LOW); // turns the LED off delay(1000); // pause for 1 second } }

hjp://processing.org/ Now connect with Processing... hjp://io.workspace.howest.be/Workshop/MM.zip Ref: GeJng Started with Processing – Casey Reas & Ben Fry (O’REILLY – 2010)

What is Processing ? Create images, anima`ons and interac`ons through “sketching” with code

What is Processing ? Software Prototyping_

Assignment for today... DESIGN YOUR ENTERTAINMENT SYSTEM

Example Kirby’s ﬂying adventure

Example threadmill supermario

Example Smoking IR-‐Gun

Principle for game interface Sensors READ Your Sketch [C] inputs UPLOAD ARDUINO ATmega328 COMMUNICATE outputs Actuators WRITE

Principle for game interface Sensors READ Bujon_ communi-‐ ca`on.pde inputs UPLOAD ARDUINO ATmega328 COMMUNICATE outputs Nintendo NES Processing (emulator)

Bujon_communica`on.pde •  hjp://www.arduino.cc/en/Tutorial/Bujon void setup() { Serial.begin(9600); pinMode(ledPin, OUTPUT); pinMode(buttonPin, INPUT); } void loop(){ buttonState = digitalRead(buttonPin); if (buttonState == HIGH) { Serial.print(‘LEFT', BYTE); digitalWrite(ledPin, HIGH); } else { Serial.print(‘RIGHT', BYTE); digitalWrite(ledPin, LOW); } delay(15); }

Processing Code •  basic_example_vNESp5_arduino.pde

Resources •  hjp://www.arduino.cc/ •  hjp://processing.org/ •  hjp://mcanet.info/vNESp5/ •  hjp://io.workspace.howest.be/Workshop/MM.zip

Programming arduino makeymakey

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