Interfacing with Other Programming Environments _Processing, _MAXMSP, _PureData,

Transcription

1 + + + Interfacing with Other Programming Environments _Processing, _MAXMSP, _PureData,

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3 Using the Firmata Library Firmata a generic protocol for communicating with microcontrollers like the Arduino from software on a host computer. The microcontroller is no longer controlled through the built-in processor, but is controlled through software on a laptop or desktop via the usb port. This allows you to interface with the pin on the Arduino board as you would in the Arduino IDE without writing your own protocols. Instructions Open Arduino Go to File>Examples >Firmata>StandardFirmata Upload the StandardFirmata code to the Arduino board note: if you are using the mega board or leonardo board with none standard number of pins, and the standard arduino pins will be read and write able. Analog 0-5 and Digital 0-13

4 Arduino Setup: 2x LED 2x 220 ohm resitor 1x potentiometer

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6 Interfacing Arduino with Processing: Installing the library for Processing download the library from Processing Library: processing-arduino.zip (Updated 11 Nov. 2011) install the library in your sketchbook folder. For Windows: Place extracted folder in C:\Users\YourUsername\Documents\Processing\libraries For Mac: the sketchbook folder is located inside ~/Documents/Processing

7 Interfacing Arduino with Processing_Built-in Functions in Library Arduino.list(): returns a list of the available serial devices. If your Arduino board is connected to the computer when you call this function, its device will be in the list. Arduino(parent, name, rate): create an Arduino object. Parent should be "this" (without the quotes); name is the name of the serial device (i.e. one of the names returned by Arduino.list()); rate is the speed of the connection ( for the v2 version of the fi rmware, for v1). Note that in the v2 library, the rate parameter is optional. To create new arduino object: arduino = new Arduino(this, Arduino.list()[0], ) pinmode(pin, mode): set a digital pin to input or output mode (Arduino.INPUT or Arduino.OUTPUT). Set pin 13 to output: arduino.pinmode(13, Arduino.Output); Set pin 9 to input: arduino.pinmode(9, Arduino.Input); digitalread(pin): returns the value of a digital pin, either Arduino.LOW or Arduino.HIGH (the pin must be set as an input). read from digital pin 9: int val = arduino.digitalread(9); digitalwrite(pin, value): writes Arduino.LOW or Arduino.HIGH to a digital pin. write to digital pin 13: arduino.digitalwrite(13, Arduino.HIGH); analogread(pin): returns the value of an analog input (from 0 to 1023). read from analog pin 0: int val = arduino.analogread(0); analogwrite(pin, value): writes an analog value (PWM wave) to a digital pin that supports it (pins 3, 5, 6, 9, 10, and 11); value should be from 0 (always off) to 255 (always on). write pwm signal to digital pin 3: arduino.analogwrite(3, 200);

8 Interfacing Arduino with Processing_Drawing Interface: Changing Color PROCESSING CODE: import processing.serial.*; import cc.arduino.*; Arduino arduino; // Create Arduino object int val = 0; // Data received from the serial port int pin = 0; //analog sensor pin void setup() { size(200, 200); //return list of arduino connected to computer println(arduino.list()); //initialize Arduino on com port as Arduino class object arduino = new Arduino(this, Arduino.list()[0], 57600); } void draw() { val = arduino.analogread(pin); background(255); // Set background to white val = map(val, 0, 1023, 0, 255); fill(val); rect(50, 50, 100, 100); }

9 Interfacing Arduino with Processing_Drawing Interface: Moving Shape PROCESSING CODE: import processing.serial.*; import cc.arduino.*; Arduino arduino; // Create Arduino object int val = 0; // Data received from the serial port int pin = 0; //analog sensor pin void setup() { size(200, 200); //return list of arduino connected to computer println(arduino.list()); //initialize Arduino on com port as Arduino class object arduino = new Arduino(this, Arduino.list()[0], 57600); } void draw() { val = arduino.analogread(pin); background(255); // Set background to white int fillcolor = map(val, 0, 1023, 0, 255); int xpos = map(val, 0, 1023, 0, width); fill(val); rect(xpos, 50, 100, 100); }

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11 Interfacing Arduino with MaxMSP via Maxuino

12 Interfacing Arduino with MaxMSP via Maxuino_Setting it up connecting to the correct com port: set pinmode for digital pins and enable digital pins: set enable analog pins:

13 Interfacing Arduino with MaxMSP via Maxuino_Video Interface: Change RGB Values Assigning analog pin input to manipulate video output: Input Patcher = Custom sub-routine

14 Interfacing Arduino with MaxMSP via Maxuino_Sound Interface: Generate Sinewave Signal Assigning analog pin input to manipulate sound output: Input Output

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16 Interfacing Arduino with PureData via Pduino 0.5

17 Interfacing Arduino with PureData via Pduino_Setting it up connecting to the correct com port: set pinmode for digital pins and enable digital pins:

18 Interfacing Arduino with PureData via Pduino_Audio Interface: generating sinewave signal connecting Arduino Analog Input to generate sinewave signal: