| /* |
| Serial Call and Response |
| Language: Wiring/Arduino |
| |
| This program sends an ASCII A (byte of value 65) on startup |
| and repeats that until it gets some data in. |
| Then it waits for a byte in the serial port, and |
| sends three sensor values whenever it gets a byte in. |
| |
| Thanks to Greg Shakar and Scott Fitzgerald for the improvements |
| |
| The circuit: |
| * potentiometers attached to analog inputs 0 and 1 |
| * pushbutton attached to digital I/O 2 |
| |
| Created 26 Sept. 2005 |
| by Tom Igoe |
| modified 24 April 2012 |
| by Tom Igoe and Scott Fitzgerald |
| |
| This example code is in the public domain. |
| |
| http://www.arduino.cc/en/Tutorial/SerialCallResponse |
| |
| */ |
| |
| int firstSensor = 0; // first analog sensor |
| int secondSensor = 0; // second analog sensor |
| int thirdSensor = 0; // digital sensor |
| int inByte = 0; // incoming serial byte |
| |
| void setup() |
| { |
| // start serial port at 9600 bps: |
| Serial.begin(9600); |
| while (!Serial) { |
| ; // wait for serial port to connect. Needed for Leonardo only |
| } |
| |
| pinMode(2, INPUT); // digital sensor is on digital pin 2 |
| establishContact(); // send a byte to establish contact until receiver responds |
| } |
| |
| void loop() |
| { |
| // if we get a valid byte, read analog ins: |
| if (Serial.available() > 0) { |
| // get incoming byte: |
| inByte = Serial.read(); |
| // read first analog input, divide by 4 to make the range 0-255: |
| firstSensor = analogRead(A0)/4; |
| // delay 10ms to let the ADC recover: |
| delay(10); |
| // read second analog input, divide by 4 to make the range 0-255: |
| secondSensor = analogRead(1)/4; |
| // read switch, map it to 0 or 255L |
| thirdSensor = map(digitalRead(2), 0, 1, 0, 255); |
| // send sensor values: |
| Serial.write(firstSensor); |
| Serial.write(secondSensor); |
| Serial.write(thirdSensor); |
| } |
| } |
| |
| void establishContact() { |
| while (Serial.available() <= 0) { |
| Serial.print('A'); // send a capital A |
| delay(300); |
| } |
| } |
| |
| /* |
| Processing sketch to run with this example: |
| |
| // This example code is in the public domain. |
| |
| import processing.serial.*; |
| |
| int bgcolor; // Background color |
| int fgcolor; // Fill color |
| Serial myPort; // The serial port |
| int[] serialInArray = new int[3]; // Where we'll put what we receive |
| int serialCount = 0; // A count of how many bytes we receive |
| int xpos, ypos; // Starting position of the ball |
| boolean firstContact = false; // Whether we've heard from the microcontroller |
| |
| void setup() { |
| size(256, 256); // Stage size |
| noStroke(); // No border on the next thing drawn |
| |
| // Set the starting position of the ball (middle of the stage) |
| xpos = width/2; |
| ypos = height/2; |
| |
| // Print a list of the serial ports, for debugging purposes: |
| println(Serial.list()); |
| |
| // I know that the first port in the serial list on my mac |
| // is always my FTDI adaptor, so I open Serial.list()[0]. |
| // On Windows machines, this generally opens COM1. |
| // Open whatever port is the one you're using. |
| String portName = Serial.list()[0]; |
| myPort = new Serial(this, portName, 9600); |
| } |
| |
| void draw() { |
| background(bgcolor); |
| fill(fgcolor); |
| // Draw the shape |
| ellipse(xpos, ypos, 20, 20); |
| } |
| |
| void serialEvent(Serial myPort) { |
| // read a byte from the serial port: |
| int inByte = myPort.read(); |
| // if this is the first byte received, and it's an A, |
| // clear the serial buffer and note that you've |
| // had first contact from the microcontroller. |
| // Otherwise, add the incoming byte to the array: |
| if (firstContact == false) { |
| if (inByte == 'A') { |
| myPort.clear(); // clear the serial port buffer |
| firstContact = true; // you've had first contact from the microcontroller |
| myPort.write('A'); // ask for more |
| } |
| } |
| else { |
| // Add the latest byte from the serial port to array: |
| serialInArray[serialCount] = inByte; |
| serialCount++; |
| |
| // If we have 3 bytes: |
| if (serialCount > 2 ) { |
| xpos = serialInArray[0]; |
| ypos = serialInArray[1]; |
| fgcolor = serialInArray[2]; |
| |
| // print the values (for debugging purposes only): |
| println(xpos + "\t" + ypos + "\t" + fgcolor); |
| |
| // Send a capital A to request new sensor readings: |
| myPort.write('A'); |
| // Reset serialCount: |
| serialCount = 0; |
| } |
| } |
| } |
| */ |
| |
| /* |
| Max/MSP version 5 patch to run with this example: |
| |
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| -----------end_max5_patcher----------- |
| |
| |
| |
| */ |
