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| /* | |
| 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. | |
| The circuit: | |
| - potentiometers attached to analog inputs 0 and 1 | |
| - pushbutton attached to digital I/O 2 | |
| created 26 Sep 2005 | |
| by Tom Igoe | |
| modified 24 Apr 2012 | |
| by Tom Igoe and Scott Fitzgerald | |
| Thanks to Greg Shakar and Scott Fitzgerald for the improvements | |
| This example code is in the public domain. | |
| https://www.arduino.cc/en/Tutorial/BuiltInExamples/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 native USB port 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 | |
| // if using Processing 2.1 or later, use Serial.printArray() | |
| 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: | |
| ----------begin_max5_patcher---------- | |
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| -----------end_max5_patcher----------- | |
| */ | |