mirror of
https://github.com/arduino/Arduino.git
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1194 lines
25 KiB
Plaintext
1194 lines
25 KiB
Plaintext
/*
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Serial Call and Response
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Language: Wiring/Arduino
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This program sends an ASCII A (byte of value 65) on startup
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and repeats that until it gets some data in.
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Then it waits for a byte in the serial port, and
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sends three sensor values whenever it gets a byte in.
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Thanks to Greg Shakar and Scott Fitzgerald for the improvements
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The circuit:
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* potentiometers attached to analog inputs 0 and 1
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* pushbutton attached to digital I/O 2
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http://www.arduino.cc/en/Tutorial/SerialCallResponse
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Created 26 Sept. 2005
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by Tom Igoe
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Modified 14 April 2009
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by Tom Igoe and Scott Fitzgerald
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*/
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int firstSensor = 0; // first analog sensor
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int secondSensor = 0; // second analog sensor
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int thirdSensor = 0; // digital sensor
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int inByte = 0; // incoming serial byte
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void setup()
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{
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// start serial port at 9600 bps:
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Serial.begin(9600);
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pinMode(2, INPUT); // digital sensor is on digital pin 2
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establishContact(); // send a byte to establish contact until receiver responds
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}
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void loop()
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{
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// if we get a valid byte, read analog ins:
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if (Serial.available() > 0) {
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// get incoming byte:
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inByte = Serial.read();
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// read first analog input, divide by 4 to make the range 0-255:
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firstSensor = analogRead(0)/4;
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// delay 10ms to let the ADC recover:
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delay(10);
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// read second analog input, divide by 4 to make the range 0-255:
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secondSensor = analogRead(1)/4;
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// read switch, map it to 0 or 255L
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thirdSensor = map(digitalRead(2), 0, 1, 0, 255);
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// send sensor values:
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Serial.print(firstSensor, BYTE);
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Serial.print(secondSensor, BYTE);
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Serial.print(thirdSensor, BYTE);
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}
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}
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void establishContact() {
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while (Serial.available() <= 0) {
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Serial.print('A', BYTE); // send a capital A
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delay(300);
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}
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}
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/*
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Processing sketch to run with this example:
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import processing.serial.*;
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int bgcolor; // Background color
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int fgcolor; // Fill color
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Serial myPort; // The serial port
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int[] serialInArray = new int[3]; // Where we'll put what we receive
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int serialCount = 0; // A count of how many bytes we receive
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int xpos, ypos; // Starting position of the ball
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boolean firstContact = false; // Whether we've heard from the microcontroller
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void setup() {
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size(256, 256); // Stage size
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noStroke(); // No border on the next thing drawn
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// Set the starting position of the ball (middle of the stage)
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xpos = width/2;
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ypos = height/2;
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// Print a list of the serial ports, for debugging purposes:
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println(Serial.list());
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// I know that the first port in the serial list on my mac
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// is always my FTDI adaptor, so I open Serial.list()[0].
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// On Windows machines, this generally opens COM1.
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// Open whatever port is the one you're using.
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String portName = Serial.list()[0];
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myPort = new Serial(this, portName, 9600);
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}
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void draw() {
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background(bgcolor);
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fill(fgcolor);
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// Draw the shape
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ellipse(xpos, ypos, 20, 20);
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}
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void serialEvent(Serial myPort) {
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// read a byte from the serial port:
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int inByte = myPort.read();
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// if this is the first byte received, and it's an A,
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// clear the serial buffer and note that you've
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// had first contact from the microcontroller.
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// Otherwise, add the incoming byte to the array:
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if (firstContact == false) {
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if (inByte == 'A') {
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myPort.clear(); // clear the serial port buffer
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firstContact = true; // you've had first contact from the microcontroller
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myPort.write('A'); // ask for more
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}
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}
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else {
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// Add the latest byte from the serial port to array:
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serialInArray[serialCount] = inByte;
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serialCount++;
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// If we have 3 bytes:
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if (serialCount > 2 ) {
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xpos = serialInArray[0];
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ypos = serialInArray[1];
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fgcolor = serialInArray[2];
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// print the values (for debugging purposes only):
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println(xpos + "\t" + ypos + "\t" + fgcolor);
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// Send a capital A to request new sensor readings:
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myPort.write('A');
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// Reset serialCount:
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serialCount = 0;
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}
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}
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}
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*/
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/*
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Max/MSP version 5 patch to run with this example:
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{
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"boxes" : [ {
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"box" : {
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"fontname" : "Arial",
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}
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}
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, {
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"box" : {
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"maxclass" : "newobj",
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"text" : "sel 1",
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"numoutlets" : 2,
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"fontsize" : 12.0,
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"id" : "obj-6",
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"fontname" : "Arial",
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"numinlets" : 2
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}
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}
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, {
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"box" : {
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"maxclass" : "comment",
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"text" : "Serial Call-Response \n\nSends a byte out the serial port, and reads 3 bytes in. Sets foregound color, xpos, and ypos of a circle using the values returned from the serial port. \n\nNote: This patch assumes that the device on the other end of the serial port is going to send a single byte of value 65 (ASCII A) on startup. The sketch waits for that byte, then sends an ASCII A whenever it wants more data. \n\ncreated 14 Apr 2009\nby Scott Fitzgerald and Tom Igoe",
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}
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}
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, {
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"box" : {
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"maxclass" : "comment",
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"text" : "trigger (or [t]) forces right-left conventions. All the drawing and processing will happen before Max requests new values. When this trigger fires, it sends an ASCII A to ask Arduino for new values.",
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"linecount" : 3,
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}
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, {
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"text" : "reinitializes the gates when turned on and off",
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}
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, {
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"box" : {
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"text" : "checks for the ascii value of \"A\" to begin cominucation. After initial communication is made, this block shuts down.",
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*/
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