5. Dezember 2011

Bei vorhergehenden Aufgaben haben wir bereits Daten von Arduino an Processing geschickt. Hier werden nun Daten via Serial zurück an Arduino übertragen, um elektronische Bauteile steuern zu können.

#define BUFFER_SIZE 20 // actual size of the buffer for integer values: (numberOfValsToRead*6)+(numberOfValsToRead-1)
#define LED_PIN 3
#define LED_PIN2 11
#define LED_PIN3 10

char incommingBuffer[BUFFER_SIZE]; // buffer to store incomming values
char incomming; // primary buffer to store single incommning bytes
int incommingCounter = 0; // counter for counting the positions inside the buffer

int firstValue, secondValue, thirdValue; // fourthValue, fifthValue, ... // add more if needed

void setup()
{
Serial.begin(9600);
pinMode(LED_PIN, OUTPUT);
pinMode(LED_PIN2, OUTPUT);
pinMode(LED_PIN3, OUTPUT);
}

void readSerial()
{
while(Serial.available())
{
incomming = Serial.read(); // read single incommning bytes

if(incomming != '\r') //if no carriage return is received proceed in reading the serial port
{
incommingBuffer[incommingCounter++] = incomming; // go on the next position in the buffer
}
else //read until a carriage ('\r') is received
{
incommingBuffer[incommingCounter] = '\0'; // set the last byte to NULL to sign it for the string operators

char *a = strtok(incommingBuffer, ",.;"); // split the string after delimiters into tokens
char *b = strtok(NULL, ",.;"); // ...
char *c = strtok(NULL, ",.;"); // ...
//char *d = strtok(NULL, ",.;"); // add another line if needed

firstValue = atoi(a); // convert the strings into integers
secondValue = atoi(b); // ...
thirdValue = atoi(c); // ...
//fourthValue = atoi(d); // add another line if needed

incommingCounter = 0; // reset the counter
memset(incommingBuffer, 0, BUFFER_SIZE); //overwrite the incommingBuffer
}
}
}

void loop()
{
readSerial(); // read the values available at the serial port
analogWrite(LED_PIN, firstValue);
analogWrite(LED_PIN2, secondValue);
analogWrite(LED_PIN3, thirdValue);
/* Serial.print(firstValue); // debugging
Serial.print("\t");
Serial.print(secondValue);
Serial.print("\t");
Serial.print(thirdValue);
Serial.print("\t");
//Serial.print(fourthValue); // add these lines if needed
Serial.println(); // send a carriage return for debugging
*/
}

import processing.serial.*;  // Import the Processing Serial Library for communicating with arduino
Serial myPort;

void setup()
{
size(500,500);
background(0);
println(Serial.list());
myPort = new Serial(this, Serial.list()[0], 9600);
}

void draw()
{
noStroke();
fill(255,0,0);
triangle(width, 0, 0, height/2, width, height);
fill(0,255,0,180);
triangle(0, 0, width, height/2, 0, height);
fill(255,255,0,180);
triangle(0, height, width/2, 0, width, height);
fill(255);
rect(width/2,height/2,5,5);
myPort.write(str(int(map(mouseX,0,width,0,255))));
myPort.write(",");
myPort.write(str(int(map(mouseY,0,height,0,255))));
myPort.write(",");
myPort.write(str(int(map(mouseX,0,width,255,0))));
myPort.write("\r");
}