Arduino Due communication with PC running Processing 2.0

Similar to the example "Read byte from Serial port and set pin", this example demonstrate how to control LED on Arduino Due board with PC running Processing 2.0.


It's the code in the Arduino Due side, the PC side Processing code will be in next post.

int led = 13;
int incomingByte = 0;
 
void setup() {
    pinMode(led, OUTPUT);
     
    //Setup Serial Port with baud rate of 9600
    Serial.begin(9600);
    Serial.println("Press H to turn LED ON");
    Serial.println("Press L to turn LED OFF");
}
 
void loop() {
    if (Serial.available() > 0) {
        // read the incoming byte:
        incomingByte = Serial.read();
     
        if(incomingByte == 'H'){
            digitalWrite(led, HIGH);
            Serial.println("LED ON");
        }else if(incomingByte == 'L'){
            digitalWrite(led, LOW);
            Serial.println("LED OFF");
        }else{
            Serial.println("invalid!");
        }
       
    }
}