corso 2018 L2

da Francesco Lerteri / lunedì, 13 Novembre 2017 / Pubblicato il Archivio Robotica

LEZIONE n° 2 – SENSORI

La lezione è sui sensori e sulla loro gestione. I primi sensori che saranno gestiti sono i LED.

Per provare a fare le modifiche proposte copiare il listato (colorato in rosso) ed incollarlo in un editor di solo testo [Notepad ad esempio]

listato programma esempio numero 1:

/* Blink

Turns on and off a light emitting diode(LED) connected to a digital pin.

The circuit:
* LED attached from pin 13 to ground.
* Note: on most Arduinos, there is already an LED on the board
that’s attached to pin 13, so no hardware is needed for this example.
*/

// set pin numbers:
const int ledPin = 13; // the number of the LED pin

// Variables will change:
int ledState = LOW; // ledState used to set the LED

void setup() {
pinMode(ledPin, OUTPUT); // set the digital pin as output:
}

void loop() // here is where you’d put code that needs to be running all the time.
{ // 1000 egual 1 seconds
unsigned long tempo = 250;

digitalWrite(ledPin, HIGH);
delay(tempo);

digitalWrite(ledPin, LOW);
delay(tempo);
}

Modifiche proposte:

cambiare il tempo di accensione

listato programma esempio numero 2:

/* Blink

Turns on and off a light emitting diode(LED) connected to a digital pin.

The circuit:
* LED attached from pin 13 to ground.
* Note: on most Arduinos, there is already an LED on the board
that’s attached to pin 13, so no hardware is needed for this example.
*/

// set pin numbers:
const int buttonPin = 2; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin

// Variables will change:
int ledState = LOW; // ledState used to set the LED
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
pinMode(ledPin, OUTPUT); // set the digital pin as output:
pinMode(buttonPin, INPUT); // initialize the pushbutton pin as an input:
}

void loop() // here is where you’d put code that needs to be running all the time.
{ // 1000 egual 1 seconds
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

if (buttonState == HIGH) { // check if the pushbutton is pressed.
// turn LED on:
digitalWrite(ledPin, HIGH); // if it is, the buttonState is HIGH:
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}