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);
}
}
Modifiche proposte:
cambiare il pin di controllo
controllare il led da DUE pin
di seguito le slide della lezione
(58)
