Bussola e interrupt

[sketchbook_andrea] / interrupts / input_interrupt_1_debounce / input_interrupt_1_debounce.ino

diff --git a/interrupts/input_interrupt_1_debounce/input_interrupt_1_debounce.ino b/interrupts/input_interrupt_1_debounce/input_interrupt_1_debounce.ino
new file mode 100644 (file)
index 0000000..9361345
--- /dev/null
+++ b/interrupts/input_interrupt_1_debounce/input_interrupt_1_debounce.ino
@@ -0,0 +1,41 @@
+/*
+  Interrupts : input deboounce
+ 
+ Utilizzare un interrupt per intercettare
+ l'input di un interruttore momentaneo.
+ 
+ Debounce software nella funzione richiamata.
+ Per debounce hardware: http://www.all-electric.com/schematic/debounce.htm
+ 
+ */
+
+int ledPin = 13;
+volatile int state = LOW;
+
+void setup()
+{
+  pinMode(ledPin, OUTPUT);
+  pinMode(2, INPUT_PULLUP);
+  attachInterrupt(0, blink, FALLING);
+}
+
+void loop()
+{
+  //digitalWrite(ledPin, state);
+  delay(10000); // Mette in pausa Arduino per 10sec
+}
+
+// Funzioni
+void blink()
+// Modifica dello stato del LED
+{
+  static unsigned long last_interrupt_time = 0;
+  // If interrupts come faster than 200ms, assume it's a bounce and ignore
+  if (millis() - last_interrupt_time > 200)
+  { // Azione da intraprendere
+    state = !state;
+    digitalWrite(ledPin, state);
+  }
+  last_interrupt_time = millis();
+}
+