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[sketchbook_andrea] / multitasking / BlinkWithoutDelay_2_led / BlinkWithoutDelay_2_led.ino

diff --git a/multitasking/BlinkWithoutDelay_2_led/BlinkWithoutDelay_2_led.ino b/multitasking/BlinkWithoutDelay_2_led/BlinkWithoutDelay_2_led.ino
index 293e2172a7319c2d573631f57644ee38747341ea..2100ead96aaba26397c4f252881e6c134b79eac6 100644 (file)
--- a/multitasking/BlinkWithoutDelay_2_led/BlinkWithoutDelay_2_led.ino
+++ b/multitasking/BlinkWithoutDelay_2_led/BlinkWithoutDelay_2_led.ino
@@ -24,20 +24,20 @@
 
 // constants won't change. Used here to 
 // set pin numbers:
-const int ledA =  13;      // the number of the LED pin
-int ledB = 12; //Secondo LED
+const int ledA = 13;      // Primo LED
+const int ledB = 12;      // Secondo LED
 
-// Variables will change:
+// Variabbili di stato
 int ledStateA = LOW;             // ledState used to set the LED
 int ledStateB = LOW;             // ledState used to set the LED
-
+              
 long previousMillisA = 0;        // will store last time LED was updated
 long previousMillisB = 0;        // will store last time LED was updated
 
 // the follow variables is a long because the time, measured in miliseconds,
 // will quickly become a bigger number than can be stored in an int.
 long intervalA = 1000;           // interval at which to blink (milliseconds)
-long intervalB = 500;           // interval at which to blink (milliseconds)
+long intervalB = 500;            // interval at which to blink (milliseconds)
 
 void setup() {
   // set the digital pin as output:
@@ -47,14 +47,8 @@ void setup() {
 
 void loop()
 {
-  // here is where you'd put code that needs to be running all the time.
-
-  // check to see if it's time to blink the LED; that is, if the 
-  // difference between the current time and last time you blinked 
-  // the LED is bigger than the interval at which you want to 
-  // blink the LED.
-
-  if(millis() - previousMillisA > intervalA) {
+// Primo LED
+  if (millis() > previousMillisA + intervalA) {
     // save the last time you blinked the LED 
     previousMillisA = millis();   
 
@@ -67,7 +61,8 @@ void loop()
     digitalWrite(ledA, ledStateA);
   }
   
-    if(millis() - previousMillisB > intervalB) {
+// Secondo LED
+    if (millis() > previousMillisB + intervalB) {
     // save the last time you blinked the LED 
     previousMillisB = millis();   
 
@@ -83,8 +78,10 @@ void loop()
 
 /* Domande
  1. Provare a isolare il codice per accendere ogni singolo led in una funzione:
-    Quali variabili determinano il comportamento del LED?
-    Sono globali o locali? 
+    - Quali variabili determinano il comportamento del LED?
+    - Come cambiano durante il corso dello script?
+    - Sono globali o locali? 
+    - Quali parti vanno eseguite una sola volta e quali a ogni esecuzione?
  */