State machine e blinks con millis()

[sketchbook_andrea] / multitasking / BlinkWithoutDelay_3_funzione / BlinkWithoutDelay_3_funzione.ino

diff --git a/multitasking/BlinkWithoutDelay_3_funzione/BlinkWithoutDelay_3_funzione.ino b/multitasking/BlinkWithoutDelay_3_funzione/BlinkWithoutDelay_3_funzione.ino
index a5db67b3cb71611d4bb69ac263eb2358e86070fd..e27cf55d8c4e1de6ff5e67fa5022d7826c6b6198 100644 (file)
--- a/multitasking/BlinkWithoutDelay_3_funzione/BlinkWithoutDelay_3_funzione.ino
+++ b/multitasking/BlinkWithoutDelay_3_funzione/BlinkWithoutDelay_3_funzione.ino
@@ -12,7 +12,7 @@
 
 /////////////
 // First LED
-int ledA =  13;      // the number of the LED pin
+const int ledA =  13;      // the number of the LED pin
 // Variables will change:
 int ledStateA = LOW;             // ledState used to set the LED
 long previousMillisA = 0;        // will store last time LED was updated
@@ -22,8 +22,9 @@ long intervalA = 1000;           // interval at which to blink (milliseconds)
 void lightLedA () ;
 
 //////////////
-// Second LED
-int ledB = 12; //Secondo LED
+//  Second LED
+// Now with less global variables thanks to static (see function body)
+const int ledB = 12; //Secondo LED
            // ledState used to set the LED
 long previousMillisB = 0;        // will store last time LED was updated
            // interval at which to blink (milliseconds)
@@ -46,7 +47,7 @@ void loop()
 // Funzioni:
 
 void lightLedA () {
-  if(millis() - previousMillisA > intervalA) {
+  if (millis() > previousMillisA + intervalA) {
     // save the last time you blinked the LED 
     previousMillisA = millis();   
 
@@ -64,7 +65,7 @@ void lightLedA () {
 void lightLedB () {
   long intervalB = 500;
    static int ledStateB ;  // https://www.arduino.cc/en/Reference/Static
-  if(millis() - previousMillisB > intervalB) {
+  if (millis() > previousMillisB + intervalB) {
     // save the last time you blinked the LED 
     previousMillisB = millis();