From: Andrea Manni <andrea@piffa.net>
Date: Sun, 29 Oct 2017 19:54:48 +0000 (+0100)
Subject: Flasher con millis
X-Git-Url: http://git.piffa.net/web?p=sketchbook_andrea;a=commitdiff_plain;h=0662b12752ee761efee7077b63c77f294e98deda

Flasher con millis
---

diff --git a/.gitignore b/.gitignore
index 8d8c367..71827a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ libraries/LedControl/
 libraries/FreeRTOS/
 libraries/Adafruit_HMC5883_Unified/
 libraries/aero
+libraries/AccelStepper
diff --git a/basic/analog_input/photo_6_smooth/photo_6_smooth.ino b/basic/analog_input/photo_6_smooth/photo_6_smooth.ino
index 60913fe..3f27170 100644
--- a/basic/analog_input/photo_6_smooth/photo_6_smooth.ino
+++ b/basic/analog_input/photo_6_smooth/photo_6_smooth.ino
@@ -64,9 +64,14 @@ int smoothRead(int sensorPin) {
   int total = 0;
   for (int i = 0; i < 10; i++) { 
     total = total + analogRead(sensorPin);
-    delay(2); // Pausa per assestare il senstore
+    delay(2); // Pausa per assestare il sensore
   }
   return(total / 10); // Valore medio
+  /* Nota: i microcontroller non sono bravi a fare le divisioni,
+     sarebbe piu' efficiente ottenere 8 valori e fare uno shift dx. di 3 bit
+     total = total >> 3 ;
+Vedi: https://www.arduino.cc/en/Reference/Bitshift
+   */
 }
 
 
diff --git a/multitasking/millis/flasher/flasher.ino b/multitasking/millis/flasher/flasher.ino
new file mode 100644
index 0000000..ffc51b1
--- /dev/null
+++ b/multitasking/millis/flasher/flasher.ino
@@ -0,0 +1,29 @@
+/* Flasher
+
+   Sequenza di lampeggi ad intervalli arbitrari
+   A ogni valore di intervallo viene fatto il toggle del PIN
+*/
+
+const int led = 13;
+
+unsigned long previousMillis = 0;        // Ultimo aggiornamento
+unsigned int intervalli[] = {100, 100, 100, 100, 500, 500} ;
+unsigned int cur = 0 ;
+
+void setup() {
+  pinMode(led, OUTPUT);
+}
+
+void loop()
+{
+  if (millis() - previousMillis >= intervalli[cur]) {
+    previousMillis += intervalli[cur] ;
+    digitalWrite(led, !digitalRead(led));
+    
+    if (cur < sizeof(intervalli) / sizeof(intervalli[0]) -1 ) {
+      cur++;
+    } else {
+      cur = 0;
+    }
+  }
+}
diff --git a/multitasking/millis/zapper/blink/blink.ino b/multitasking/millis/zapper/blink/blink.ino
deleted file mode 100644
index 9d52db1..0000000
--- a/multitasking/millis/zapper/blink/blink.ino
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
-  Blink v1
-
-  Accensione e spegnimanto di un ledA utilizzando variabili
-  per impostare la velocita' del lampeggio.
-  
- */
-
-// Pin 13 ha un led collegato di default 
-int ledA = 6;
-int ledB = 7;
-
-void setup() {                
-  // Inizializziamo il PIN 13 come OUTPUT
-  pinMode(ledA, OUTPUT);     
-  pinMode(ledB, OUTPUT);     
-}
-
-void loop() {
-  // 1st step
-  digitalWrite(ledA, HIGH);   
-  delay(150);              
-  digitalWrite(ledA, LOW);  
-  delay(50);              
-  digitalWrite(ledB, HIGH);   
-  delay(150);              
-  digitalWrite(ledB, LOW);  
-  delay(50);              
-
-  // 2st step
-  digitalWrite(ledA, HIGH);   
-  delay(150);              
-  digitalWrite(ledA, LOW);  
-  delay(50);              
-
-
-  // 3st step
-  delay(150);            
-  digitalWrite(ledA, LOW);  
-  digitalWrite(ledB, LOW);  
-  delay(50);            
-  digitalWrite(ledA, HIGH);   
-  digitalWrite(ledB, HIGH);   
-  delay(350);              
-  digitalWrite(ledA, LOW);  
-  digitalWrite(ledB, LOW);  
-  delay(50);            
-
-
-  // Reverse
-  // 1st step
-  digitalWrite(ledB, HIGH);   
-  delay(150);              
-  digitalWrite(ledB, LOW);  
-  delay(50);              
-  digitalWrite(ledA, HIGH);   
-  delay(150);              
-  digitalWrite(ledA, LOW);  
-  delay(50);              
-
-  // 2st step
-  digitalWrite(ledB, HIGH);   
-  delay(150);              
-  digitalWrite(ledB, LOW);  
-  delay(50);              
-
-
-  // 3st step
-  delay(150);            
-  digitalWrite(ledB, LOW);  
-  digitalWrite(ledA, LOW);  
-  delay(50);            
-  digitalWrite(ledB, HIGH);   
-  digitalWrite(ledA, HIGH);   
-  delay(350);              
-  digitalWrite(ledB, LOW);  
-  digitalWrite(ledA, LOW);  
-  delay(50);            
-
-
-}
-
diff --git a/programming/loops/loop_2_for_each/loop_2_for_each.ino b/programming/loops/loop_2_for_each/loop_2_for_each.ino
new file mode 100644
index 0000000..f9aba07
--- /dev/null
+++ b/programming/loops/loop_2_for_each/loop_2_for_each.ino
@@ -0,0 +1,25 @@
+/*
+     For Each Iteration
+
+    Il costrutto for each fa parte delle specifiche di C++11
+    abilitate di default nella Arduino IDE dalla versione 1.6.6.
+
+    Se state usando una versione piu' vecchia dell'IDE
+    il codice non compilera', se avete comunque le GCC >= 4.7
+    potete abilitare c++11 con i flag -std=c++11 :
+   https://stackoverflow.com/questions/16224746/how-to-use-c11-to-program-the-arduino
+*/
+
+byte valori[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+
+void setup()
+{
+  Serial.begin(9600);
+}
+
+void loop() {
+  for (int val: valori)  {
+    Serial.println(val);
+    delay(100);
+  }
+}