bussola

diff --git a/hardware/bussola/hmc5883l_i2c/hmc5883l_i2c.ino b/hardware/bussola/hmc5883l_i2c/hmc5883l_i2c.ino
new file mode 100644 (file)
index 0000000..6b67c58
--- /dev/null
+++ b/hardware/bussola/hmc5883l_i2c/hmc5883l_i2c.ino
@@ -0,0 +1,75 @@
+/*
+An Arduino code example for interfacing with the HMC5883
+
+by: Jordan McConnell
+ SparkFun Electronics
+ created on: 6/30/11
+ license: OSHW 1.0, http://freedomdefined.org/OSHW
+
+Analog input 4 I2C SDA
+Analog input 5 I2C SCL
+
+Link: https://www.sparkfun.com/tutorials/301
+Datasheet e registri: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Magneto/HMC5883L-FDS.pdf
+*/
+
+#include <Wire.h> //I2C Arduino Library
+
+#define address 0x1E //0011110b, I2C 7bit address of HMC5883
+
+void setup(){
+  //Initialize Serial and I2C communications
+  Serial.begin(9600);
+  Wire.begin();
+  
+  //Put the HMC5883 IC into the correct operating mode
+  Wire.beginTransmission(address); //open communication with HMC5883
+  Wire.write(0x00); //select mode Measurement Configuration Bits
+  Wire.write(0x70); // 8 -average, 15 Hz default, normal measuremen
+  Wire.write(0x02); //select mode register
+  Wire.write(0x00); //continuous measurement mode
+  Wire.endTransmission();
+}
+
+void loop(){
+  
+  int x,y,z; //triple axis data
+
+  //Tell the HMC5883 where to begin reading data
+  Wire.beginTransmission(address);
+  Wire.write(0x03); //select register 3, X MSB register
+  Wire.endTransmission();
+  
+ 
+ //Read data from each axis, 2 registers per axis
+  Wire.requestFrom(address, 6);
+  if(6<=Wire.available()){
+    x = Wire.read()<<8; //X msb
+    x |= Wire.read(); //X lsb
+    z = Wire.read()<<8; //Z msb
+    z |= Wire.read(); //Z lsb
+    y = Wire.read()<<8; //Y msb
+    y |= Wire.read(); //Y lsb
+  }
+  
+  //Print out values of each axis
+  Serial.print("x: ");
+  Serial.print(x);
+  Serial.print("  y: ");
+  Serial.print(y);
+  Serial.print("  z: ");
+  Serial.print(z);
+  // Calcolo cotangente per gradi: https://it.wikipedia.org/wiki/Arcotangente2
+  float radianti = atan2(x,y)  ;
+  if (radianti < 0) {// Se y e'antiorario il segno e' inverso
+    radianti += 2 * PI ; // inverte il segno
+}
+  
+ float gradi = radianti * 180 / PI; // Conversione in gradi
+ gradi += 2.56 ; // Correzione per la declinazione magnetica locale
+ // Modena dovrebbe essere a +2° 34' positivi EST
+  Serial.print("  gradi: ");
+  Serial.println(gradi);
+  
+  delay(250);
+}

diff --git a/hardware/bussola/magsensor/magsensor.ino b/hardware/bussola/magsensor/magsensor.ino
index a414f7f0564c165697a92ff8b787411cc693d31e..d6ac1afb4e281073d10e99a264551152ed032032 100644 (file)
--- a/hardware/bussola/magsensor/magsensor.ino
+++ b/hardware/bussola/magsensor/magsensor.ino
@@ -76,7 +76,7 @@ void setup(void)
   displaySensorDetails();
 }
 
-void loop(void) 
+void loop() 
 {
   /* Get a new sensor event */ 
   sensors_event_t event; 

diff --git a/multitasking/BlinkWithoutDelay_6_class/BlinkWithoutDelay_6_class.ino b/multitasking/BlinkWithoutDelay_6_class/BlinkWithoutDelay_6_class.ino
index 2744341276d41b6555a52f65000e779f90e57e39..fa55a1b6f683008ef22550270d008a4ba30ddbd4 100644 (file)
--- a/multitasking/BlinkWithoutDelay_6_class/BlinkWithoutDelay_6_class.ino
+++ b/multitasking/BlinkWithoutDelay_6_class/BlinkWithoutDelay_6_class.ino
@@ -42,8 +42,8 @@ public:
 };
 
 // Instanziamo i due led dalla classe 
-Lampeggiatore ledA(13, 1000);
-Lampeggiatore ledB(12, 500);
+Lampeggiatore ledA(1, 1000);
+Lampeggiatore ledB(2, 500);
 
 void setup() {
 }

diff --git a/serial/i2c/master_writer_1/master_writer_1.ino b/serial/i2c/master_writer_1/master_writer_1.ino
index 4692b52ec11e387e327a722cb3b141fd2c122b8b..4af9aaa7344121731cbbd3afac766960ee896af0 100644 (file)
--- a/serial/i2c/master_writer_1/master_writer_1.ino
+++ b/serial/i2c/master_writer_1/master_writer_1.ino
@@ -12,22 +12,15 @@ Invio dati via I2C
 
 void setup()
 {
-  Wire.begin(); // join i2c bus (address optional for master)
+  Wire.begin(); // Entra sul canale I2C come master
 }
 
 byte x = 0;
 
 void loop()
 {
-  //  Wire.beginTransmission(4); // transmit to device #4
-  //  Wire.write("DAto inviato dal master");        // sends five bytes
-  //
-  //  Wire.endTransmission();    // stop transmitting
-  //
-  //
-  //  delay(500);
-  Wire.beginTransmission(4); // transmit to device #4
-  Wire.write("Tora Tora!");        // sends five bytes
+  Wire.beginTransmission(4); //Trasmette al device  #4
+  Wire.write("Tora Tora!");        
   // sends one byte  
   Wire.endTransmission();    // stop transmitting
 

diff --git a/serial/i2c/slave_receiver_1/slave_receiver_1.ino b/serial/i2c/slave_receiver_1/slave_receiver_1.ino
index 34040d6954b53dabf20b1a3d0abc747b628dc374..2222c43a2f8d7d8297aba8bf796d05258263e939 100644 (file)
--- a/serial/i2c/slave_receiver_1/slave_receiver_1.ino
+++ b/serial/i2c/slave_receiver_1/slave_receiver_1.ino
@@ -13,9 +13,10 @@ char input ;
 
 void setup()
 {
-  Wire.begin(4);                // join i2c bus with address #4
-  Wire.onReceive(receiveEvent); // register event
-  
+  Wire.begin(4);                // Entra sul canale I2C come slave  ID 4
+  Wire.onReceive(receiveEvent); // Al verificarsi dell'evento Wire.onReceive
+          // richiama la funzione receiveEvent()
+          
   // Debug seriale
   Serial.begin(9600);           // start serial for output
   Serial.println("Slave / RX Debug:");
@@ -24,22 +25,21 @@ void setup()
 
 void loop()
 {
-
   delay(100);
-// Nel Loop non succede niente, tutta l'azione e nella funzione receiveEvent()
+// Nel Loop non succede niente, tutta l'azione e' nella funzione receiveEvent()
 // Innescata dall'evento Wire.onReceive
 }
 
-// function that executes whenever data is received from master
-// this function is registered as an event, see setup()
+// Funzioni
 void receiveEvent(int howMany)
+// Eseguita ogni volta che si riceve dati dal Master
 {
-  Serial.print("Lo slave ha ricevuto il seguente messaggio: ");
-  while( Wire.available()) // loop through all but the last
+  Serial.print("Lo slave ha ricevuto il seguente messaggio: \"");
+  while ( Wire.available()) // Scansiona tutti i dati ricevuti
   {
     input = Wire.read(); // receive byte as a character
     Serial.print(input);         // print the character
   }         // print the integer
-  Serial.println("");
+  Serial.println("\""); // \ e' l'escape character
 }