From 09c59da3c295d0d30588602930ff9772c08d544e Mon Sep 17 00:00:00 2001
From: eaman <andrea@piffa.net>
Date: Tue, 10 Jan 2017 01:00:06 +0100
Subject: [PATCH] RTOS

---
 .gitignore                                    |   1 +
 basic/pwm/pmw_5_coseno/pmw_5_coseno.ino       |  35 ++++++
 .../blink_10_freeRTOS/blink_10_freeRTOS.ino   | 103 ++++++++++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 basic/pwm/pmw_5_coseno/pmw_5_coseno.ino
 create mode 100644 multitasking/blink_10_freeRTOS/blink_10_freeRTOS.ino

diff --git a/.gitignore b/.gitignore
index eaa5cc6..4dffdc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ libraries/aero/
 *Makefile
 *tags
 libraries/LedControl/
+libraries/FreeRTOS/
diff --git a/basic/pwm/pmw_5_coseno/pmw_5_coseno.ino b/basic/pwm/pmw_5_coseno/pmw_5_coseno.ino
new file mode 100644
index 0000000..91f9214
--- /dev/null
+++ b/basic/pwm/pmw_5_coseno/pmw_5_coseno.ino
@@ -0,0 +1,35 @@
+/*
+ * PWM coseno
+ * 
+ * PWM up & down utilizzando il coseno
+ * senza delay()
+ * 
+ * Maggiore tempo con poca / massima luminosita'.
+ */
+
+int value, value2 ;
+int ledpin = 10;                           // light connected to digital pin 10
+int ledpin2 = 11;                           // light connected to digital pin 11
+long time=0;
+
+int periode = 2000;
+int displace = 500;
+
+void setup()
+{
+ // nothing for setup
+}
+
+void loop()
+{
+ time = millis();
+ value = 128+127*cos(2*PI/periode*time);
+ value2 = 128+127*cos(2*PI/periode*(displace-time));
+ analogWrite(ledpin, value);           // sets the value (range from 0 to 255)
+ analogWrite(ledpin2, value2);           // sets the value (range from 0 to 255)
+}
+
+/* Esercizi:
+ 1.Fare un script analogo utilizzano la funzione map().
+ 2.Fare un script analogo utilizzano millis e (float).
+ */
diff --git a/multitasking/blink_10_freeRTOS/blink_10_freeRTOS.ino b/multitasking/blink_10_freeRTOS/blink_10_freeRTOS.ino
new file mode 100644
index 0000000..91a8f97
--- /dev/null
+++ b/multitasking/blink_10_freeRTOS/blink_10_freeRTOS.ino
@@ -0,0 +1,103 @@
+#include <Arduino_FreeRTOS.h>
+/* E' necessario installare la libreria: Arduino_FreeRTOS
+- https://github.com/feilipu/Arduino_FreeRTOS_Library
+- https://www.hackster.io/feilipu/using-freertos-multi-tasking-in-arduino-ebc3cc
+*/
+// define two tasks for Blink & AnalogRead
+void TaskFirstBlink( void *pvParameters );
+void TaskSecondBlink( void *pvParameters );
+
+// the setup function runs once when you press reset or power the board
+void setup() {
+  
+  // initialize serial communication at 9600 bits per second:
+  Serial.begin(9600);
+  
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB, on LEONARDO, MICRO, YUN, and other 32u4 based boards.
+  }
+
+  // Now set up two tasks to run independently.
+  xTaskCreate(
+    TaskFirstBlink
+    ,  (const portCHAR *)"First Blink"   // A name just for humans
+    ,  128  // This stack size can be checked & adjusted by reading the Stack Highwater
+    ,  NULL
+    ,  2  // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
+    ,  NULL );
+
+  xTaskCreate(
+    TaskSecondBlink
+    ,  (const portCHAR *) "Sec Blink"
+    ,  128  // Stack size
+    ,  NULL
+    ,  1  // Priority
+    ,  NULL );
+
+  // Now the task scheduler, which takes over control of scheduling individual tasks, is automatically started.
+}
+
+void loop()
+{
+  // Empty. Things are done in Tasks.
+}
+
+/*--------------------------------------------------*/
+/*---------------------- Tasks ---------------------*/
+/*--------------------------------------------------*/
+
+void TaskFirstBlink(void *pvParameters)  // This is a task.
+{
+  (void) pvParameters;
+
+/*
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+
+  Most Arduinos have an on-board LED you can control. On the UNO, LEONARDO, MEGA, and ZERO 
+  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN takes care 
+  of use the correct LED pin whatever is the board used.
+  
+  The MICRO does not have a LED_BUILTIN available. For the MICRO board please substitute
+  the LED_BUILTIN definition with either LED_BUILTIN_RX or LED_BUILTIN_TX.
+  e.g. pinMode(LED_BUILTIN_RX, OUTPUT); etc.
+  
+  If you want to know what pin the on-board LED is connected to on your Arduino model, check
+  the Technical Specs of your board  at https://www.arduino.cc/en/Main/Products
+  
+  This example code is in the public domain.
+
+  modified 8 May 2014
+  by Scott Fitzgerald
+  
+  modified 2 Sep 2016
+  by Arturo Guadalupi
+*/
+
+  // initialize digital LED_BUILTIN on pin 13 as an output.
+  pinMode(LED_BUILTIN, OUTPUT);
+const int pausa = 500;
+
+  for (;;) // A Task shall never return or exit.
+  {
+    digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
+    vTaskDelay( pausa / portTICK_PERIOD_MS ); // wait for one second
+    digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
+    vTaskDelay( pausa / portTICK_PERIOD_MS ); // wait for one second
+  }
+}
+
+void TaskSecondBlink(void *pvParameters)  // This is a task.
+{
+  (void) pvParameters;
+  
+pinMode(3, OUTPUT);
+const int pausa = 1000;
+  for (;;) // A Task shall never return or exit.
+  {
+    digitalWrite(3, HIGH);   // turn the LED on (HIGH is the voltage level)
+    vTaskDelay( pausa / portTICK_PERIOD_MS ); // wait for one second
+    digitalWrite(3, LOW);    // turn the LED off by making the voltage LOW
+    vTaskDelay( pausa / portTICK_PERIOD_MS ); // wait for one second
+  }
+}
-- 
2.39.2