/*********
  Markus Pfeil
  Added RTOS Part

/* Define the traceTASK_SWITCHED_IN() and *_OUT() macros become HIGH when the tasks is switched in, and low w
when switched out. This has to be done in the RTOS Library. */

//#define traceTASK_SWITCHED_IN() digitalWrite( (int)pxCurrentTCB->pxTaskTag, HIGH )
//#define traceTASK_SWITCHED_OUT() digitalWrite((int)pxCurrentTCB->pxTaskTag, LOW )

/* Define the pin on which the tasks is being monitored (to be put in each task) */ /*modified by Markus Pfeil*/
/* vTaskSetApplicationTaskTag( NULL, ( void * )data.debug_pin); 

  based on 
  Rui Santos
  Complete project details at https://randomnerdtutorials.com  
  Project code: https://randomnerdtutorials.com/esp32-i2c-communication-arduino-ide/#2
*********/

#include <Wire.h>

#include <Arduino_FreeRTOS.h>
#include <semphr.h>
#include <queue.h>

#include <RTClib.h>

// Initialize DS1307RTC
RTC_DS1307 rtc;

//The use of Task Handles
TaskHandle_t TaskHandle_1; 
TaskHandle_t TaskHandle_2; 

void Task1(void *pvParameters);
void Task2(void *pvParameters);

void setup() {
  Wire.begin();
  Serial.begin(115200);
  Serial.println("\nI2C Scanner");

//this will create the scanner Task
xTaskCreate(Task1, "Scanner", 128, NULL, 1, &TaskHandle_1);
// this will set the RTC
xTaskCreate(Task2, "Real_Time_Clock", 128, NULL, 3, &TaskHandle_2);
// where the real time clock initiates 
rtc.begin();
}
 
//This Task is scanning the devices
void Task1(void *pvParameters) {
  vTaskSetApplicationTaskTag( NULL, ( void * )12);
  //waiting a bit so we can actually see it switch in once...otherwise the first activation is missed as the taskTag is not yet defined)
  vTaskDelay(pdMS_TO_TICKS(10));

  byte error, address;
  int nDevices;
  Serial.println("Scanning...");
  nDevices = 0;
  for(address = 1; address < 127; address++ ) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address<16) {
        Serial.print("0");
      }
      Serial.println(address,HEX);
      nDevices++;
    }
    else if (error==4) {
      Serial.print("Unknown error at address 0x");
      if (address<16) {
        Serial.print("0");
      }
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0) {
    Serial.println("No I2C devices found\n");
  }
  else {
    Serial.println("done\n");
  }
      
  vTaskDelete(NULL);     
}
//This Tasks is display the real time clock
void Task2(void *pvParameters) {
  vTaskSetApplicationTaskTag( NULL, ( void * )11);
  for(;;) {
       
      DateTime now = rtc.now();

      Serial.print(now.year(), DEC);
      Serial.print("/");
      Serial.print("0");
      Serial.print(now.month(), DEC);
      Serial.print("/");
      Serial.print("0");
      Serial.print(now.day(), DEC);
      Serial.print(" ");
      Serial.print(now.hour(), DEC);
      Serial.print(":");
      Serial.print(now.minute(), DEC);
      Serial.print(":");
      Serial.print(now.second(), DEC);
      Serial.println();
      vTaskDelay(pdMS_TO_TICKS(500)); 
  }
}


void loop() {
 //Empty
}