#include <Arduino_FreeRTOS.h>
#include <LiquidCrystal.h>


LiquidCrystal lcd (7,6,5,4,3,2);//RS,E,D4,D5,D6,D7
#include<queue.h>
//define a struct
struct pinRead
{
  int pin;//analog channel identifier
  int value;//sensor output value
  
};
//This lines defines the handler for struct Queue to access it for tasks reference
QueueHandle_t structQueue;
//These two function initializes LCD and UART communication libreary



void setup() 
{
  Serial.begin(9600);
  lcd.begin(16,2);//ENable LCD library
  //create Structure Queue
  structQueue= xQueueCreate(10,//Queue length
                sizeof(struct pinRead)//Queue item size
                );
  if(structQueue!=NULL)
  {
    //create task that consumes the queue if it was created
    xTaskCreate(TaskLCD,//Taskfunction
                "Displaydata",//A name just for humnas
                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
                );
                //Create task that publish data in the queue if it was created.
    xTaskCreate(TaskTempReadPin0,//Task function
                            "AnalogReadPin0",//Task namd=e
                            128,//stack size
                            NULL,1,//Priority
                            NULL);
    xTaskCreate(TaskLightReadPin1,//Task function
                            "AnalogReadPin1",//Task namd=e
                            128,//stack size
                            NULL,1,//Priority
                            NULL);
    

  }
  vTaskStartScheduler();

}

void loop() {
  // put your main code here, to run repeatedly:

}

void TaskTempReadPin0(void* pvParameters)
{
  (void)pvParameters;
  for(;;)
  {

    struct pinRead currentPinRead;//Define a structure of type pinRead
    currentPinRead.pin=0;//assign value '0' to pin element of struct
    currentPinRead.value=analogRead(A0);///Read adc value from A0 channel and
    //store in value element of struct
    xQueueSend(structQueue,&currentPinRead,portMAX_DELAY);//write struct message to queue
    Serial.println("Channel_0");
    taskYIELD();//terminate the task and inform schudler about it

  }
}

void TaskLightReadPin1(void* pvParameters)
{
  (void) pvParameters;
  for(;;)
  {
    struct pinRead currentPinRead;//define a structure of type pinRead
    currentPinRead.pin=1;//assign value'1' to pin element of struct
    currentPinRead.value=analogRead(A1);
    //Read adc value from A1 channel and store it in value element of struct
    xQueueSend(structQueue,&currentPinRead,portMAX_DELAY);
    //write struct message in queue
    Serial.println("Channel_1");//print Channel_1 on serial monitor
    taskYIELD();//terminate the task and inform schelduer about it
  }
}

void TaskLCD(void* pvParameters)
{
  (void) pvParameters;
  for(;;)
  {
    int TEMP=0;//temporary variable to hold Temperature adc0 value
    int LDR=0;//temporary variable to hold LDR adc1 value
    struct pinRead currentPinRead;//structure to hold received data
    //Read structure element from queue and check if data received successfully

    if(xQueueReceive(structQueue,&currentPinRead,portMAX_DELAY)==pdPASS)
    {
        Serial.print("Pin: ");
        Serial.print(currentPinRead.pin);
        Serial.print("Value: ");
        Serial.println(currentPinRead.value);
        
        //if condition checks if data receive from channel zero
        //if, yes store sensor value member of structure in temporeary temp variable


      
      if(currentPinRead.pin==0)
      {
        TEMP =(currentPinRead.value *500)/1024;//convert adc value into temperature
        ///display 
        lcd.setCursor(0,0);
        lcd.print("Temp= ");
        lcd.setCursor(7,0);
        lcd.print(TEMP);
        lcd.print("C");
      }
      //if condition checks if data receive from channel one A1
      //if yes, store sensor value member of structure in temporeary LDR variable

      if(currentPinRead.pin==1)
      {
        LDR=map(currentPinRead.value,0,1023,0,255);//map ADC1 value to light value
        //display light dependent resistor output in first line of 16x2 LCD
        lcd.setCursor(0,1);
        lcd.print("LIGHT=");
        lcd.setCursor(7,1);
        lcd.print(LDR);
        lcd.print("LUX");
      }
    }
    taskYIELD();//terminate the task and inform schuler about it
  
  }
}