/*
   Example of a FreeRTOS mutex
   https://www.freertos.org/Real-time-embedded-RTOS-mutexes.html
*/

// Include Arduino FreeRTOS library
#include <Arduino_FreeRTOS.h>


// Include mutex support
#include <semphr.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address of the LCD

struct SensorData {
  int ldr1;
  int ldr2;
};

SemaphoreHandle_t mutex; // Declare the mutex globally
SensorData sensorValues;
/*
   Declaring a global variable of type SemaphoreHandle_t

*/

int globalCount = 0;

void setup() {

  Serial.begin(9600);
Wire.begin();
  lcd.init();
  lcd.backlight();
  /**
       Create a mutex.
       https://www.freertos.org/CreateMutex.html
  */
  mutex = xSemaphoreCreateMutex();
  if (mutex != NULL) {
    Serial.println("Mutex created");
  }

  /**
     Create tasks
  */
 xTaskCreate(TaskLDR, "LDR_Task", 128, NULL, 1, NULL);
  xTaskCreate(TaskLCD, "LCD_Task", 128, NULL, 1, NULL);

}

void loop() {}

void TaskLDR(void *pvParameters) {
  for (;;) {
    // Simulate reading LDR values (replace with actual readings)
    int ldr1Value = analogRead(A0);
    int ldr2Value = analogRead(A1);

    if (xSemaphoreTake(mutex, 10) == pdTRUE) {
      sensorValues.ldr1 = ldr1Value;
      sensorValues.ldr2 = ldr2Value;
      xSemaphoreGive(mutex);
    }

    vTaskDelay(1000 / portTICK_PERIOD_MS);
  }
}

void TaskLCD(void *pvParameters) {
  for (;;) {
    if (xSemaphoreTake(mutex, 10) == pdTRUE) {
      lcd.setCursor(0, 0);
      lcd.print("LDR1: ");
      lcd.print(sensorValues.ldr1);

      lcd.setCursor(0, 1);
      lcd.print("LDR2: ");
      lcd.print(sensorValues.ldr2);

      xSemaphoreGive(mutex);
    }

    vTaskDelay(1000 / portTICK_PERIOD_MS);
  }
}