/*
 * File:   main.c
 * Author: Sebastian H. Gabrielli, Helle Augland Grasmo, Ina Min Rørnes
 *
 * Created on March 6, 2024, 12:34 PM
 */
#define F_CPU 4E6

// Include AVR specific libs
#include <avr/interrupt.h>
#include <avr/io.h>
#include <util/delay.h>

// Include standard C libraries
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

// Include custom source files
#include "eeprom.h"
#include "voltage.h"
#include "command-handler.h"
#include "i2c.h"
#include "themistor-temp.h"
#include "fan-speed.h"

// Only enable UART when required for debugging
#ifdef ENABLE_UART
#include "uart.h"
#endif

// Fan history variables
volatile uint16_t fan1_history[512] = {0};
volatile uint16_t fan2_history[512] = {0};
// Fan history index variable
volatile uint16_t fan1_history_index = 0;
volatile uint16_t fan2_history_index = 0;

// Default config is 500ms sample rate
volatile config_t config = {500};
volatile bool store_config = false;

int main() {
  // Initialize functionality
  ADC0_init();
  init_alarm_gpio();
  init_i2c();
  
  // Fanspeed
  init_AC0();
  init_AC1();
  init_TCA0();
  TCA0_update_period(config.ms_fanspeed_sample_rate);
  
  // Only enable UART when required for debugging
#ifdef ENABLE_UART
  init_uart((uint16_t)9600);
  stdout = &USART_stream;
#endif

  // Read the stored config struct
  config = read_struct_from_EEPROM();

  // Enable interrupts
  sei();

  while (1) {
    // If we have made a config change, store it and recalculate the period.
    if (store_config) {
      TCA0_update_period(config.ms_fanspeed_sample_rate);
      write_struct_from_EEPROM(config);
      store_config = false;
    }
  }
}