/*************************************************** 
Project to data log 4 ThermoCouple channels onto an SD card
Using Adafruit MAX31855 Breakout Boards for the TC's and an SD Card Sheild
Code for Arduino MEGA 2560
/****************************************************/

#include <MAX31855.h>
#include <Wire.h>
#include <RTClib.h>
#include <SdFat.h>

RTC_DS1307 RTC; // Real Time Clock Object
DateTime now;  // Link Date & Time to Current PC time
SdFat sd; // SD Card Object
SdFile logfile; // SD Card Logfile Object

//Setup SPI Pins
int ChipSelect1 = 4; //Thermocouple #1
int ChipSelect2 = 5; //Thermocouple #2
int ChipSelect3 = 6; //Thermocouple #3
int ChipSelect4 = 7; //Thermocouple #4
int ChipSelect5 = 8; //SD Card Shield
int SlaveIn = 51; //MOSI set by default
int SlaveOut = 50; //MISO set by default
int SCLK = 52; //set by default

MAX31855 thermocouple1(SlaveOut, ChipSelect1, SCLK);
MAX31855 thermocouple2(SlaveOut, ChipSelect2, SCLK);
MAX31855 thermocouple3(SlaveOut, ChipSelect3, SCLK);
MAX31855 thermocouple4(SlaveOut, ChipSelect4, SCLK);
  
void setup() {
  Serial.begin(9600);
  while (!Serial) {}  // wait for input
  Serial.println("Waiting....");
  Serial.println("Type any character to start");
  while (Serial.read() <= 0) {}
  delay(500);  // Allow MAX31855 Amps to Start Up 
  Wire.begin();
  RTC.begin();
  RTC.adjust(DateTime(__DATE__, __TIME__));// Reset real-time clock to current date & time
  Serial.println("Startup Complete");
  delay(500);
  
  // Initialize SdFat or print a detailed error message and halt
  // Use half speed like the native library.
  // change to SPI_FULL_SPEED for more performance.
  
//  Serial.println("Initalizing SD Card");
//  delay(400);
//  if (!sd.begin(ChipSelect5, SPI_HALF_SPEED) {
//    Serial.println("SD Card error");
// } else {
//    Serial.println("SD Card Initialized");
//  }
//  delay(400);
//  Serial.println("Starting Program Loop");
}

void loop() {
    double c1 = thermocouple1.readThermocouple(CELSIUS);
    double c2 = thermocouple2.readThermocouple(CELSIUS);
    double c3 = thermocouple3.readThermocouple(CELSIUS);
    double c4 = thermocouple4.readThermocouple(CELSIUS);
    DateTime now = RTC.now();
    Serial.println();
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    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();
    Serial.print("C1 = "); 
    Serial.println(c1);
    Serial.print("C2 = "); 
    Serial.println(c2);
    Serial.print("C3 = "); 
    Serial.println(c3);
    Serial.print("C4 = "); 
    Serial.println(c4);
    delay(1000);
}