#include "RTClib.h"
#include <SPI.h>

// #define SPI_CLK      13  // Implicit
// #define SPI_Data     11  // Implicit
#define SPI_OutLatch 10
#define SPI_InLatch   9

RTC_DS1307 rtc;

const char daysOfTheWeek[7][9] = { "Dimanche", "Lundi", "Mardi", "Mercredi", "Jeudi", "Vendredi", "Samedi" };
const char monthOfYear[12][10] = { "janvier", "février", "mars", "avril", "mai", "juin", "juillet", "août", "septembre", "octobre", "novembre", "décembre" };

void setup() {
  Serial.begin(115200);

  if (!rtc.begin()) {
    Serial.println(F("Couldn't find RTC"));
    Serial.flush();
    abort();
  }

  // pinMode(SPI_CLK,      OUTPUT);  // Implicit
  // pinMode(SPI_Data,     OUTPUT);  // Implicit
  pinMode(SPI_OutLatch, OUTPUT);
  pinMode(SPI_InLatch,  OUTPUT);

  // initialize SPI:
  SPI.begin();
  SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
}

void loop() {
  static int8_t oldSecs;
  static int16_t LoopCnt;
  static char val[10];
  static int16_t RxData1, RxData2;

  LoopCnt++;
  DateTime now = rtc.now();
  if (oldSecs != now.second()) {
    oldSecs = now.second();
    Serial.print(F("Loop Count: "));
    Serial.print(LoopCnt);
    Serial.print(" - ");
    LoopCnt = 0;
    Serial.print(F("Current time: "));
    sprintf(val, "%04d", now.year());
    Serial.print(val);
    Serial.print('/');
    sprintf(val, "%02d", now.month());
    Serial.print(val);
    Serial.print('/');
    sprintf(val, "%02d", now.day());
    Serial.print(val);
    sprintf(val, " %02d", now.hour());
    Serial.print(val);
    Serial.print(':');
    sprintf(val, "%02d", now.minute());
    Serial.print(val);
    Serial.print(':');
    sprintf(val, "%02d", now.second());
    Serial.print(val);
    Serial.print(" (");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(" ");
    Serial.print(now.day());
    Serial.print(" ");
    Serial.print(monthOfYear[now.month() - 1]);
    Serial.print(" ");
    Serial.print(now.year());
    Serial.println(") ");
    Serial.flush();
  }

  digitalWrite( SPI_InLatch, HIGH);
  digitalWrite(SPI_OutLatch, LOW);
  RxData1 = SPI.transfer(RxData1);
  digitalWrite(SPI_OutLatch, HIGH);
  digitalWrite(SPI_OutLatch, LOW);
  RxData2 = SPI.transfer(RxData1);
  digitalWrite(SPI_OutLatch, HIGH);
  digitalWrite( SPI_InLatch, LOW);
  Serial.println(RxData1, BIN);
  Serial.println(RxData2, BIN);
  Serial.println();
  Serial.flush();
}