#include <TM1637Display.h>

#include <Wire.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>


#define CLK 4
#define DIO 5

TM1637Display display(CLK, DIO);

ThreeWire myWire(9, 10, 8); // IO, SCLK, CE
RtcDS1302<ThreeWire> Rtc(myWire);

// Data from Animator Tool
const uint8_t ANIMATION[12][4] = {
  { 0x08, 0x00, 0x00, 0x00 },  // Frame 0
  { 0x00, 0x08, 0x00, 0x00 },  // Frame 1
  { 0x00, 0x00, 0x08, 0x00 },  // Frame 2
  { 0x00, 0x00, 0x00, 0x08 },  // Frame 3
  { 0x00, 0x00, 0x00, 0x04 },  // Frame 4
  { 0x00, 0x00, 0x00, 0x02 },  // Frame 5
  { 0x00, 0x00, 0x00, 0x01 },  // Frame 6
  { 0x00, 0x00, 0x01, 0x00 },  // Frame 7
  { 0x00, 0x01, 0x00, 0x00 },  // Frame 8
  { 0x01, 0x00, 0x00, 0x00 },  // Frame 9
  { 0x20, 0x00, 0x00, 0x00 },  // Frame 10
  { 0x10, 0x00, 0x00, 0x00 }   // Frame 11
};

const uint8_t ERROR[4] = {
  SEG_A | SEG_F | SEG_G | SEG_E | SEG_D, //E
  SEG_G | SEG_E, //r
  SEG_G | SEG_E, //r
  SEG_G | SEG_E | SEG_C | SEG_D //o
};

void setup() {
  // put your setup code here, to run once:\
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);

  display.setBrightness(0x0f);
  for (int i=0; i<12; i++) {
    display.setSegments(ANIMATION[i]);
    delay(100);
  }
  for (int i=0; i<12; i++) {
    display.setSegments(ANIMATION[i]);
    delay(100);
  }

  Serial.begin(9600);

  Serial.print("compiled: ");
  Serial.print(__DATE__);
  Serial.println(__TIME__);

  Rtc.Begin();

  //__DATE__，__TIME__，是程式碼編譯時的日期和時間
  RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
  printDateTime(compiled);
  Serial.println();

  //判斷DS1302是否接好
  if (!Rtc.IsDateTimeValid())
  {
    // Common Causes:
    //    1) first time you ran and the device wasn't running yet
    //    2) the battery on the device is low or even missing

    Serial.println("RTC lost confidence in the DateTime!");
    Rtc.SetDateTime(compiled);
  }

  if (Rtc.GetIsWriteProtected())
  {
    Serial.println("RTC was write protected, enabling writing now");
    Rtc.SetIsWriteProtected(false);
  }

  if (!Rtc.GetIsRunning())
  {
    Serial.println("RTC was not actively running, starting now");
    Rtc.SetIsRunning(true);
  }

  //判斷DS1302上紀綠的時間和編譯時的時間，哪個比較新
  //如果編譯時間比較新，就進行設定，把DS1302上的時間改成新的時間
  //now：DS1302上紀綠的時間，compiled：編譯時的時間
  RtcDateTime now = Rtc.GetDateTime();
  if (now < compiled)
  {
    Serial.println("RTC is older than compile time!  (Updating DateTime)");
    //編譯時間比較新，把DS1302上的時間改成編譯的時間
    Rtc.SetDateTime(compiled);
  }
  else if (now > compiled)
  {
    Serial.println("RTC is newer than compile time. (this is expected)");
  }
  else if (now == compiled)
  {
    Serial.println("RTC is the same as compile time! (not expected but all is fine)");
  }

}

void loop() {
  // put your main code here, to run repeatedly:
  RtcDateTime now = Rtc.GetDateTime();
  
  
  int t = now.Hour() * 100 + now.Minute();
  display.showNumberDecEx(t,0b01000000,true);
  delay(500);
  display.showNumberDecEx(t,0000000000,true);
  delay(500);
  
  // delay(500);
  // display.setSegments(ERROR);
  // delay(500);

  printDateTime(now);
  Serial.println();

  //判斷DS1302是否正常，如果不正常，一般是線沒接好，或是電池沒電了
  if (!now.IsValid())
  {
    Serial.println("RTC lost confidence in the DateTime!");
    display.setSegments(ERROR);
  }

  // delay(10000);
}

#define countof(a) (sizeof(a) / sizeof(a[0]))

uint8_t data[4];

//顯示完整年月日時間的副程式  
void printDateTime(const RtcDateTime& dt)
{
  char datestring[20];

  snprintf_P(datestring,
             countof(datestring),
             PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
             dt.Month(),
             dt.Day(),
             dt.Year(),
             dt.Hour(),
             dt.Minute(),
             dt.Second() );
  Serial.print(datestring);

}