11/18

這次課程助教介紹了arduino裡面的函式庫功能，也就像是chrome裡面的擴充功能，需要什麼額外的功能時可以自己下載，在網路上的github也有很多範例可以用。

利用Arduino來記錄時間

下載DS1302跟TM1637這兩個函數，DS1302利用arduino程式庫管理員找到

內管理程式庫Rtc by Makuna 直接在Arduino程式管理員下載就可以了，TM1637在Arduino程式管理員上沒有所以要自己下載並且安裝

TM1637的GitHub頁面 

TM1637函式庫直接下載

#include <Wire.h>

#include <ThreeWire.h>

#include <RtcDS1302.h>

ThreeWire myWire(A3, A4, A5); //接腳: DAT/IO, SCLK/CLK, RST/CE (DS1302的接線自行更改)

RtcDS1302<ThreeWire> Rtc(myWire);

void setup ()

{

  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 ()

{

  RtcDateTime now = Rtc.GetDateTime();

  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!");

  }

  delay(10000); // 10秒更新一次

}

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

//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);

}

#include <ThreeWire.h>

#include <RtcDS1302.h>

#include <TM1637Display.h>

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

#define CLK 11

#define DIO 12

TM1637Display display(CLK, DIO);

ThreeWire myWire(7, 6, 5); //接腳: DAT/IO, SCLK/CLK, RST/CE (DS1302的接線自行更改)

RtcDS1302<ThreeWire> Rtc(myWire);

void setup()

{

    Serial.begin(9600);//鮑率57600

    display.setBrightness(7);

    Serial.print("compiled: ");

    Serial.print(__DATE__);

    Serial.println(__TIME__);

    Rtc.Begin();

    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);

    printDateTime(compiled);

    Serial.println();

    if (!Rtc.IsDateTimeValid())

    {

        // Common Causes:

        //    1) 第一次使用但設備還沒跑好

        //    2) 電池電量低

        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)");

        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()

{

    RtcDateTime now = Rtc.GetDateTime();

    printDateTime(now);//呼叫副函數

    Serial.println();

    if (!now.IsValid())

    {

        // Common Causes:

        //    1) the battery on the device is low or even missing and the power line was disconnected

        Serial.println("RTC lost confidence in the DateTime!");

    }

}

void printDateTime(const RtcDateTime &dt)

{

    char datestring[20];

    snprintf_P(datestring,

               countof(datestring),

               PSTR("%02u/%02u/%04u %02u:%02u:%02u"),

               dt.Month(),//月

               dt.Day(),//日

               dt.Year(),//年

               dt.Hour(),//小時

               dt.Minute(),//分鐘

               dt.Second());//秒

    Serial.println(dt.Minute());

    display.showNumberDecEx(dt.Hour(), 0b11100000, 2, 2); //前兩位數設定為小時

    display.showNumberDecEx(dt.Minute(), 0b11100000, true, 2, 2); //後兩位數設定為分鐘

    delay(1000);

}

其實第二個只是接個顯示器上去而已