Arduino時鐘
Arduino時鐘
前言
Arduino本身不具備時間記錄功能，若需此功能則必須借助其他模組。DS1302模組是常用於時間記錄的選擇，搭配程式庫使用即可輕鬆實現，並可透過一個簡易的顯示螢幕來完成時鐘功能。
程式庫管理
材料
Arduino UNO版、DS1302模組、TM1637 、麵包板一塊、若干條杜邦線
接線圖:404 NOT FOUND(請自己更改程式碼來接線)
#include <Wire.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>
ThreeWire myWire(A6, A5, A7); //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);
}
加上螢幕的程式就可以當作時鐘來使用
接線圖:404 NOT FOUND(請自己更改程式碼來接線)
#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);
}
也可以自己更改程式碼讓螢幕顯示日期這就讓你們自己去嘗試