DS3231 模塊

是一個時鐘模塊，上面包含一個紐扣電池位置，可以在主機斷電的情況下還可以繼續計算時間，以便以后記錄使用。

模塊參數：
?　　1.尺寸:38mm(長)*22mm(寬)*14mm(高)
?　　2.重量:8g
?　　3.工作電壓:3.3--5.5V
?　　4.時鐘芯片:高精度時鐘芯片DS3231
?　　5.時鐘精度:0-40℃范圍內,精度2ppm,年誤差約1分鐘
?　　6.帶2個日歷鬧鐘
?　　7.可編程方波輸出
?　　8.實時時鐘產生秒、分、時、星期、日期、月和年計時，并提供有效期到2100年的閏年補償
?　　9.芯片內部自帶溫度傳感器,精度為±3℃
?　　10.存儲芯片:AT24C32(存儲容量32K)
?　　11.IIC總線接口,最高傳輸速度400KHz(工作電壓為5V時)
?　　12.可級聯其它IIC設備,24C32地址可通過短路A0/A1/A2修改,默認地址為0x57
?　　13.帶可充電電池LIR2032,保證系統斷電后,時鐘任然正常走動

實驗效果

通過設定時間的程序后，

我們運行顯示時間的程序，就可以看到時鐘模塊當前的時間了

BOM表

Arduino UNO??? *1

DS3231 時鐘模塊 *1

跳線若干

接線

Arduino ? Uno ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? DS3231

? ? GND ? ? ? ? ? ? ? ? ? ? <---> ? ? ? ? ? ? ? ?GND

? ?5V ? ? ? ? ? ? ? ? ? ? ? ? ?<--->? ? ? ? ? ? ? ? VCC

? ?A4(SDA) ? ? ? ? ? ? ? ? ? ? ? ? ?<--->? ? ? ? ? ? ? ? SDA

? ?A5 (SCL) ? ? ? ? ? ? ? ? ? ? ? ??<--->? ? ? ? ? ? ? ? ?SCL

程序

需要下載庫

http://www.rinkydinkelectronics.com/library.php?id=74

設置時間的程序

// DS3231_Serial_Easy // Copyright (C)2015 Rinky-Dink Electronics, Henning Karlsen. All right reserved // web: http://www.RinkyDinkElectronics.com/ // // A quick demo of how to use my DS3231-library to // quickly send time and date information over a serial link // // To use the hardware I2C (TWI) interface of the Arduino you must connect // the pins as follows: // // Arduino Uno/2009: // ---------------------- // DS3231: SDA pin -> Arduino Analog 4 or the dedicated SDA pin // SCL pin -> Arduino Analog 5 or the dedicated SCL pin // // Arduino Leonardo: // ---------------------- // DS3231: SDA pin -> Arduino Digital 2 or the dedicated SDA pin // SCL pin -> Arduino Digital 3 or the dedicated SCL pin // // Arduino Mega: // ---------------------- // DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA pin // SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL pin // // Arduino Due: // ---------------------- // DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA1 (Digital 70) pin // SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL1 (Digital 71) pin // // The internal pull-up resistors will be activated when using the // hardware I2C interfaces. // // You can connect the DS3231 to any available pin but if you use any // other than what is described above the library will fall back to // a software-based, TWI-like protocol which will require exclusive access // to the pins used, and you will also have to use appropriate, external // pull-up resistors on the data and clock signals. //#include <DS3231.h>// Init the DS3231 using the hardware interface DS3231 rtc(SDA, SCL);void setup() {// Setup Serial connectionSerial.begin(115200);// Uncomment the next line if you are using an Arduino Leonardo//while (!Serial) {}// Initialize the rtc objectrtc.begin();// The following lines can be uncommented to set the date and timertc.setDOW(WEDNESDAY); // Set Day-of-Week to SUNDAYrtc.setTime(12, 0, 0); // Set the time to 12:00:00 (24hr format)rtc.setDate(1, 1, 2014); // Set the date to January 1st, 2014 }void loop() {// Send Day-of-WeekSerial.print(rtc.getDOWStr());Serial.print(" ");// Send dateSerial.print(rtc.getDateStr());Serial.print(" -- ");// Send timeSerial.println(rtc.getTimeStr());// Wait one second before repeating :)delay (1000); }

顯示時間的程序

// DS3231_Serial_Easy // Copyright (C)2015 Rinky-Dink Electronics, Henning Karlsen. All right reserved // web: http://www.RinkyDinkElectronics.com/ // // A quick demo of how to use my DS3231-library to // quickly send time and date information over a serial link // // To use the hardware I2C (TWI) interface of the Arduino you must connect // the pins as follows: // // Arduino Uno/2009: // ---------------------- // DS3231: SDA pin -> Arduino Analog 4 or the dedicated SDA pin // SCL pin -> Arduino Analog 5 or the dedicated SCL pin // // Arduino Leonardo: // ---------------------- // DS3231: SDA pin -> Arduino Digital 2 or the dedicated SDA pin // SCL pin -> Arduino Digital 3 or the dedicated SCL pin // // Arduino Mega: // ---------------------- // DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA pin // SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL pin // // Arduino Due: // ---------------------- // DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA1 (Digital 70) pin // SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL1 (Digital 71) pin // // The internal pull-up resistors will be activated when using the // hardware I2C interfaces. // // You can connect the DS3231 to any available pin but if you use any // other than what is described above the library will fall back to // a software-based, TWI-like protocol which will require exclusive access // to the pins used, and you will also have to use appropriate, external // pull-up resistors on the data and clock signals. //#include <DS3231.h>// Init the DS3231 using the hardware interface DS3231 rtc(SDA, SCL);void setup() {// Setup Serial connectionSerial.begin(115200);// Uncomment the next line if you are using an Arduino Leonardo//while (!Serial) {}// Initialize the rtc objectrtc.begin();// The following lines can be uncommented to set the date and time//rtc.setDOW(WEDNESDAY); // Set Day-of-Week to SUNDAY//rtc.setTime(12, 0, 0); // Set the time to 12:00:00 (24hr format)//rtc.setDate(1, 1, 2014); // Set the date to January 1st, 2014 }void loop() {// Send Day-of-WeekSerial.print(rtc.getDOWStr());Serial.print(" ");// Send dateSerial.print(rtc.getDateStr());Serial.print(" -- ");// Send timeSerial.println(rtc.getTimeStr());// Wait one second before repeating :)delay (1000); }

思路講解

1，#include <DS3231.h> ? ?//加載DS3231庫

2，DS3231 ?rtc(SDA, SCL); ? ?//設置I2C

3，rtc.begin(); ? //建立RTC對象

4，

? rtc.setDOW(WEDNESDAY); ? ? // 設置星期幾，例如 SUNDAY
? rtc.setTime(12, 0, 0); ? ? // 設置時間 12:00:00 (24小時制)
? rtc.setDate(1, 1, 2014); ? // 設置日期 ?1月，1日 ，2014 年

如果在顯示程序中，或不需要設置時間的時候，可以在前面加//給注釋掉

5，

rtc.getDOWStr() ? 獲取星期幾

rtc.getDateStr() ? ?獲取日期

rtc.getTimeStr() ? 獲取時間

總結

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