DS1306實時時鐘模組+0.96OLED -ESP32
DS1306實時時鐘模組-ESP32
◎ 時鐘具有能計算2100 年之前的秒、分、時、日、星期、月、年的能力，還有閏年調整的能力
◎ 31 8 位暫存數據存儲RAM
◎ 串行 I/O 口方式使得管腳數量最少
◎ 寬範圍工作電壓2.0 5.5V
◎ 工作電流 2.0V 時,小於300nA
◎ 讀 / 寫時鐘或RAM 數據時有兩種傳送方式單字節傳送和多字節傳送字符組方式
◎ 8 腳DIP 封裝或可選的8 腳SOIC 封裝根據表面裝配
◎ 簡單 3 線接口
◎ 與 TTL 相容Vcc=5V
◎ 雙電源管用於主電源和備份電源供應
◎ 電池：CR2032 電壓3V，電流260mAh
◎ 晶振32.768KHz，匹配電容為6pF
◎ DS1302為8腳直插大晶片，晶片下面有IC座，方便更換及插拔片
6.模塊工作電壓兼容3.3V/5V，可與5V及3.3V單片機連接
◎帶4個定位孔，直徑3.1mm
◎工作溫度：0°～70°
◎ 安裝注意!
1.VCC與GND千萬不要接反，以免燒壞晶片
2.51系列單晶片P0接腳需要連接上拉電阻，如果單晶片沒有連接上拉電阻，可以將數據線接到其他接腳
◎ 31 8 位暫存數據存儲RAM
◎ 串行 I/O 口方式使得管腳數量最少
◎ 寬範圍工作電壓2.0 5.5V
◎ 工作電流 2.0V 時,小於300nA
◎ 讀 / 寫時鐘或RAM 數據時有兩種傳送方式單字節傳送和多字節傳送字符組方式
◎ 8 腳DIP 封裝或可選的8 腳SOIC 封裝根據表面裝配
◎ 簡單 3 線接口
◎ 與 TTL 相容Vcc=5V
◎ 雙電源管用於主電源和備份電源供應
◎ 電池：CR2032 電壓3V，電流260mAh
◎ 晶振32.768KHz，匹配電容為6pF
◎ DS1302為8腳直插大晶片，晶片下面有IC座，方便更換及插拔片
6.模塊工作電壓兼容3.3V/5V，可與5V及3.3V單片機連接
◎帶4個定位孔，直徑3.1mm
◎工作溫度：0°～70°
◎ 安裝注意!
1.VCC與GND千萬不要接反，以免燒壞晶片
2.51系列單晶片P0接腳需要連接上拉電阻，如果單晶片沒有連接上拉電阻，可以將數據線接到其他接腳
步驟1:
在Arduino IDE下載程式庫DS1302，並選好版型，COM和波特率
接線
// DS1302 CLK/SCLK --> 5
// DS1302 DAT/IO --> 4
// DS1302 RST/CE --> 2
// DS1302 VCC --> 3.3v - 5v
// DS1302 GND --> GND
程式碼
#include <ThreeWire.h>
#include <RtcDS1302.h>
ThreeWire myWire(4,5,2); // IO, SCLK, CE //对应接到ESP32的IO号
RtcDS1302<ThreeWire> Rtc(myWire);
void setup ()
{
Serial.begin(57600);
Serial.print("compiled: ");
Serial.print(__DATE__); //打印系统日期
Serial.println(__TIME__); //打印系统时间
Rtc.Begin(); //用管脚声明来初始化RTC
RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__); //将系统时间声明一个时间结构
printDateTime(compiled); //打印时间
Serial.println();
if (!Rtc.IsDateTimeValid()) //读RTC时间，如果没读到，就是电池没电了
{
// 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); //设置系统时间为当前时间
}
if (Rtc.GetIsWriteProtected()) //检查是不是写保护了
{
Serial.println("RTC was write protected, enabling writing now");
Rtc.SetIsWriteProtected(false);
}
if (!Rtc.GetIsRunning()) //检查是不是可读
{
Serial.println("RTC was not actively running, starting now");
Rtc.SetIsRunning(true);
}
RtcDateTime now = Rtc.GetDateTime(); //得到RTC的时间
if (now < compiled) //如果读出的时间早于系统时间，则重新设置RTC时间
{
Serial.println("RTC is older than compile time! (Updating DateTime)");
Rtc.SetDateTime(compiled);
}
else if (now > compiled) //如果读出的时间晚于系统时间，则重新设置RTC时间
{
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(); //核心函数，读当前RTC时间
printDateTime(now);
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!");
}
delay(10000); // ten seconds //延时10s
}
#define countof(a) (sizeof(a) / sizeof(a[0]))
void printDateTime(const RtcDateTime& dt) //一个通过串口格式化打印日期和时间的函数
{
char datestring[20];
snprintf_P(datestring, //avr的一个打印格式化函数
countof(datestring),
PSTR("%04u/%02u/%02u %02u:%02u:%02u"), //和print类似，指定长度
dt.Year(),
dt.Month(),
dt.Day(),
dt.Hour(),
dt.Minute(),
dt.Second() );
Serial.print(datestring);
}
DS1306實時時鐘模組+0.96OLED
提示:先下載這些程式庫
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Adafruit_GrayOLED.h>
#include <Wire.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>
ds1302在範例裡面有
// CONNECTIONS:
// DS1302 CLK/SCLK --> 5
// DS1302 DAT/IO --> 4
// DS1302 RST/CE --> 2
// DS1302 VCC --> 3.3v - 5v
// DS1302 GND --> GND
#include <SPI.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Adafruit_GrayOLED.h>
#include <Wire.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>
ThreeWire myWire(4,5,2); // IO, SCLK, CE
RtcDS1302<ThreeWire> Rtc(myWire);
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
void setup ()
{
Serial.begin(115200);
display.begin(SSD1306_SWITCHCAPVCC, 0x3C, OLED_RESET);
Serial.print("compiled: ");
Serial.print(__DATE__);
Serial.println(__TIME__);
Rtc.Begin();
RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
Serial.println();
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);
}
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();
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!");
}
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.print(now.Year()); display.print("/"); display.print(now.Month()); display.print("/"); display.println(now.Day());
display.setCursor(0, 20);
display.setTextSize(2);
display.setTextColor(WHITE);
display.print(now.Hour()); display.print(":"); display.print(now.Minute()); display.print(":"); display.println(now.Second());
display.display();
delay(1000); // ten seconds
}
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