ds1302时钟lcd1602显示(可以按键设置时钟)代码

以下是DS1302时钟与LCD1602显示屏结合的Arduino代码，可以通过按键设置时钟：

#include <DS1302.h>
#include <LiquidCrystal.h>

// Define DS1302 pins
const int RTC_SCLK = 2;
const int RTC_IO = 3;
const int RTC_CE = 4;

// Define LCD1602 pins
const int LCD_RS = 12;
const int LCD_EN = 11;
const int LCD_D4 = 5;
const int LCD_D5 = 6;
const int LCD_D6 = 7;
const int LCD_D7 = 8;
LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);

DS1302 rtc(RTC_SCLK, RTC_IO, RTC_CE);

int second, minute, hour, dayOfWeek, dayOfMonth, month, year;

void setup() {
  lcd.begin(16, 2);
  rtc.begin();

  // Set the clock to 12:00:00 AM on January 1, 2020
  rtc.writeProtect(false);
  rtc.halt(false);
  rtc.setDOW(MONDAY);
  rtc.setTime(12, 0, 0);
  rtc.setDate(1, 1, 2020);
  rtc.writeProtect(true);
}

void loop() {
  // Get the current time from the DS1302
  second = rtc.getSecond();
  minute = rtc.getMinute();
  hour = rtc.getHour();
  dayOfWeek = rtc.getDOW();
  dayOfMonth = rtc.getDay();
  month = rtc.getMonth();
  year = rtc.getYear();

  // Display the current time on the LCD1602
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  lcd.print(hour, DEC);
  lcd.print(":");
  if (minute < 10) {
    lcd.print("0");
  }
  lcd.print(minute, DEC);
  lcd.print(":");
  if (second < 10) {
    lcd.print("0");
  }
  lcd.print(second, DEC);

  // Display the current date on the LCD1602
  lcd.setCursor(0, 1);
  lcd.print("Date: ");
  lcd.print(month, DEC);
  lcd.print("/");
  lcd.print(dayOfMonth, DEC);
  lcd.print("/");
  lcd.print(year, DEC);

  // Check if any buttons are pressed to set the time
  if (digitalRead(9) == LOW) { // Set Hour Button
    delay(50); // Debounce Button
    if (digitalRead(9) == LOW) { // Check if Button is still pressed
      hour++;
      if (hour > 23) {
        hour = 0;
      }
      rtc.setTime(hour, minute, second);
    }
  }
  if (digitalRead(10) == LOW) { // Set Minute Button
    delay(50); // Debounce Button
    if (digitalRead(10) == LOW) { // Check if Button is still pressed
      minute++;
      if (minute > 59) {
        minute = 0;
      }
      rtc.setTime(hour, minute, second);
    }
  }
  if (digitalRead(11) == LOW) { // Set Second Button
    delay(50); // Debounce Button
    if (digitalRead(11) == LOW) { // Check if Button is still pressed
      second++;
      if (second > 59) {
        second = 0;
      }
      rtc.setTime(hour, minute, second);
    }
  }
  if (digitalRead(13) == LOW) { // Set Date Button
    delay(50); // Debounce Button
    if (digitalRead(13) == LOW) { // Check if Button is still pressed
      dayOfMonth++;
      if (dayOfMonth > 31) {
        dayOfMonth = 1;
      }
      rtc.setDate(dayOfMonth, month, year);
    }
  }
  if (digitalRead(14) == LOW) { // Set Month Button
    delay(50); // Debounce Button
    if (digitalRead(14) == LOW) { // Check if Button is still pressed
      month++;
      if (month > 12) {
        month = 1;
      }
      rtc.setDate(dayOfMonth, month, year);
    }
  }
  if (digitalRead(15) == LOW) { // Set Year Button
    delay(50); // Debounce Button
    if (digitalRead(15) == LOW) { // Check if Button is still pressed
      year++;
      if (year > 2099) {
        year = 2020;
      }
      rtc.setDate(dayOfMonth, month, year);
    }
  }
}

代码中使用了DS1302库和LiquidCrystal库，需要在Arduino IDE中安装这两个库才能编译通过。代码中的数字9、10、11、13、14、15分别对应6个按键的引脚，按键的具体接法可以根据自己的需求进行修改。