基于Arduino的多功能数字时钟

实现功能：

1. 显示时间、日期和星期

2. 断电保存时间

3. 通过按钮设置时间、日期

4. 整点响铃

5. 自定义闹钟

6. 显示温度

7. 自定义报警温度

8. 按键功能：按选择键进入设置时间功能；同时按 + - 键进入闹钟和报警温度设置功能；

9. 再按选择键光标跳动，光标跳到哪当前的参数即可通过加减键修改。

实验所需器件：

Arduino开发板或Atmega328P芯片、DS1302时钟芯片、温度传感器DS18b20、蜂鸣器、不带锁开关、LCD1602、10K可调电阻、10K电阻（可不接，即DS18b20端口的电阻可去掉，不影响读数）

Proteus ISIS 仿真图：



实物图：



程序如下：

/* *
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* LCD VSS pin to ground
* LCD VCC pin to 5V
* */
#include <DS1302.h>
#include <LiquidCrystal.h>       //LCD1602显示头文件
#include <OneWire.h>             //温度传感器DS18B20头文件
#include <DallasTemperature.h>  //温度传感器DS18B20头文件
#define ONE_WIRE_BUS A3            //DS18B20 信号端口
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
#define choose  A0   //选择端口
#define add  A1      //加
#define minus  A2    //减
#define Tone 13      //蜂鸣器端口
uint8_t CE_PIN   = 8;   //DS1302 RST端口
uint8_t IO_PIN   = 9;   //DS1302 DAT端口
uint8_t SCLK_PIN = 10;  //DS1302 CLK端口
DS1302 rtc(CE_PIN, IO_PIN, SCLK_PIN);  //创建 DS1302 对象
unsigned long seconds;
int s = 0, m = 0, h = 0, d = 0, mon = 0, y = 0;   //时间进位
int second = 0, minute = 0, hour = 0, day = 0, month = 0, year = 0;  //当前时间
int SECOND = 0, MINUTE = 0, HOUR = 0, DAY = 0, MONTH = 0, YEAR = 0;  //初始时间
int chose = 0, alarm_choose = 0 ,ButtonDelay = 10, frequence = 2093;
int alarm_hour = 7, alarm_minute = 30, alarm_second = 0;  //闹钟时间
double Temperatures, Temp_Alarm = 30 ;

void setup(){
for(int i = 2;i <= 13; i++){
pinMode(i,OUTPUT);
}
digitalWrite(add, HIGH);
digitalWrite(minus, HIGH);
digitalWrite(choose, HIGH);
lcd.begin(16, 2);  //初始化LCD1602
sensors.begin();   //初始化温度传感器DS18B20
//Time t(2015, 5, 16, 0, 2, 20, 1);  rtc.time(t);  //设置DS1302芯片初始时间
set(rtc.year(), rtc.month(), rtc.date(), rtc.hour(), rtc.minutes(), rtc.seconds());  //通电读取DS1302芯片的时间
rtc.write_protect(false);  // 关闭DS1302芯片写保护
rtc.halt(false);           //为true时DS1302暂停
}

/** 格式化输出 */
void FormatDisplay(int col, int row,int num){
lcd.setCursor(col, row);
if(num < 10)   lcd.print("0");
lcd.print(num);
}

/** 计算时间 */
void time() {
second = (SECOND + seconds) % 60;   //计算秒
m = (SECOND + seconds) / 60;        //分钟进位
FormatDisplay(6,1,second);

minute = (MINUTE + m) % 60;  //计算分钟
h = (MINUTE + m) / 60;       //小时进位
FormatDisplay(3,1,minute);

hour = (HOUR + h) % 24;   //计算小时
d = (HOUR + h) / 24;      //天数进位
FormatDisplay(0,1,hour);

lcd.setCursor(2, 1);
lcd.print(":");
lcd.setCursor(5, 1);
lcd.print(":");
}

/** 根据年月计算当月天数 */
int Days(int year, int month){
int days = 0;
if (month != 2){
switch(month){
case 1: case 3: case 5: case 7: case 8: case 10: case 12: days = 31;  break;
case 4: case 6: case 9: case 11:  days = 30;  break;
}
}else{   //闰年
if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0){
days = 29;
}
else{
days = 28;
}
}
return days;
}

/** 计算当月天数 */
void Day(){
int days = Days(year,month);
int days_up;
if(month == 1){
days_up = Days(year - 1, 12);
}
else{
days_up = Days(year, month - 1);
}
day = (DAY + d) % days;
if(day == 0){
day = days;
}
if((DAY + d) == days + 1 ){
DAY -= days;
mon++;
}
if((DAY + d) == 0){
DAY += days_up;
mon--;
}
FormatDisplay(8,0,day);
}

/** 计算月份 */
void Month(){
month = (MONTH + mon) % 12;
if(month == 0){
month = 12;
}
y = (MONTH + mon - 1) / 12;
FormatDisplay(5,0,month);
lcd.setCursor(7, 0);
lcd.print('-');
}

/** 计算年份 */
void Year(){
year = ( YEAR + y ) % 9999;
if(year == 0){
year = 9999;
}
lcd.setCursor(0, 0);
if(year < 1000){
lcd.print("0");
}
if(year < 100){
lcd.print("0");
}
if(year < 10){
lcd.print("0");
}
lcd.print(year);
lcd.setCursor(4, 0);
lcd.print('-');
}

/** 根据年月日计算星期几 */
void Week(int y,int m, int d){
if(m == 1){
m = 13;
}
if(m == 2){
m = 14;
}
int week = (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
String weekstr = "";
switch(week){
case 1: weekstr = "Mon. ";   break;
case 2: weekstr = "Tues. ";  break;
case 3: weekstr = "Wed. ";   break;
case 4: weekstr = "Thur. ";  break;
case 5: weekstr = "Fri. ";   break;
case 6: weekstr = "Sat. ";   break;
case 7: weekstr = "Sun. ";   break;
}
lcd.setCursor(11, 0);  lcd.print(weekstr);
}

/** 显示时间、日期、星期 */
void Display() {
time();
Day();
Month();
Year();
Week(year,month,day);
}

/** 显示光标 */
void DisplayCursor(int rol, int row) {
lcd.setCursor(rol, row);
lcd.cursor();
delay(100);
lcd.noCursor();
delay(100);
}

/** 设置初始时间 */
void set(int y, int mon, int d, int h, int m, int s){
YEAR = y;
MONTH = mon;
DAY = d;
HOUR = h;
MINUTE = m;
SECOND = s;
}

/** 通过按键设置时间 */
void Set_Time(int rol, int row, int &Time){
DisplayCursor(rol, row);
if(digitalRead(add) == LOW){
delay(ButtonDelay);
if(digitalRead(add) == LOW){
Time ++;
}
Display();
}
if(digitalRead(minus) == LOW){
delay(ButtonDelay);
if(digitalRead(minus) == LOW){
Time --;
}
Display();
}
}

/** 按键选择 */
void Set_Clock(){
if(digitalRead(choose)==LOW){
lcd.setCursor(9, 1);  lcd.print("SetTime");
while(1){
if(digitalRead(choose) == LOW){
delay(ButtonDelay);
if(digitalRead(choose) ==L OW){
chose++;
}

}
seconds = millis()/1000;
Display();
if(chose == 1){
Set_Time(1, 1, HOUR);      //SetHour
}else if(chose == 2){
Set_Time(4, 1, MINUTE);    //SetMinute
}else if(chose == 3){
Set_Time(7, 1, SECOND);    //SetSecond
}else if(chose == 4){
Set_Time(9, 0, DAY);       //SetDay
}else if(chose == 5){
Set_Time(6, 0, MONTH);     // SetMonth
}else if(chose == 6){
Set_Time(3, 0, YEAR);      //SetYear
}else if(chose >= 7) {
chose = 0;
break;
}
}
}
}

/** 设置闹钟小时 */
void Set_Alarm_Hour(){
DisplayCursor(1, 1);
if(digitalRead(add) == LOW){
delay(ButtonDelay);
if(digitalRead(add) == LOW){
alarm_hour ++;
if(alarm_hour == 24){
alarm_hour = 0;
}
FormatDisplay(0,1,alarm_hour);
}
}
if(digitalRead(minus) == LOW){
delay(ButtonDelay);
if(digitalRead(minus) == LOW){
alarm_hour --;
if(alarm_hour == -1){
alarm_hour = 23;
}
FormatDisplay(0,1,alarm_hour);
}
}
}

/** 设置闹钟分钟 */
void Set_Alarm_Minute(){
DisplayCursor(4, 1);
if(digitalRead(add) == LOW) {
delay(ButtonDelay);
if(digitalRead(add) == LOW){
alarm_minute ++;
if(alarm_minute == 60){
alarm_minute = 0;
}
FormatDisplay(3,1,alarm_minute);
}
}
if(digitalRead(minus) == LOW){
delay(ButtonDelay);
if(digitalRead(minus) == LOW){
alarm_minute --;
if(alarm_minute == -1){
alarm_minute = 59;
}
FormatDisplay(3,1,alarm_minute);
}
}
}

/** 设置报警温度 */
void Set_Alarm_Temp(){
DisplayCursor(10, 1);
if(digitalRead(add) == LOW) {
delay(ButtonDelay);
if(digitalRead(add) == LOW){
Temp_Alarm ++;
}
}
if(digitalRead(minus) == LOW){
delay(ButtonDelay);
if(digitalRead(minus) == LOW){
Temp_Alarm --;
}
}
}

/** 进入报警设置 */
void Set_Alarm(){
if(digitalRead(add) == LOW && digitalRead(minus) == LOW){
alarm_hour = hour;
alarm_minute = minute;
//alarm_choose  = 1;
lcd.setCursor(0, 0);
lcd.print("set alarm       ");
lcd.setCursor(6, 1);
lcd.print("00");         //闹钟秒数
while(1){
if(digitalRead(choose) == LOW){
delay(ButtonDelay);
if(digitalRead(choose) == LOW){
alarm_choose++;

}
}
lcd.setCursor(9, 1);
lcd.print(Temp_Alarm);
lcd.setCursor(14, 1);
lcd.print((char)223);    //显示o符号
lcd.setCursor(15, 1);
lcd.print("C");          //显示字母C
if(alarm_choose == 1){
Set_Alarm_Hour();
}else if(alarm_choose == 2){
Set_Alarm_Minute();
}else if(alarm_choose == 3){
Set_Alarm_Temp();
}else if(alarm_choose >= 4){
alarm_choose = 0;
break;
}
}
}
}

/** 正点蜂鸣 */
void Point_Time_Alarm(){
if(minute == 0 && second == 0){
tone(Tone,frequence);
delay(500);
noTone(Tone);
}
}

/** 闹钟 指定时间蜂鸣 */
void Clock_Alarm(){
if(hour == alarm_hour && minute == alarm_minute && second == alarm_second){
tone(Tone,frequence);
delay(5000);
noTone(Tone);
}
}

/** 获取DS18B20温度 */
void GetTemperatures(){
sensors.requestTemperatures(); // Send the command to get temperatures
Temperatures = sensors.getTempCByIndex(0);
lcd.setCursor(9, 1) ;
lcd.print(Temperatures); //获取温度
lcd.setCursor(14, 1);
lcd.print((char)223); //显示o符号
lcd.setCursor(15, 1);
lcd.print("C"); //显示字母C
}

/** 超过指定温度报警 */
void Temperatures_Alarm(){
if(Temperatures >= Temp_Alarm){
tone(Tone,frequence);
delay(500);
noTone(Tone);
}
}

void loop() {
seconds = millis()/1000;    //获取单片机当前运行时间
Display();       //显示时间
Set_Clock();     //设置时间
Set_Alarm();     //设置闹钟
Point_Time_Alarm();    //正点蜂鸣
Clock_Alarm();         //闹钟时间蜂鸣
GetTemperatures();     //获取DS18B20温度
Temperatures_Alarm();  //超过指定温度报警
Time t(year, month, day, hour, minute, second, 1);  //断电将单片机的当前时间写到DS1302芯片中
rtc.time(t);
}