arduino教程系列P-1 arduino lcd1602电子时钟

此方法可以不用任何外接时钟芯片，即可实现1602显示当前年月日时间等信息。

但是如何通过加入按钮实现时间调节尚未实现。当前的代码在年份显示一项只显示2010，不知为何。

板子

http://arduino.cc/en/Main/arduinoBoardDuemilanove

lcd 1602 接线参照弘毅的教程

http://www.geek-workshop.com/forum.php?mod=viewthread&tid=78&reltid=955&pre_thread_id=0&pre_pos=1&ext=

2012-6-23 13:58 上传
(167.29 KB)

2012-6-23 13:58 上传
(147.61 KB)

库

http://www.arduino.cc/playground/uploads/Code/DateTime.zip

代码如下ARDUINO 代码复制打印

#include <LiquidCrystal.h>#include <DateTime.h>#include <DateTimeStrings.h>#define dt_SHORT_DAY_STRINGS#define dt_SHORT_MONTH_STRINGS// simple sketch to display a digital clock on an LCD// see the LiquidCrystal documentation for more info on thisLiquidCrystal lcd(12, 11, 5, 4, 3, 2);int backLight = 13; // pin 13 will control the backlightvoid setup(){pinMode(backLight, OUTPUT);digitalWrite(backLight, HIGH); // turn backlight on. Replace 'HIGH' with 'LOW' to turn it off.DateTime.sync(DateTime.makeTime(30, 41, 12, 23, 06, 2012)); // sec, min, hour, date, month, year // Replace this with the most current time}void loop(){ if(DateTime.available()) {unsigned long prevtime = DateTime.now();while( prevtime == DateTime.now() ) // wait for the second to rollover;DateTime.available(); //refresh the Date and time propertiesdigitalClockDisplay( ); // update digital clock}}void printDigits(byte digits){// utility function for digital clock display: prints preceding colon and leading 0lcd.print(":");if(digits < 10)lcd.print('0');lcd.print(digits,DEC);}void digitalClockDisplay(){lcd.clear();lcd.begin(16,2);lcd.setCursor(3,0);//lcd.print(DateTimeStrings.dayStr(DateTime.DayofWeek));if(DateTime.Day <10)lcd.print('0');lcd.print(DateTime.Day,DEC);lcd.print("/");//lcd.print(DateTimeStrings.monthStr(DateTime.Month));if(DateTime.Month <10)lcd.print('0');lcd.print(DateTime.Month,DEC);lcd.print("/");lcd.print((DateTime.Year,DEC)+2000);//lcd.print(" ");if(DateTime.Hour <10)lcd.setCursor(5,1);lcd.setCursor(4,1);// digital clock display of current timelcd.print(DateTime.Hour,DEC);printDigits(DateTime.Minute);printDigits(DateTime.Second);}

#include <LiquidCrystal.h>


#include <DateTime.h>


#include <DateTimeStrings.h>





#define dt_SHORT_DAY_STRINGS


#define dt_SHORT_MONTH_STRINGS





// simple sketch to display a digital clock on an LCD


// see the LiquidCrystal documentation for more info on this





LiquidCrystal lcd(12, 11, 5, 4, 3, 2);


int backLight = 13; // pin 13 will control the backlight





void setup(){


pinMode(backLight, OUTPUT);


digitalWrite(backLight, HIGH); // turn backlight on. Replace 'HIGH' with 'LOW' to turn it off.





DateTime.sync(DateTime.makeTime(30, 41, 12, 23, 06, 2012)); // sec, min, hour, date, month, year // Replace this with the most current time


}





void loop(){ 


if(DateTime.available()) {


unsigned long prevtime = DateTime.now();


while( prevtime == DateTime.now() ) // wait for the second to rollover


;





DateTime.available(); //refresh the Date and time properties


digitalClockDisplay( ); // update digital clock


}


}





void printDigits(byte digits){


// utility function for digital clock display: prints preceding colon and leading 0


lcd.print(":");


if(digits < 10)


lcd.print('0');


lcd.print(digits,DEC);


}











void digitalClockDisplay(){


lcd.clear();


lcd.begin(16,2);


lcd.setCursor(3,0);





//lcd.print(DateTimeStrings.dayStr(DateTime.DayofWeek));


if(DateTime.Day <10)


lcd.print('0');


lcd.print(DateTime.Day,DEC);


lcd.print("/");





//lcd.print(DateTimeStrings.monthStr(DateTime.Month));


if(DateTime.Month <10)


lcd.print('0');


lcd.print(DateTime.Month,DEC);


lcd.print("/");


lcd.print((DateTime.Year,DEC)+2000);





//lcd.print(" ");


if(DateTime.Hour <10)


lcd.setCursor(5,1);


lcd.setCursor(4,1);





// digital clock display of current time


lcd.print(DateTime.Hour,DEC);


printDigits(DateTime.Minute);


printDigits(DateTime.Second);


}

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