Bonjour à toi,
Pour mon projet (horloge Pong) j'utilise une librairie qui est compatible avec l'arduino 1.xx
Par-contre je ne retrouve plus le liens d'origine. :~
Je te le met dans la journée lorsque je l'aurai retrouvé.
La voici :
DS1307.cpp
/*
*
********************************************************************************************************
* DS1307.cpp library for DS1307 I2C rtc clock *
********************************************************************************************************
*
* Created by D. Sjunnesson 1scale1.com d.sjunnesson (at) 1scale1.com
* Modified by bricofoy - bricofoy (at) free.fr
*
* Created with combined information from
* http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1180908809
* http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1191209057
*
* Big credit to mattt (please contact me for a more correct name...) from the Arduino forum
* which has written the main part of the library which I have modified
*
* Rev history :
*
* ??-??-?? - mattt & dsjunnesson - creation
* 19-feb-2012 - bricofoy - added arduino 1.0 compatibility
* 20-feb-2012 - bricofoy - bugfix : time was not preserved when setting or stopping clock
* 21-feb-2012 - bricofoy - bugfix : preserve existing seconds when starting/stopping clock
*
*TODO: enable AM/PM
* enable square wave output
*
*/
#include "DS1307.h"
DS1307::DS1307()
{
Wire.begin();
}
DS1307 RTC=DS1307();
// PRIVATE FUNCTIONS
// Aquire data from the RTC chip in BCD format
// refresh the buffer
void DS1307::read(void)
{
// use the Wire lib to connect to the rtc
// reset the register pointer to zero
Wire.beginTransmission(DS1307_CTRL_ID);
#if defined(ARDUINO) && ARDUINO >= 100
Wire.write((byte)0x00);//workaround for issue #527
#else
Wire.send(0x00);
#endif
Wire.endTransmission();
// request the 7 bytes of data (secs, min, hr, dow, date. mth, yr)
Wire.requestFrom(DS1307_CTRL_ID, 7);
for(int i=0; i<7; i++)
{
// store data in raw bcd format
#if defined(ARDUINO) && ARDUINO >= 100
rtc_bcd[i]=Wire.read();
#else
rtc_bcd[i]=Wire.receive();
#endif
}
}
// update the data on the IC from the bcd formatted data in the buffer
void DS1307::save(void)
{
Wire.beginTransmission(DS1307_CTRL_ID);
#if defined(ARDUINO) && ARDUINO >= 100
Wire.write((byte)0x00);// reset register pointer
#else
Wire.send(0x00);
#endif
for(int i=0; i<7; i++)
{
#if defined(ARDUINO) && ARDUINO >= 100
Wire.write(rtc_bcd[i]);
#else
Wire.send(rtc_bcd[i]);
#endif
}
Wire.endTransmission();
}
// PUBLIC FUNCTIONS
void DS1307::get(int *rtc, boolean refresh) // Aquire data from buffer and convert to int, refresh buffer if required
{
if(refresh) read();
for(int i=0;i<7;i++) // cycle through each component, create array of data
{
rtc[i]=get(i, 0);
}
}
int DS1307::get(int c, boolean refresh) // aquire individual RTC item from buffer, return as int, refresh buffer if required
{
if(refresh) read();
int v=-1;
switch(c)
{
case DS1307_SEC:
v=(10*((rtc_bcd[DS1307_SEC] & DS1307_HI_SEC)>>4))+(rtc_bcd[DS1307_SEC] & DS1307_LO_BCD);
break;
case DS1307_MIN:
v=(10*((rtc_bcd[DS1307_MIN] & DS1307_HI_MIN)>>4))+(rtc_bcd[DS1307_MIN] & DS1307_LO_BCD);
break;
case DS1307_HR:
v=(10*((rtc_bcd[DS1307_HR] & DS1307_HI_HR)>>4))+(rtc_bcd[DS1307_HR] & DS1307_LO_BCD);
break;
case DS1307_DOW:
v=rtc_bcd[DS1307_DOW] & DS1307_LO_DOW;
break;
case DS1307_DATE:
v=rtc_bcd[DS1307_DATE]/16 * 10 + rtc_bcd[DS1307_DATE] % 16;
break;
case DS1307_MTH:
v=(10*((rtc_bcd[DS1307_MTH] & DS1307_HI_MTH)>>4))+(rtc_bcd[DS1307_MTH] & DS1307_LO_BCD);
break;
case DS1307_YR:
v=2000 + rtc_bcd[DS1307_YR]/16 * 10 + rtc_bcd[DS1307_YR] % 16;
break;
} // end switch
return v;
}
void DS1307::set(int c, int v) // Update buffer, then update the chip
{
read(); //first read the buffer to preserve current time when writing modified values, as the function writes all values at the same time
switch(c)
{
case DS1307_SEC:
if(v<60 && v>-1)
{
//preserve existing clock state (running/stopped)
int state=rtc_bcd[DS1307_SEC] & DS1307_CLOCKHALT;
rtc_bcd[DS1307_SEC]=state | ((v / 10)<<4) + (v % 10);
}
break;
case DS1307_MIN:
if(v<60 && v>-1)
{
rtc_bcd[DS1307_MIN]=((v / 10)<<4) + (v % 10);
}
break;
case DS1307_HR:
// TODO : AM/PM 12HR/24HR
if(v<24 && v>-1)
{
rtc_bcd[DS1307_HR]=((v / 10)<<4) + (v % 10);
}
break;
case DS1307_DOW:
if(v<8 && v>-1)
{
rtc_bcd[DS1307_DOW]=v;
}
break;
case DS1307_DATE:
if(v<32 && v>-1)
{
rtc_bcd[DS1307_DATE]=((v / 10)<<4) + (v % 10);
}
break;
case DS1307_MTH:
if(v<13 && v>-1)
{
rtc_bcd[DS1307_MTH]=((v / 10)<<4) + (v % 10);
}
break;
case DS1307_YR:
if(v<50 && v>-1)
{
rtc_bcd[DS1307_YR]=((v / 10)<<4) + (v % 10);
}
break;
} // end switch
save();
}
void DS1307::stop(void)
{
// set the ClockHalt bit high to stop the rtc
// this bit is part of the seconds byte
read(); //refresh buffer first to preserve existing time
rtc_bcd[DS1307_SEC]=rtc_bcd[DS1307_SEC] | DS1307_CLOCKHALT; //set the halt bit in the seconds value
save(); //write register to the chip
}
void DS1307::start(void)
{
// unset the ClockHalt bit to start the rtc
read(); //refresh buffer to get existing time
rtc_bcd[DS1307_SEC]-=DS1307_CLOCKHALT; //unset the halt bit in the seconds value
save(); //write register to the chip
}
DS1307.h
/*
*
********************************************************************************************************
* DS1307.h library for DS1307 I2C rtc clock *
********************************************************************************************************
*
* Created by D. Sjunnesson 1scale1.com d.sjunnesson (at) 1scale1.com
* Modified by bricofoy - bricofoy (at) free.fr
*
* Created with combined information from
* http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1180908809
* http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1191209057
*
* Big credit to mattt (please contact me for a more correct name...) from the Arduino forum
* which has written the main part of the library which I have modified
*
* Rev history :
*
* ??-??-?? - mattt & dsjunnesson - creation
* 19-feb-2012 - bricofoy - added arduino 1.0 compatibility
* 20-feb-2012 - bricofoy - bugfix : time was not preserved when setting or stopping clock
* 21-feb-2012 - bricofoy - bugfix : preserve existing seconds when starting/stopping clock
*
*TODO: enable AM/PM
* enable square wave output
*
*/
// ensure this library description is only included once
#ifndef DS1307_h
#define DS1307_h
// include types & constants of Wiring core API
// this "if" is for compatibility with both arduino 1.0 and previous versions
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
// include types & constants of Wire ic2 lib
#include <../Wire/Wire.h>
#define DS1307_SEC 0
#define DS1307_MIN 1
#define DS1307_HR 2
#define DS1307_DOW 3
#define DS1307_DATE 4
#define DS1307_MTH 5
#define DS1307_YR 6
#define DS1307_BASE_YR 2000
#define DS1307_CTRL_ID B1101000 //DS1307
// Define register bit masks
#define DS1307_CLOCKHALT B10000000
#define DS1307_LO_BCD B00001111
#define DS1307_HI_BCD B11110000
#define DS1307_HI_SEC B01110000
#define DS1307_HI_MIN B01110000
#define DS1307_HI_HR B00110000
#define DS1307_LO_DOW B00000111
#define DS1307_HI_DATE B00110000
#define DS1307_HI_MTH B00110000
#define DS1307_HI_YR B11110000
// library interface description
class DS1307
{
// user-accessible "public" interface
public:
DS1307();
void get(int *, boolean);
int get(int, boolean);
void set(int, int);
void start(void);
void stop(void);
// library-accessible "private" interface
private:
byte rtc_bcd[7]; // used prior to read/set ds1307 registers;
void read(void);
void save(void);
};
extern DS1307 RTC;
#endif