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Topic: DS1307 library updated for IDE 1.0 (Read 1 time) previous topic - next topic

cantore

I want to share with you a DS1307 library updated for IDE 1.0 (the original one is from seeedstudio)

cpp
Code: [Select]

#include "Arduino.h"

extern "C" {
#include <Wire.h>
#include <avr/pgmspace.h>
}

#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 tho rtc
 // reset the resgiter pointer to zero
 Wire.beginTransmission(DS1307_CTRL_ID);
 Wire.write((uint8_t)0x00);
 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
   rtc_bcd[i]=Wire.read();
 }
}

// update the data on the IC from the bcd formatted data in the buffer
void DS1307::save(void)
{
 Wire.beginTransmission(DS1307_CTRL_ID);
 Wire.write((byte)0x00); // reset register pointer
 for(int i=0; i<7; i++)
 {
   Wire.write(rtc_bcd[i]);
 }
 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
{
 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
 rtc_bcd[DS1307_SEC]=rtc_bcd[DS1307_SEC] | DS1307_CLOCKHALT;
 save();
}

void DS1307::start(void)
{
 // unset the ClockHalt bit to start the rtc
 // TODO : preserve existing seconds
 rtc_bcd[DS1307_SEC]=0;
 save();
}





h
Code: [Select]

/*
 DS1307.h - library for DS1307 rtc
*/

// ensure this library description is only included once
#ifndef DS1307_h
#define DS1307_h

// include types & constants of Wiring core API

#include "Arduino.h"

// 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




Testato

Ciao Cantore,

the original library is here: http://code.google.com/p/ds1307/

may you officially correct it ? i open an issue on 1.0 compatibility but i think that the autor abandoned it.

Is there an help request also on italian forum, if you want respond here: http://arduino.cc/forum/index.php/topic,83670.msg629112.html#msg629112

grazie
ciao
- [Guida] IDE - http://goo.gl/ln6glr
- [Lib] ST7032i LCD I2C - http://goo.gl/GNojT6
- [Lib] PCF8574+HD44780 LCD I2C - http://goo.gl/r7CstH

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