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/*
DS1302.cpp - Arduino library support for the DS1302 Trickle Charge Timekeeping Chip
Copyright (C)2010 Henning Karlsen. All right reserved
You can find the latest version of the library at
This library has been made to easily interface and use the DS1302 RTC with
the Arduino.
If you make any modifications or improvements to the code, I would appreciate
that you share the code with me so that I might include it in the next release.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "DS1302.h"
#define REG_SEC 0
#define REG_MIN 1
#define REG_HOUR 2
#define REG_DATE 3
#define REG_MON 4
#define REG_DOW 5
#define REG_YEAR 6
#define REG_WP 7
#define REG_TCR 8
/* Public */
Time::Time()
{
this->year = 2010;
this->mon = 1;
this->date = 1;
this->hour = 0;
this->min = 0;
this->sec = 0;
this->dow = 5;
}
DS1302_RAM::DS1302_RAM()
{
for (int i=0; i<31; i++)
cell[i]=0;
}
DS1302::DS1302(uint8_t ce_pin, uint8_t data_pin, uint8_t sclk_pin)
{
_ce_pin = ce_pin;
_data_pin = data_pin;
_sclk_pin = sclk_pin;
pinMode(_ce_pin, OUTPUT);
pinMode(_sclk_pin, OUTPUT);
}
Time DS1302::getTime()
{
Time t;
_burstRead();
t.sec = _decode(_burstArray[0]);
t.min = _decode(_burstArray[1]);
t.hour = _decodeH(_burstArray[2]);
t.date = _decode(_burstArray[3]);
t.mon = _decode(_burstArray[4]);
t.dow = _burstArray[5];
t.year = _decodeY(_burstArray[6])+2000;
return t;
}
void DS1302::setTime(uint8_t hour, uint8_t min, uint8_t sec)
{
if (((hour>=0) && (hour<24)) && ((min>=0) && (min<60)) && ((sec>=0) && (sec<60)))
{
_writeRegister(REG_HOUR, _encode(hour));
_writeRegister(REG_MIN, _encode(min));
_writeRegister(REG_SEC, _encode(sec));
}
}
void DS1302::setDate(uint8_t date, uint8_t mon, uint16_t year)
{
if (((date>0) && (date<=31)) && ((mon>0) && (mon<=12)) && ((year>=2000) && (year<3000)))
{
year -= 2000;
_writeRegister(REG_YEAR, _encode(year));
_writeRegister(REG_MON, _encode(mon));
_writeRegister(REG_DATE, _encode(date));
}
}
void DS1302::setDOW(uint8_t dow)
{
if ((dow>0) && (dow<8))
_writeRegister(REG_DOW, dow);
}
char *DS1302::getTimeStr(uint8_t format)
{
char *output= "xxxxxxxx";
Time t;
t=getTime();
if (t.hour<10)
output[0]=48;
else
output[0]=char((t.hour / 10)+48);
output[1]=char((t.hour % 10)+48);
output[2]=58;
if (t.min<10)
output[3]=48;
else
output[3]=char((t.min / 10)+48);
output[4]=char((t.min % 10)+48);
output[5]=58;
if (format==FORMAT_SHORT)
output[5]=0;
else
{
if (t.sec<10)
output[6]=48;
else
output[6]=char((t.sec / 10)+48);
output[7]=char((t.sec % 10)+48);
output[8]=0;
}
return output;
}
char *DS1302::getDateStr(uint8_t slformat, uint8_t eformat, char divider)
{
char *output= "xxxxxxxxxx";
int yr, offset;
Time t;
t=getTime();
switch (eformat)
{
case FORMAT_LITTLEENDIAN:
if (t.date<10)
output[0]=48;
else
output[0]=char((t.date / 10)+48);
output[1]=char((t.date % 10)+48);
output[2]=divider;
if (t.mon<10)
output[3]=48;
else
output[3]=char((t.mon / 10)+48);
output[4]=char((t.mon % 10)+48);
output[5]=divider;
if (slformat==FORMAT_SHORT)
{
yr=t.year-2000;
if (yr<10)
output[6]=48;
else
output[6]=char((yr / 10)+48);
output[7]=char((yr % 10)+48);
output[8]=0;
}
else
{
yr=t.year;
output[6]=char((yr / 1000)+48);
output[7]=char(((yr % 1000) / 100)+48);
output[8]=char(((yr % 100) / 10)+48);
output[9]=char((yr % 10)+48);
output[10]=0;
}
break;
case FORMAT_BIGENDIAN:
if (slformat==FORMAT_SHORT)
offset=0;
else
offset=2;
if (slformat==FORMAT_SHORT)
{
yr=t.year-2000;
if (yr<10)
output[0]=48;
else
output[0]=char((yr / 10)+48);
output[1]=char((yr % 10)+48);
output[2]=divider;
}
else
{
yr=t.year;
output[0]=char((yr / 1000)+48);
output[1]=char(((yr % 1000) / 100)+48);
output[2]=char(((yr % 100) / 10)+48);
output[3]=char((yr % 10)+48);
output[4]=divider;
}
if (t.mon<10)
output[3+offset]=48;
else
output[3+offset]=char((t.mon / 10)+48);
output[4+offset]=char((t.mon % 10)+48);
output[5+offset]=divider;
if (t.date<10)
output[6+offset]=48;
else
output[6+offset]=char((t.date / 10)+48);
output[7+offset]=char((t.date % 10)+48);
output[8+offset]=0;
break;
case FORMAT_MIDDLEENDIAN:
if (t.mon<10)
output[0]=48;
else
output[0]=char((t.mon / 10)+48);
output[1]=char((t.mon % 10)+48);
output[2]=divider;
if (t.date<10)
output[3]=48;
else
output[3]=char((t.date / 10)+48);
output[4]=char((t.date % 10)+48);
output[5]=divider;
if (slformat==FORMAT_SHORT)
{
yr=t.year-2000;
if (yr<10)
output[6]=48;
else
output[6]=char((yr / 10)+48);
output[7]=char((yr % 10)+48);
output[8]=0;
}
else
{
yr=t.year;
output[6]=char((yr / 1000)+48);
output[7]=char(((yr % 1000) / 100)+48);
output[8]=char(((yr % 100) / 10)+48);
output[9]=char((yr % 10)+48);
output[10]=0;
}
break;
}
return output;
}
char *DS1302::getDOWStr(uint8_t format)
{
char *output= "xxxxxxxxx";
Time t;
t=getTime();
switch (t.dow)
{
case MONDAY:
output="Monday";
break;
case TUESDAY:
output="Tuesday";
break;
case WEDNESDAY:
output="Wednesday";
break;
case THURSDAY:
output="Thursday";
break;
case FRIDAY:
output="Friday";
break;
case SATURDAY:
output="Saturday";
break;
case SUNDAY:
output="Sunday";
break;
}
if (format==FORMAT_SHORT)
output[3]=0;
return output;
}
char *DS1302::getMonthStr(uint8_t format)
{
char *output= "xxxxxxxxx";
Time t;
t=getTime();
switch (t.mon)
{
case 1:
output="January";
break;
case 2:
output="February";
break;
case 3:
output="March";
break;
case 4:
output="April";
break;
case 5:
output="May";
break;
case 6:
output="June";
break;
case 7:
output="July";
break;
case 8:
output="August";
break;
case 9:
output="September";
break;
case 10:
output="October";
break;
case 11:
output="November";
break;
case 12:
output="December";
break;
}
if (format==FORMAT_SHORT)
output[3]=0;
return output;
}
void DS1302::halt(bool enable)
{
uint8_t _reg = _readRegister(REG_SEC);
_reg &= ~(1 << 7);
_reg |= (enable << 7);
_writeRegister(REG_SEC, _reg);
}
void DS1302::writeProtect(bool enable)
{
uint8_t _reg = (enable << 7);
_writeRegister(REG_WP, _reg);
}
void DS1302::setTCR(uint8_t value)
{
_writeRegister(REG_TCR, value);
}
/* Private */
uint8_t DS1302::_readByte()
{
pinMode(_data_pin, INPUT);
uint8_t value = 0;
uint8_t currentBit = 0;
for (int i = 0; i < 8; ++i)
{
currentBit = digitalRead(_data_pin);
value |= (currentBit << i);
digitalWrite(_sclk_pin, HIGH);
delayMicroseconds(1);
digitalWrite(_sclk_pin, LOW);
}
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