Angel David Yaguana Hernandez / DS1307

Libreria para trabajar con DS1307 y usar su memoria

Dependents:   Proyect_Patric_electronic_door_MSC_Ok_ESP

ds1307.cpp@0:ab60603c51d1, 2013-09-17 (annotated)

Committer:
sherckuith
Date:
Tue Sep 17 01:31:17 2013 +0000
Revision:
0:ab60603c51d1
Arreglos minimos;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sherckuith 0:ab60603c51d1 1 #include "ds1307.h"
sherckuith 0:ab60603c51d1 2
sherckuith 0:ab60603c51d1 3 DS1307::DS1307(PinName sda, PinName scl ) : ds1307i2c(sda,scl)
sherckuith 0:ab60603c51d1 4 {
sherckuith 0:ab60603c51d1 5 ds1307i2c.frequency(DS1307_freq);
sherckuith 0:ab60603c51d1 6 }
sherckuith 0:ab60603c51d1 7
sherckuith 0:ab60603c51d1 8 DS1307::~DS1307()
sherckuith 0:ab60603c51d1 9 {
sherckuith 0:ab60603c51d1 10 }
sherckuith 0:ab60603c51d1 11
sherckuith 0:ab60603c51d1 12 int DS1307::read( int addr, int quantity, char *data)
sherckuith 0:ab60603c51d1 13 {
sherckuith 0:ab60603c51d1 14 // note the char array at data must contain 63 locations or unpredictable behavior will happen
sherckuith 0:ab60603c51d1 15 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 16 // quantity must be 1 - 63 as the 64th ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 17 int test = 0 ;
sherckuith 0:ab60603c51d1 18 char temp_data[65];
sherckuith 0:ab60603c51d1 19
sherckuith 0:ab60603c51d1 20 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
sherckuith 0:ab60603c51d1 21 if (addr < 0 ) return (1); // fail because address less then 0 is not available
sherckuith 0:ab60603c51d1 22 if (quantity > DS1307_lastreg) return (1); // fail because quantity greater then what can be read
sherckuith 0:ab60603c51d1 23 if ((addr + quantity) > DS1307_lastreg ) return (1); // fail because cant read past reg 63
sherckuith 0:ab60603c51d1 24 if ( quantity == 0 ) return (1); // fail because zero quantity wanted
sherckuith 0:ab60603c51d1 25 temp_data[0] = DS1307_lastreg ; // note this ram location is used to set the addressing pointer in DS1307
sherckuith 0:ab60603c51d1 26 temp_data[1] = 0; // just junk to clober this address with
sherckuith 0:ab60603c51d1 27 test = ds1307i2c.write(DS1307_addr,temp_data,2);
sherckuith 0:ab60603c51d1 28 if (test == 1) return (1); // the write operation failed
sherckuith 0:ab60603c51d1 29 //ds1307i2c.stop(); // now the DS1307 is pointing to the first register
sherckuith 0:ab60603c51d1 30 if ( addr != 0 ) test = ds1307i2c.read(DS1307_addr,temp_data,addr); // now the DS1307 address pointer is pointing to correct address
sherckuith 0:ab60603c51d1 31 if (test == 1) return (1); // the read operation failed
sherckuith 0:ab60603c51d1 32 test = ds1307i2c.read(DS1307_addr,data,quantity); // read the DS1307 registers now
sherckuith 0:ab60603c51d1 33 if (test == 1) return (1); // read operation failed
sherckuith 0:ab60603c51d1 34 return(0); // looks like the data read was good
sherckuith 0:ab60603c51d1 35 }
sherckuith 0:ab60603c51d1 36
sherckuith 0:ab60603c51d1 37 void DS1307::stop()
sherckuith 0:ab60603c51d1 38 {
sherckuith 0:ab60603c51d1 39
sherckuith 0:ab60603c51d1 40 }
sherckuith 0:ab60603c51d1 41
sherckuith 0:ab60603c51d1 42 int DS1307::read(int addr, int *data)
sherckuith 0:ab60603c51d1 43 {
sherckuith 0:ab60603c51d1 44 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 45 int test = 0;
sherckuith 0:ab60603c51d1 46 char temp_data[65];
sherckuith 0:ab60603c51d1 47 test = DS1307::read(addr, 1, &temp_data[0]);
sherckuith 0:ab60603c51d1 48 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 49 *data = (int)temp_data[0]; // returing the read data by pointer
sherckuith 0:ab60603c51d1 50 return (0); // the single read is successfull
sherckuith 0:ab60603c51d1 51 }
sherckuith 0:ab60603c51d1 52
sherckuith 0:ab60603c51d1 53 int DS1307::write( int addr, int quantity, char *data)
sherckuith 0:ab60603c51d1 54 {
sherckuith 0:ab60603c51d1 55 // note the char array at data must contain 63 locations or unpredictable behavior will happen
sherckuith 0:ab60603c51d1 56 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 57 // quantity must be 1 - 63 as the 64th ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 58 int test = 0 ;
sherckuith 0:ab60603c51d1 59 char temp_data[65] ;
sherckuith 0:ab60603c51d1 60 int loop = 0;
sherckuith 0:ab60603c51d1 61
sherckuith 0:ab60603c51d1 62 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
sherckuith 0:ab60603c51d1 63 if (addr < 0 ) return (1); // fail because address less then 0 is not available
sherckuith 0:ab60603c51d1 64 if (quantity > DS1307_lastreg) return (1); // fail because quantity greater then what can be read
sherckuith 0:ab60603c51d1 65 if (quantity == 0) return (1); // fail because zero quantity is wanted
sherckuith 0:ab60603c51d1 66 if ((addr + quantity) > DS1307_lastreg ) return (1); // fail because cant read past reg 63
sherckuith 0:ab60603c51d1 67
sherckuith 0:ab60603c51d1 68 temp_data[0] = (char)addr;
sherckuith 0:ab60603c51d1 69 for ( ; loop < quantity ; loop++ ) {
sherckuith 0:ab60603c51d1 70 temp_data[loop+1] = *(data + loop);
sherckuith 0:ab60603c51d1 71 }
sherckuith 0:ab60603c51d1 72 test = ds1307i2c.write(DS1307_addr, temp_data, (quantity + 1));
sherckuith 0:ab60603c51d1 73 //ds1307i2c.stop();
sherckuith 0:ab60603c51d1 74 return(test); // 0 for success 1 for failure to write
sherckuith 0:ab60603c51d1 75 }
sherckuith 0:ab60603c51d1 76
sherckuith 0:ab60603c51d1 77 int DS1307::write( int addr, int data )
sherckuith 0:ab60603c51d1 78 {
sherckuith 0:ab60603c51d1 79 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
sherckuith 0:ab60603c51d1 80 int test = 0 ;
sherckuith 0:ab60603c51d1 81 char temp_data[2] ;
sherckuith 0:ab60603c51d1 82
sherckuith 0:ab60603c51d1 83 temp_data[0] = (char)addr;
sherckuith 0:ab60603c51d1 84 temp_data[1] = (char)data;
sherckuith 0:ab60603c51d1 85 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
sherckuith 0:ab60603c51d1 86 if (addr < 0 ) return (1); // fail because address less then 0 is not available
sherckuith 0:ab60603c51d1 87 test = ds1307i2c.write(DS1307_addr, temp_data, 2);
sherckuith 0:ab60603c51d1 88 //ds1307i2c.stop();
sherckuith 0:ab60603c51d1 89 return(test);
sherckuith 0:ab60603c51d1 90 }
sherckuith 0:ab60603c51d1 91
sherckuith 0:ab60603c51d1 92 int DS1307::start_clock(void) // start the clock
sherckuith 0:ab60603c51d1 93 {
sherckuith 0:ab60603c51d1 94 int test = 0;
sherckuith 0:ab60603c51d1 95 int junk = 0;
sherckuith 0:ab60603c51d1 96
sherckuith 0:ab60603c51d1 97 test = DS1307::read(DS1307_sec, &junk);
sherckuith 0:ab60603c51d1 98 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 99 junk = ( 0x7F & junk); // basicaly i mask bit 8 to set it to zero
sherckuith 0:ab60603c51d1 100 test = DS1307::write(DS1307_sec,junk); // now write the seconds back to register and because bit 8 is zero this starts clock.
sherckuith 0:ab60603c51d1 101 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 102 return(test); //
sherckuith 0:ab60603c51d1 103 }
sherckuith 0:ab60603c51d1 104
sherckuith 0:ab60603c51d1 105 int DS1307::stop_clock(void) // stop clock
sherckuith 0:ab60603c51d1 106 {
sherckuith 0:ab60603c51d1 107 int test = 0;
sherckuith 0:ab60603c51d1 108 int junk = 0;
sherckuith 0:ab60603c51d1 109
sherckuith 0:ab60603c51d1 110 test = DS1307::read(DS1307_sec, &junk);
sherckuith 0:ab60603c51d1 111 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 112 junk = ( 0x7F & junk); // basicaly i mask bit 8 to set it to zero but keep all other bits
sherckuith 0:ab60603c51d1 113 junk = ( 0x80 | junk); // basicaly i mask bit 8 to set it to one
sherckuith 0:ab60603c51d1 114 test = DS1307::write(DS1307_sec,junk); // now write the seconds back to register and because bit 8 is one this starts clock.
sherckuith 0:ab60603c51d1 115 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 116 return(test); //
sherckuith 0:ab60603c51d1 117 }
sherckuith 0:ab60603c51d1 118
sherckuith 0:ab60603c51d1 119 int DS1307::twelve_hour(void) // set 12 hour mode
sherckuith 0:ab60603c51d1 120 {
sherckuith 0:ab60603c51d1 121 int test = 0;
sherckuith 0:ab60603c51d1 122 int junk = 0;
sherckuith 0:ab60603c51d1 123
sherckuith 0:ab60603c51d1 124 test = DS1307::read(DS1307_hour, &junk);
sherckuith 0:ab60603c51d1 125 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 126 if ((junk & 0x40) == 0x40) return(0); // return because 12 mode is active now all done!
sherckuith 0:ab60603c51d1 127
sherckuith 0:ab60603c51d1 128 junk = ( junk & 0x3F); // only use 24 hour time values
sherckuith 0:ab60603c51d1 129 if (junk == 0x00)
sherckuith 0:ab60603c51d1 130 junk = 0x12;
sherckuith 0:ab60603c51d1 131 else if (junk >= 0x13)
sherckuith 0:ab60603c51d1 132 if (junk < 0x20) {
sherckuith 0:ab60603c51d1 133 junk = junk - 0x12;
sherckuith 0:ab60603c51d1 134 junk = (junk | 0x20); // add back the pm indicator
sherckuith 0:ab60603c51d1 135 } else
sherckuith 0:ab60603c51d1 136 switch (junk) {
sherckuith 0:ab60603c51d1 137 case 0x20:
sherckuith 0:ab60603c51d1 138 junk = 0x28;
sherckuith 0:ab60603c51d1 139 break;
sherckuith 0:ab60603c51d1 140 case 0x21:
sherckuith 0:ab60603c51d1 141 junk = 0x29;
sherckuith 0:ab60603c51d1 142 break;
sherckuith 0:ab60603c51d1 143 case 0x22:
sherckuith 0:ab60603c51d1 144 junk = 0x30;
sherckuith 0:ab60603c51d1 145 break;
sherckuith 0:ab60603c51d1 146 case 0x23:
sherckuith 0:ab60603c51d1 147 junk = 0x31;
sherckuith 0:ab60603c51d1 148 break;
sherckuith 0:ab60603c51d1 149 }
sherckuith 0:ab60603c51d1 150
sherckuith 0:ab60603c51d1 151 test = DS1307::write(DS1307_hour,(0x40 | junk)); // set bit 6 with the new 12 hour time converted from the 24 hour time
sherckuith 0:ab60603c51d1 152 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 153
sherckuith 0:ab60603c51d1 154 return(0);
sherckuith 0:ab60603c51d1 155 }
sherckuith 0:ab60603c51d1 156
sherckuith 0:ab60603c51d1 157 int DS1307::twentyfour_hour(void) // set 24 hour mode
sherckuith 0:ab60603c51d1 158 {
sherckuith 0:ab60603c51d1 159 int test = 0;
sherckuith 0:ab60603c51d1 160 int junk = 0;
sherckuith 0:ab60603c51d1 161
sherckuith 0:ab60603c51d1 162 test = DS1307::read(DS1307_hour, &junk);
sherckuith 0:ab60603c51d1 163 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 164 if ((junk & 0x40) == 0) return(0); // return because 24 mode is active now all done!
sherckuith 0:ab60603c51d1 165
sherckuith 0:ab60603c51d1 166 junk = (junk & 0xBF); // get value bits and am/pm indicator bit but drop 12/24 hour bit
sherckuith 0:ab60603c51d1 167
sherckuith 0:ab60603c51d1 168 if (junk > 0x12)
sherckuith 0:ab60603c51d1 169 if ( junk <= 0x27 )
sherckuith 0:ab60603c51d1 170 junk = junk - 0x0E;
sherckuith 0:ab60603c51d1 171 else
sherckuith 0:ab60603c51d1 172 junk = junk - 0x08;
sherckuith 0:ab60603c51d1 173
sherckuith 0:ab60603c51d1 174 test = DS1307::write(DS1307_hour,( 0xBF & junk)); // clear bit 6 and set the new 24 hour time converted from 12 hour time
sherckuith 0:ab60603c51d1 175 if (test == 1) return(1); // fail because read to DS1307 failed
sherckuith 0:ab60603c51d1 176
sherckuith 0:ab60603c51d1 177 return(0);
sherckuith 0:ab60603c51d1 178 }
sherckuith 0:ab60603c51d1 179
sherckuith 0:ab60603c51d1 180 int DS1307::settime(int sec, int min, int hour, int day, int date, int month, int year) // to set the current time and start clock
sherckuith 0:ab60603c51d1 181 {
sherckuith 0:ab60603c51d1 182 // sec = 0 to 59, min = 0 to 59, hours = 0 to 23 ( 24 hour mode only ), day = 1 to 7 ( day of week ), date = 1 to 31, month = 1 to 12, year 0 to 99 ( this is for 2000 to 2099)
sherckuith 0:ab60603c51d1 183 DS1307::stop_clock();
sherckuith 0:ab60603c51d1 184
sherckuith 0:ab60603c51d1 185 if (1 == DS1307::hilow_check( 59, 0, sec)) {
sherckuith 0:ab60603c51d1 186 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 187 } else {
sherckuith 0:ab60603c51d1 188 if (1 == (DS1307::write(DS1307_sec,DS1307::dectobcd(sec)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 189 }
sherckuith 0:ab60603c51d1 190
sherckuith 0:ab60603c51d1 191 if (1 == DS1307::hilow_check( 59, 0, min)) {
sherckuith 0:ab60603c51d1 192 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 193 } else {
sherckuith 0:ab60603c51d1 194 if (1 == (DS1307::write(DS1307_min,DS1307::dectobcd(min)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 195 }
sherckuith 0:ab60603c51d1 196
sherckuith 0:ab60603c51d1 197 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour format
sherckuith 0:ab60603c51d1 198 if (1 == DS1307::hilow_check( 23, 0, hour)) { // note setting 24 hour mode befor and after writing the hour value ensures 24 hour mode is set
sherckuith 0:ab60603c51d1 199 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 200 } else {
sherckuith 0:ab60603c51d1 201 if (1 == (DS1307::write(DS1307_hour,DS1307::dectobcd(hour)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 202 }
sherckuith 0:ab60603c51d1 203 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour format
sherckuith 0:ab60603c51d1 204
sherckuith 0:ab60603c51d1 205 if (1 == DS1307::hilow_check( 7, 1, day)) {
sherckuith 0:ab60603c51d1 206 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 207 } else {
sherckuith 0:ab60603c51d1 208 if (1 == (DS1307::write(DS1307_day,DS1307::dectobcd(day)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 209 }
sherckuith 0:ab60603c51d1 210
sherckuith 0:ab60603c51d1 211 if (1 == DS1307::hilow_check( 31, 1, date)) {
sherckuith 0:ab60603c51d1 212 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 213 } else {
sherckuith 0:ab60603c51d1 214 if (1 == (DS1307::write(DS1307_date,DS1307::dectobcd(date)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 215 }
sherckuith 0:ab60603c51d1 216
sherckuith 0:ab60603c51d1 217 if (1 == DS1307::hilow_check( 12, 1, month)) {
sherckuith 0:ab60603c51d1 218 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 219 } else {
sherckuith 0:ab60603c51d1 220 if (1 == (DS1307::write(DS1307_month,DS1307::dectobcd(month)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 221 }
sherckuith 0:ab60603c51d1 222
sherckuith 0:ab60603c51d1 223 if (1 == DS1307::hilow_check( 99, 0, year)) {
sherckuith 0:ab60603c51d1 224 return(1); // failed because recieved value is not in bounds
sherckuith 0:ab60603c51d1 225 } else {
sherckuith 0:ab60603c51d1 226 if (1 == (DS1307::write(DS1307_year,DS1307::dectobcd(year)))) return(1); // failed to write for some reason
sherckuith 0:ab60603c51d1 227 }
sherckuith 0:ab60603c51d1 228
sherckuith 0:ab60603c51d1 229 DS1307::start_clock();
sherckuith 0:ab60603c51d1 230 return (0); // time is now set
sherckuith 0:ab60603c51d1 231 }
sherckuith 0:ab60603c51d1 232
sherckuith 0:ab60603c51d1 233 int DS1307::gettime(int *sec, int *min, int *hour, int *day, int *date, int *month, int *year) // to get the current time information
sherckuith 0:ab60603c51d1 234 {
sherckuith 0:ab60603c51d1 235 // sec = 0 to 59, min = 0 to 59, hours = 0 to 23 ( 24 hour mode only ), day = 1 to 7 ( day of week ), date = 1 to 31, month = 1 to 12, year 0 to 99 ( this is for 2000 to 2099)
sherckuith 0:ab60603c51d1 236 if (1 == DS1307::read(DS1307_sec,sec)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 237 *sec = (*sec & 0x7F ); // drop the clock start stop bit
sherckuith 0:ab60603c51d1 238 *sec = DS1307::bcdtodec( *sec); // bcd is now dec value
sherckuith 0:ab60603c51d1 239
sherckuith 0:ab60603c51d1 240 if (1 == DS1307::read(DS1307_min,min)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 241 *min = (*min & 0x7F ); // drop bit 7 because it should be 0 anyways
sherckuith 0:ab60603c51d1 242 *min = DS1307::bcdtodec( *min); // bcd is now dec value
sherckuith 0:ab60603c51d1 243
sherckuith 0:ab60603c51d1 244 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 245 if ((*hour & 0x40) == 0x40) { // if true then 12 hour mode is set currently so change to 24 hour, read value, and return to 12 hour mode
sherckuith 0:ab60603c51d1 246 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour mode for some reason
sherckuith 0:ab60603c51d1 247 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 248 *hour = (*hour & 0x3F ); // drop bit 7 & 6 they are not used for 24 hour mode reading
sherckuith 0:ab60603c51d1 249 *hour = DS1307::bcdtodec( *hour); // bcd is now dec value
sherckuith 0:ab60603c51d1 250 if (1 == DS1307::twelve_hour()) return(1); // failed to return to 12 hour mode for some reason
sherckuith 0:ab60603c51d1 251 } else { // in 24 hour mode already so just read the hour value
sherckuith 0:ab60603c51d1 252 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 253 *hour = (*hour & 0x3F ); // drop bit 7 & 6 they are not used for 24 hour mode reading
sherckuith 0:ab60603c51d1 254 *hour = DS1307::bcdtodec( *hour); // bcd is now dec value
sherckuith 0:ab60603c51d1 255 }
sherckuith 0:ab60603c51d1 256
sherckuith 0:ab60603c51d1 257 if (1 == DS1307::read(DS1307_day,day)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 258 *day = (*day & 0x07 ); // drop the non used bits
sherckuith 0:ab60603c51d1 259 *day = DS1307::bcdtodec( *day); // bcd is now dec value
sherckuith 0:ab60603c51d1 260
sherckuith 0:ab60603c51d1 261 if (1 == DS1307::read(DS1307_date,date)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 262 *date = (*date & 0x3F ); // drop bit 6 and 7 not used for date value
sherckuith 0:ab60603c51d1 263 *date = DS1307::bcdtodec( *date); // bcd is now dec value
sherckuith 0:ab60603c51d1 264
sherckuith 0:ab60603c51d1 265 if (1 == DS1307::read(DS1307_month,month)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 266 *month = (*month & 0x1F ); // drop bit 5, 6 and 7 not used for month value
sherckuith 0:ab60603c51d1 267 *month = DS1307::bcdtodec( *month); // bcd is now dec value
sherckuith 0:ab60603c51d1 268
sherckuith 0:ab60603c51d1 269 if (1 == DS1307::read(DS1307_year,year)) return(1); // failed to read for some reason
sherckuith 0:ab60603c51d1 270 *year = DS1307::bcdtodec( *year); // bcd is now dec value
sherckuith 0:ab60603c51d1 271
sherckuith 0:ab60603c51d1 272 return (0); // data returned is valid
sherckuith 0:ab60603c51d1 273 }
sherckuith 0:ab60603c51d1 274
sherckuith 0:ab60603c51d1 275
sherckuith 0:ab60603c51d1 276 int DS1307::dectobcd( int dec)
sherckuith 0:ab60603c51d1 277 {
sherckuith 0:ab60603c51d1 278 int low = 0;
sherckuith 0:ab60603c51d1 279 int high = 0;
sherckuith 0:ab60603c51d1 280
sherckuith 0:ab60603c51d1 281 high = dec / 10; // this gives the high nibble value
sherckuith 0:ab60603c51d1 282 low = dec - (high * 10); // this gives the lower nibble value
sherckuith 0:ab60603c51d1 283 return ((high *16) + low); // this is the final bcd value but in interger format
sherckuith 0:ab60603c51d1 284 }
sherckuith 0:ab60603c51d1 285
sherckuith 0:ab60603c51d1 286 int DS1307::bcdtodec( int bcd)
sherckuith 0:ab60603c51d1 287 {
sherckuith 0:ab60603c51d1 288 int low = 0;
sherckuith 0:ab60603c51d1 289 int high = 0;
sherckuith 0:ab60603c51d1 290
sherckuith 0:ab60603c51d1 291 high = bcd / 16;
sherckuith 0:ab60603c51d1 292 low = bcd - (high * 16);
sherckuith 0:ab60603c51d1 293 return ((high * 10) + low);
sherckuith 0:ab60603c51d1 294
sherckuith 0:ab60603c51d1 295 }
sherckuith 0:ab60603c51d1 296
sherckuith 0:ab60603c51d1 297 int DS1307::hilow_check( int hi, int low, int value)
sherckuith 0:ab60603c51d1 298 {
sherckuith 0:ab60603c51d1 299 if ((value >= low)&(value <= hi))
sherckuith 0:ab60603c51d1 300 return(0); // value is equal to or inbetween hi and low
sherckuith 0:ab60603c51d1 301 else
sherckuith 0:ab60603c51d1 302 return(1); // value is not equal to or inbetween hi and low
sherckuith 0:ab60603c51d1 303 }