Hotboards MX / Hotboards_rtcc

library to control, set and read time and date from Hotboards rtcc board, wich contains the Microchip MCP7941x real time clock

Dependents:   Hotboards_rtcc_manual_timedate Hotboards_rtcc_timeSpan Hotboards_rtcc_alarm Hotboards_rtcc_compiler_timedate ... more

Hotboards_rtcc.cpp@1:0790bcaf8b8f, 2016-02-09 (annotated)

Committer:
Hotboards
Date:
Tue Feb 09 19:28:24 2016 +0000
Revision:
1:0790bcaf8b8f
Parent:
0:3a2ad459941a 
corrected a trouble with  the device adress:; ; #define RTC_ADDR          (uint8_t)(0xDE >> 1); #define EEPROM_ADDR       (uint8_t)(0xAE >> 1); ; ;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 0:3a2ad459941a 1 /*
Hotboards 0:3a2ad459941a 2 Hotboards_rtcc.cpp - Library to read, write and control the real time clock MCP7941x included in rtc board.
Hotboards 0:3a2ad459941a 3 http://hotboards.org
Hotboards 0:3a2ad459941a 4 adapted and taken from https://github.com/adafruit/RTClib
Hotboards 0:3a2ad459941a 5 Released into the public domain.
Hotboards 0:3a2ad459941a 6 */
Hotboards 0:3a2ad459941a 7
Hotboards 0:3a2ad459941a 8 #include "Hotboards_rtcc.h"
Hotboards 0:3a2ad459941a 9
Hotboards 0:3a2ad459941a 10
Hotboards 1:0790bcaf8b8f 11 #define RTC_ADDR (uint8_t)(0xDE)
Hotboards 1:0790bcaf8b8f 12 #define EEPROM_ADDR (uint8_t)(0xAE)
Hotboards 0:3a2ad459941a 13 #define RTC_STARTADDR (uint8_t)0x00
Hotboards 0:3a2ad459941a 14 #define ALARM_STARTADDR (uint8_t)0x0A
Hotboards 0:3a2ad459941a 15 #define CTRL_STARTADDR (uint8_t)0x07
Hotboards 0:3a2ad459941a 16 #define SRAM_SARTADDR (uint8_t)0x20
Hotboards 0:3a2ad459941a 17 #define EEPROM_SARTADDR (uint8_t)0x00
Hotboards 0:3a2ad459941a 18 #define PEEPROM_SARTADDR (uint8_t)0xF0
Hotboards 0:3a2ad459941a 19
Hotboards 0:3a2ad459941a 20 #define SECONDS_FROM_1970_TO_2000 946684800
Hotboards 0:3a2ad459941a 21
Hotboards 0:3a2ad459941a 22 const uint8_t daysInMonth[] = { 31,28,31,30,31,30,31,31,30,31,30,31 };
Hotboards 0:3a2ad459941a 23
Hotboards 0:3a2ad459941a 24 // number of days since 2000/01/01, valid for 2001..2099
Hotboards 0:3a2ad459941a 25 static uint16_t date2days(uint16_t y, uint8_t m, uint8_t d)
Hotboards 0:3a2ad459941a 26 {
Hotboards 0:3a2ad459941a 27 if (y >= 2000)
Hotboards 0:3a2ad459941a 28 y -= 2000;
Hotboards 0:3a2ad459941a 29 uint16_t days = d;
Hotboards 0:3a2ad459941a 30 for (uint8_t i = 1; i < m; ++i)
Hotboards 0:3a2ad459941a 31 days += daysInMonth[i - 1];
Hotboards 0:3a2ad459941a 32 if (m > 2 && y % 4 == 0)
Hotboards 0:3a2ad459941a 33 ++days;
Hotboards 0:3a2ad459941a 34 return days + 365 * y + (y + 3) / 4 - 1;
Hotboards 0:3a2ad459941a 35 }
Hotboards 0:3a2ad459941a 36
Hotboards 0:3a2ad459941a 37 static long time2long(uint16_t days, uint8_t h, uint8_t m, uint8_t s)
Hotboards 0:3a2ad459941a 38 {
Hotboards 0:3a2ad459941a 39 return ((days * 24L + h) * 60 + m) * 60 + s;
Hotboards 0:3a2ad459941a 40 }
Hotboards 0:3a2ad459941a 41
Hotboards 0:3a2ad459941a 42 static uint8_t conv2d(const char* p)
Hotboards 0:3a2ad459941a 43 {
Hotboards 0:3a2ad459941a 44 uint8_t v = 0;
Hotboards 0:3a2ad459941a 45 if ('0' <= *p && *p <= '9')
Hotboards 0:3a2ad459941a 46 v = *p - '0';
Hotboards 0:3a2ad459941a 47 return 10 * v + *++p - '0';
Hotboards 0:3a2ad459941a 48 }
Hotboards 0:3a2ad459941a 49
Hotboards 0:3a2ad459941a 50 /*
Hotboards 0:3a2ad459941a 51 * Constructor that use time in a 32 bit variable
Hotboards 0:3a2ad459941a 52 */
Hotboards 0:3a2ad459941a 53 DateTime::DateTime( uint32_t t )
Hotboards 0:3a2ad459941a 54 {
Hotboards 0:3a2ad459941a 55 t -= SECONDS_FROM_1970_TO_2000; // bring to 2000 timestamp from 1970
Hotboards 0:3a2ad459941a 56 ss = t % 60;
Hotboards 0:3a2ad459941a 57 t /= 60;
Hotboards 0:3a2ad459941a 58 mm = t % 60;
Hotboards 0:3a2ad459941a 59 t /= 60;
Hotboards 0:3a2ad459941a 60 hh = t % 24;
Hotboards 0:3a2ad459941a 61 uint16_t days = t / 24;
Hotboards 0:3a2ad459941a 62 uint8_t leap;
Hotboards 0:3a2ad459941a 63 for( yOff = 0 ; ; ++yOff )
Hotboards 0:3a2ad459941a 64 {
Hotboards 0:3a2ad459941a 65 leap = yOff % 4 == 0;
Hotboards 0:3a2ad459941a 66 if (days < 365 + leap)
Hotboards 0:3a2ad459941a 67 {
Hotboards 0:3a2ad459941a 68 break;
Hotboards 0:3a2ad459941a 69 }
Hotboards 0:3a2ad459941a 70 days -= 365 + leap;
Hotboards 0:3a2ad459941a 71 }
Hotboards 0:3a2ad459941a 72 for (m = 1; ; ++m)
Hotboards 0:3a2ad459941a 73 {
Hotboards 0:3a2ad459941a 74 uint8_t daysPerMonth = daysInMonth[m - 1];
Hotboards 0:3a2ad459941a 75 if (leap && m == 2)
Hotboards 0:3a2ad459941a 76 {
Hotboards 0:3a2ad459941a 77 ++daysPerMonth;
Hotboards 0:3a2ad459941a 78 }
Hotboards 0:3a2ad459941a 79 if (days < daysPerMonth)
Hotboards 0:3a2ad459941a 80 {
Hotboards 0:3a2ad459941a 81 break;
Hotboards 0:3a2ad459941a 82 }
Hotboards 0:3a2ad459941a 83 days -= daysPerMonth;
Hotboards 0:3a2ad459941a 84 }
Hotboards 0:3a2ad459941a 85 d = days + 1;
Hotboards 0:3a2ad459941a 86 }
Hotboards 0:3a2ad459941a 87
Hotboards 0:3a2ad459941a 88 /*
Hotboards 0:3a2ad459941a 89 * Constructor that use time variables for each element in decimal
Hotboards 0:3a2ad459941a 90 */
Hotboards 0:3a2ad459941a 91 DateTime::DateTime( uint16_t year, uint8_t month, uint8_t day,
Hotboards 0:3a2ad459941a 92 uint8_t hour, uint8_t min, uint8_t sec, uint8_t dweek )
Hotboards 0:3a2ad459941a 93 {
Hotboards 0:3a2ad459941a 94 if( year >= 2000 )
Hotboards 0:3a2ad459941a 95 {
Hotboards 0:3a2ad459941a 96 year -= 2000;
Hotboards 0:3a2ad459941a 97 }
Hotboards 0:3a2ad459941a 98 yOff = year;
Hotboards 0:3a2ad459941a 99 m = month;
Hotboards 0:3a2ad459941a 100 d = day;
Hotboards 0:3a2ad459941a 101 hh = hour;
Hotboards 0:3a2ad459941a 102 mm = min;
Hotboards 0:3a2ad459941a 103 ss = sec;
Hotboards 0:3a2ad459941a 104 dw = dweek;
Hotboards 0:3a2ad459941a 105 }
Hotboards 0:3a2ad459941a 106
Hotboards 0:3a2ad459941a 107 /*
Hotboards 0:3a2ad459941a 108 * Constructor tcreate a copy of DateTime object
Hotboards 0:3a2ad459941a 109 */
Hotboards 0:3a2ad459941a 110 DateTime::DateTime (const DateTime& copy):
Hotboards 0:3a2ad459941a 111 yOff(copy.yOff),
Hotboards 0:3a2ad459941a 112 m(copy.m),
Hotboards 0:3a2ad459941a 113 d(copy.d),
Hotboards 0:3a2ad459941a 114 hh(copy.hh),
Hotboards 0:3a2ad459941a 115 mm(copy.mm),
Hotboards 0:3a2ad459941a 116 ss(copy.ss)
Hotboards 0:3a2ad459941a 117 {}
Hotboards 0:3a2ad459941a 118
Hotboards 0:3a2ad459941a 119
Hotboards 0:3a2ad459941a 120 /*
Hotboards 0:3a2ad459941a 121 * A convenient constructor for using "the compiler's time":
Hotboards 0:3a2ad459941a 122 DateTime now (__DATE__, __TIME__);
Hotboards 0:3a2ad459941a 123 */
Hotboards 0:3a2ad459941a 124 DateTime::DateTime( const char* date, const char* time )
Hotboards 0:3a2ad459941a 125 {
Hotboards 0:3a2ad459941a 126 // sample input: date = "Dec 26 2009", time = "12:34:56"
Hotboards 0:3a2ad459941a 127 yOff = conv2d(date + 9);
Hotboards 0:3a2ad459941a 128 // Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hotboards 0:3a2ad459941a 129 switch( date[0] )
Hotboards 0:3a2ad459941a 130 {
Hotboards 0:3a2ad459941a 131 case 'J': m = date[1] == 'a' ? 1 : m = date[2] == 'n' ? 6 : 7; break;
Hotboards 0:3a2ad459941a 132 case 'F': m = 2; break;
Hotboards 0:3a2ad459941a 133 case 'A': m = date[2] == 'r' ? 4 : 8; break;
Hotboards 0:3a2ad459941a 134 case 'M': m = date[2] == 'r' ? 3 : 5; break;
Hotboards 0:3a2ad459941a 135 case 'S': m = 9; break;
Hotboards 0:3a2ad459941a 136 case 'O': m = 10; break;
Hotboards 0:3a2ad459941a 137 case 'N': m = 11; break;
Hotboards 0:3a2ad459941a 138 case 'D': m = 12; break;
Hotboards 0:3a2ad459941a 139 }
Hotboards 0:3a2ad459941a 140 d = conv2d( date + 4 );
Hotboards 0:3a2ad459941a 141 hh = conv2d( time );
Hotboards 0:3a2ad459941a 142 mm = conv2d( time + 3 );
Hotboards 0:3a2ad459941a 143 ss = conv2d( time + 6 );
Hotboards 0:3a2ad459941a 144 }
Hotboards 0:3a2ad459941a 145
Hotboards 0:3a2ad459941a 146 uint8_t DateTime::dayOfTheWeek( void ) const
Hotboards 0:3a2ad459941a 147 {
Hotboards 0:3a2ad459941a 148 uint16_t day = date2days( yOff, m, d );
Hotboards 0:3a2ad459941a 149
Hotboards 0:3a2ad459941a 150 return ( day + 6 ) % 7; // Jan 1, 2000 is a Saturday, i.e. returns 6
Hotboards 0:3a2ad459941a 151 }
Hotboards 0:3a2ad459941a 152
Hotboards 0:3a2ad459941a 153 uint32_t DateTime::unixtime( void ) const
Hotboards 0:3a2ad459941a 154 {
Hotboards 0:3a2ad459941a 155 uint32_t t;
Hotboards 0:3a2ad459941a 156 uint16_t days = date2days( yOff, m, d );
Hotboards 0:3a2ad459941a 157
Hotboards 0:3a2ad459941a 158 t = time2long(days, hh, mm, ss);
Hotboards 0:3a2ad459941a 159 t += SECONDS_FROM_1970_TO_2000; // seconds from 1970 to 2000
Hotboards 0:3a2ad459941a 160
Hotboards 0:3a2ad459941a 161 return t;
Hotboards 0:3a2ad459941a 162 }
Hotboards 0:3a2ad459941a 163
Hotboards 0:3a2ad459941a 164 uint32_t DateTime::secondstime( void ) const
Hotboards 0:3a2ad459941a 165 {
Hotboards 0:3a2ad459941a 166 uint32_t t;
Hotboards 0:3a2ad459941a 167 uint16_t days = date2days( yOff, m, d );
Hotboards 0:3a2ad459941a 168
Hotboards 0:3a2ad459941a 169 t = time2long( days, hh, mm, ss );
Hotboards 0:3a2ad459941a 170 return t;
Hotboards 0:3a2ad459941a 171 }
Hotboards 0:3a2ad459941a 172
Hotboards 0:3a2ad459941a 173
Hotboards 0:3a2ad459941a 174
Hotboards 0:3a2ad459941a 175
Hotboards 0:3a2ad459941a 176 DateTime DateTime::operator+(const TimeSpan& span)
Hotboards 0:3a2ad459941a 177 {
Hotboards 0:3a2ad459941a 178 return DateTime(unixtime()+span.totalseconds());
Hotboards 0:3a2ad459941a 179 }
Hotboards 0:3a2ad459941a 180
Hotboards 0:3a2ad459941a 181 DateTime DateTime::operator-(const TimeSpan& span)
Hotboards 0:3a2ad459941a 182 {
Hotboards 0:3a2ad459941a 183 return DateTime(unixtime()-span.totalseconds());
Hotboards 0:3a2ad459941a 184 }
Hotboards 0:3a2ad459941a 185
Hotboards 0:3a2ad459941a 186 TimeSpan DateTime::operator-(const DateTime& right)
Hotboards 0:3a2ad459941a 187 {
Hotboards 0:3a2ad459941a 188 return TimeSpan(unixtime()-right.unixtime());
Hotboards 0:3a2ad459941a 189 }
Hotboards 0:3a2ad459941a 190
Hotboards 0:3a2ad459941a 191
Hotboards 0:3a2ad459941a 192
Hotboards 0:3a2ad459941a 193 TimeSpan::TimeSpan (int32_t seconds):
Hotboards 0:3a2ad459941a 194 _seconds(seconds)
Hotboards 0:3a2ad459941a 195 {}
Hotboards 0:3a2ad459941a 196
Hotboards 0:3a2ad459941a 197 TimeSpan::TimeSpan (int16_t days, int8_t hours, int8_t minutes, int8_t seconds):
Hotboards 0:3a2ad459941a 198 _seconds((int32_t)days*86400L + (int32_t)hours*3600 + (int32_t)minutes*60 + seconds)
Hotboards 0:3a2ad459941a 199 {}
Hotboards 0:3a2ad459941a 200
Hotboards 0:3a2ad459941a 201 TimeSpan::TimeSpan (const TimeSpan& copy):
Hotboards 0:3a2ad459941a 202 _seconds(copy._seconds)
Hotboards 0:3a2ad459941a 203 {}
Hotboards 0:3a2ad459941a 204
Hotboards 0:3a2ad459941a 205 TimeSpan TimeSpan::operator+(const TimeSpan& right)
Hotboards 0:3a2ad459941a 206 {
Hotboards 0:3a2ad459941a 207 return TimeSpan(_seconds+right._seconds);
Hotboards 0:3a2ad459941a 208 }
Hotboards 0:3a2ad459941a 209
Hotboards 0:3a2ad459941a 210 TimeSpan TimeSpan::operator-(const TimeSpan& right)
Hotboards 0:3a2ad459941a 211 {
Hotboards 0:3a2ad459941a 212 return TimeSpan(_seconds-right._seconds);
Hotboards 0:3a2ad459941a 213 }
Hotboards 0:3a2ad459941a 214
Hotboards 0:3a2ad459941a 215
Hotboards 0:3a2ad459941a 216
Hotboards 0:3a2ad459941a 217 Hotboards_rtcc::Hotboards_rtcc( I2C &i2c )
Hotboards 0:3a2ad459941a 218 : _i2c(i2c)
Hotboards 0:3a2ad459941a 219 {
Hotboards 0:3a2ad459941a 220 on_off = 0;
Hotboards 0:3a2ad459941a 221 }
Hotboards 0:3a2ad459941a 222 /*
Hotboards 0:3a2ad459941a 223 * enable internal oscilator if this is disable (start the clock)
Hotboards 0:3a2ad459941a 224 */
Hotboards 0:3a2ad459941a 225 void Hotboards_rtcc::begin( void )
Hotboards 0:3a2ad459941a 226 {
Hotboards 0:3a2ad459941a 227 if( isrunning( ) == 0 )
Hotboards 0:3a2ad459941a 228 {
Hotboards 0:3a2ad459941a 229 writeReg( RTC_STARTADDR, 0x80 );
Hotboards 0:3a2ad459941a 230 }
Hotboards 0:3a2ad459941a 231 }
Hotboards 0:3a2ad459941a 232
Hotboards 0:3a2ad459941a 233 /*
Hotboards 0:3a2ad459941a 234 * set a new time and date
Hotboards 0:3a2ad459941a 235 */
Hotboards 0:3a2ad459941a 236 void Hotboards_rtcc::adjust( const DateTime &dt )
Hotboards 0:3a2ad459941a 237 {
Hotboards 0:3a2ad459941a 238 char buffer[8];
Hotboards 0:3a2ad459941a 239
Hotboards 0:3a2ad459941a 240 buffer[0] = RTC_STARTADDR;
Hotboards 0:3a2ad459941a 241 buffer[1] = bin2bcd(dt.second()) | 0x80;
Hotboards 0:3a2ad459941a 242 buffer[2] = bin2bcd(dt.minute());
Hotboards 0:3a2ad459941a 243 buffer[3] = bin2bcd(dt.hour());
Hotboards 0:3a2ad459941a 244 buffer[4] = bin2bcd(dt.dayOfTheWeek()) | on_off;
Hotboards 0:3a2ad459941a 245 buffer[5] = bin2bcd(dt.day());
Hotboards 0:3a2ad459941a 246 buffer[6] = bin2bcd(dt.month());
Hotboards 0:3a2ad459941a 247 buffer[7] = bin2bcd(dt.year() - 2000);
Hotboards 0:3a2ad459941a 248
Hotboards 0:3a2ad459941a 249 stop();
Hotboards 0:3a2ad459941a 250 _i2c.write( RTC_ADDR, buffer, 8 );
Hotboards 0:3a2ad459941a 251 }
Hotboards 0:3a2ad459941a 252
Hotboards 0:3a2ad459941a 253 /*
Hotboards 0:3a2ad459941a 254 * return an DateTime object with the actual time and date
Hotboards 0:3a2ad459941a 255 */
Hotboards 0:3a2ad459941a 256 DateTime Hotboards_rtcc::now( void )
Hotboards 0:3a2ad459941a 257 {
Hotboards 0:3a2ad459941a 258 char buffer[7];
Hotboards 0:3a2ad459941a 259
Hotboards 0:3a2ad459941a 260 buffer[0] = RTC_STARTADDR;
Hotboards 0:3a2ad459941a 261 _i2c.write(RTC_ADDR, buffer, 1, true);
Hotboards 0:3a2ad459941a 262 _i2c.read(RTC_ADDR, buffer, 7, false);
Hotboards 0:3a2ad459941a 263
Hotboards 0:3a2ad459941a 264 uint8_t ss = bcd2bin( buffer[0] & 0x7F );
Hotboards 0:3a2ad459941a 265 uint8_t mm = bcd2bin( buffer[1] );
Hotboards 0:3a2ad459941a 266 uint8_t hh = bcd2bin( buffer[2] );
Hotboards 0:3a2ad459941a 267 uint8_t dw = buffer[3] & 0x07;
Hotboards 0:3a2ad459941a 268 uint8_t d = bcd2bin( buffer[4] );
Hotboards 0:3a2ad459941a 269 uint8_t m = bcd2bin( buffer[5] & 0xDF );
Hotboards 0:3a2ad459941a 270 uint16_t y = bcd2bin( buffer[6] ) + 2000;
Hotboards 0:3a2ad459941a 271
Hotboards 0:3a2ad459941a 272 return DateTime( y, m, d, hh, mm, ss, dw );
Hotboards 0:3a2ad459941a 273 }
Hotboards 0:3a2ad459941a 274
Hotboards 0:3a2ad459941a 275 /*
Hotboards 0:3a2ad459941a 276 * return a true if the rtcc is running
Hotboards 0:3a2ad459941a 277 */
Hotboards 0:3a2ad459941a 278 uint8_t Hotboards_rtcc::isrunning( void )
Hotboards 0:3a2ad459941a 279 {
Hotboards 0:3a2ad459941a 280 uint8_t running = readReg( RTC_STARTADDR + 3 ) & 0x20;
Hotboards 0:3a2ad459941a 281 return running >> 5;
Hotboards 0:3a2ad459941a 282 }
Hotboards 0:3a2ad459941a 283
Hotboards 0:3a2ad459941a 284 /*
Hotboards 0:3a2ad459941a 285 * stop the internal rtcc clock
Hotboards 0:3a2ad459941a 286 */
Hotboards 0:3a2ad459941a 287 void Hotboards_rtcc::stop( void )
Hotboards 0:3a2ad459941a 288 {
Hotboards 0:3a2ad459941a 289 writeReg( RTC_STARTADDR, 0x00 );
Hotboards 0:3a2ad459941a 290 while( isrunning( ) == 1 );
Hotboards 0:3a2ad459941a 291 }
Hotboards 0:3a2ad459941a 292
Hotboards 0:3a2ad459941a 293 void Hotboards_rtcc::setVBAT( uint8_t OnOff )
Hotboards 0:3a2ad459941a 294 {
Hotboards 0:3a2ad459941a 295 on_off = ( OnOff & 0x01 ) << 3;
Hotboards 0:3a2ad459941a 296 }
Hotboards 0:3a2ad459941a 297
Hotboards 0:3a2ad459941a 298 void Hotboards_rtcc::setAlarm( const DateTime &dt, uint8_t alarm )
Hotboards 0:3a2ad459941a 299 {
Hotboards 0:3a2ad459941a 300 char buffer[8];
Hotboards 0:3a2ad459941a 301
Hotboards 0:3a2ad459941a 302 buffer[0] = ALARM_STARTADDR;
Hotboards 0:3a2ad459941a 303 buffer[1] = bin2bcd(dt.second()) | 0x80;
Hotboards 0:3a2ad459941a 304 buffer[2] = bin2bcd(dt.minute());
Hotboards 0:3a2ad459941a 305 buffer[3] = bin2bcd(dt.hour());
Hotboards 0:3a2ad459941a 306 buffer[4] = bin2bcd(dt.dayOfTheWeek()) | on_off;
Hotboards 0:3a2ad459941a 307 buffer[5] = bin2bcd(dt.day());
Hotboards 0:3a2ad459941a 308 buffer[6] = bin2bcd(dt.month());
Hotboards 0:3a2ad459941a 309 buffer[7] = bin2bcd(dt.year() - 2000);
Hotboards 0:3a2ad459941a 310
Hotboards 0:3a2ad459941a 311 _i2c.write( RTC_ADDR, buffer, 8 );
Hotboards 0:3a2ad459941a 312 }
Hotboards 0:3a2ad459941a 313
Hotboards 0:3a2ad459941a 314 uint8_t Hotboards_rtcc::getAlarmStatus( uint8_t alarm )
Hotboards 0:3a2ad459941a 315 {
Hotboards 0:3a2ad459941a 316 uint8_t status = readReg( ALARM_STARTADDR + 3 );
Hotboards 0:3a2ad459941a 317 return ( status >> 3 ) & 0x01;
Hotboards 0:3a2ad459941a 318 }
Hotboards 0:3a2ad459941a 319
Hotboards 0:3a2ad459941a 320 void Hotboards_rtcc::clearAlarm( uint8_t alarm )
Hotboards 0:3a2ad459941a 321 {
Hotboards 0:3a2ad459941a 322 uint8_t status = readReg( ALARM_STARTADDR + 3 );
Hotboards 0:3a2ad459941a 323 writeReg( ALARM_STARTADDR + 3, (status & 0xF7) );
Hotboards 0:3a2ad459941a 324 }
Hotboards 0:3a2ad459941a 325
Hotboards 0:3a2ad459941a 326 void Hotboards_rtcc::turnOnAlarm( uint8_t alarm )
Hotboards 0:3a2ad459941a 327 {
Hotboards 0:3a2ad459941a 328 uint8_t ctrl = readReg( CTRL_STARTADDR );
Hotboards 0:3a2ad459941a 329 writeReg( CTRL_STARTADDR, ctrl | 0x10 );
Hotboards 0:3a2ad459941a 330 }
Hotboards 0:3a2ad459941a 331
Hotboards 0:3a2ad459941a 332 void Hotboards_rtcc::turnOffAlarm( uint8_t alarm )
Hotboards 0:3a2ad459941a 333 {
Hotboards 0:3a2ad459941a 334 uint8_t ctrl = readReg( CTRL_STARTADDR );
Hotboards 0:3a2ad459941a 335 writeReg( CTRL_STARTADDR, ctrl & 0xEF );
Hotboards 0:3a2ad459941a 336 }
Hotboards 0:3a2ad459941a 337
Hotboards 0:3a2ad459941a 338 uint8_t Hotboards_rtcc::readReg( uint8_t address )
Hotboards 0:3a2ad459941a 339 {
Hotboards 0:3a2ad459941a 340 char buffer[1];
Hotboards 0:3a2ad459941a 341
Hotboards 0:3a2ad459941a 342 buffer[0] = address;
Hotboards 0:3a2ad459941a 343 _i2c.write(RTC_ADDR, buffer, 1, true);
Hotboards 0:3a2ad459941a 344 _i2c.read(RTC_ADDR, buffer, 1, false);
Hotboards 0:3a2ad459941a 345
Hotboards 0:3a2ad459941a 346 return buffer[0];
Hotboards 0:3a2ad459941a 347 }
Hotboards 0:3a2ad459941a 348
Hotboards 0:3a2ad459941a 349 void Hotboards_rtcc::writeReg( uint8_t address, uint8_t val )
Hotboards 0:3a2ad459941a 350 {
Hotboards 0:3a2ad459941a 351 char buffer[2];
Hotboards 0:3a2ad459941a 352
Hotboards 0:3a2ad459941a 353 buffer[0] = address;
Hotboards 0:3a2ad459941a 354 buffer[1] = val;
Hotboards 0:3a2ad459941a 355
Hotboards 0:3a2ad459941a 356 _i2c.write( RTC_ADDR, buffer, 2 );
Hotboards 0:3a2ad459941a 357 }
Hotboards 0:3a2ad459941a 358
Hotboards 0:3a2ad459941a 359 uint8_t Hotboards_rtcc::bcd2bin( uint8_t val )
Hotboards 0:3a2ad459941a 360 {
Hotboards 0:3a2ad459941a 361 return val - 6 * ( val >> 4 );
Hotboards 0:3a2ad459941a 362 }
Hotboards 0:3a2ad459941a 363
Hotboards 0:3a2ad459941a 364 uint8_t Hotboards_rtcc::bin2bcd( uint8_t val )
Hotboards 0:3a2ad459941a 365 {
Hotboards 0:3a2ad459941a 366 return val + 6 * ( val / 10 );
Hotboards 0:3a2ad459941a 367
Hotboards 0:3a2ad459941a 368 }