Dennis Smith / Mbed 2 deprecated NixieClock800Max

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Dependencies:   PCF8583_rtc mbed

PCF8583_rtc.cpp@1:a8b9fb95696b, 2014-02-13 (annotated)

Committer:
dennyem
Date:
Thu Feb 13 21:46:08 2014 +0000
Revision:
1:a8b9fb95696b
Parent:
0:f09cf90def53 
1st cut 14feb2014

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dennyem 0:f09cf90def53 1 /*********************************************************************************
dennyem 0:f09cf90def53 2 * An mbed class to control the PCF8583 Real time Clock/Calender
dennyem 0:f09cf90def53 3 * Copyright (c) 2014 Dennis (Denny) Smith - dennyem
dennyem 0:f09cf90def53 4 *
dennyem 0:f09cf90def53 5 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dennyem 0:f09cf90def53 6 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dennyem 0:f09cf90def53 7 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
dennyem 0:f09cf90def53 8 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dennyem 0:f09cf90def53 9 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
dennyem 0:f09cf90def53 10 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
dennyem 0:f09cf90def53 11 * THE SOFTWARE.
dennyem 0:f09cf90def53 12 *
dennyem 0:f09cf90def53 13 * 13.01.14 initial design for PIC devices using PICC compiler
dennyem 0:f09cf90def53 14 * 21.01.14 ported to mBed LPC1768 in 'C'
dennyem 0:f09cf90def53 15 * 09.02.14 converted to C++ and ported to mBed LPC812
dennyem 0:f09cf90def53 16 *
dennyem 0:f09cf90def53 17 * TODO
dennyem 0:f09cf90def53 18 * WriteNVram function is still to be tested
dennyem 0:f09cf90def53 19 * ReadNVram function is still to be tested
dennyem 0:f09cf90def53 20 * FormatDateTime needs am/pm, 12/24 hour parsing
dennyem 0:f09cf90def53 21 * Alarm functions not yet implemented
dennyem 0:f09cf90def53 22 */
dennyem 0:f09cf90def53 23
dennyem 0:f09cf90def53 24 #include <mbed.h>
dennyem 0:f09cf90def53 25 #include <PCF8583_rtc.h>
dennyem 0:f09cf90def53 26
dennyem 0:f09cf90def53 27 //-----------------------------------------------------------------------------
dennyem 0:f09cf90def53 28 // constructor -- accepts an I2c object to use for connection with the rtc
dennyem 1:a8b9fb95696b 29 PCF8583rtc::PCF8583rtc(I2C *i2c, char I2cAddress)
dennyem 0:f09cf90def53 30 {
dennyem 0:f09cf90def53 31 _i2c = i2c;
dennyem 1:a8b9fb95696b 32 _I2cAddress = I2cAddress;
dennyem 0:f09cf90def53 33
dennyem 0:f09cf90def53 34 ShortDateFormat = "d,m,yy";
dennyem 0:f09cf90def53 35 LongDateFormat = "dddd dd mmmm yyyy";
dennyem 0:f09cf90def53 36 ShortTimeFormat = "d:m:yy";
dennyem 0:f09cf90def53 37 LongTimeFormat = "dd:nn:yyyy";
dennyem 0:f09cf90def53 38
dennyem 0:f09cf90def53 39 DateSeparator = '/';
dennyem 0:f09cf90def53 40 TimeSeparator = ':';
dennyem 0:f09cf90def53 41
dennyem 0:f09cf90def53 42 ShortDayNames[0] = "Mon";
dennyem 0:f09cf90def53 43 ShortDayNames[1] = "Tue";
dennyem 0:f09cf90def53 44 ShortDayNames[2] = "Wed";
dennyem 0:f09cf90def53 45 ShortDayNames[3] = "Thu";
dennyem 0:f09cf90def53 46 ShortDayNames[4] = "Fri";
dennyem 0:f09cf90def53 47 ShortDayNames[5] = "Sat";
dennyem 0:f09cf90def53 48 ShortDayNames[6] = "Sun";
dennyem 0:f09cf90def53 49
dennyem 0:f09cf90def53 50 LongDayNames[0] = "Monday";
dennyem 0:f09cf90def53 51 LongDayNames[1] = "Tuesday";
dennyem 0:f09cf90def53 52 LongDayNames[2] = "Wednesday";
dennyem 0:f09cf90def53 53 LongDayNames[3] = "Thursday";
dennyem 0:f09cf90def53 54 LongDayNames[4] = "Friday";
dennyem 0:f09cf90def53 55 LongDayNames[5] = "Saturday";
dennyem 0:f09cf90def53 56 LongDayNames[6] = "Sunday";
dennyem 0:f09cf90def53 57
dennyem 1:a8b9fb95696b 58 ShortMonthNames[0] = "Jan";
dennyem 1:a8b9fb95696b 59 ShortMonthNames[1] = "Feb";
dennyem 1:a8b9fb95696b 60 ShortMonthNames[2] = "Mar";
dennyem 1:a8b9fb95696b 61 ShortMonthNames[3] = "Apr";
dennyem 1:a8b9fb95696b 62 ShortMonthNames[4] = "May";
dennyem 1:a8b9fb95696b 63 ShortMonthNames[5] = "Jun";
dennyem 1:a8b9fb95696b 64 ShortMonthNames[6] = "Jul";
dennyem 1:a8b9fb95696b 65 ShortMonthNames[7] = "Aug";
dennyem 1:a8b9fb95696b 66 ShortMonthNames[8] = "Sep";
dennyem 1:a8b9fb95696b 67 ShortMonthNames[9] = "Oct";
dennyem 0:f09cf90def53 68 ShortMonthNames[10] = "Nov";
dennyem 0:f09cf90def53 69 ShortMonthNames[11] = "Dec";
dennyem 0:f09cf90def53 70
dennyem 1:a8b9fb95696b 71 LongMonthNames[0] = "January";
dennyem 1:a8b9fb95696b 72 LongMonthNames[1] = "February";
dennyem 1:a8b9fb95696b 73 LongMonthNames[2] = "March";
dennyem 1:a8b9fb95696b 74 LongMonthNames[3] = "April";
dennyem 1:a8b9fb95696b 75 LongMonthNames[4] = "May";
dennyem 1:a8b9fb95696b 76 LongMonthNames[5] = "June";
dennyem 1:a8b9fb95696b 77 LongMonthNames[6] = "July";
dennyem 1:a8b9fb95696b 78 LongMonthNames[7] = "August";
dennyem 1:a8b9fb95696b 79 LongMonthNames[8] = "September";
dennyem 1:a8b9fb95696b 80 LongMonthNames[9] = "October";
dennyem 0:f09cf90def53 81 LongMonthNames[10] = "November";
dennyem 0:f09cf90def53 82 LongMonthNames[11] = "December";
dennyem 0:f09cf90def53 83 };
dennyem 0:f09cf90def53 84
dennyem 1:a8b9fb95696b 85 void PCF8583rtc::write(const char address, struct DateTime_t dti)
dennyem 0:f09cf90def53 86 {
dennyem 1:a8b9fb95696b 87 char tmp[8];
dennyem 1:a8b9fb95696b 88
dennyem 0:f09cf90def53 89 pauseCounting(); //Must stop counting before initialising Date/time
dennyem 0:f09cf90def53 90
dennyem 1:a8b9fb95696b 91 tmp[0] = address; // Address is 1 for Time or 10 for Alarm
dennyem 1:a8b9fb95696b 92
dennyem 1:a8b9fb95696b 93 //Values must be in BCD form
dennyem 1:a8b9fb95696b 94 tmp[1] = dti.time.hundreds; // Hundredths of a second
dennyem 1:a8b9fb95696b 95 tmp[2] = dti.time.seconds; // Seconds
dennyem 1:a8b9fb95696b 96 tmp[3] = dti.time.minutes; // Minutes
dennyem 1:a8b9fb95696b 97 tmp[4] = dti.time.hours; // Hours
dennyem 1:a8b9fb95696b 98 tmp[5] = dti.date.day & 0x3F; // Always set the 3 year bits to 0
dennyem 0:f09cf90def53 99
dennyem 0:f09cf90def53 100 if(address == TIME)
dennyem 1:a8b9fb95696b 101 tmp[6] = (((dti.date.weekday & 7) << 5 ) | dti.date.month); // Weekday/month
dennyem 0:f09cf90def53 102 else
dennyem 1:a8b9fb95696b 103 tmp[6] = dti.date.month & 0x1f; // No Weekday for alarm
dennyem 0:f09cf90def53 104
dennyem 1:a8b9fb95696b 105 _i2c->write(_I2cAddress, tmp, 7); // Address PCF8583, see PCF8583 datasheet
dennyem 0:f09cf90def53 106
dennyem 0:f09cf90def53 107 if(address == TIME) {
dennyem 1:a8b9fb95696b 108 writeByte(CENTURY_REG, dti.date.century); // Store the full 4 digit year in NV Ram
dennyem 1:a8b9fb95696b 109 writeByte(YEAR_REG, dti.date.year);
dennyem 0:f09cf90def53 110 };
dennyem 0:f09cf90def53 111
dennyem 0:f09cf90def53 112 enableCounting();
dennyem 0:f09cf90def53 113 };
dennyem 0:f09cf90def53 114
dennyem 0:f09cf90def53 115 //--------------------- Reads time and date information from RTC (PCF8583)
dennyem 1:a8b9fb95696b 116 struct DateTime_t PCF8583rtc::read(const char address)
dennyem 0:f09cf90def53 117 {
dennyem 0:f09cf90def53 118 char tmp[8];
dennyem 1:a8b9fb95696b 119 char year_bits = 0; // To test for year change
dennyem 0:f09cf90def53 120
dennyem 0:f09cf90def53 121 tmp[0] = address;
dennyem 1:a8b9fb95696b 122 _i2c->write(_I2cAddress, tmp, 1); // Address PCF8583, see PCF8583 datasheet
dennyem 1:a8b9fb95696b 123 _i2c->read(_I2cAddress | 1, tmp, 6); // Address PCF8583 for reading R/W=1
dennyem 0:f09cf90def53 124
dennyem 1:a8b9fb95696b 125 dt.time.hundreds = tmp[0];
dennyem 1:a8b9fb95696b 126 dt.time.seconds = tmp[1];
dennyem 1:a8b9fb95696b 127 dt.time.minutes = tmp[2];
dennyem 1:a8b9fb95696b 128 dt.time.hours = tmp[3] & 0x3F;
dennyem 1:a8b9fb95696b 129 dt.time.fmt_hours = tmp[3] & 0x80; // 12/24 hour format
dennyem 1:a8b9fb95696b 130 dt.time.am_pm_flag = tmp[3] & 0x40; // Am/Pm flag
dennyem 1:a8b9fb95696b 131 dt.date.day = tmp[4] & 0x3F; // Day of the Month
dennyem 1:a8b9fb95696b 132 dt.date.month = tmp[5] & 0x1F;
dennyem 0:f09cf90def53 133
dennyem 0:f09cf90def53 134 if(address == TIME)
dennyem 0:f09cf90def53 135 year_bits = (tmp[4] & 0xC0) >> 6;
dennyem 0:f09cf90def53 136 else
dennyem 0:f09cf90def53 137 dt.date.year = 0; // No year for alarm
dennyem 0:f09cf90def53 138
dennyem 0:f09cf90def53 139
dennyem 0:f09cf90def53 140 if(address == TIME)
dennyem 0:f09cf90def53 141 dt.date.weekday = tmp[5] >> 5;
dennyem 0:f09cf90def53 142 else
dennyem 0:f09cf90def53 143 dt.date.weekday = 0; // No weekday for alarm
dennyem 0:f09cf90def53 144
dennyem 0:f09cf90def53 145 if(address == TIME) {
dennyem 0:f09cf90def53 146 tmp[0] = readByte(CENTURY_REG);
dennyem 0:f09cf90def53 147 dt.date.century = ((tmp[0] & 0xF0) >> 4) * 10 + (tmp[0] & 0x0F);
dennyem 0:f09cf90def53 148 tmp[0] = readByte(YEAR_REG);
dennyem 0:f09cf90def53 149 dt.date.year = ((tmp[0] & 0xF0) >> 4) * 10 + (tmp[0] & 0x0F);
dennyem 0:f09cf90def53 150
dennyem 0:f09cf90def53 151 if(year_bits > 0) { // Midnight on new years eve?
dennyem 0:f09cf90def53 152 dt.date.year += 1; // Increment the year
dennyem 0:f09cf90def53 153 writeByte(YEAR_REG, dt.date.year); // Save the new year value to NV Ram
dennyem 0:f09cf90def53 154 writeByte(5, dt.date.day & 0x3F); // Clear the year bits but preserve the date
dennyem 0:f09cf90def53 155 }
dennyem 0:f09cf90def53 156 }
dennyem 1:a8b9fb95696b 157
dennyem 1:a8b9fb95696b 158 return dt;
dennyem 0:f09cf90def53 159 };
dennyem 0:f09cf90def53 160
dennyem 0:f09cf90def53 161 void PCF8583rtc::FormatDateTime(char *dest, char *f)
dennyem 0:f09cf90def53 162 {
dennyem 1:a8b9fb95696b 163 int i;
dennyem 1:a8b9fb95696b 164
dennyem 0:f09cf90def53 165 if(f != 0 && *f != 0) { //If the format param is empty then do a default 'c'
dennyem 0:f09cf90def53 166 while(*f != 0) { //expect null terminated string (we hope)
dennyem 0:f09cf90def53 167 switch(*f) {
dennyem 0:f09cf90def53 168 case 'c':
dennyem 0:f09cf90def53 169 break;
dennyem 0:f09cf90def53 170 case 'd':
dennyem 0:f09cf90def53 171 if(*(f+1) != 'd') { //'d' - Day with no leading zero
dennyem 1:a8b9fb95696b 172 dest += Bcd2Char(dest, dt.date.day, false);
dennyem 0:f09cf90def53 173 } else {
dennyem 0:f09cf90def53 174 f++;
dennyem 0:f09cf90def53 175 if(*(f+1) != 'd') //'dd' - Day with leading zero
dennyem 1:a8b9fb95696b 176 dest += Bcd2Char(dest, dt.date.day, true);
dennyem 0:f09cf90def53 177 else {
dennyem 0:f09cf90def53 178 f++;
dennyem 0:f09cf90def53 179 if(*(f+1) != 'd') { //'ddd' - Short day name
dennyem 1:a8b9fb95696b 180 i = 0;
dennyem 1:a8b9fb95696b 181 while(ShortDayNames[dt.date.weekday][i] != 0)
dennyem 1:a8b9fb95696b 182 *dest++ = ShortDayNames[dt.date.weekday][i++];
dennyem 0:f09cf90def53 183 } else {
dennyem 0:f09cf90def53 184 f++;
dennyem 1:a8b9fb95696b 185 i = 0;
dennyem 1:a8b9fb95696b 186 while(LongDayNames[dt.date.weekday][i] != 0)
dennyem 1:a8b9fb95696b 187 *dest++ = LongDayNames[dt.date.weekday][i++];
dennyem 0:f09cf90def53 188 }
dennyem 0:f09cf90def53 189 }
dennyem 0:f09cf90def53 190 }
dennyem 0:f09cf90def53 191 break;
dennyem 0:f09cf90def53 192 case 'm':
dennyem 0:f09cf90def53 193 if(*(f+1) != 'm') { //'m' - Month with no leading zero
dennyem 1:a8b9fb95696b 194 dest += Bcd2Char(dest, dt.date.month, false);
dennyem 0:f09cf90def53 195 } else {
dennyem 0:f09cf90def53 196 f++;
dennyem 0:f09cf90def53 197 if(*(f+1) != 'm') //'mm' - Month with leading zero
dennyem 1:a8b9fb95696b 198 dest += Bcd2Char(dest, dt.date.month, true);
dennyem 0:f09cf90def53 199 else {
dennyem 0:f09cf90def53 200 f++;
dennyem 0:f09cf90def53 201 if(*(f+1) != 'm') { //'mmm' - Short month name
dennyem 1:a8b9fb95696b 202 i = 0;
dennyem 1:a8b9fb95696b 203 while(ShortMonthNames[dt.date.month - 1][i] != 0)
dennyem 1:a8b9fb95696b 204 *dest++ = ShortMonthNames[dt.date.month - 1][i++];
dennyem 0:f09cf90def53 205 } else {
dennyem 0:f09cf90def53 206 f++;
dennyem 1:a8b9fb95696b 207 i = 0;
dennyem 1:a8b9fb95696b 208 while(LongMonthNames[dt.date.month - 1][i] != 0)
dennyem 1:a8b9fb95696b 209 *dest++ = LongMonthNames[dt.date.month - 1][i++];
dennyem 0:f09cf90def53 210 }
dennyem 0:f09cf90def53 211 }
dennyem 0:f09cf90def53 212 }
dennyem 0:f09cf90def53 213 break;
dennyem 0:f09cf90def53 214 case 'y':
dennyem 0:f09cf90def53 215 if(*(f+1) == 'y') {
dennyem 0:f09cf90def53 216 f++; //We have at least a 'yy'
dennyem 0:f09cf90def53 217 if(*(f+1) == 'y' && *(f+2) == 'y') { //'yyyy' - 4 digit year
dennyem 1:a8b9fb95696b 218 dest += Bcd2Char(dest, dt.date.century, true);
dennyem 0:f09cf90def53 219 f += 2;
dennyem 0:f09cf90def53 220 }
dennyem 1:a8b9fb95696b 221 dest += Bcd2Char(dest, dt.date.year, true);
dennyem 0:f09cf90def53 222 }
dennyem 0:f09cf90def53 223 break;
dennyem 0:f09cf90def53 224 case 'h':
dennyem 0:f09cf90def53 225 if(*(f+1) != 'h') { //'h' - Hour with no leading zero
dennyem 1:a8b9fb95696b 226 dest += Bcd2Char(dest, dt.time.hours, false);
dennyem 0:f09cf90def53 227 } else {
dennyem 0:f09cf90def53 228 f++;
dennyem 1:a8b9fb95696b 229 dest += Bcd2Char(dest, dt.time.hours, true);
dennyem 0:f09cf90def53 230 }
dennyem 0:f09cf90def53 231 break;
dennyem 0:f09cf90def53 232 case 'n':
dennyem 0:f09cf90def53 233 if(*(f+1) != 'n') { //'m' - Minutes with no leading zero
dennyem 1:a8b9fb95696b 234 dest += Bcd2Char(dest, dt.time.minutes, false);
dennyem 0:f09cf90def53 235 } else {
dennyem 0:f09cf90def53 236 f++;
dennyem 1:a8b9fb95696b 237 dest += Bcd2Char(dest, dt.time.minutes, true);
dennyem 0:f09cf90def53 238 }
dennyem 0:f09cf90def53 239 break;
dennyem 0:f09cf90def53 240 case 's':
dennyem 0:f09cf90def53 241 if(*(f+1) != 's') { //'s' - Seconds with no leading zero
dennyem 1:a8b9fb95696b 242 dest += Bcd2Char(dest, dt.time.seconds, false);
dennyem 0:f09cf90def53 243 } else {
dennyem 0:f09cf90def53 244 f++;
dennyem 1:a8b9fb95696b 245 dest += Bcd2Char(dest, dt.time.seconds, true);
dennyem 0:f09cf90def53 246 }
dennyem 0:f09cf90def53 247 break;
dennyem 0:f09cf90def53 248 case 'z':
dennyem 0:f09cf90def53 249 if(*(f+1) != 'z') { //'z' - Hundredths with no leading zero
dennyem 1:a8b9fb95696b 250 dest += Bcd2Char(dest, dt.time.hundreds, false);
dennyem 0:f09cf90def53 251 } else {
dennyem 0:f09cf90def53 252 f++;
dennyem 1:a8b9fb95696b 253 dest += Bcd2Char(dest, dt.time.hundreds, true);
dennyem 0:f09cf90def53 254 }
dennyem 0:f09cf90def53 255 break;
dennyem 0:f09cf90def53 256 case '/':
dennyem 0:f09cf90def53 257 *dest++ = DateSeparator;
dennyem 0:f09cf90def53 258 break;
dennyem 0:f09cf90def53 259 case ':':
dennyem 0:f09cf90def53 260 *dest++ = TimeSeparator;
dennyem 0:f09cf90def53 261 break;
dennyem 0:f09cf90def53 262 case 39 :
dennyem 0:f09cf90def53 263 while(*++f != 0 && *f != 39) *dest++ = *f;
dennyem 0:f09cf90def53 264 break; //Ignore the first '
dennyem 0:f09cf90def53 265 default:
dennyem 0:f09cf90def53 266 *dest++ = *f;
dennyem 0:f09cf90def53 267 break; //Anything we don't recognise, return it
dennyem 0:f09cf90def53 268 }
dennyem 0:f09cf90def53 269 f++;
dennyem 0:f09cf90def53 270 }
dennyem 0:f09cf90def53 271 }
dennyem 0:f09cf90def53 272 *dest = 0; //Null terminate
dennyem 0:f09cf90def53 273 };
dennyem 0:f09cf90def53 274
dennyem 0:f09cf90def53 275 bool PCF8583rtc::WriteNVram(char address, char *value, char num)
dennyem 0:f09cf90def53 276 {
dennyem 0:f09cf90def53 277 if((address < USER_REG) || (num == 0)) // dont allow overwriting first 2 user bytes
dennyem 0:f09cf90def53 278 return false;
dennyem 0:f09cf90def53 279
dennyem 1:a8b9fb95696b 280 _i2c->write(_I2cAddress, &address, 1); // set the rom address
dennyem 1:a8b9fb95696b 281 return _i2c->write(_I2cAddress, value, num); // write the data
dennyem 0:f09cf90def53 282 };
dennyem 0:f09cf90def53 283
dennyem 0:f09cf90def53 284 bool PCF8583rtc::ReadNVram(char address, char * dest, char num)
dennyem 0:f09cf90def53 285 {
dennyem 1:a8b9fb95696b 286 if((address < USER_REG) || (num == 0)) // dont allow overwriting first 2 user bytes
dennyem 0:f09cf90def53 287 return false;
dennyem 0:f09cf90def53 288
dennyem 1:a8b9fb95696b 289 _i2c->write(_I2cAddress, &address, 1); // set the rom address
dennyem 1:a8b9fb95696b 290 _i2c->read(_I2cAddress | 1, dest, num); // read the data
dennyem 0:f09cf90def53 291
dennyem 0:f09cf90def53 292 return true;
dennyem 0:f09cf90def53 293 };
dennyem 0:f09cf90def53 294
dennyem 0:f09cf90def53 295 /*****************************************************************************/
dennyem 0:f09cf90def53 296 /************************** Private Functions ********************************/
dennyem 0:f09cf90def53 297 /*****************************************************************************/
dennyem 0:f09cf90def53 298
dennyem 0:f09cf90def53 299 char PCF8583rtc::Bcd2Char(char *d, char val, char WantLeadZero)
dennyem 0:f09cf90def53 300 {
dennyem 0:f09cf90def53 301 char n = 0;
dennyem 0:f09cf90def53 302
dennyem 1:a8b9fb95696b 303 if(WantLeadZero == true || (val / 10) != 0) {
dennyem 0:f09cf90def53 304 *d++ = (val / 10) + 48;
dennyem 0:f09cf90def53 305 n++;
dennyem 0:f09cf90def53 306 }
dennyem 0:f09cf90def53 307 *d = (val % 10) + 48;
dennyem 0:f09cf90def53 308 return(n + 1);
dennyem 0:f09cf90def53 309 }
dennyem 0:f09cf90def53 310
dennyem 0:f09cf90def53 311 //----------------------------------------------
dennyem 1:a8b9fb95696b 312 // This function converts an 8 bit binary value to a 1 byte BCD value.
dennyem 0:f09cf90def53 313 // The input range must be from 0 to 99.
dennyem 1:a8b9fb95696b 314 char PCF8583rtc::bin2bcd(char value)
dennyem 0:f09cf90def53 315 {
dennyem 0:f09cf90def53 316 int tmp = 0;
dennyem 0:f09cf90def53 317
dennyem 0:f09cf90def53 318 while(1) {
dennyem 0:f09cf90def53 319 // Get the tens digit by doing multiple subtraction
dennyem 0:f09cf90def53 320 // of 10 from the binary value.
dennyem 0:f09cf90def53 321 if(value >= 10) {
dennyem 0:f09cf90def53 322 value -= 10;
dennyem 0:f09cf90def53 323 tmp += 0x10;
dennyem 0:f09cf90def53 324 } else { // Get the ones digit by adding the remainder.
dennyem 0:f09cf90def53 325 tmp += value;
dennyem 0:f09cf90def53 326 break;
dennyem 0:f09cf90def53 327 }
dennyem 0:f09cf90def53 328 }
dennyem 0:f09cf90def53 329 return tmp;
dennyem 0:f09cf90def53 330 }
dennyem 0:f09cf90def53 331
dennyem 0:f09cf90def53 332 void PCF8583rtc::writeByte(char address, char d)
dennyem 0:f09cf90def53 333 {
dennyem 1:a8b9fb95696b 334 char buf[2];
dennyem 1:a8b9fb95696b 335
dennyem 1:a8b9fb95696b 336 buf[0] = address;
dennyem 1:a8b9fb95696b 337 buf[1] = d;
dennyem 1:a8b9fb95696b 338 _i2c->write(_I2cAddress, buf, 2); // Address PCF8583, see PCF8583 datasheet
dennyem 0:f09cf90def53 339 }
dennyem 0:f09cf90def53 340
dennyem 0:f09cf90def53 341 void PCF8583rtc::configureControlReg(char control)
dennyem 0:f09cf90def53 342 {
dennyem 1:a8b9fb95696b 343 writeByte(0, control);
dennyem 0:f09cf90def53 344 }
dennyem 0:f09cf90def53 345
dennyem 0:f09cf90def53 346 void PCF8583rtc::configureAlarmReg(char alarm)
dennyem 0:f09cf90def53 347 {
dennyem 1:a8b9fb95696b 348 writeByte(0x08, alarm);
dennyem 0:f09cf90def53 349 }
dennyem 0:f09cf90def53 350
dennyem 0:f09cf90def53 351 char PCF8583rtc::readByte(char address)
dennyem 0:f09cf90def53 352 {
dennyem 1:a8b9fb95696b 353 char buf[2];
dennyem 1:a8b9fb95696b 354
dennyem 1:a8b9fb95696b 355 buf[0] = address;
dennyem 1:a8b9fb95696b 356 _i2c->write(_I2cAddress, buf, 1);
dennyem 1:a8b9fb95696b 357 _i2c->read(_I2cAddress | 1, buf, 1);
dennyem 1:a8b9fb95696b 358
dennyem 1:a8b9fb95696b 359 return buf[0];
dennyem 0:f09cf90def53 360 }
dennyem 0:f09cf90def53 361
dennyem 0:f09cf90def53 362 void PCF8583rtc::pauseCounting()
dennyem 0:f09cf90def53 363 {
dennyem 0:f09cf90def53 364 char tmp;
dennyem 0:f09cf90def53 365 tmp = readByte(0x00);
dennyem 0:f09cf90def53 366 tmp = tmp | 0x80;
dennyem 0:f09cf90def53 367 writeByte(0x00, tmp);
dennyem 0:f09cf90def53 368 }
dennyem 0:f09cf90def53 369
dennyem 0:f09cf90def53 370 void PCF8583rtc::enableCounting()
dennyem 0:f09cf90def53 371 {
dennyem 0:f09cf90def53 372 char tmp;
dennyem 0:f09cf90def53 373 tmp = readByte(0x00);
dennyem 0:f09cf90def53 374 tmp = tmp ^ 0x80;
dennyem 0:f09cf90def53 375 writeByte(0x00, tmp);
dennyem 0:f09cf90def53 376 }