Dennis Smith / Mbed 2 deprecated NixieClock800Max

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Dependencies:   PCF8583_rtc mbed

PCF8583_rtc.cpp@0:f09cf90def53, 2014-02-09 (annotated)

Committer:
dennyem
Date:
Sun Feb 09 00:25:21 2014 +0000
Revision:
0:f09cf90def53
Child:
1:a8b9fb95696b
First C++ revision for the LPC812

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 * write function is still to be tested
dennyem 0:f09cf90def53 19 * WriteNVram function is still to be tested
dennyem 0:f09cf90def53 20 * ReadNVram function is still to be tested
dennyem 0:f09cf90def53 21 * FormatDateTime needs am/pm, 12/24 hour parsing
dennyem 0:f09cf90def53 22 * Alarm functions not yet implemented
dennyem 0:f09cf90def53 23 */
dennyem 0:f09cf90def53 24
dennyem 0:f09cf90def53 25 #include <mbed.h>
dennyem 0:f09cf90def53 26 #include <PCF8583_rtc.h>
dennyem 0:f09cf90def53 27
dennyem 0:f09cf90def53 28 //-----------------------------------------------------------------------------
dennyem 0:f09cf90def53 29 // constructor -- accepts an I2c object to use for connection with the rtc
dennyem 0:f09cf90def53 30 PCF8583rtc::PCF8583rtc(I2C *i2c)
dennyem 0:f09cf90def53 31 {
dennyem 0:f09cf90def53 32 _i2c = i2c;
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 0:f09cf90def53 58 ShortMonthNames[0] = "Jan";
dennyem 0:f09cf90def53 59 ShortMonthNames[1] = "Feb";
dennyem 0:f09cf90def53 60 ShortMonthNames[2] = "Mar";
dennyem 0:f09cf90def53 61 ShortMonthNames[3] = "Apr";
dennyem 0:f09cf90def53 62 ShortMonthNames[4] = "May";
dennyem 0:f09cf90def53 63 ShortMonthNames[5] = "Jun";
dennyem 0:f09cf90def53 64 ShortMonthNames[6] = "Jul";
dennyem 0:f09cf90def53 65 ShortMonthNames[7] = "Aug";
dennyem 0:f09cf90def53 66 ShortMonthNames[8] = "Sep";
dennyem 0:f09cf90def53 67 ShortMonthNames[9] = "Oct";
dennyem 0:f09cf90def53 68 ShortMonthNames[10] = "Nov";
dennyem 0:f09cf90def53 69 ShortMonthNames[11] = "Dec";
dennyem 0:f09cf90def53 70
dennyem 0:f09cf90def53 71 LongMonthNames[0] = "January";
dennyem 0:f09cf90def53 72 LongMonthNames[1] = "February";
dennyem 0:f09cf90def53 73 LongMonthNames[2] = "March";
dennyem 0:f09cf90def53 74 LongMonthNames[3] = "April";
dennyem 0:f09cf90def53 75 LongMonthNames[4] = "May";
dennyem 0:f09cf90def53 76 LongMonthNames[5] = "June";
dennyem 0:f09cf90def53 77 LongMonthNames[6] = "July";
dennyem 0:f09cf90def53 78 LongMonthNames[7] = "August";
dennyem 0:f09cf90def53 79 LongMonthNames[8] = "September";
dennyem 0:f09cf90def53 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 0:f09cf90def53 85 void PCF8583rtc::write(const char address)
dennyem 0:f09cf90def53 86 {
dennyem 0:f09cf90def53 87 pauseCounting(); //Must stop counting before initialising Date/time
dennyem 0:f09cf90def53 88
dennyem 0:f09cf90def53 89 _i2c->start(); // Issue start signal
dennyem 0:f09cf90def53 90 _i2c->write(Write_addr); // Address PCF8583, see PCF8583 datasheet
dennyem 0:f09cf90def53 91 _i2c->write(address); // Address is 1 for Time or 10 for Alarm
dennyem 0:f09cf90def53 92 _i2c->write(dt.time.hundreds); // Hundredths of a second
dennyem 0:f09cf90def53 93 _i2c->write(dt.time.seconds); // Seconds
dennyem 0:f09cf90def53 94 _i2c->write(dt.time.minutes); // Minutes
dennyem 0:f09cf90def53 95 _i2c->write(dt.time.hours); // Hours
dennyem 0:f09cf90def53 96 _i2c->write(dt.date.day & 0x3F); // Always set the 3 year bits to 0
dennyem 0:f09cf90def53 97
dennyem 0:f09cf90def53 98 if(address == TIME)
dennyem 0:f09cf90def53 99 _i2c->write(((dt.date.weekday & 7) << 5 )| dt.date.month); // Weekday/month
dennyem 0:f09cf90def53 100 else
dennyem 0:f09cf90def53 101 _i2c->write(dt.date.month & 0x1f); // No Weekday for alarm
dennyem 0:f09cf90def53 102
dennyem 0:f09cf90def53 103 _i2c->stop(); // Issue stop signal
dennyem 0:f09cf90def53 104
dennyem 0:f09cf90def53 105 if(address == TIME) {
dennyem 0:f09cf90def53 106 writeByte(CENTURY_REG, dt.date.century); // Store the full 4 digit year in NV Ram
dennyem 0:f09cf90def53 107 writeByte(YEAR_REG, dt.date.year);
dennyem 0:f09cf90def53 108 };
dennyem 0:f09cf90def53 109
dennyem 0:f09cf90def53 110 enableCounting();
dennyem 0:f09cf90def53 111 };
dennyem 0:f09cf90def53 112
dennyem 0:f09cf90def53 113 //--------------------- Reads time and date information from RTC (PCF8583)
dennyem 0:f09cf90def53 114 void PCF8583rtc::read(const char address)
dennyem 0:f09cf90def53 115 {
dennyem 0:f09cf90def53 116 char tmp[8];
dennyem 0:f09cf90def53 117 char year_bits = 0; // To test for year change
dennyem 0:f09cf90def53 118
dennyem 0:f09cf90def53 119 tmp[0] = address;
dennyem 0:f09cf90def53 120 _i2c->write(PCF8583_addr, tmp, 1); // Address PCF8583, see PCF8583 datasheet
dennyem 0:f09cf90def53 121 _i2c->read(PCF8583_addr, tmp, 6); // Address PCF8583 for reading R/W=1
dennyem 0:f09cf90def53 122
dennyem 0:f09cf90def53 123 dt.time.hundreds = ((tmp[0] & 0xF0) >> 4) * 10 + (tmp[0] & 0x0F); // Transform hundredths of seconds
dennyem 0:f09cf90def53 124 dt.time.seconds = ((tmp[1] & 0xF0) >> 4) * 10 + (tmp[1] & 0x0F); // Transform seconds
dennyem 0:f09cf90def53 125 dt.time.minutes = ((tmp[2] & 0xF0) >> 4) * 10 + (tmp[2] & 0x0F); // Transform minutes
dennyem 0:f09cf90def53 126 dt.time.hours = ((tmp[3] & 0x30) >> 4) * 10 + (tmp[3] & 0x0F); // Transform hours
dennyem 0:f09cf90def53 127 dt.time.fmt_hours = (tmp[3] & 0x80); // 12/24 hour format
dennyem 0:f09cf90def53 128 dt.time.am_pm_flag = (tmp[3] & 0x40); // Am/Pm flag
dennyem 0:f09cf90def53 129 dt.date.day = ((tmp[4] & 0x30) >> 4) * 10 + (tmp[4] & 0x0F); // Transform day
dennyem 0:f09cf90def53 130
dennyem 0:f09cf90def53 131 if(address == TIME)
dennyem 0:f09cf90def53 132 year_bits = (tmp[4] & 0xC0) >> 6;
dennyem 0:f09cf90def53 133 else
dennyem 0:f09cf90def53 134 dt.date.year = 0; // No year for alarm
dennyem 0:f09cf90def53 135
dennyem 0:f09cf90def53 136 dt.date.month = ((tmp[5] & 0x10) >> 4) * 10 + (tmp[5] & 0x0F); // Transform month
dennyem 0:f09cf90def53 137
dennyem 0:f09cf90def53 138 if(address == TIME)
dennyem 0:f09cf90def53 139 dt.date.weekday = tmp[5] >> 5;
dennyem 0:f09cf90def53 140 else
dennyem 0:f09cf90def53 141 dt.date.weekday = 0; // No weekday for alarm
dennyem 0:f09cf90def53 142
dennyem 0:f09cf90def53 143 if(address == TIME) {
dennyem 0:f09cf90def53 144 tmp[0] = readByte(CENTURY_REG);
dennyem 0:f09cf90def53 145 dt.date.century = ((tmp[0] & 0xF0) >> 4) * 10 + (tmp[0] & 0x0F);
dennyem 0:f09cf90def53 146 tmp[0] = readByte(YEAR_REG);
dennyem 0:f09cf90def53 147 dt.date.year = ((tmp[0] & 0xF0) >> 4) * 10 + (tmp[0] & 0x0F);
dennyem 0:f09cf90def53 148
dennyem 0:f09cf90def53 149 if(year_bits > 0) { // Midnight on new years eve?
dennyem 0:f09cf90def53 150 dt.date.year += 1; // Increment the year
dennyem 0:f09cf90def53 151 writeByte(YEAR_REG, dt.date.year); // Save the new year value to NV Ram
dennyem 0:f09cf90def53 152 writeByte(5, dt.date.day & 0x3F); // Clear the year bits but preserve the date
dennyem 0:f09cf90def53 153 }
dennyem 0:f09cf90def53 154 }
dennyem 0:f09cf90def53 155 };
dennyem 0:f09cf90def53 156
dennyem 0:f09cf90def53 157 struct DateTime_t PCF8583rtc::GetDateTime(void)
dennyem 0:f09cf90def53 158 {
dennyem 0:f09cf90def53 159 return dt;
dennyem 0:f09cf90def53 160 }
dennyem 0:f09cf90def53 161
dennyem 0:f09cf90def53 162 struct DateTime_t PCF8583rtc::GetDateTimeBCD(void)
dennyem 0:f09cf90def53 163 {
dennyem 0:f09cf90def53 164 struct DateTime_t dtb;
dennyem 0:f09cf90def53 165
dennyem 0:f09cf90def53 166 dtb = dt;
dennyem 0:f09cf90def53 167 dtb.time.hours = bin2bcd(dt.time.hours);
dennyem 0:f09cf90def53 168 dtb.time.minutes = bin2bcd(dt.time.minutes);
dennyem 0:f09cf90def53 169 dtb.time.seconds = bin2bcd(dt.time.seconds);
dennyem 0:f09cf90def53 170 dtb.time.hundreds = bin2bcd(dt.time.hundreds);
dennyem 0:f09cf90def53 171
dennyem 0:f09cf90def53 172 dtb.date.day = bin2bcd(dt.date.day);
dennyem 0:f09cf90def53 173 dtb.date.month = bin2bcd(dt.date.month);
dennyem 0:f09cf90def53 174 dtb.date.year = bin2bcd(dt.date.year);
dennyem 0:f09cf90def53 175 dtb.date.century = bin2bcd(dt.date.century);
dennyem 0:f09cf90def53 176
dennyem 0:f09cf90def53 177 return dtb;
dennyem 0:f09cf90def53 178 }
dennyem 0:f09cf90def53 179
dennyem 0:f09cf90def53 180 void PCF8583rtc::FormatDateTime(char *dest, char *f)
dennyem 0:f09cf90def53 181 {
dennyem 0:f09cf90def53 182 if(f != 0 && *f != 0) { //If the format param is empty then do a default 'c'
dennyem 0:f09cf90def53 183 while(*f != 0) { //expect null terminated string (we hope)
dennyem 0:f09cf90def53 184 switch(*f) {
dennyem 0:f09cf90def53 185 case 'c':
dennyem 0:f09cf90def53 186 break;
dennyem 0:f09cf90def53 187 case 'd':
dennyem 0:f09cf90def53 188 if(*(f+1) != 'd') { //'d' - Day with no leading zero
dennyem 0:f09cf90def53 189 dest += Bcd2Char(dest, dt.date.day, FALSE);
dennyem 0:f09cf90def53 190 } else {
dennyem 0:f09cf90def53 191 f++;
dennyem 0:f09cf90def53 192 if(*(f+1) != 'd') //'dd' - Day with leading zero
dennyem 0:f09cf90def53 193 dest += Bcd2Char(dest, dt.date.day, TRUE);
dennyem 0:f09cf90def53 194 else {
dennyem 0:f09cf90def53 195 f++;
dennyem 0:f09cf90def53 196 if(*(f+1) != 'd') { //'ddd' - Short day name
dennyem 0:f09cf90def53 197 // i = 0;
dennyem 0:f09cf90def53 198 // while(ShortDayNames[dt.date.weekday][i] != 0)
dennyem 0:f09cf90def53 199 // *dest++ = ShortDayNames[dt.date.weekday][i++];
dennyem 0:f09cf90def53 200 } else {
dennyem 0:f09cf90def53 201 f++;
dennyem 0:f09cf90def53 202 // i = 0;
dennyem 0:f09cf90def53 203 // while(LongDayNames[dt.date.weekday][i] != 0)
dennyem 0:f09cf90def53 204 // *dest++ = LongDayNames[dt.date.weekday][i++];
dennyem 0:f09cf90def53 205 }
dennyem 0:f09cf90def53 206 }
dennyem 0:f09cf90def53 207 }
dennyem 0:f09cf90def53 208 break;
dennyem 0:f09cf90def53 209 case 'm':
dennyem 0:f09cf90def53 210 if(*(f+1) != 'm') { //'m' - Month with no leading zero
dennyem 0:f09cf90def53 211 dest += Bcd2Char(dest, dt.date.month, FALSE);
dennyem 0:f09cf90def53 212 } else {
dennyem 0:f09cf90def53 213 f++;
dennyem 0:f09cf90def53 214 if(*(f+1) != 'm') //'mm' - Month with leading zero
dennyem 0:f09cf90def53 215 dest += Bcd2Char(dest, dt.date.month, TRUE);
dennyem 0:f09cf90def53 216 else {
dennyem 0:f09cf90def53 217 f++;
dennyem 0:f09cf90def53 218 if(*(f+1) != 'm') { //'mmm' - Short month name
dennyem 0:f09cf90def53 219 // i = 0;
dennyem 0:f09cf90def53 220 // while(ShortMonthNames[dt.date.month - 1][i] != 0)
dennyem 0:f09cf90def53 221 // *dest++ = ShortMonthNames[dt.date.month - 1][i++];
dennyem 0:f09cf90def53 222 } else {
dennyem 0:f09cf90def53 223 f++;
dennyem 0:f09cf90def53 224 // i = 0;
dennyem 0:f09cf90def53 225 // while(LongMonthNames[dt.date.month - 1][i] != 0)
dennyem 0:f09cf90def53 226 // *dest++ = LongMonthNames[dt.date.month - 1][i++];
dennyem 0:f09cf90def53 227 }
dennyem 0:f09cf90def53 228 }
dennyem 0:f09cf90def53 229 }
dennyem 0:f09cf90def53 230 break;
dennyem 0:f09cf90def53 231 case 'y':
dennyem 0:f09cf90def53 232 if(*(f+1) == 'y') {
dennyem 0:f09cf90def53 233 f++; //We have at least a 'yy'
dennyem 0:f09cf90def53 234 if(*(f+1) == 'y' && *(f+2) == 'y') { //'yyyy' - 4 digit year
dennyem 0:f09cf90def53 235 dest += Bcd2Char(dest, dt.date.century, TRUE);
dennyem 0:f09cf90def53 236 f += 2;
dennyem 0:f09cf90def53 237 }
dennyem 0:f09cf90def53 238 dest += Bcd2Char(dest, dt.date.year, TRUE);
dennyem 0:f09cf90def53 239 }
dennyem 0:f09cf90def53 240 break;
dennyem 0:f09cf90def53 241 case 'h':
dennyem 0:f09cf90def53 242 if(*(f+1) != 'h') { //'h' - Hour with no leading zero
dennyem 0:f09cf90def53 243 dest += Bcd2Char(dest, dt.time.hours, FALSE);
dennyem 0:f09cf90def53 244 } else {
dennyem 0:f09cf90def53 245 f++;
dennyem 0:f09cf90def53 246 dest += Bcd2Char(dest, dt.time.hours, TRUE);
dennyem 0:f09cf90def53 247 }
dennyem 0:f09cf90def53 248 break;
dennyem 0:f09cf90def53 249 case 'n':
dennyem 0:f09cf90def53 250 if(*(f+1) != 'n') { //'m' - Minutes with no leading zero
dennyem 0:f09cf90def53 251 dest += Bcd2Char(dest, dt.time.minutes, FALSE);
dennyem 0:f09cf90def53 252 } else {
dennyem 0:f09cf90def53 253 f++;
dennyem 0:f09cf90def53 254 dest += Bcd2Char(dest, dt.time.minutes, TRUE);
dennyem 0:f09cf90def53 255 }
dennyem 0:f09cf90def53 256 break;
dennyem 0:f09cf90def53 257 case 's':
dennyem 0:f09cf90def53 258 if(*(f+1) != 's') { //'s' - Seconds with no leading zero
dennyem 0:f09cf90def53 259 dest += Bcd2Char(dest, dt.time.seconds, FALSE);
dennyem 0:f09cf90def53 260 } else {
dennyem 0:f09cf90def53 261 f++;
dennyem 0:f09cf90def53 262 dest += Bcd2Char(dest, dt.time.seconds, TRUE);
dennyem 0:f09cf90def53 263 }
dennyem 0:f09cf90def53 264 break;
dennyem 0:f09cf90def53 265 case 'z':
dennyem 0:f09cf90def53 266 if(*(f+1) != 'z') { //'z' - Hundredths with no leading zero
dennyem 0:f09cf90def53 267 dest += Bcd2Char(dest, dt.time.hundreds, FALSE);
dennyem 0:f09cf90def53 268 } else {
dennyem 0:f09cf90def53 269 f++;
dennyem 0:f09cf90def53 270 dest += Bcd2Char(dest, dt.time.hundreds, TRUE);
dennyem 0:f09cf90def53 271 }
dennyem 0:f09cf90def53 272 break;
dennyem 0:f09cf90def53 273 case '/':
dennyem 0:f09cf90def53 274 *dest++ = DateSeparator;
dennyem 0:f09cf90def53 275 break;
dennyem 0:f09cf90def53 276 case ':':
dennyem 0:f09cf90def53 277 *dest++ = TimeSeparator;
dennyem 0:f09cf90def53 278 break;
dennyem 0:f09cf90def53 279 case 39 :
dennyem 0:f09cf90def53 280 while(*++f != 0 && *f != 39) *dest++ = *f;
dennyem 0:f09cf90def53 281 break; //Ignore the first '
dennyem 0:f09cf90def53 282 default:
dennyem 0:f09cf90def53 283 *dest++ = *f;
dennyem 0:f09cf90def53 284 break; //Anything we don't recognise, return it
dennyem 0:f09cf90def53 285 }
dennyem 0:f09cf90def53 286 f++;
dennyem 0:f09cf90def53 287 }
dennyem 0:f09cf90def53 288 }
dennyem 0:f09cf90def53 289 *dest = 0; //Null terminate
dennyem 0:f09cf90def53 290 };
dennyem 0:f09cf90def53 291
dennyem 0:f09cf90def53 292 bool PCF8583rtc::WriteNVram(char address, char *value, char num)
dennyem 0:f09cf90def53 293 {
dennyem 0:f09cf90def53 294 if((address < USER_REG) || (num == 0)) // dont allow overwriting first 2 user bytes
dennyem 0:f09cf90def53 295 return false;
dennyem 0:f09cf90def53 296
dennyem 0:f09cf90def53 297 _i2c->write(PCF8583_addr, &address, 1); // set the rom address
dennyem 0:f09cf90def53 298 return _i2c->write(PCF8583_addr, value, num); // write the data
dennyem 0:f09cf90def53 299 };
dennyem 0:f09cf90def53 300
dennyem 0:f09cf90def53 301 bool PCF8583rtc::ReadNVram(char address, char * dest, char num)
dennyem 0:f09cf90def53 302 {
dennyem 0:f09cf90def53 303 if((address < USER_REG) || (num == 0)) // dont allow overwriting first 2 user bytes
dennyem 0:f09cf90def53 304 return false;
dennyem 0:f09cf90def53 305
dennyem 0:f09cf90def53 306 _i2c->write(PCF8583_addr, &address, 1); // set the rom address
dennyem 0:f09cf90def53 307 _i2c->read(PCF8583_addr, dest, num); // read the data
dennyem 0:f09cf90def53 308
dennyem 0:f09cf90def53 309 return true;
dennyem 0:f09cf90def53 310 };
dennyem 0:f09cf90def53 311
dennyem 0:f09cf90def53 312 /*****************************************************************************/
dennyem 0:f09cf90def53 313 /************************** Private Functions ********************************/
dennyem 0:f09cf90def53 314 /*****************************************************************************/
dennyem 0:f09cf90def53 315
dennyem 0:f09cf90def53 316 char PCF8583rtc::Bcd2Char(char *d, char val, char WantLeadZero)
dennyem 0:f09cf90def53 317 {
dennyem 0:f09cf90def53 318 char n = 0;
dennyem 0:f09cf90def53 319
dennyem 0:f09cf90def53 320 if(WantLeadZero == TRUE || (val / 10) != 0) {
dennyem 0:f09cf90def53 321 *d++ = (val / 10) + 48;
dennyem 0:f09cf90def53 322 n++;
dennyem 0:f09cf90def53 323 }
dennyem 0:f09cf90def53 324 *d = (val % 10) + 48;
dennyem 0:f09cf90def53 325 return(n + 1);
dennyem 0:f09cf90def53 326 }
dennyem 0:f09cf90def53 327
dennyem 0:f09cf90def53 328 //----------------------------------------------
dennyem 0:f09cf90def53 329 // This function converts an 8 bit binary value to a 2 byte BCD value.
dennyem 0:f09cf90def53 330 // The input range must be from 0 to 99.
dennyem 0:f09cf90def53 331 int PCF8583rtc::bin2bcd(char value)
dennyem 0:f09cf90def53 332 {
dennyem 0:f09cf90def53 333 int tmp = 0;
dennyem 0:f09cf90def53 334
dennyem 0:f09cf90def53 335 while(1) {
dennyem 0:f09cf90def53 336 // Get the tens digit by doing multiple subtraction
dennyem 0:f09cf90def53 337 // of 10 from the binary value.
dennyem 0:f09cf90def53 338 if(value >= 10) {
dennyem 0:f09cf90def53 339 value -= 10;
dennyem 0:f09cf90def53 340 tmp += 0x10;
dennyem 0:f09cf90def53 341 } else { // Get the ones digit by adding the remainder.
dennyem 0:f09cf90def53 342 tmp += value;
dennyem 0:f09cf90def53 343 break;
dennyem 0:f09cf90def53 344 }
dennyem 0:f09cf90def53 345 }
dennyem 0:f09cf90def53 346 return tmp;
dennyem 0:f09cf90def53 347 }
dennyem 0:f09cf90def53 348
dennyem 0:f09cf90def53 349 void PCF8583rtc::writeByte(char address, char d)
dennyem 0:f09cf90def53 350 {
dennyem 0:f09cf90def53 351 _i2c->start();
dennyem 0:f09cf90def53 352 _i2c->write(Write_addr);
dennyem 0:f09cf90def53 353 _i2c->write(address);
dennyem 0:f09cf90def53 354 _i2c->write(d);
dennyem 0:f09cf90def53 355 _i2c->stop();
dennyem 0:f09cf90def53 356 }
dennyem 0:f09cf90def53 357
dennyem 0:f09cf90def53 358 void PCF8583rtc::configureControlReg(char control)
dennyem 0:f09cf90def53 359 {
dennyem 0:f09cf90def53 360 _i2c->start();
dennyem 0:f09cf90def53 361 _i2c->write(Write_addr);
dennyem 0:f09cf90def53 362 _i2c->write(0x00);
dennyem 0:f09cf90def53 363 _i2c->write(control);
dennyem 0:f09cf90def53 364 _i2c->stop();
dennyem 0:f09cf90def53 365 }
dennyem 0:f09cf90def53 366
dennyem 0:f09cf90def53 367 void PCF8583rtc::configureAlarmReg(char alarm)
dennyem 0:f09cf90def53 368 {
dennyem 0:f09cf90def53 369 _i2c->start();
dennyem 0:f09cf90def53 370 _i2c->write(Write_addr);
dennyem 0:f09cf90def53 371 _i2c->write(0x08);
dennyem 0:f09cf90def53 372 _i2c->write(alarm);
dennyem 0:f09cf90def53 373 _i2c->stop();
dennyem 0:f09cf90def53 374 }
dennyem 0:f09cf90def53 375
dennyem 0:f09cf90def53 376 char PCF8583rtc::readByte(char address)
dennyem 0:f09cf90def53 377 {
dennyem 0:f09cf90def53 378 char var;
dennyem 0:f09cf90def53 379 _i2c->start();
dennyem 0:f09cf90def53 380 _i2c->write(Write_addr);
dennyem 0:f09cf90def53 381 _i2c->write(address);
dennyem 0:f09cf90def53 382 _i2c->start();
dennyem 0:f09cf90def53 383 _i2c->write(Read_addr);
dennyem 0:f09cf90def53 384 var = _i2c->read(0) ;
dennyem 0:f09cf90def53 385 _i2c->stop();
dennyem 0:f09cf90def53 386 return var;
dennyem 0:f09cf90def53 387 }
dennyem 0:f09cf90def53 388
dennyem 0:f09cf90def53 389 void PCF8583rtc::pauseCounting()
dennyem 0:f09cf90def53 390 {
dennyem 0:f09cf90def53 391 char tmp;
dennyem 0:f09cf90def53 392 tmp = readByte(0x00);
dennyem 0:f09cf90def53 393 tmp = tmp | 0x80;
dennyem 0:f09cf90def53 394 writeByte(0x00, tmp);
dennyem 0:f09cf90def53 395 }
dennyem 0:f09cf90def53 396
dennyem 0:f09cf90def53 397 void PCF8583rtc::enableCounting()
dennyem 0:f09cf90def53 398 {
dennyem 0:f09cf90def53 399 char tmp;
dennyem 0:f09cf90def53 400 tmp = readByte(0x00);
dennyem 0:f09cf90def53 401 tmp = tmp ^ 0x80;
dennyem 0:f09cf90def53 402 writeByte(0x00, tmp);
dennyem 0:f09cf90def53 403 }