Jordi Farre / RTC-DS1339-dispay16x2

Display 16x2 i RTC DS1339

Dependencies:   USBDevice

Fork of RTC-DS1307 by Henry Leinen

Rtc_Ds1307.cpp@10:04e521aac9d8, 2015-02-19 (annotated)

Committer:
jordifarre
Date:
Thu Feb 19 11:47:16 2015 +0000
Revision:
10:04e521aac9d8
Parent:
9:5627b407e097 
Aquest programa esta tret del programa Rtc_Ds1307_Sample ; //i esta modificat per controlar un DS1339; //Es un exemple molt sencill de mostrar per LCD la hora i la data que; //manten la pila

Who changed what in which revision?

UserRevisionLine numberNew contents of line
leihen 5:30531f2121a2 1 #include "mbed.h"
leihen 0:3940f0ad2ca5 2 #include "Rtc_Ds1307.h"
leihen 7:dca20be3ef38 3
leihen 5:30531f2121a2 4 #ifndef DEBUG
leihen 9:5627b407e097 5 //#define DEBUG
leihen 5:30531f2121a2 6 #endif
leihen 3:e89d63f3342e 7 #include "debug.h"
leihen 0:3940f0ad2ca5 8
jordifarre 10:04e521aac9d8 9 //const char *Rtc_Ds1307::m_weekDays[] = { "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" };
jordifarre 10:04e521aac9d8 10 //const char *Rtc_Ds1307::m_weekDays[] = { "Disabte", "Diumenge", "Dilluns", "Dimarts", "Dimecres", "Dijous", "Divendres" };
jordifarre 10:04e521aac9d8 11 const char *Rtc_Ds1307::m_weekDays[] = { "Dg", "Dl", "Dt", "Dc", "Dj", "Dv", "Ds" };
leihen 0:3940f0ad2ca5 12
leihen 0:3940f0ad2ca5 13
leihen 0:3940f0ad2ca5 14 Rtc_Ds1307::Rtc_Ds1307(PinName sda, PinName scl)
leihen 0:3940f0ad2ca5 15 {
leihen 0:3940f0ad2ca5 16 // Create a new I2C object
leihen 0:3940f0ad2ca5 17 m_rtc = new I2C(sda, scl);
leihen 0:3940f0ad2ca5 18 if (m_rtc == NULL)
leihen 0:3940f0ad2ca5 19 error("Rtc_Ds1307");
leihen 1:64274190e842 20
leihen 1:64274190e842 21 // Set the frequency to standard 100kHz
leihen 1:64274190e842 22 m_rtc->frequency(100000);
leihen 0:3940f0ad2ca5 23 }
leihen 0:3940f0ad2ca5 24
leihen 0:3940f0ad2ca5 25 Rtc_Ds1307::~Rtc_Ds1307()
leihen 0:3940f0ad2ca5 26 {
leihen 0:3940f0ad2ca5 27 if (m_rtc != NULL)
leihen 0:3940f0ad2ca5 28 delete m_rtc;
leihen 0:3940f0ad2ca5 29 }
leihen 0:3940f0ad2ca5 30
leihen 5:30531f2121a2 31 bool Rtc_Ds1307::setTime(Time_rtc& time, bool start, bool thm)
leihen 0:3940f0ad2ca5 32 {
leihen 2:ee81f2c5a706 33 char buffer[7];
leihen 2:ee81f2c5a706 34 INFO("reading clock registers to write the new time : %d:%d:%d\n", time.hour, time.min, time.sec);
leihen 2:ee81f2c5a706 35 if (!read(0,buffer,7)) {
leihen 2:ee81f2c5a706 36 ERR("Failed to read from RTC\n");
leihen 2:ee81f2c5a706 37 return false;
leihen 2:ee81f2c5a706 38 }
leihen 2:ee81f2c5a706 39 // Now update only the time part (saving the existing flags)
leihen 2:ee81f2c5a706 40 if (start) { buffer[0] &= 0x7F; } else { buffer[0] |= 0x80; }
leihen 2:ee81f2c5a706 41 buffer[0] = (buffer[0]&0x80) | (decimalToBcd(time.sec)& 0x7f);
leihen 2:ee81f2c5a706 42 buffer[1] = decimalToBcd(time.min);
leihen 2:ee81f2c5a706 43 if (thm) {
leihen 2:ee81f2c5a706 44 // AM PM format
leihen 2:ee81f2c5a706 45 buffer[2] = (buffer[2]& 196) | (time.hour>12 ? (0x20 | ((decimalToBcd(time.hour-12)))) : decimalToBcd(time.hour));
leihen 2:ee81f2c5a706 46 }
leihen 2:ee81f2c5a706 47 else {
leihen 2:ee81f2c5a706 48 // 24 hours format
leihen 2:ee81f2c5a706 49 buffer[2] = (buffer[2]& 196) | (decimalToBcd(time.hour) & 0x3F);
leihen 2:ee81f2c5a706 50 }
leihen 2:ee81f2c5a706 51 buffer[3] = time.wday;
leihen 2:ee81f2c5a706 52 buffer[4] = decimalToBcd(time.date);
leihen 2:ee81f2c5a706 53 buffer[5] = decimalToBcd(time.mon);
leihen 2:ee81f2c5a706 54 buffer[6] = decimalToBcd(time.year-2000);
leihen 2:ee81f2c5a706 55 INFO("Writing new time and date data to RTC\n");
leihen 2:ee81f2c5a706 56 if (!write(0, buffer, 7) ) {
leihen 2:ee81f2c5a706 57 ERR("Failed to write the data to RTC!\n");
leihen 2:ee81f2c5a706 58 return false;
leihen 2:ee81f2c5a706 59 }
leihen 0:3940f0ad2ca5 60 return true;
leihen 0:3940f0ad2ca5 61 }
leihen 0:3940f0ad2ca5 62
leihen 5:30531f2121a2 63 bool Rtc_Ds1307::getTime(Time_rtc& time)
leihen 0:3940f0ad2ca5 64 {
leihen 1:64274190e842 65 char buffer[7];
leihen 1:64274190e842 66 bool thm = false;
leihen 1:64274190e842 67
leihen 1:64274190e842 68 INFO("Getting time from RTC\n");
leihen 2:ee81f2c5a706 69 if (!read(0, buffer, 7) ) {
leihen 1:64274190e842 70 // Failed to read
leihen 1:64274190e842 71 ERR("Failed to read from RTC\n");
leihen 1:64274190e842 72 return false;
leihen 1:64274190e842 73 }
leihen 1:64274190e842 74 thm = ((buffer[2] & 64) == 64);
leihen 1:64274190e842 75 time.sec = bcdToDecimal(buffer[0]&0x7F);
leihen 1:64274190e842 76 time.min = bcdToDecimal(buffer[1]);
leihen 1:64274190e842 77 if (thm) {
leihen 1:64274190e842 78 // in 12-hour-mode, we need to add 12 hours if PM bit is set
leihen 1:64274190e842 79 time.hour = Rtc_Ds1307::bcdToDecimal( buffer[2] & 31 );
leihen 1:64274190e842 80 if ((buffer[2] & 32) == 32)
leihen 1:64274190e842 81 time.hour += 12;
leihen 1:64274190e842 82 }
leihen 1:64274190e842 83 else {
leihen 1:64274190e842 84 time.hour = Rtc_Ds1307::bcdToDecimal( buffer[2] & 63 );
leihen 1:64274190e842 85 }
leihen 1:64274190e842 86 time.wday = buffer[3];
leihen 1:64274190e842 87 time.date = Rtc_Ds1307::bcdToDecimal( buffer[4]);
leihen 1:64274190e842 88 time.mon = Rtc_Ds1307::bcdToDecimal( buffer[5]);
leihen 2:ee81f2c5a706 89 time.year = Rtc_Ds1307::bcdToDecimal(buffer[6]) + 2000; // plus hundret is because RTC is giving the years since 2000, but std c struct tm needs years since 1900
leihen 2:ee81f2c5a706 90
leihen 2:ee81f2c5a706 91 return true;
leihen 2:ee81f2c5a706 92 }
leihen 2:ee81f2c5a706 93
leihen 2:ee81f2c5a706 94
leihen 2:ee81f2c5a706 95 bool Rtc_Ds1307::startClock()
leihen 2:ee81f2c5a706 96 {
leihen 2:ee81f2c5a706 97 char strtStop;
leihen 2:ee81f2c5a706 98
leihen 2:ee81f2c5a706 99 INFO ("Reading clock start/stop register value\n");
leihen 2:ee81f2c5a706 100 if (!read(0, &strtStop, 1)) {
leihen 2:ee81f2c5a706 101 ERR("Failed to read clock start stop register !\n");
leihen 2:ee81f2c5a706 102 return false;
leihen 2:ee81f2c5a706 103 }
leihen 2:ee81f2c5a706 104
leihen 2:ee81f2c5a706 105 strtStop &= 0x7F;
leihen 2:ee81f2c5a706 106
leihen 2:ee81f2c5a706 107 INFO("Writing back start/stop register value\n");
leihen 2:ee81f2c5a706 108 if (!write(0, &strtStop, 1)) {
leihen 2:ee81f2c5a706 109 ERR("Failed to write the start stop register !\n");
leihen 2:ee81f2c5a706 110 return false;
leihen 2:ee81f2c5a706 111 }
leihen 2:ee81f2c5a706 112
leihen 2:ee81f2c5a706 113 INFO("Start/stop register value successfully written\n");
leihen 2:ee81f2c5a706 114 return true;
leihen 2:ee81f2c5a706 115 }
leihen 2:ee81f2c5a706 116
leihen 2:ee81f2c5a706 117 bool Rtc_Ds1307::stopClock()
leihen 2:ee81f2c5a706 118 {
leihen 2:ee81f2c5a706 119 char strtStop;
leihen 2:ee81f2c5a706 120
leihen 2:ee81f2c5a706 121 INFO ("Reading clock start/stop register value\n");
leihen 2:ee81f2c5a706 122 if (!read(0, &strtStop, 1)) {
leihen 2:ee81f2c5a706 123 ERR("Failed to read clock start stop register !\n");
leihen 2:ee81f2c5a706 124 return false;
leihen 2:ee81f2c5a706 125 }
leihen 1:64274190e842 126
leihen 2:ee81f2c5a706 127 strtStop |= 0x80;
leihen 2:ee81f2c5a706 128
leihen 2:ee81f2c5a706 129 INFO("Writing back start/stop register value\n");
leihen 2:ee81f2c5a706 130 if (!write(0, &strtStop, 1)) {
leihen 2:ee81f2c5a706 131 ERR("Failed to write the start stop register !\n");
leihen 2:ee81f2c5a706 132 return false;
leihen 2:ee81f2c5a706 133 }
leihen 2:ee81f2c5a706 134
leihen 2:ee81f2c5a706 135 INFO("Start/stop register value successfully written\n");
leihen 2:ee81f2c5a706 136 return true;
leihen 0:3940f0ad2ca5 137 }
leihen 1:64274190e842 138
leihen 5:30531f2121a2 139 bool Rtc_Ds1307::setSquareWaveOutput(bool ena, SqwRateSelect_t rs)
leihen 2:ee81f2c5a706 140 {
leihen 2:ee81f2c5a706 141 char reg;
leihen 2:ee81f2c5a706 142 INFO("Reading register value first\n");
leihen 2:ee81f2c5a706 143
leihen 2:ee81f2c5a706 144 if (!read(7,&reg, 1)) {
leihen 2:ee81f2c5a706 145 ERR("Failed to read register value !\n");
leihen 2:ee81f2c5a706 146 return false;
leihen 2:ee81f2c5a706 147 }
leihen 2:ee81f2c5a706 148 INFO("[Reg:0x07] = %02x\n", reg);
leihen 2:ee81f2c5a706 149
leihen 2:ee81f2c5a706 150 // preserve the OUT control bit while writing the frequency and enable bits
leihen 2:ee81f2c5a706 151 reg = (reg & 0x80) | (ena ? 0x10 : 0) | ((char)rs & 0x03);
leihen 2:ee81f2c5a706 152
leihen 2:ee81f2c5a706 153 INFO("Writing back register value\n");
leihen 2:ee81f2c5a706 154 INFO("[Reg:0x07] = %02x\n", reg);
leihen 2:ee81f2c5a706 155
leihen 2:ee81f2c5a706 156 if (!write(7, &reg, 1)) {
leihen 2:ee81f2c5a706 157 ERR("Failed to write register value !\n");
leihen 2:ee81f2c5a706 158 return false;
leihen 2:ee81f2c5a706 159 }
leihen 2:ee81f2c5a706 160
leihen 2:ee81f2c5a706 161 INFO("Successfully changed the square wave output.\n");
leihen 2:ee81f2c5a706 162 return true;
leihen 2:ee81f2c5a706 163 }
leihen 2:ee81f2c5a706 164
leihen 2:ee81f2c5a706 165
leihen 1:64274190e842 166
leihen 1:64274190e842 167 bool Rtc_Ds1307::read(int address, char *buffer, int len)
leihen 1:64274190e842 168 {
leihen 1:64274190e842 169 char buffer2[2] = {(char)address, 0};
leihen 1:64274190e842 170
leihen 2:ee81f2c5a706 171 // m_rtc->start();
leihen 1:64274190e842 172 if (m_rtc->write(0xd0, buffer2, 1) != 0) {
leihen 1:64274190e842 173 ERR("Failed to write register address on rtv!\n");
leihen 1:64274190e842 174 m_rtc->stop();
leihen 1:64274190e842 175 return false;
leihen 1:64274190e842 176 }
leihen 1:64274190e842 177 if (m_rtc->read(0xd0, buffer, len) != 0) {
leihen 1:64274190e842 178 ERR("Failed to read register !\n");
leihen 1:64274190e842 179 return false;
leihen 1:64274190e842 180 }
leihen 1:64274190e842 181 m_rtc->stop();
leihen 1:64274190e842 182
leihen 1:64274190e842 183 INFO("Successfully read %d registers from RTC\n", len);
leihen 1:64274190e842 184 return true;
leihen 1:64274190e842 185 }
leihen 1:64274190e842 186
leihen 1:64274190e842 187 bool Rtc_Ds1307::write(int address, char *buffer, int len)
leihen 1:64274190e842 188 {
leihen 1:64274190e842 189 char buffer2[10];
leihen 1:64274190e842 190 buffer2[0] = address&0xFF;
leihen 1:64274190e842 191 for (int i = 0 ; i < len ; i++)
leihen 1:64274190e842 192 buffer2[i+1] = buffer[i];
leihen 1:64274190e842 193
leihen 2:ee81f2c5a706 194 // m_rtc->start();
leihen 1:64274190e842 195 if (m_rtc->write(0xd0, buffer2, len+1) != 0) {
leihen 1:64274190e842 196 ERR("Failed to write data to rtc\n");
leihen 1:64274190e842 197 m_rtc->stop();
leihen 1:64274190e842 198 return false;
leihen 1:64274190e842 199 }
leihen 1:64274190e842 200 m_rtc->stop();
leihen 1:64274190e842 201 return true;
leihen 7:dca20be3ef38 202 }
leihen 7:dca20be3ef38 203
leihen 7:dca20be3ef38 204
leihen 7:dca20be3ef38 205
leihen 7:dca20be3ef38 206
leihen 7:dca20be3ef38 207 RtcCls::RtcCls(PinName sda, PinName scl, PinName sqw, bool bUseSqw)
leihen 7:dca20be3ef38 208 : Rtc_Ds1307(sda, scl), m_sqw(sqw), m_bUseSqw(bUseSqw), m_bAlarmEnabled(false), m_alarmfunc(NULL)
leihen 7:dca20be3ef38 209 {
leihen 9:5627b407e097 210 Time_rtc t;
leihen 9:5627b407e097 211 // query time from device
leihen 9:5627b407e097 212 getTime(t);
leihen 9:5627b407e097 213 // sync the time with MBED RTC
leihen 9:5627b407e097 214 struct tm now = {t.sec, t.min, t.hour, t.date, t.mon-1, t.year-1900};
leihen 9:5627b407e097 215 m_time = mktime(&now);
leihen 9:5627b407e097 216 set_time(m_time);
leihen 9:5627b407e097 217
leihen 7:dca20be3ef38 218 // Only register the callback and start the SQW if requested to do so. Otherwise the system
leihen 7:dca20be3ef38 219 // will use the MBED built-in RTC.
leihen 7:dca20be3ef38 220 if (m_bUseSqw) {
leihen 7:dca20be3ef38 221 // start the wave
leihen 7:dca20be3ef38 222 setSquareWaveOutput(true, RS1Hz);
leihen 7:dca20be3ef38 223 // register callback from now on the time will be maintained by the square wave input
leihen 7:dca20be3ef38 224 m_sqw.rise(this, &RtcCls::_callback);
leihen 7:dca20be3ef38 225 }
leihen 7:dca20be3ef38 226 }
leihen 7:dca20be3ef38 227
leihen 7:dca20be3ef38 228 void RtcCls::_callback(void)
leihen 7:dca20be3ef38 229 {
leihen 8:d0e66fa78e79 230 // INFO("Tick!");
leihen 7:dca20be3ef38 231 // Simply increase the number of seconds
leihen 7:dca20be3ef38 232 m_time++;
leihen 8:d0e66fa78e79 233 // if (m_bAlarmEnabled && (m_time == m_alarmTime)) {
leihen 8:d0e66fa78e79 234 // if (m_alarmfunc != NULL)
leihen 8:d0e66fa78e79 235 // m_alarmfunc();
leihen 8:d0e66fa78e79 236 // m_bAlarmEnabled = false;
leihen 8:d0e66fa78e79 237 // }
leihen 7:dca20be3ef38 238 }
leihen 7:dca20be3ef38 239
leihen 7:dca20be3ef38 240 time_t RtcCls::getTime()
leihen 7:dca20be3ef38 241 {
leihen 7:dca20be3ef38 242 // when not using the HW support, we have to query the RTC chip. Other wise we can just return out stored value
leihen 7:dca20be3ef38 243 if (!m_bUseSqw) {
leihen 7:dca20be3ef38 244 Time_rtc t;
leihen 7:dca20be3ef38 245 getTime(t);
leihen 8:d0e66fa78e79 246 struct tm now = {t.sec, t.min, t.hour, t.date, t.mon-1, t.year-1900};
leihen 7:dca20be3ef38 247 m_time = mktime(&now);
leihen 8:d0e66fa78e79 248 INFO("getting time %02d.%02d.%04d %02d:%02d:%02d Ticks=%08lx", t.date, t.mon, t.year, t.hour, t.min, t.sec, m_time);
leihen 8:d0e66fa78e79 249 }
leihen 8:d0e66fa78e79 250 else {
leihen 8:d0e66fa78e79 251 INFO("getting time Ticks=%08lx", m_time);
leihen 7:dca20be3ef38 252 }
leihen 7:dca20be3ef38 253 return m_time;
leihen 7:dca20be3ef38 254 }
leihen 7:dca20be3ef38 255
leihen 7:dca20be3ef38 256 void RtcCls::setTime(time_t t)
leihen 7:dca20be3ef38 257 {
leihen 7:dca20be3ef38 258 Time_rtc tim;
leihen 7:dca20be3ef38 259 struct tm *now;
leihen 7:dca20be3ef38 260 now = localtime(&t);
leihen 7:dca20be3ef38 261
leihen 7:dca20be3ef38 262 tim.sec = now->tm_sec;
leihen 7:dca20be3ef38 263 tim.min = now->tm_min;
leihen 7:dca20be3ef38 264 tim.hour = now->tm_hour;
leihen 7:dca20be3ef38 265 tim.date = now->tm_mday;
leihen 8:d0e66fa78e79 266 tim.mon = now->tm_mon+1;
leihen 7:dca20be3ef38 267 tim.year = now->tm_year + 1900;
leihen 7:dca20be3ef38 268 tim.wday = now->tm_wday +1;
leihen 7:dca20be3ef38 269
leihen 7:dca20be3ef38 270 setTime( tim, true, true);
leihen 8:d0e66fa78e79 271 set_time(t);
leihen 7:dca20be3ef38 272 }