Xadow Watch with RGB OLED
Dependents: Xadow_Watch_RGBOLED Xadow_Watch_RGBOLED
DS1337.cpp@0:9d7c6f478d8c, 2014-04-01 (annotated)
- Committer:
- loovee
- Date:
- Tue Apr 01 07:02:12 2014 +0000
- Revision:
- 0:9d7c6f478d8c
..;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
loovee | 0:9d7c6f478d8c | 1 | |
loovee | 0:9d7c6f478d8c | 2 | #include "DS1337.h" |
loovee | 0:9d7c6f478d8c | 3 | |
loovee | 0:9d7c6f478d8c | 4 | |
loovee | 0:9d7c6f478d8c | 5 | // NOTE: To keep the math from getting even more lengthy/annoying than it already is, the following constraints are imposed: |
loovee | 0:9d7c6f478d8c | 6 | // 1) All times are in 24-hour format (military time) |
loovee | 0:9d7c6f478d8c | 7 | // 2) DayOfWeek field is not used internally or checked for validity. Alarm functions may optionally set alarms repeating on DayOfWeek, but this feature has not been tested yet. |
loovee | 0:9d7c6f478d8c | 8 | // 3) This library's buffer stores all times in raw BCD format, just as it is sent from the RTC. |
loovee | 0:9d7c6f478d8c | 9 | // It is not converted to/from 'real' (binary) values until needed via get...() and set...() functions. |
loovee | 0:9d7c6f478d8c | 10 | // In other words, don't go hacking around and reading from the rtc_bcd[] buffer directly, unless you want the raw BCD results. |
loovee | 0:9d7c6f478d8c | 11 | |
loovee | 0:9d7c6f478d8c | 12 | |
loovee | 0:9d7c6f478d8c | 13 | // Cumulative number of days elapsed at the start of each month, assuming a normal (non-leap) year. |
loovee | 0:9d7c6f478d8c | 14 | unsigned int monthdays[] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; |
loovee | 0:9d7c6f478d8c | 15 | |
loovee | 0:9d7c6f478d8c | 16 | DS1337::DS1337(PinName sda, PinName scl ) : i2c(sda,scl) { |
loovee | 0:9d7c6f478d8c | 17 | i2c.frequency(I2C_FREQ); |
loovee | 0:9d7c6f478d8c | 18 | } |
loovee | 0:9d7c6f478d8c | 19 | |
loovee | 0:9d7c6f478d8c | 20 | unsigned char DS1337::getRegister(unsigned char registerNumber) |
loovee | 0:9d7c6f478d8c | 21 | { |
loovee | 0:9d7c6f478d8c | 22 | uint8_t val = registerNumber; |
loovee | 0:9d7c6f478d8c | 23 | |
loovee | 0:9d7c6f478d8c | 24 | i2c.write(DS1337_CTRL_ID,(char *)&val,1); |
loovee | 0:9d7c6f478d8c | 25 | i2c.stop(); |
loovee | 0:9d7c6f478d8c | 26 | i2c.read(DS1337_CTRL_ID, (char *)&val, 1); |
loovee | 0:9d7c6f478d8c | 27 | return val; |
loovee | 0:9d7c6f478d8c | 28 | } |
loovee | 0:9d7c6f478d8c | 29 | |
loovee | 0:9d7c6f478d8c | 30 | void DS1337::setRegister(unsigned char registerNumber, unsigned char value) |
loovee | 0:9d7c6f478d8c | 31 | { |
loovee | 0:9d7c6f478d8c | 32 | uint8_t val[2]; |
loovee | 0:9d7c6f478d8c | 33 | val[0] = registerNumber; |
loovee | 0:9d7c6f478d8c | 34 | val[1] = value; |
loovee | 0:9d7c6f478d8c | 35 | i2c.write(DS1337_CTRL_ID, (char *)val, 2); |
loovee | 0:9d7c6f478d8c | 36 | } |
loovee | 0:9d7c6f478d8c | 37 | |
loovee | 0:9d7c6f478d8c | 38 | void DS1337::readTime(void) |
loovee | 0:9d7c6f478d8c | 39 | { |
loovee | 0:9d7c6f478d8c | 40 | uint8_t val = 0x00; |
loovee | 0:9d7c6f478d8c | 41 | |
loovee | 0:9d7c6f478d8c | 42 | i2c.write(DS1337_CTRL_ID,(char *)&val,1); |
loovee | 0:9d7c6f478d8c | 43 | i2c.stop(); |
loovee | 0:9d7c6f478d8c | 44 | i2c.read(DS1337_CTRL_ID, (char *)rtc_bcd, 7); |
loovee | 0:9d7c6f478d8c | 45 | } |
loovee | 0:9d7c6f478d8c | 46 | |
loovee | 0:9d7c6f478d8c | 47 | unsigned char DS1337::getSeconds() |
loovee | 0:9d7c6f478d8c | 48 | { |
loovee | 0:9d7c6f478d8c | 49 | return bcd2bin(rtc_bcd[DS1337_SEC]); |
loovee | 0:9d7c6f478d8c | 50 | } |
loovee | 0:9d7c6f478d8c | 51 | |
loovee | 0:9d7c6f478d8c | 52 | unsigned char DS1337::getMinutes() |
loovee | 0:9d7c6f478d8c | 53 | { |
loovee | 0:9d7c6f478d8c | 54 | return bcd2bin(rtc_bcd[DS1337_MIN]); |
loovee | 0:9d7c6f478d8c | 55 | } |
loovee | 0:9d7c6f478d8c | 56 | unsigned char DS1337::getHours() |
loovee | 0:9d7c6f478d8c | 57 | { |
loovee | 0:9d7c6f478d8c | 58 | return bcd2bin(rtc_bcd[DS1337_HR]); |
loovee | 0:9d7c6f478d8c | 59 | } |
loovee | 0:9d7c6f478d8c | 60 | unsigned char DS1337::getDays() |
loovee | 0:9d7c6f478d8c | 61 | { |
loovee | 0:9d7c6f478d8c | 62 | return bcd2bin(rtc_bcd[DS1337_DATE]); |
loovee | 0:9d7c6f478d8c | 63 | } |
loovee | 0:9d7c6f478d8c | 64 | unsigned char DS1337::getDayOfWeek() |
loovee | 0:9d7c6f478d8c | 65 | { |
loovee | 0:9d7c6f478d8c | 66 | return bcd2bin(rtc_bcd[DS1337_DOW]); |
loovee | 0:9d7c6f478d8c | 67 | } |
loovee | 0:9d7c6f478d8c | 68 | unsigned char DS1337::getMonths() |
loovee | 0:9d7c6f478d8c | 69 | { |
loovee | 0:9d7c6f478d8c | 70 | return bcd2bin(rtc_bcd[DS1337_MTH]); |
loovee | 0:9d7c6f478d8c | 71 | } |
loovee | 0:9d7c6f478d8c | 72 | unsigned int DS1337::getYears() |
loovee | 0:9d7c6f478d8c | 73 | { |
loovee | 0:9d7c6f478d8c | 74 | return 2000 + bcd2bin(rtc_bcd[DS1337_YR]); |
loovee | 0:9d7c6f478d8c | 75 | } |
loovee | 0:9d7c6f478d8c | 76 | |
loovee | 0:9d7c6f478d8c | 77 | |
loovee | 0:9d7c6f478d8c | 78 | void DS1337::setSeconds(unsigned char v) |
loovee | 0:9d7c6f478d8c | 79 | { |
loovee | 0:9d7c6f478d8c | 80 | rtc_bcd[DS1337_SEC] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 81 | |
loovee | 0:9d7c6f478d8c | 82 | } |
loovee | 0:9d7c6f478d8c | 83 | void DS1337::setMinutes(unsigned char v) |
loovee | 0:9d7c6f478d8c | 84 | { |
loovee | 0:9d7c6f478d8c | 85 | rtc_bcd[DS1337_MIN] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 86 | |
loovee | 0:9d7c6f478d8c | 87 | } |
loovee | 0:9d7c6f478d8c | 88 | void DS1337::setHours(unsigned char v) |
loovee | 0:9d7c6f478d8c | 89 | { |
loovee | 0:9d7c6f478d8c | 90 | rtc_bcd[DS1337_HR] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 91 | |
loovee | 0:9d7c6f478d8c | 92 | } |
loovee | 0:9d7c6f478d8c | 93 | void DS1337::setDays(unsigned char v) |
loovee | 0:9d7c6f478d8c | 94 | { |
loovee | 0:9d7c6f478d8c | 95 | rtc_bcd[DS1337_DATE] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 96 | |
loovee | 0:9d7c6f478d8c | 97 | } |
loovee | 0:9d7c6f478d8c | 98 | void DS1337::setDayOfWeek(unsigned char v) |
loovee | 0:9d7c6f478d8c | 99 | { |
loovee | 0:9d7c6f478d8c | 100 | rtc_bcd[DS1337_DOW] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 101 | |
loovee | 0:9d7c6f478d8c | 102 | } |
loovee | 0:9d7c6f478d8c | 103 | void DS1337::setMonths(unsigned char v) |
loovee | 0:9d7c6f478d8c | 104 | { |
loovee | 0:9d7c6f478d8c | 105 | rtc_bcd[DS1337_MTH] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 106 | |
loovee | 0:9d7c6f478d8c | 107 | } |
loovee | 0:9d7c6f478d8c | 108 | void DS1337::setYears(unsigned int v) |
loovee | 0:9d7c6f478d8c | 109 | { |
loovee | 0:9d7c6f478d8c | 110 | if (v>1999) |
loovee | 0:9d7c6f478d8c | 111 | { |
loovee | 0:9d7c6f478d8c | 112 | v -= 2000; |
loovee | 0:9d7c6f478d8c | 113 | } |
loovee | 0:9d7c6f478d8c | 114 | rtc_bcd[DS1337_YR] = bin2bcd(v); |
loovee | 0:9d7c6f478d8c | 115 | |
loovee | 0:9d7c6f478d8c | 116 | } |
loovee | 0:9d7c6f478d8c | 117 | |
loovee | 0:9d7c6f478d8c | 118 | void DS1337::setTime() |
loovee | 0:9d7c6f478d8c | 119 | { |
loovee | 0:9d7c6f478d8c | 120 | char set_[8]; |
loovee | 0:9d7c6f478d8c | 121 | set_[0] = 0x00; |
loovee | 0:9d7c6f478d8c | 122 | for(int i=0; i<7; i++) |
loovee | 0:9d7c6f478d8c | 123 | { |
loovee | 0:9d7c6f478d8c | 124 | set_[i+1] = rtc_bcd[i]; |
loovee | 0:9d7c6f478d8c | 125 | } |
loovee | 0:9d7c6f478d8c | 126 | i2c.write(DS1337_CTRL_ID, set_, 8); |
loovee | 0:9d7c6f478d8c | 127 | } |
loovee | 0:9d7c6f478d8c | 128 | |
loovee | 0:9d7c6f478d8c | 129 | byte DS1337::bcd2bin(byte v) |
loovee | 0:9d7c6f478d8c | 130 | { |
loovee | 0:9d7c6f478d8c | 131 | return (v&0x0F) + ((v>>4)*10); |
loovee | 0:9d7c6f478d8c | 132 | } |
loovee | 0:9d7c6f478d8c | 133 | |
loovee | 0:9d7c6f478d8c | 134 | byte DS1337::bin2bcd(byte v) |
loovee | 0:9d7c6f478d8c | 135 | { |
loovee | 0:9d7c6f478d8c | 136 | return ((v / 10)<<4) + (v % 10); |
loovee | 0:9d7c6f478d8c | 137 | } |
loovee | 0:9d7c6f478d8c | 138 | |
loovee | 0:9d7c6f478d8c | 139 | void DS1337::stop(void) |
loovee | 0:9d7c6f478d8c | 140 | { |
loovee | 0:9d7c6f478d8c | 141 | setRegister(DS1337_SP, getRegister(DS1337_SP) | DS1337_SP_EOSC); |
loovee | 0:9d7c6f478d8c | 142 | } |
loovee | 0:9d7c6f478d8c | 143 | |
loovee | 0:9d7c6f478d8c | 144 | void DS1337::start(void) |
loovee | 0:9d7c6f478d8c | 145 | { |
loovee | 0:9d7c6f478d8c | 146 | setRegister(DS1337_SP, getRegister(DS1337_SP) & !DS1337_SP_EOSC); |
loovee | 0:9d7c6f478d8c | 147 | } |