nsp
Fork of RTC-DS1307 by
Rtc_Ds1307.cpp@1:64274190e842, 2013-06-02 (annotated)
- Committer:
- leihen
- Date:
- Sun Jun 02 18:57:26 2013 +0000
- Revision:
- 1:64274190e842
- Parent:
- 0:3940f0ad2ca5
- Child:
- 2:ee81f2c5a706
First complete Version - untested.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
leihen | 0:3940f0ad2ca5 | 1 | /* Rtc_Ds1307.cpp */ |
leihen | 0:3940f0ad2ca5 | 2 | |
leihen | 0:3940f0ad2ca5 | 3 | #include "Rtc_Ds1307.h" |
leihen | 0:3940f0ad2ca5 | 4 | |
leihen | 1:64274190e842 | 5 | #define _DEBUG 1 |
leihen | 0:3940f0ad2ca5 | 6 | |
leihen | 0:3940f0ad2ca5 | 7 | |
leihen | 0:3940f0ad2ca5 | 8 | #if (_DEBUG && !defined(TARGET_LPC11U24)) |
leihen | 0:3940f0ad2ca5 | 9 | #define INFO(x, ...) std::printf("[Rtc_Ds1307 : INFO]"x"\r\n", ##__VA_ARGS__); |
leihen | 0:3940f0ad2ca5 | 10 | #define WARN(x, ...) std::printf("[Rtc_Ds1307 : WARN]"x"\r\n", ##__VA_ARGS__); |
leihen | 0:3940f0ad2ca5 | 11 | #define ERR(x, ...) std::printf("[Rtc_Ds1307 : ERR]"x"\r\n", ##__VA_ARGS__); |
leihen | 0:3940f0ad2ca5 | 12 | #else |
leihen | 0:3940f0ad2ca5 | 13 | #define INFO(x, ...) |
leihen | 0:3940f0ad2ca5 | 14 | #define WARN(x, ...) |
leihen | 0:3940f0ad2ca5 | 15 | #define ERR(x, ...) |
leihen | 0:3940f0ad2ca5 | 16 | #endif |
leihen | 0:3940f0ad2ca5 | 17 | |
leihen | 1:64274190e842 | 18 | const char *Rtc_Ds1307::m_weekDays[] = { "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" }; |
leihen | 0:3940f0ad2ca5 | 19 | |
leihen | 0:3940f0ad2ca5 | 20 | |
leihen | 0:3940f0ad2ca5 | 21 | Rtc_Ds1307::Rtc_Ds1307(PinName sda, PinName scl) |
leihen | 0:3940f0ad2ca5 | 22 | { |
leihen | 0:3940f0ad2ca5 | 23 | // Create a new I2C object |
leihen | 0:3940f0ad2ca5 | 24 | m_rtc = new I2C(sda, scl); |
leihen | 0:3940f0ad2ca5 | 25 | if (m_rtc == NULL) |
leihen | 0:3940f0ad2ca5 | 26 | error("Rtc_Ds1307"); |
leihen | 1:64274190e842 | 27 | |
leihen | 1:64274190e842 | 28 | // Set the frequency to standard 100kHz |
leihen | 1:64274190e842 | 29 | m_rtc->frequency(100000); |
leihen | 0:3940f0ad2ca5 | 30 | } |
leihen | 0:3940f0ad2ca5 | 31 | |
leihen | 0:3940f0ad2ca5 | 32 | Rtc_Ds1307::~Rtc_Ds1307() |
leihen | 0:3940f0ad2ca5 | 33 | { |
leihen | 0:3940f0ad2ca5 | 34 | if (m_rtc != NULL) |
leihen | 0:3940f0ad2ca5 | 35 | delete m_rtc; |
leihen | 0:3940f0ad2ca5 | 36 | } |
leihen | 0:3940f0ad2ca5 | 37 | |
leihen | 1:64274190e842 | 38 | bool Rtc_Ds1307::setTime(Time& time, bool start, bool thm) |
leihen | 0:3940f0ad2ca5 | 39 | { |
leihen | 1:64274190e842 | 40 | INFO("Setting new time : %d:%d:%d\n", time.hour, time.min, time.sec); |
leihen | 0:3940f0ad2ca5 | 41 | |
leihen | 0:3940f0ad2ca5 | 42 | return true; |
leihen | 0:3940f0ad2ca5 | 43 | } |
leihen | 0:3940f0ad2ca5 | 44 | |
leihen | 1:64274190e842 | 45 | bool Rtc_Ds1307::getTime(Time& time) |
leihen | 0:3940f0ad2ca5 | 46 | { |
leihen | 1:64274190e842 | 47 | char buffer[7]; |
leihen | 1:64274190e842 | 48 | bool bClock_halt = false; |
leihen | 1:64274190e842 | 49 | bool thm = false; |
leihen | 1:64274190e842 | 50 | |
leihen | 1:64274190e842 | 51 | INFO("Getting time from RTC\n"); |
leihen | 1:64274190e842 | 52 | if (read(0, buffer, 7) != 0) { |
leihen | 1:64274190e842 | 53 | // Failed to read |
leihen | 1:64274190e842 | 54 | ERR("Failed to read from RTC\n"); |
leihen | 1:64274190e842 | 55 | return false; |
leihen | 1:64274190e842 | 56 | } |
leihen | 1:64274190e842 | 57 | bClock_halt = ((buffer[0] & 128) == 128); |
leihen | 1:64274190e842 | 58 | thm = ((buffer[2] & 64) == 64); |
leihen | 1:64274190e842 | 59 | time.sec = bcdToDecimal(buffer[0]&0x7F); |
leihen | 1:64274190e842 | 60 | time.min = bcdToDecimal(buffer[1]); |
leihen | 1:64274190e842 | 61 | if (thm) { |
leihen | 1:64274190e842 | 62 | // in 12-hour-mode, we need to add 12 hours if PM bit is set |
leihen | 1:64274190e842 | 63 | time.hour = Rtc_Ds1307::bcdToDecimal( buffer[2] & 31 ); |
leihen | 1:64274190e842 | 64 | if ((buffer[2] & 32) == 32) |
leihen | 1:64274190e842 | 65 | time.hour += 12; |
leihen | 1:64274190e842 | 66 | } |
leihen | 1:64274190e842 | 67 | else { |
leihen | 1:64274190e842 | 68 | time.hour = Rtc_Ds1307::bcdToDecimal( buffer[2] & 63 ); |
leihen | 1:64274190e842 | 69 | } |
leihen | 1:64274190e842 | 70 | time.wday = buffer[3]; |
leihen | 1:64274190e842 | 71 | time.date = Rtc_Ds1307::bcdToDecimal( buffer[4]); |
leihen | 1:64274190e842 | 72 | time.mon = Rtc_Ds1307::bcdToDecimal( buffer[5]); |
leihen | 1:64274190e842 | 73 | time.year = Rtc_Ds1307::bcdToDecimal(buffer[6]) + 100; // plus hundret is because RTC is giving the years since 2000, but std c struct tm needs years since 1900 |
leihen | 1:64274190e842 | 74 | |
leihen | 1:64274190e842 | 75 | INFO("Clock is %s\n", bClock_halt ? "halted" : "running"); |
leihen | 0:3940f0ad2ca5 | 76 | return false; |
leihen | 0:3940f0ad2ca5 | 77 | } |
leihen | 1:64274190e842 | 78 | |
leihen | 1:64274190e842 | 79 | |
leihen | 1:64274190e842 | 80 | bool Rtc_Ds1307::read(int address, char *buffer, int len) |
leihen | 1:64274190e842 | 81 | { |
leihen | 1:64274190e842 | 82 | char buffer2[2] = {(char)address, 0}; |
leihen | 1:64274190e842 | 83 | |
leihen | 1:64274190e842 | 84 | m_rtc->start(); |
leihen | 1:64274190e842 | 85 | if (m_rtc->write(0xd0, buffer2, 1) != 0) { |
leihen | 1:64274190e842 | 86 | ERR("Failed to write register address on rtv!\n"); |
leihen | 1:64274190e842 | 87 | m_rtc->stop(); |
leihen | 1:64274190e842 | 88 | return false; |
leihen | 1:64274190e842 | 89 | } |
leihen | 1:64274190e842 | 90 | if (m_rtc->read(0xd0, buffer, len) != 0) { |
leihen | 1:64274190e842 | 91 | ERR("Failed to read register !\n"); |
leihen | 1:64274190e842 | 92 | return false; |
leihen | 1:64274190e842 | 93 | } |
leihen | 1:64274190e842 | 94 | m_rtc->stop(); |
leihen | 1:64274190e842 | 95 | |
leihen | 1:64274190e842 | 96 | INFO("Successfully read %d registers from RTC\n", len); |
leihen | 1:64274190e842 | 97 | return true; |
leihen | 1:64274190e842 | 98 | } |
leihen | 1:64274190e842 | 99 | |
leihen | 1:64274190e842 | 100 | bool Rtc_Ds1307::write(int address, char *buffer, int len) |
leihen | 1:64274190e842 | 101 | { |
leihen | 1:64274190e842 | 102 | char buffer2[10]; |
leihen | 1:64274190e842 | 103 | buffer2[0] = address&0xFF; |
leihen | 1:64274190e842 | 104 | for (int i = 0 ; i < len ; i++) |
leihen | 1:64274190e842 | 105 | buffer2[i+1] = buffer[i]; |
leihen | 1:64274190e842 | 106 | |
leihen | 1:64274190e842 | 107 | m_rtc->start(); |
leihen | 1:64274190e842 | 108 | if (m_rtc->write(0xd0, buffer2, len+1) != 0) { |
leihen | 1:64274190e842 | 109 | ERR("Failed to write data to rtc\n"); |
leihen | 1:64274190e842 | 110 | m_rtc->stop(); |
leihen | 1:64274190e842 | 111 | return false; |
leihen | 1:64274190e842 | 112 | } |
leihen | 1:64274190e842 | 113 | m_rtc->stop(); |
leihen | 1:64274190e842 | 114 | return true; |
leihen | 1:64274190e842 | 115 | } |