pour olivier
Fork of RTC-DS1307 by
Diff: Rtc_Ds1307.h
- Revision:
- 1:64274190e842
- Parent:
- 0:3940f0ad2ca5
- Child:
- 2:ee81f2c5a706
diff -r 3940f0ad2ca5 -r 64274190e842 Rtc_Ds1307.h --- a/Rtc_Ds1307.h Sun Jun 02 09:59:39 2013 +0000 +++ b/Rtc_Ds1307.h Sun Jun 02 18:57:26 2013 +0000 @@ -25,6 +25,15 @@ #include "mbed.h" +typedef struct { + int sec; + int min; + int hour; + int wday; + int date; + int mon; + int year; +} Time; /** Class Rtc_Ds1307 implements the real time clock module DS1307 * @@ -35,7 +44,9 @@ class Rtc_Ds1307 { I2C* m_rtc; - + + static const char *m_weekDays[]; + public: /** public constructor which creates the real time clock object * @@ -48,9 +59,47 @@ ~Rtc_Ds1307(); - bool getTime(tm& time); + /** Read the current time from RTC chip + * + * @param time : reference to a struct tm which will be filled with the time from rtc + * + * @returns true if successful, otherwise an acknowledge error occured + */ + bool getTime(Time& time); + + /** Write the given time onto the RTC chip + * + * @param time : refereence to a struct which contains valid date and time information + * + * @param start : contains true if the clock shall start (or keep on running). + * + * @param thm : 12-hour-mode if set to true, otherwise 24-hour-mode will be set. + * + * @returns true if successful, otherwise an acknowledge error occured + */ + bool setTime(Time& time, bool start, bool thm); + - bool setTime(tm& time); + /** Service function to convert a weekday into a string representation + * + * @param wday : day of week to convert (starting with sunday = 1, monday = 2, ..., saturday = 7 + * + * @returns the corresponding string representation + */ + const char* weekdayToString( int wday ) + { return m_weekDays[wday%7]; } + + private: + bool read(int address, char* buffer, int len); + bool write(int address, char* buffer, int len); + + static int bcdToDecimal(int bcd) + { return ((bcd&0xF0)>>4)*10 + (bcd&0x0F); } + + static int decimalToBcd(int dec) + { return (dec%10) + ((dec/10)<<4); } + + };