Henry Leinen
Working Version of the Real Time Clock module DS1307.
Dependents: Rtc_Ds1307_Sample TAREA_5_PROCESADORES Rtc_Ds1307_lcd_alarma Rtc_Ds1307_Reloj_con_alarma_aplazable ... more
This is my implementation of the DS1307.
I plan to add functionality which will make use of the OSC Input and which will increment the time continuously. A query to the module will then only have to be made when the MBED has been powered down.
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); }
+
+
};