STM32F107VC/Using the RTC Real Time Clock - Revision history

Heth: /* header file */

2017-10-03T07:18:14Z

‎header file

Heth at 07:13, 3 October 2017

2017-10-03T07:13:11Z

Heth at 06:58, 3 October 2017

2017-10-03T06:58:24Z

Heth at 06:39, 9 March 2017

2017-03-09T06:39:39Z

Heth at 12:04, 24 November 2016

2016-11-24T12:04:59Z

Heth at 06:35, 17 November 2016

2016-11-17T06:35:07Z

Heth at 06:34, 17 November 2016

2016-11-17T06:34:51Z

Heth at 06:30, 17 November 2016

2016-11-17T06:30:25Z

Heth at 09:17, 14 November 2016

2016-11-14T09:17:10Z

Heth at 07:13, 3 November 2016

2016-11-03T07:13:24Z

@@ Line 425: / Line 425: @@
 <source lang=c>
 #include <stdint.h>
-#define SEC_MINUT				  60
+/* Days in month's non-leap year jan, feb...*/
-#define SEC_HOUR				 (60 * SEC_MINUT)
+extern const uint8_t daysmd[];
-#define SEC_DAY					 (24 * SEC_HOUR)
+/* Calculting current time from epoch in seconds.
-#define SEC_YEAR				(365 * SEC_DAY)
+Epoch: 1/1-1970 00:00:00
-struct TimeStruct
+Leap year: In a leap year february has 29 days instead of normal 28.
+ A leap year is defined as a year evenly divisble by 4 or 400. Execpt for years
-	uint32_t epoch; // Seconds since 1. jan 1970 00:00:00
+ evenly divisble by 100 but not 400.
-	uint32_t tz;    // Timezone +/- x seconds from GMT
+*/
-	uint32_t year;  // year						197 to 2106
-	uint32_t sec;   // seconds				 00 to   59
+#define SECONDSDAY  (24*60*60)
-	uint32_t mS;    // micro seconds	 00 to  999
+#define SECONDSYEAR (365*SECONDSDAY)
-	uint32_t min;   // minutes				 00 to   59
-	uint32_t hour;  // hours					 00 to   23
+struct TimeStruct {
-	uint32_t mday;  // day of the month 1 to	 31
+        uint32_t    epoch;      // Seconds since 1. jan 1970 00:00:00
-	uint32_t mon;		// month					  0 to   11
+				uint32_t     tz;         // Timezone +/- x seconds from GMT
-	uint32_t wday;	// day of the week  0 to    6 (0 = sunday)
+        uint32_t    year;       // year                 1970 to 2106
 };
-extern void rtcInit(void);
+extern char const *time2epoch( struct TimeStruct *t);
-extern char const *addTimeStructEpochToRTC();
+extern void epoch2time( struct TimeStruct *t);
-extern char const *addEpochToRTC(uint32_t epoch);
+extern char const *rtc_init(void);
-extern char const *setTimeStructFromRTC();
+extern unsigned int rtccnt( void );
-extern void timeFromEpoch(struct TimeStruct *time);
+extern char const *rtcsetcnt( uint32_t value);
 </source>
 =Initializing the RTC=
 ;Goals

@@ Line 422: / Line 422: @@
 </source>
 =Initializing the RTC=
 ;Goals

@@ Line 255: / Line 255: @@
 	return( (high << 16) | low );
+}
-</source>
 /* time2epoch  calculates epoch from initialized TimeStruct structure t.
 t must contain year, mon, mday, hour, min, sec
@@ Line 423: / Line 422: @@
 </source>
--->
 =Initializing the RTC=
 ;Goals

@@ Line 49: / Line 49: @@
 #define TRUE  1
 #define FALSE 0
-#define COUNT_TO 1000000 // Almost randomly chosen delay count
+#define COUNT_TO 30000000 // Almost randomly delay count (Experimentation)
 /*************************** Used registers *******************************/
 //Define where in the memory the RTC start address peripheral is located

@@ Line 423: / Line 423: @@
 </source>
+-->
 =Initializing the RTC=
 ;Goals
@@ Line 451: / Line 451: @@
 =Example=
 *[http://mars.tekkom.dk/data/embedded/usartpoll_RTC.zip Keil uVision example of RTC]
--->
 =Links=
 *[[Const and volatile type qualifiers]]

@@ Line 25: / Line 25: @@
 : Converting between epoch time and human time
 	     epoch time: seconds elapsed since 1970 jan 1 - 00:00:00
-	     human time: year, month, date, weekday,  hour and seconds
+	     human time: year, month, date, weekday, hour, minute and seconds
 : Setting/canceling alarms
 : Handling leap-years

@@ Line 1: / Line 1: @@
 {{TOCright}}
 Preparing for programming the STM32F107VC Real Time Clock.
 <source lang=c>
 /**************************************************************************
@@ Line 449: / Line 450: @@
 =Example=
 *[http://mars.tekkom.dk/data/embedded/usartpoll_RTC.zip Keil uVision example of RTC]
+-->
 =Links=
 *[[Const and volatile type qualifiers]]