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.
Revision 4:d2cc690aaac7, committed 2013-06-23
- Comitter:
- leihen
- Date:
- Sun Jun 23 16:29:35 2013 +0000
- Parent:
- 3:e89d63f3342e
- Child:
- 5:30531f2121a2
- Commit message:
- Added a RTC wrapper class.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/RtcCls.c Sun Jun 23 16:29:35 2013 +0000
@@ -0,0 +1,68 @@
+#include "RtcCls.h"
+#define DEBUG
+#include "debug.h"
+
+
+
+
+RtcCls::RtcCls(PinName sda, PinName scl, PinName sqw, bool bUseSqw)
+ : Rtc_Ds1307(sda, scl), m_sqw(sqw), m_bUseSqw(bUseSqw), m_bAlarmEnabled(false), m_alarmfunc(NULL)
+{
+ // Only register the callback and start the SQW if requested to do so. Otherwise the system
+ // will use the MBED built-in RTC.
+ if (m_bUseSqw) {
+ Time t;
+ // start the wave
+ setSquareWaveOutput(true, RS_1Hz);
+ // query time
+ getTime(t);
+ struct tm now = {t.sec, t.min, t.hour, t.date, t.mon, t.year};
+ m_time = mktime(&tm);
+ // register callback from now on the time will be maintained by the square wave input
+ m_sqw.rise(_callback);
+ }
+}
+
+void RtcCls::_callback(void)
+{
+ // Simply increase the number of seconds
+ m_time++;
+ if (m_bAlarmEnabled && (m_time == m_alarmTime)) {
+ if (m_alarmfunc != NULL)
+ m_alarmfunc();
+ m_bAlarmEnabled = false;
+ }
+}
+
+time_t RtcCls::getTime()
+{
+ // when not using the HW support, we have to query the RTC chip. Other wise we can just return out stored value
+ if (!m_bUseSqw) {
+ Time t;
+ getTime(t);
+ struct tm now = {t.sec, t.min, t.hour, t.date, t.mon, t.year};
+ m_time = mktime(&tm);
+ }
+ return m_time;
+}
+
+void RtcCls::setTime(time_t t)
+{
+ Time tim;
+ struct tm *now;
+ now = localtime(&t);
+
+ tim.sec = now->tm_sec;
+ tim.min = now->tm_min;
+ tim.hour = now->tm_hour;
+ tim.date = now->tm_mday;
+ tim.mon = now->tm_mon;
+ tim.year = now->tm_year + 1900;
+ tim.wday = now->tm_wday +1;
+
+ setTime( tim, true, true);
+}
+
+
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/RtcCls.h Sun Jun 23 16:29:35 2013 +0000
@@ -0,0 +1,38 @@
+#ifndef __RTC_H__
+#define __RTC_H__
+
+#include "Rtc_Ds1307.h"
+#include "mbed.h"
+
+typedef void (*callback_t)(void);
+
+class RtcCls : public Rtc_Ds1307
+{
+ protected:
+ InterruptIn m_sqw;
+ bool m_bUseSqw;
+ time_t m_time; // Only used in case of SQW use
+
+ bool m_bAlarmEnabled;
+ callback_t m_alarmfunc;
+ time_t m_alarmTime;
+
+ public:
+ RtcCls(PinName sda, PinName scl, PinName sqw, bool bUseSqw);
+
+ protected:
+ static void _callback(void);
+
+ public:
+ time_t getTime();
+ void setTime(time_t t);
+ public:
+ void setAlarm(int nSeconds, callback_t alarmfunc)
+ {
+ m_alarmfunc = alarmfunc;
+ m_alarmTime = m_time + nSeconds;
+ m_bAlarmEnabled = (alarmfunc == NULL) ? false : true;
+ }
+};
+
+#endif // __RTC_H__
\ No newline at end of file
--- a/Rtc_Ds1307.cpp Sun Jun 23 11:26:26 2013 +0000
+++ b/Rtc_Ds1307.cpp Sun Jun 23 16:29:35 2013 +0000
@@ -1,7 +1,8 @@
/* Rtc_Ds1307.cpp */
#include "Rtc_Ds1307.h"
-#define DEBUG
+//#define DEBUG
+#undef DEBUG
#include "debug.h"
const char *Rtc_Ds1307::m_weekDays[] = { "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" };