Diff: Rtc_Ds1307.cpp

Revision:

7:dca20be3ef38

Parent:

5:30531f2121a2

Child:

8:d0e66fa78e79

--- a/Rtc_Ds1307.cpp	Sun Jun 23 18:26:47 2013 +0000
+++ b/Rtc_Ds1307.cpp	Sun Jun 23 18:48:59 2013 +0000
@@ -1,6 +1,6 @@
-/* Rtc_Ds1307.cpp */
 #include "mbed.h"
 #include "Rtc_Ds1307.h"
+
 #ifndef DEBUG
 //#define DEBUG
 #endif
@@ -197,4 +197,65 @@
     }
     m_rtc->stop();
     return true;
-}
\ No newline at end of file
+}
+
+
+
+
+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_rtc t;
+        //  start the wave
+        setSquareWaveOutput(true, RS1Hz);
+        //  query time
+        getTime(t);
+        struct tm now = {t.sec, t.min, t.hour, t.date, t.mon, t.year};
+        m_time = mktime(&now);
+        //  register callback from now on the time will be maintained by the square wave input
+        m_sqw.rise(this, &RtcCls::_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_rtc t;
+        getTime(t);
+        struct tm now = {t.sec, t.min, t.hour, t.date, t.mon, t.year};
+        m_time = mktime(&now);
+    }
+    return m_time;
+}
+
+void RtcCls::setTime(time_t t)
+{
+    Time_rtc 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);
+}