Add API's to convert epoch time to date/time component

Author: sandeepmistry

libraries/CurieTime/src/CurieTime.cpp

@@ -32,50 +32,93 @@ unsigned long now()
     return *RTC_CCVR;
 }
 
-struct tm* nowTm() {
-    time_t t = now();
+struct tm* tTm(unsigned long  t)
+{
+    time_t time = t;
 
-    return gmtime(&t);
+    return gmtime(&time);
 }
 
 int year()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return year(t);
+}
+
+int year(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return (tm->tm_year + YEAR_OFFSET);
 }
 
 int month()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return month(t);
+}
+
+int month(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return (tm->tm_mon + MONTH_OFFSET);
 }
 
 int day()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return day(t);
+}
+
+int day(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return tm->tm_mday;
 }
 
 int hour()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return hour(t);
+}
+
+int hour(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return tm->tm_hour;
 }
 
 int minute()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return minute(t);
+}
+
+int minute(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return tm->tm_min;
 }
 
 int second()
 {
-    struct tm* tm = nowTm();
+    unsigned long t = now();
+
+    return second(t);
+}
+
+int second(unsigned long t)
+{
+    struct tm* tm = tTm(t);
 
     return tm->tm_sec;
 }

libraries/CurieTime/src/CurieTime.h

@@ -13,14 +13,23 @@
 #define RTC_RSTAT   0xb0000414 // Interrupt Raw Status Register
 #define RTC_EOI     0xb0000418 // End of Interrupt Register
 
+// The following API is based on Paul Stoffregen's Arduino Time Library:
+//   https://github.com/PaulStoffregen/Time 
+
 unsigned long now(); // current time as seconds since Jan 1 1970 
 
-int year(); // current year as an integer
-int month(); // current month as an integer (1 - 12)
-int day(); // current day as an integer (1 - 31)
-int hour(); // current hour as an integer (0 - 23)
-int minute(); // current minute as an integer (0 - 59)
-int second(); // current second as an integer (0 - 59)
+int year();                     // current year as an integer
+int year(unsigned long  t);     // year of t as an integer
+int month();                    // current month as an integer (1 - 12)
+int month(unsigned long  t);    // month of t as an integer (1 - 12)
+int day();                      // current day as an integer (1 - 31)
+int day(unsigned long  t);      // day of t as an integer (1 - 31)
+int hour();                     // current hour as an integer (0 - 23)
+int hour(unsigned long  t);     // hour of t as an integer (0 - 23)
+int minute();                   // current minute as an integer (0 - 59)
+int minute(unsigned long  t);   // minute of t as an integer (0 - 59)
+int second();                   // current second as an integer (0 - 59)
+int second(unsigned long  t);   // second of t as an integer (0 - 59)
 
 void setTime(int hour, int minute, int second, int day, int month, int year); // set the current time
 void setTime(unsigned long t); // set the current time from seconds since Jan 1 1970