Andy K
Allows for a GPS module to be connected to a serial port and exposes an easy to use API to get the GPS data. New feature, added Mbed/LPC17xx RTC synchronisation
Dependents: SatGPS AntiTheftGPS FLIGHT_CONTROL_AND_COMMUNICATIONS_SYSTEM GPS-Lora ... more
Revision 5:7f130f85d5a4, committed 2011-04-20
- Comitter:
- AjK
- Date:
- Wed Apr 20 09:15:07 2011 +0000
- Parent:
- 4:1e3a53f150aa
- Child:
- 6:64771e31464e
- Commit message:
- 1.15 See ChangeLog.c
Changed in this revision
--- a/ChangeLog.c Sat Apr 16 09:41:43 2011 +0000
+++ b/ChangeLog.c Wed Apr 20 09:15:07 2011 +0000
@@ -75,5 +75,12 @@
1.14 - 16/04/2011
* Doh, left in some debugging code which causes compile fail outside
- of the test harness.
+ of the test harness.
+
+1.15 - 20/04/2011
+
+ * Added the new feature that allows the library to set the Mbed RTC
+ to the GPS/UTC time. This ensures the RTC is kept up to date with
+ the latest GPS aquired time (syncs once each minute).
+
*/
--- a/GPS.cpp Sat Apr 16 09:41:43 2011 +0000
+++ b/GPS.cpp Wed Apr 20 09:15:07 2011 +0000
@@ -141,6 +141,14 @@
}
process_required = false;
}
+
+ // If we have a valid GPS time then, once per minute, set the RTC.
+ if (theTime.status == 'A' && theTime.second == 0 && theTime.tenths == 0 && theTime.hundreths == 0) {
+ // set_time() is defined in rtc_time.h
+ // http://mbed.org/projects/libraries/svn/mbed/trunk/rtc_time.h
+ set_time(theTime.to_C_tm());
+ }
+
}
void
--- a/GPS_Time.cpp Sat Apr 16 09:41:43 2011 +0000
+++ b/GPS_Time.cpp Wed Apr 20 09:15:07 2011 +0000
@@ -39,6 +39,29 @@
magvar = 0;
}
+time_t
+GPS_Time::to_C_tm(bool set)
+{
+ GPS_Time t;
+ tm ct;
+ time_t q;
+
+ timeNow(&t);
+ ct.tm_sec = t.second;
+ ct.tm_min = t.minute;
+ ct.tm_hour = t.hour;
+ ct.tm_mday = t.day;
+ ct.tm_mon = t.month - 1;
+ ct.tm_year = t.year - 1900;
+ ct.tm_isdst = 0; // GPS has no understanding of DST.
+
+ q = mktime(&ct);
+ if (set) {
+ set_time(q);
+ }
+ return q;
+}
+
GPS_Time *
GPS_Time::timeNow(GPS_Time *n)
{
--- a/GPS_Time.h Sat Apr 16 09:41:43 2011 +0000
+++ b/GPS_Time.h Wed Apr 20 09:15:07 2011 +0000
@@ -78,6 +78,7 @@
double siderealDegrees(GPS_Time *t, double longitude);
double siderealHA(double jd, double longitude);
double siderealHA(GPS_Time *t, double longitude);
+ time_t to_C_tm(bool set = false);
};
#endif