Joseph Ellsworth / compile_time_to_system_time

Function to convert compiler macro __DATE__ and __TIME__ to a system time that can be used to initialize the CPU RTC. I use this to do a 1 time initialization of a RTC chip.

Dependents:   xj-Init-clock-to-compile-time-if-not-already-initialized-ds1302

Parse compiler DATE and TIME into a time_t structure

I use this to initialize the system time RTC using set_time() to a value parsed from the DATE and TIME strings. I find it easier to recompile and reload the firmware than it is to manually type the time string.

Sample Use

https://developer.mbed.org/users/joeata2wh/code/xj-Init-clock-to-compile-time-if-not-alr extends the use of this library to set the DS1302 clock chip to the compile time only the first time the utility runs. After that it detects a sentinel already stored in the clock chip and used the previously saved time.

Referenced:

Files at this revision

API Documentation at this revision

Revision 2:c746c1b8671f, committed 2016-05-07

Comitter:
joeata2wh
Date:
Sat May 07 02:06:11 2016 +0000
Parent:
1:3e55cf9d76e6
Commit message:
month was 1 digit to high

Changed in this revision

compile_time_to_system_time.h Show annotated file Show diff for this revision Revisions of this file 
diff -r 3e55cf9d76e6 -r c746c1b8671f compile_time_to_system_time.h
--- a/compile_time_to_system_time.h	Wed Mar 30 14:49:56 2016 +0000
+++ b/compile_time_to_system_time.h	Sat May 07 02:06:11 2016 +0000
@@ -41,7 +41,7 @@
     sscanf(date, "%s %d %d", s_month, &t.tm_mday, &year);
     sscanf(time, "%2d %*c %2d %*c %2d", &t.tm_hour, &t.tm_min, &t.tm_sec);
     // Find where is s_month in month_names. Deduce month value.
-    t.tm_mon = (strstr(month_names, s_month) - month_names) / 3 + 1;    
+    t.tm_mon = (strstr(month_names, s_month) - month_names) / 3;    
     t.tm_year = year - 1900;    
     return mktime(&t);
 }