Kenji Arai / Mbed OS Nucleo_RTC_battery_bkup_pwr_off_okay

In the past, you need modify rtc_api.c in mbed-dev source code. From this revision, you can just use RTC function all of conditions (Normal, Reset, Stand-by, Power OFF).

Note

From now on, you do NOT need any modification for mbed-dev library because STM team updates rtc_api.c source code and support RTC function under reset & standby condition includes power off condition (You need additional VBAT back-up hardware).

Please refer following NOTE information.
/users/kenjiArai/notebook/nucleo-series-rtc-control-under-power-onoff-and-re/

Diff: check_revision.cpp

Revision:
11:2e514d955a2b
Parent:
10:806cfec92eb6
Child:
12:8cb1f89541d1
--- a/check_revision.cpp	Sat Jul 18 22:46:14 2020 +0000
+++ b/check_revision.cpp	Sat Aug 01 07:26:13 2020 +0000
@@ -5,7 +5,7 @@
  *  http://www7b.biglobe.ne.jp/~kenjia/
  *  https://os.mbed.com/users/kenjiArai/
  *      Created:    July      17th, 2019
- *      Revised:    July      19th, 2020
+ *      Revised:    August     1st, 2020
  */
 
 #include "mbed.h"
@@ -16,7 +16,7 @@
     (MBED_MINOR_VERSION == 2) &&\
     (MBED_PATCH_VERSION == 0)
 #else
-#   warning "if you see a version 5.15.4 looks 6.2.0 (as of July 19,'20)"
+#   error "Please use mbed-os-6.2.0"
 #endif
 
 void print_revision(void)