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/
uart_as_stdio/uart_as_stdio.h
- Committer:
- kenjiArai
- Date:
- 2021-03-06
- Revision:
- 14:4b03106ece1f
File content as of revision 14:4b03106ece1f:
/* * mbed Application program * Redirect Standard Input/Output * * Copyright (c) 2021 Kenji Arai / JH1PJL * http://www7b.biglobe.ne.jp/~kenjia/ * https://os.mbed.com/users/kenjiArai/ * Created: January 13th, 2021 * Revised: January 14th, 2021 */ #include "mbed.h" // Function prototypes -------------------------------------------------------- uint8_t readable(void); void putc(uint8_t c); uint8_t getc(void); void sleep_preparation(void);