This is a RTC additional function. This is only for Nucleo F401RE & F411RE mbed(Added L152RE, F334R8, L476RG & F746xx). If you connected battery backup circuit for internal RTC, you can make a power-off and reset condition. RTC still has proper time and date.

Dependents:   Nucleo_rtos_sample PB_Emma_Ethernet

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

modify_info_L476.h

Committer:
kenjiArai
Date:
2016-07-02
Revision:
14:78e453d7bb85
Parent:
13:44e5327acb05

File content as of revision 14:78e453d7bb85:

/*
 * mbed Application program
 *      Library differ part (This is only information document)
 *
 * Copyright (c) 2016 Kenji Arai / JH1PJL
 *  http://www.page.sannet.ne.jp/kenjia/index.html
 *  http://mbed.org/users/kenjiArai/
 *      Created: May       28th, 2016
 *      Revised: July       2nd, 2016
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
//*************************************************************************************************
//  Replace following files in the library
//      rtc_api.c -> rtc_api_L476.c
//*************************************************************************************************
//
// (1) Update mbed-dev library if you want
// (2) File rtc_api_L476.c copy to directry
//     /mbed-dev/targets/hal/TARGET_STM/TARGET_STM32L4/
// (3) Delete rtc_api.c in the same directory
// (4) Edit rtc_api_L476.c
//     Modify 1st line #if 0 --> #if 1
//