/**
@page RTC_Tamper_Init RTC example
@verbatim
******************************************************************************
* @file Examples_LL/RTC/RTC_Tamper_Init/readme.txt
* @author MCD Application Team
* @brief Description of the RTC example.
******************************************************************************
*
* Copyright (c) 2020 STMicroelectronics. All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
@endverbatim
@par Example Description
Configuration of the Tamper using the RTC LL API. The peripheral initialization
uses LL unitary service functions for optimization purposes (performance and size).
In this example, after start-up, SYSCLK is configured to the max frequency using the PLL with
MSI as clock source.
The RTC peripheral configuration is ensured by the Configure_RTC() function
(configure of the needed RTC resources according to the used hardware CLOCK,
PWR, RTC clock source and BackUp). You may update this function to change RTC configuration.
The associated firmware performs the following:
1. It configures the Tamper pin to be falling edge, and enables the Tamper
interrupt.
2. It writes the data to all RTC Backup data registers, then check whether the
data were correctly written. If yes, LED2 toggles with a fast period,
otherwise LED2 toggles with a period of 1s.
3. Applying a low level on the tamper 1 pin (PC13),
the RTC backup data registers are reset and the Tamper interrupt is generated.
The corresponding ISR then checks whether the RTC Backup data registers are cleared.
If yes LED2 turns on, otherwise LED2 toggles with a period of 1s.
@Note On this board, the tamper 1 pin (PC.13) is not connected to User push-button B1 (pin PA.00).
@par Keywords
System, RTC, Tamper, Reset, LSE, LSI
@par Directory contents
- RTC/RTC_Tamper_Init/Inc/stm32wlxx_it.h Interrupt handlers header file
- RTC/RTC_Tamper_Init/Inc/main.h Header for main.c module
- RTC/RTC_Tamper_Init/Inc/stm32_assert.h Template file to include assert_failed function
- RTC/RTC_Tamper_Init/Src/stm32wlxx_it.c Interrupt handlers
- RTC/RTC_Tamper_Init/Src/main.c Main program
- RTC/RTC_Tamper_Init/Src/system_stm32wlxx.c STM32WLxx system source file
@par Hardware and Software environment
- This example runs on STM32WL55JCIx devices.
- This example has been tested with NUCLEO-WL55JC RevC board and can be
easily tailored to any other supported device and development board.
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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