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