/**
@page FLASH_WriteProtection FLASH write protection
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file FLASH/FLASH_WriteProtection/readme.txt
* @author MCD Application Team
* @brief Description of the FLASH write protection example.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@endverbatim
@par Example Description
This example describes how to configure and use the FLASH HAL API to enable and
disable the write protection of the internal Flash memory.
At the beginning of the main program the HAL_Init() function is called to
reset all the peripherals, initialize the Flash interface and the systick.
Then the SystemClock_Config() function is used to configure the system clock (SYSCLK)
to run at 100 MHz.
Each time the Joystick sel-button is pressed, the program will check the
write protection status of FLASH_WRP_SECTORS (defined in main.c)
- If FLASH_WRP_SECTORS are write protected, the write protection will be
disabled.
Then the following message will be displayed on LCD, if protection disable
operation is done correctly:
"Write protection is disabled"
Otherwise the following message will be displayed on LCD:
"Write protection is not disabled"
- If FLASH_WRP_SECTORS are not write protected, the write protection will
be enabled.
Then the following message will be displayed on LCD, if protection enable
operation is done correctly:
"Write protection is enabled"
Otherwise the following message will be displayed on LCD:
"Write protection is not enabled"
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application need to ensure that the SysTick time base is always set
to 1 millisecond to have correct HAL operation.
@par Keywords
Memory, Flash, Write protection, Sector, Program, Erase
@par Directory contents
- FLASH/FLASH_WriteProtection/Inc/stm32f4xx_hal_conf.h HAL Configuration file
- FLASH/FLASH_WriteProtection/Inc/stm32f4xx_it.h Header for stm32f4xx_it.c
- FLASH/FLASH_WriteProtection/Inc/main.h Header for main.c module
- FLASH/FLASH_WriteProtection/Src/stm32f4xx_it.c Interrupt handlers
- FLASH/FLASH_WriteProtection/Src/main.c Main program
- FLASH/FLASH_WriteProtection/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
@par Hardware and Software environment
- This example runs on STM32F412xG devices.
- This example has been tested with STM32412G-DISCOVERY 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
*/
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