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90 lines
4.0 KiB
Plaintext
90 lines
4.0 KiB
Plaintext
/**
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@page FLASH_WriteProtection FLASH write protection
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file FLASH/FLASH_WriteProtection/readme.txt
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* @author MCD Application Team
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* @brief Description of the FLASH write protection example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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This example describes how to configure and use the FLASH HAL API to enable and
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disable the write protection of the internal Flash memory.
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At the beginning of the main program the HAL_Init() function is called to
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reset all the peripherals, initialize the Flash interface and the systick.
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Then the SystemClock_Config() function is used to configure the system clock (SYSCLK)
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to run at 180 MHz.
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Each time the Tamper push-button is pressed, the program will check the
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write protection status of FLASH_WRP_SECTORS (defined in main.c)
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- If FLASH_WRP_SECTORS are write protected, the write protection will be
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disabled.
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Then the following message will be displayed on LCD, if protection disable
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operation is done correctly:
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"Write protection is disabled"
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Otherwise the following message will be displayed on LCD:
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"Write protection is not disabled"
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- If FLASH_WRP_SECTORS are not write protected, the write protection will
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be enabled.
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Then the following message will be displayed on LCD, if protection enable
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operation is done correctly:
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"Write protection is enabled"
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Otherwise the following message will be displayed on LCD:
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"Write protection is not enabled"
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application need to ensure that the SysTick time base is always set
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to 1 millisecond to have correct HAL operation.
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@note The connection of the LCD reset pin to a dedicated GPIO PK7 instead of the STM32F469 NRST pin may cause residual display on LCD with applications/examples that do not require display.
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The LCD clear can be ensured by hardware through the boards power off/power on or by software calling the BSP_LCD_Reset() function.
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@par Keywords
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Memory, Flash, Write protection, Sector, Program, Erase
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@par Directory contents
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- FLASH/FLASH_WriteProtection/Inc/stm32f4xx_hal_conf.h HAL Configuration file
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- FLASH/FLASH_WriteProtection/Inc/stm32f4xx_it.h Header for stm32f4xx_it.c
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- FLASH/FLASH_WriteProtection/Inc/main.h Header for main.c module
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- FLASH/FLASH_WriteProtection/Src/stm32f4xx_it.c Interrupt handlers
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- FLASH/FLASH_WriteProtection/Src/main.c Main program
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- FLASH/FLASH_WriteProtection/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F469xx/STM32F479xx devices.
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- This example has been tested and validated with STMicroelectronics STM32469I-EVAL 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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*/
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