/**
@page FLASH_EraseProgram FLASH Erase and Program example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file FLASH/FLASH_EraseProgram/readme.txt
* @author MCD Application Team
* @brief Description of the FLASH Erase and Program 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 erase and program
the internal Flash memory.
This example guides you through the different configuration steps by mean of HAL API
how to erase and program the STM32F4xx internal Flash memory mounted on
STM32F429I-Discovery RevC board.
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 180 MHz.
After Reset, the Flash memory Program/Erase Controller is locked. A dedicated function
is used to enable the FLASH control register access.
Before programming the desired addresses, an erase operation is performed using
the flash erase sector feature. The erase procedure is done by filling the erase init
structure giving the starting erase sector and the number of sectors to erase.
At this stage, all these sectors will be erased one by one separately.
@note: if problem occurs on a sector, erase will be stopped and faulty sector will
be returned to user (through variable 'SectorError').
Once this operation is finished, sector word programming operation will be performed
in the Flash memory. The written data is then read back and checked.
STM32F429I-DISCO board's LEDs can be used to monitor the transfer status:
- LED3 is ON when there are no errors detected after data programming
- LED4 is ON when there are errors detected after data programming
- LED3/LED4 are ON when there is an issue during erase or program procedure
@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 needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@par Keywords
Memory, FLASH, Erase, Program, Sector, Mass Erase
@par Directory contents
- FLASH/FLASH_EraseProgram/Inc/stm32f4xx_hal_conf.h Library Configuration file
- FLASH/FLASH_EraseProgram/Inc/stm32f4xx_it.h Interrupt handlers header file
- FLASH/FLASH_EraseProgram/Inc/main.h Main program header file
- FLASH/FLASH_EraseProgram/Src/stm32f4xx_it.c Interrupt handlers
- FLASH/FLASH_EraseProgram/Src/main.c Main program
- FLASH/FLASH_EraseProgram/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
@par Hardware and Software environment
- This example runs on STM32F429xx devices.
- This example has been tested with STMicroelectronics STM32F429I-Discovery RevC
boards 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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