Example description
FLASH_Program
Example Description
This example provides a description of how to program the STM32F10x FLASH.
After Reset, the Flash memory Program/Erase Controller is locked. To unlock it,
the FLASH_Unlock function is used.
Before programming the desired addresses, an erase operation is performed using
the flash erase page feature. The erase procedure starts with the calculation of
the number of pages to be used. Then all these pages will be erased one by one by
calling FLASH_ErasePage function.
Once this operation is finished, the programming operation will be performed by
using the FLASH_ProgramWord function. The written data is then checked and the
result of the programming operation is stored into the MemoryProgramStatus variable.
Directory contents
- FLASH/Program/stm32f10x_conf.h Library Configuration file
- FLASH/Program/stm32f10x_it.h Interrupt handlers header file
- FLASH/Program/stm32f10x_it.c Interrupt handlers
- FLASH/Program/main.c Main program
Hardware and Software environment
- This example runs on STM32F10x Connectivity line, High-Density, Medium-Density
and Low-Density Devices.
- This example has been tested with STMicroelectronics STM3210C-EVAL (STM32F10x
Connectivity line), STM3210E-EVAL (STM32F10x High-Density) and STM3210B-EVAL
(STM32F10x Medium-Density) evaluation boards and can be easily tailored to
any other supported device and development board.
How to use it ?
In order to make the program work, you must do the following:
- Create a project and setup all project configuration
- Add the required Library files:
- stm32F10x_flash.c
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- Edit stm32f10x.h file to select the device you are working on.
Tip: You can tailor the provided project template to run this example, for
more details please refer to "stm32f10x_stdperiph_lib_um.chm" user
manual; select "Peripheral Examples" then follow the instructions
provided in "How to proceed" section.
- Link all compiled files and load your image into target memory
- Run the example
note
- Low-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 16 and 32 Kbytes.
- Medium-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 32 and 128 Kbytes.
- High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
- Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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FLASH_Write_Protection
Example Description
This example provides a description of how to enable and disable the write protection
for the STM32F10x FLASH:
- Enable Write protection:
To enable the Write Protection, uncomment the line "#define WriteProtection_Enable"
in main.c file.
To protect a set of pages, the user has to call the function FLASH_EnableWriteProtection.
The parameter of this function will define the number of pages to be protected.
To load the new option byte values, a system Reset is necessary, for this, the
function NVIC_SystemReset() is used.
- Disable Write protection:
To disable the Write Protection, uncomment the line "#define WriteProtection_Disable"
in main.c file.
To disable the write protection of the STM32F10x Flash, an erase of the Option
Bytes is necessary. This operation is done by the function FLASH_EraseOptionBytes.
To load the new option byte values, a system Reset is necessary, for this, the
function NVIC_SystemReset() is used.
If the desired pages are not write protected, an erase and a write operation are
performed.
Directory contents
- FLASH/Write_Protection/stm32f10x_conf.h Library Configuration file
- FLASH/Write_Protection/stm32f10x_it.h Interrupt handlers header file
- FLASH/Write_Protection/stm32f10x_it.c Interrupt handlers
- FLASH/Write_Protection/main.c Main program
Hardware and Software environment
- This example runs on STM32F10x Connectivity line, High-Density, Medium-Density
and Low-Density Devices.
- This example has been tested with STMicroelectronics STM3210C-EVAL (STM32F10x
Connectivity line), STM3210E-EVAL (STM32F10x High-Density) and STM3210B-EVAL
(STM32F10x Medium-Density) evaluation boards and can be easily tailored to
any other supported device and development board.
How to use it ?
In order to make the program work, you must do the following:
- Create a project and setup all project configuration
- Add the required Library files:
- stm32F10x_flash.c
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- Edit stm32f10x.h file to select the device you are working on.
Tip: You can tailor the provided project template to run this example, for
more details please refer to "stm32f10x_stdperiph_lib_um.chm" user
manual; select "Peripheral Examples" then follow the instructions
provided in "How to proceed" section.
- Link all compiled files and load your image into target memory
- Run the example
note
- Low-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 16 and 32 Kbytes.
- Medium-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 32 and 128 Kbytes.
- High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
- Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.