How to Erase STM32H7B3 internal Flash with HAL_Flash_Erase function

[DJean.3]

i see somewere that the way to erase the flash is to do this instructions.

FLASH_EraseInitTypeDef EraseInitStruct;

EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS; EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;

EraseInitStruct.Banks = FLASH_BANK_1;

EraseInitStruct.Sector = FirstSector;

EraseInitStruct.NbSectors = NbOfSectors;

HAL_FLASHEx_Erase(&EraseInitStruct, &SECTORError);

the matter is that i have STM32H7B3I-DK board with code that i genérate form STM32CubeMx. But when a write these instructions; the word "FLASH_VOLTAGE_RANGE_3" is unkown by the IDE (KEIL).

[RomainR.]

Hello DJean.3 (Community Member),

FLASH_VOLTAGE_RANGE_3 which is defined in STM32Cube_FW_H7_V1.11.0\Drivers\STM32H7xx_HAL_Driver\Inc\stm32h7xx_hal_flash_ex.h

Can you check if you include this file by uncomment:

#define HAL_FLASH_MODULE_ENABLED in stm32h7xx_hal_conf.h at line #49 ?

Can you try the following example project ?

\STM32Cube_FW_H7_V1.11.0\Projects\STM32H7B3I-DK\Examples\FLASH\FLASH_EraseProgram

Best regards,

Romain,

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[Tesla DeLorean]

Check the HAL conf file

Check the build target MCU, and defines passed to the compiler

Try find-in-files some of the constants / defines that do work

[Mike_ST · Accepted solution]

Hello,

If I'm correct,

In STM32H7 HAL, the FLASH_VOLTAGE_RANGE_X are conditionnal to the existence of the FLASH_CR_PSIZE bits in FLASH_CR1 register, which do not exist on the STM32H7B3, but does on H743/H753.

#if defined (FLASH_CR_PSIZE)

/** @defgroup FLASHEx_Voltage_Range FLASH Voltage Range

 * @{

 */

#define FLASH_VOLTAGE_RANGE_1       0x00000000U      /*!< Flash program/erase by 8 bits */

#define FLASH_VOLTAGE_RANGE_2       FLASH_CR_PSIZE_0 /*!< Flash program/erase by 16 bits */

#define FLASH_VOLTAGE_RANGE_3       FLASH_CR_PSIZE_1 /*!< Flash program/erase by 32 bits */

#define FLASH_VOLTAGE_RANGE_4       FLASH_CR_PSIZE   /*!< Flash program/erase by 64 bits */

/**

 * @}

 */

#endif /* FLASH_CR_PSIZE */

So I guess the VoltageRange field does not need to be filled on STM32H7B3.

Please have a look at the exemples available here:

https://www.st.com/en/embedded-software/stm32cubeh7.html

And check the project:

STM32Cube_FW_H7_V1.10.0\Projects\STM32H7B3I-DK\Examples\FLASH\FLASH_EraseProgram

[DJean.3]

Thanks Dear Mike

sorry for the late. it is correct that STM32H7B3 doesn't have the FLASH_CR_PSIZE bits in FLASH_CR1 register. and then FLASH_VOLTAGE_RANGE_X  are not defined.

i checked the project STM32Cube_FW_H7_V1.10.0\Projects\STM32H7B3I-DK\Examples\FLASH\FLASH_EraseProgram.

and the way to errase the STM32H7B3 flash is:

/*Variable used for Erase procedure*/

static FLASH_EraseInitTypeDef EraseInitStruct;

 /* Fill EraseInit structure*/

 EraseInitStruct.TypeErase   = FLASH_TYPEERASE_SECTORS;

 EraseInitStruct.Banks     = FLASH_BANK_1;

 EraseInitStruct.Sector    = FirstSector;

 EraseInitStruct.NbSectors   = NbOfSectors;

HAL_FLASHEx_Erase(&EraseInitStruct, &SECTORError);

Hope it will help someone who will face to same issue has me.