STM32L4S5 write data to 2MB flash memory (STM32CubeIDE)

[larsandre]

I am trying to write to the flash memory of the STM32L4S5QIIX microcontroller on the EVAL-ADIN1110EBZ development board. I have also tried similar code on an STM32L4S5VITX microcontroller on a custom circuit board.

Short example code:

uint32_t flash_memory_address = 0x08100000;
uint64_t flash_write_data = 0x12345678;
uint8_t flash_read_data[4]= {0};

HAL_FLASH_Unlock();
FLASH_PageErase(0, FLASH_BANK_2);
HAL_FLASH_Lock();

HAL_FLASH_Unlock();
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_ALL_ERRORS);
HAL_StatusTypeDef status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD,
                                             flash_memory_address, 
                                             flash_write_data);
HAL_FLASH_Lock();

The full code and project files can be found at: https://github.com/landas/stm32l4s5-flash-memory/blob/e8304c3d17e27ee9f27f8a8243ceb7f73ba077bf/Core/Src/main.c#L135

FLASH_PageErase(0, FLASH_BANK_2) operation was completed successfully. This was verified by using STM32CubeProgrammer to write to the flash memory and confirm the changes in the specified memory area.

HAL_FLASH_Program(...) returns the error codes:

• HAL_FLASH_ERROR_PGA
• HAL_FLASH_ERROR_PGS

I get similar code to work with a NUCLEO-F303RE develpoement board without any errors.

I would appreciate any hints on how to resolve this issue.

Note: I have tried the same code without 

HAL_FLASH_Lock();
HAL_FLASH_Unlock();

between erase and program.