Failing to flash a new program after writing to memory -- STM32F439 microcontroller

[themarcman]

Hello everyone, I am running into the following problem when reprogramming after a write to flash memory.

I am unable to reprogram the microcontroller after writing to flash memory.

In my program I write to bank 2 ( address 0x08100000 ) of the microcontroller using:

HAL_FLASH_Unlock();


EraseInitStruct.TypeErase = TYPEERASE_SECTORS;
EraseInitStruct.Sector = FLASH_SECTOR_12;
EraseInitStruct.NbSectors = 2;
EraseInitStruct.VoltageRange = VOLTAGE_RANGE_3;

HAL_FLASHEx_Erase(&EraseInitStruct, &flash_error_information);



while(update->start_address + update->current_byte_num != update->end_address)
{
HAL_FLASH_Program( FLASH_TYPEPROGRAM_BYTE, update->start_address + update->current_byte_num, update->data_to_write_in_flash[ update->current_byte_num ]);
update->current_byte_num++;
}

HAL_FLASH_Lock();

After running the program and attempting to flash another program, I then get the following error on a message box:

Error message from debugger back end:

Error finishing flash operation

The console returns the following:

Error: ST-LINK error (DEV_TARGET_NOT_HALTED)
Encountered Error when opening C:\ST\STM32CubeIDE_1.12.0\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.win32_2.0.600.202301161003\tools\bin\STM32_Programmer_CLI.exe
Error in STM32CubeProgrammer

The only solution I have found is adding a delay such as HAL_Delay(250); after unlocking the flash memory, but this is far from a permanent solution.

Any help would be greatly apreciated.

[rk8266882]

Hi , Iam also facing the same issue, did you found any solution..?

[Tesla DeLorean]

Is the code you put in the second bank bad, partial, corrupt?

The System Loader will try to identify second-bank code at 0x08100000

Does behaviour change if you put it deeper ? say 0x08110000 ?

Can you access the device with BOOT0 = HIGH ?