Problem for perform a switch bank on STM32U385Rg

[Sixela]

Hello all,

I allow to send this message after a long attempt to perform a switch bank on my STM32U385RG.

This is part of my code:

/*--------------------------------------------------------*/
void OptionBytes_SwapBanks(void)
/*--------------------------------------------------------*/
{
 FLASH_OBProgramInitTypeDef OBInit;
 HAL_StatusTypeDef status;

 swo_printf("Current USERConfig: 0x%08lx\n", OBInit.USERConfig);

 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPERR | FLASH_FLAG_PROGERR | FLASH_FLAG_WRPERR |
 FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR | FLASH_FLAG_PGSERR |
 FLASH_FLAG_OPTWERR);
 uint32_t optr = FLASH->OPTR;

 if (optr & FLASH_OPTR_DUALBANK)
 {
 swo_printf("Dual Bank is ENABLED\n");
 }
 else
 {
 swo_printf("Dual Bank is DISABLED\n");
 }

 if (optr & FLASH_OPTR_SWAP_BANK)
 {
 	 swo_printf("Swap Bank is ENABLED\n");
	OBInit.OptionType = OPTIONBYTE_USER;
 OBInit.USERType = OB_USER_SWAP_BANK;
 OBInit.USERConfig = OB_SWAP_BANK_DISABLE;
 }
 else
 {
 	 swo_printf("Swap Bank is DISABLED\n");
	OBInit.OptionType = OPTIONBYTE_USER;
 	OBInit.USERType = OB_USER_SWAP_BANK;;
 	OBInit.USERConfig = OB_SWAP_BANK_ENABLE;
 }
 status = HAL_FLASHEx_OBProgram(&OBInit);
 if (status != HAL_OK)
 {
 swo_printf("Error in programming Option Bytes: %ld\n", HAL_FLASH_GetError());
 HAL_FLASH_OB_Lock();
 HAL_FLASH_Lock();
 return;
 }
}

You can view some logs in attached files:

           

I can do the swap directly with STMCubeprogrammer but I cannot do it with code so i suppose that it's an error of configuration or code.

[TDK]

Do you have CPU_IN_SECURE_STATE defined? My guess is something with that.

[Sixela]

i don't know how i can active or deactivate the CPU_IN_SECURE_STATE .
I had already deactivate all OptionBytes for security (TZEN,WRP,...) and i don't use the MPU actually

[KDJEM.1]

Hello @Sixela and welcome to the community;

 

I recommend you to refer to FLASH_SwapBanks example and check your code. This example presents a guide through the configuration steps to program internal Flash memory bank 1 and bank 2, and to swap between both of them by mean of the FLASH HAL API. This example has been tested with NUCLEO-U385RG-Q board. Also, I advise you to look at the README.md to run this example.

 

Thank you.

Kaouthar

Latest commit

 

 

 

[Sixela]

Hello,

I have already converted the code from the example into a unified code, but it's not working either.
I think there may be something interfering with the exchange.

I don't know why perforrm the swapping is impossible for this one.