AnsweredAssumed Answered

Read-while-write (RWW) feature on the STM32F427IG doesn't work

Question asked by Henry Brasil on Jan 17, 2018
Latest reply on Jan 18, 2018 by Henry Brasil

Hello, I am using the STM32F427IG with 1MB of flash with the following configuration:

DB1M(dual bank mode) option byte ON

BFB2(run from bank2) option byte OFF


Looks like that when I write to the BANK2 with the following function the dual bank mode RWW(read while write) doesn't work, as the LED toggle inside the systick functions stop until the erase of some banks is over.

Where I am wrong ? I am running the code from the BANK1


I erase with the following function:

void eraseBank2Sectors{

  FLASH_EraseInitTypeDef EraseInitStruct;
  EraseInitStruct.TypeErase = TYPEERASE_SECTORS;
  EraseInitStruct.VoltageRange = VOLTAGE_RANGE_3;
  EraseInitStruct.Sector = FLASH_SECTOR_17;
  EraseInitStruct.NbSectors = 3;
  APP_Printf("BTL: FLASH erasing on bank2 sector 17,18,19...\n");
  if (HAL_FLASHEx_Erase_IT(&EraseInitStruct) != HAL_OK){
  APP_Printf("BTL: FLASH erase on bank2 FAIL \n");


and the systick handler as the following:

void SysTick_Handler(void)