Hi Experts,
I'm almost a newbie at STM32F7xx even though I've been working with STM32F4 series.
I wanted to handle the flash memory as IAP.
I tried flash erase as same as what I do on STM32F4 but it failed.
So I checked and found that thera are two kind of bank modes in STM32F7.
I'm familiar with the address map of single bank mode and I tried to change Dual bank mode to Single bank mode in my code like below.
FLASH_OBProgramInitTypeDef OBInit = {0};
// 1. Unlock Flash and Option Bytes
HAL_FLASH_Unlock();
HAL_FLASH_OB_Unlock();
// 2. Read current Option Bytes
HAL_FLASHEx_OBGetConfig(&OBInit);
// 3. Set DBANK to 0 (Single Bank)
OBInit.OptionType = OPTIONBYTE_USER;
OBInit.USERConfig = OB_NDBANK_SINGLE_BANK;
if (HAL_FLASHEx_OBProgram(&OBInit) != HAL_OK)
{
// Error handling
HAL_FLASH_OB_Lock();
HAL_FLASH_Lock();
return;
}
// 4. Launch Option Bytes loading (MCU will reset)
HAL_FLASH_OB_Launch();
// 5. Lock Option Bytes and Flash
HAL_FLASH_OB_Lock();
HAL_FLASH_Lock();
When I did it, system has halted and I can't make it reboot any more.
With STM32CureProgrammer, I can connect to the STM32F746NG Discovery board and programm again but MCU doesn't run at all.
I asked chatgpt about this but its answer was not helpful for me.
Please help me.
Thank you.
Best regards,
James.
