STM32H750IB How set the RDP Level ?

[JFieb.1]

When I set the RDP Level 1 the Controller stops working.

I must unpower the Controller and power it agin, NRST didn't work.

I use the code:

       HAL_FLASH_Unlock();

       HAL_FLASH_OB_Unlock();

       OBIni.OptionType = OPTIONBYTE_RDP;

       OBIni.RDPLevel = OB_RDP_LEVEL_1;

       if ( HAL_FLASHEx_OBProgram(&OBIni) != HAL_OK )

       {

          HAL_FLASH_OB_Lock();

          HAL_FLASH_Lock();

          return;

       }

       HAL_FLASH_OB_Launch();

       /* We should not make it past the Launch, so lock

        * flash memory and return an error from function

        */

       HAL_FLASH_OB_Lock();

       HAL_FLASH_Lock();          

What must I do, that the controller didnt stop after the HAL_FLASH_OB_Launch(); ?

[FBL]

Hello @Jürgen Fiebig​,

Check this article How to program STM32 Option Bytes with the HAL API 2. Setting RDP Level

Note:  HAL_FLASH_OB_Launch(); is called to generate System Reset to load the new option byte values.