STM32L15xx microcontroller can internal FLASH Read Protection be enabled inside flashed SW?

[DLyum.1]

Hi,

My project is based on STM32L15xx microcontroller. I know, that internal FLASH Read Protection may be enabled during programming an image by STMFlashLoader with --erp option. My question is: can I compile my image with internal FLASH read protection enabled by some tweak so that I don't have to use "--erp" option on downloading my image to the target?

Thanks in advance!

[Tesla DeLorean]

Should be able to check the state of the option bytes, and change them.​

[DLyum.1]

Thank you!

The Option Bytes are described in PM0062 (Flash and EEPROM Programming Manual) application notes.

[FBL · Accepted solution]

Hello @DLyum.1​ ,

You need to Unlock the Flash and OB to enable the flash control register access.

Here is an example:

FLASH_OBProgramInitTypeDef obProgram = { 0 };

obProgram.OPTIONBYTE_RDP = OB_RDP_LEVEL_1;

FLASH_OB_RDPConfig

HAL_FLASHEx_OBGetConfig(&obProgram);

...

if (obProgram.RDPLevel == OB_RDP_LEVEL_1)

...

The function FLASH_OB_RDPConfig(); could be used.

Hope this helps!

[DLyum.1]

Thank you!