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MagicFly
MagicFly
Associate
March 5, 2019
Question

STM32F103 RDP Configure use HAL

  • March 5, 2019
  • 1 reply
  • 1006 views

my mcu is STM32F103RGT7.

​

I want to set RDP level to 1 in firmware.

Error occurs in HAL_FLASH_OB_Launch().​

Please tell me what to do.

The following sources have been used:

​

HAL_FLASHEx_OBGetConfig(&OptionsBytesStruct);

if( OptionsBytesStruct.RDPLevel != OB_RDP_LEVEL_1 )

{

/* Unlocks the option bytes block access */

HAL_FLASH_Unlock();

HAL_FLASH_OB_Unlock();

​

OptionsBytesStruct.RDPLevel = OB_RDP_LEVEL_1;

OptionsBytesStruct.OptionType = OPTIONBYTE_RDP;

if( HAL_FLASHEx_OBProgram(&OptionsBytesStruct) != HAL_OK )

{

DEBUG_PRINTF("RDP_WRITE Error\r\n");

/* Error occurred while options bytes programming. **********************/

while( 1 );

}

/* Launch the option byte loading */

HAL_FLASH_OB_Launch();

/* Locks the option bytes block access */

HAL_FLASH_OB_Lock();

HAL_FLASH_Lock();

}

​

This topic has been closed for replies.

1 reply

RKyzn.1
RKyzn.1
Associate
March 14, 2021

Hello.

I apologize for the google translation.

Digging into 

HAL_FLASH_OB_Launch (); // !!!!!! write OB to Flash and reset !!!!!

it will become visible

/ **
 
 \ brief System Reset
 
 \ details Initiates a system reset request to reset the MCU.
 
 * /
 
__NO_RETURN __STATIC_INLINE void __NVIC_SystemReset (void)
 
{
 
 __DSB (); / * Ensure all outstanding memory accesses included
 
 buffered write are completed before reset * /
 
 SCB-> AIRCR = (uint32_t) ((0x5FAUL << SCB_AIRCR_VECTKEY_Pos) |
 
 (SCB-> AIRCR & SCB_AIRCR_PRIGROUP_Msk) |
 
 SCB_AIRCR_SYSRESETREQ_Msk); / * Keep priority group unchanged * /
 
 __DSB (); / * Ensure completion of memory access * /
 
 
 
 for (;;) / * wait until reset * /
 
 {
 
 __NOP ();
 
 }
 
}

I think it is clear that the system deliberately hangs waiting for a reset.

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