Hello,
Havent tried changing the BOR on the Nucleo board we have. I did not want to try this because I was afraid of "bricking" the Nucleo board. Guess there is no other choice than to try this.
regarding the code here is the code intructions being used:
int main(void)
{
// Use this to enable SWV printf
// Enable TRCENA
DEMCR |= ( 1 << 24);
// Enable stimulus port 0
ITM_TRACE_EN |= ( 1 << 0);
/* set example to const : this const changes in binary without rebuild */
pUserAppId = (uint8_t *)&UserAppId;
/* Initialize Clock, DMA, and peripherals only configured in HAL modules */
Board_Init();
/* Initialize peripherals shared between HAL and custom modules-----------*/
MX_USART1_UART_Init();
//>>>>>>>>>>>>> Here is the Ooption Bytes change code
/*
FLASH_OBProgramInitTypeDef OptionBytes;
HAL_FLASHEx_OBGetConfig(&OptionBytes);
printf("BOR LEVEL = 0x%04X", OptionBytes.BORLevel);
printf("Option Bytes = 0x%04X", OptionBytes.USERConfig);
printf("BOR_LEV = 0x%X", (unsigned int)(OptionBytes.USERConfig & OB_USER_BOR_LEV));
if ((OptionBytes.USERConfig & OB_USER_BOR_LEV) != OB_BOR_LEVEL3)
{
printf("Brown out reset not set to Level 5 (approximately 2.9V)");
HAL_FLASH_Unlock();
HAL_FLASH_OB_Unlock();
OptionBytes.OptionType = OPTIONBYTE_USER;
OptionBytes.USERConfig = OB_BOR_LEVEL5;
if (HAL_FLASHEx_OBProgram(&OptionBytes) != HAL_OK)
{
HAL_FLASH_OB_Lock();
HAL_FLASH_Lock();
return HAL_ERROR;
}
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();
}
printf("BOR LEVEL after = 0x%04X", OptionBytes.BORLevel);
printf("Option Bytes = 0x%04X", OptionBytes.USERConfig);
*/
//<<<<<<<<<
while(1)
{
userApp();
}
}
I think I took the code from this site
Also there are other st users with the same problem and no solutions
Here and here
I tried holding BOOT0 high during reset with no results.
