Posted on February 07, 2018 at 10:24Hello ,
i have trouble changing the Option Bytes BOR LEVEL in my project with a STM32L031K6T7 micro :
I am Using KEIL ARM V5 together with a PEMICRO CYCLONE UNIVERSAL Programming Device:
The Sequence i am using in my main init function is the following :
void OptionByteProg(uint8_t index, uint16_t data);
__INLINE __attribute__ ((section ('.ramcode'))) void OptionByteProg(uint8_t index, uint16_t data)
{
FLASH->PEKEYR = 0x89ABCDEF;
FLASH->PEKEYR = 0x02030405;
FLASH->PRGKEYR = 0x8C9DAEBF;
FLASH->PRGKEYR = 0x13141516;
FLASH->OPTKEYR = 0xFBEAD9C8;
FLASH->OPTKEYR = 0x24252627;
/* ?16Bit???,?16Bit???,?????. */
*(__IO uint32_t *)(OB_BASE + index * 4) = (uint32_t)((~data << 16) | data);
while(FLASH->SR & FLASH_SR_BSY);
}
At Adressing the OB_BASE Setting the debugger is generating a hard fault. Why does this happen ?
OB_BASE is declared the following:
#define OB_BASE ((uint32_t)0x1FF80000U) /*!< FLASH Option Bytes base address */
Many thanks and greetings
