有时候有、有时候没有问题，那就是有问题的时候没有正常写入，最好在软件里写入之后再读回判断一下有没有写对了
或者直接用库函数代替你那个操作
/**
* [url=home.php?mod=space&uid=247401]@brief[/url] Programs option byte
* @param Address : option byte address to program
* @param Data : Value to write
* @retval None
*/
void FLASH_ProgramOptionByte(uint16_t Address, uint8_t Data)
{
/* Check parameter */
assert_param(IS_OPTION_BYTE_ADDRESS_OK(Address));
/* Enable write access to option bytes */
FLASH->CR2 |= FLASH_CR2_OPT;
FLASH->NCR2 &= (uint8_t)(~FLASH_NCR2_NOPT);
/* check if the option byte to program is ROP*/
if (Address == 0x4800)
{
/* Program option byte*/
*((NEAR uint8_t*)Address) = Data;
}
else
{
/* Program option byte and his complement */
*((NEAR uint8_t*)Address) = Data;
*((NEAR uint8_t*)((uint16_t)(Address + 1))) = (uint8_t)(~Data);
}
FLASH_WaitForLastOperation(FLASH_MEMTYPE_PROG);
/* Disable write access to option bytes */
FLASH->CR2 &= (uint8_t)(~FLASH_CR2_OPT);
FLASH->NCR2 |= FLASH_NCR2_NOPT;
}
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