最近用到要在STM32F103VBT6程序中使用HAL库加入FLASH读保护功能，网上找了一下多多少少都有点问题
最后奉献已验证代码

/****************************************************************
* Function:    Flash_EnableReadProtection
* Description: Enable the read protection of user flash area.
* Input:        NONE
* Output:        NONE
* Return:  NONE
*****************************************************************/

void Flash_EnableReadProtection(void)
{

  FLASH_OBProgramInitTypeDef OBInit;
  
  __HAL_FLASH_PREFETCH_BUFFER_DISABLE();
  
  HAL_FLASHEx_OBGetConfig(&OBInit);
  if(OBInit.RDPLevel == OB_RDP_LEVEL_0)
  {
    OBInit.OptionType = OPTIONBYTE_RDP;
    OBInit.RDPLevel = OB_RDP_LEVEL_1;
    HAL_FLASH_Unlock();
    HAL_FLASH_OB_Unlock();
    HAL_FLASHEx_OBProgram(&OBInit);
    HAL_FLASH_OB_Lock();
    HAL_FLASH_Lock();
  }
  __HAL_FLASH_PREFETCH_BUFFER_ENABLE();

}

/****************************************************************
* Function:    Flash_DisableReadProtection
* Description: Disable the read protection of user flash area.
* Input:        NONE
* Output:        NONE
* Return:  NONE
*****************************************************************/
void Flash_DisableReadProtection(void)
{

  FLASH_OBProgramInitTypeDef OBInit;
  
  __HAL_FLASH_PREFETCH_BUFFER_DISABLE();
  
  HAL_FLASHEx_OBGetConfig(&OBInit);
  if(OBInit.RDPLevel == OB_RDP_LEVEL_0)
  {
    OBInit.OptionType = OPTIONBYTE_RDP;
    OBInit.RDPLevel = OB_RDP_LEVEL_1;
    HAL_FLASH_Unlock();
    HAL_FLASH_OB_Unlock();
    HAL_FLASHEx_OBProgram(&OBInit);
    HAL_FLASH_OB_Lock();
    HAL_FLASH_Lock();
  }
  __HAL_FLASH_PREFETCH_BUFFER_ENABLE();

}