/**
* @brief Set the read protection level.
* @param Level: specifies the read protection level.
* This parameter can be one of the following values:
* @arg OB_RDP_LEVEL_0: No protection
* @arg OB_RDP_LEVEL_1: Read protection of the memory
* @arg OB_RDP_LEVEL_2: Full chip protection
*
* @note WARNING: When enabling OB_RDP level 2 it's no more possible to go back to level 1 or 0
*
* @retval HAL Status
*/
static HAL_StatusTypeDef FLASH_OB_RDP_LevelConfig(uint8_t Level)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_OB_RDP_LEVEL(Level));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
if(status == HAL_OK)
{
*(__IO uint8_t*)OPTCR_BYTE1_ADDRESS = Level;
}
return status;
}
/**
* @brief Set the read protection level.
* @param ReadProtectLevel: specifies the read protection level.
* This parameter can be one of the following values:
* @arg OB_RDP_LEVEL_0: No protection
* @arg OB_RDP_LEVEL_1: Read protection of the memory
* @retval HAL status
*/
static HAL_StatusTypeDef FLASH_OB_RDP_LevelConfig(uint8_t ReadProtectLevel)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_OB_RDP_LEVEL(ReadProtectLevel));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
if(status == HAL_OK)
{
/* Clean the error context */
pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
/* If the previous operation is completed, proceed to erase the option bytes */
SET_BIT(FLASH->CR, FLASH_CR_OPTER);
SET_BIT(FLASH->CR, FLASH_CR_STRT);
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
/* If the erase operation is completed, disable the OPTER Bit */
CLEAR_BIT(FLASH->CR, FLASH_CR_OPTER);
if(status == HAL_OK)
{
/* Enable the Option Bytes Programming operation */
SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
WRITE_REG(OB->RDP, ReadProtectLevel);
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
/* if the program operation is completed, disable the OPTPG Bit */
CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
}
}
return status;
}
/**
* @brief Set the read protection level.
*
* @note To configure the RDP level, the option lock bit OPTLOCK must be
* cleared with the call of the HAL_FLASH_OB_Unlock() function.
* @note To validate the RDP level, the option bytes must be reloaded
* through the call of the HAL_FLASH_OB_Launch() function.
* @note !!! Warning : When enabling OB_RDP level 2 it's no more possible
* to go back to level 1 or 0 !!!
*
* @param RDPLevel specifies the read protection level.
* This parameter can be one of the following values:
* @arg OB_RDP_LEVEL_0: No protection
* @arg OB_RDP_LEVEL_1: Read protection of the memory
* @arg OB_RDP_LEVEL_2: Full chip protection
*
* @retval HAL status
*/
static HAL_StatusTypeDef FLASH_OB_RDPConfig(uint32_t RDPLevel)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_OB_RDP_LEVEL(RDPLevel));
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE, FLASH_BANK_1);
status |= FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE, FLASH_BANK_2);
if(status == HAL_OK)
{
/* Configure the RDP level in the option bytes register */
MODIFY_REG(FLASH->OPTSR_PRG, FLASH_OPTSR_RDP, RDPLevel);
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE, FLASH_BANK_1);
status |= FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE, FLASH_BANK_2);
}
return status;
}
