Peripheral Control functions

Management functions. More...

Functions
HAL_StatusTypeDef	HAL_FLASH_Unlock (void)
	Unlock the FLASH control register access. More...
HAL_StatusTypeDef	HAL_FLASH_Lock (void)
	Lock the FLASH control register access. More...
HAL_StatusTypeDef	HAL_FLASH_OB_Unlock (void)
	Unlock the FLASH Option Bytes Registers access. More...
HAL_StatusTypeDef	HAL_FLASH_OB_Lock (void)
	Lock the FLASH Option Bytes Registers access. More...
HAL_StatusTypeDef	HAL_FLASH_OB_Launch (void)
	Launch the option byte loading. More...

Detailed Description

Management functions.

 ===============================================================================
                      ##### Peripheral Control functions #####
 ===============================================================================
    [..]
    This subsection provides a set of functions allowing to control the FLASH
    memory operations.

Function Documentation

HAL_FLASH_Lock()

HAL_StatusTypeDef HAL_FLASH_Lock

(

void

)

Lock the FLASH control register access.

Return values

HAL

Status

Definition at line 531 of file stm32l4xx_hal_flash.c.

{
  /* Set the LOCK Bit to lock the FLASH Registers access */
  SET_BIT(FLASH->CR, FLASH_CR_LOCK);

  return HAL_OK;
}

HAL_FLASH_OB_Launch()

HAL_StatusTypeDef HAL_FLASH_OB_Launch

(

void

)

Launch the option byte loading.

Return values

HAL

Status

Definition at line 575 of file stm32l4xx_hal_flash.c.

{
  /* Set the bit to force the option byte reloading */
  SET_BIT(FLASH->CR, FLASH_CR_OBL_LAUNCH);

  /* Wait for last operation to be completed */
  return(FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE));
}

HAL_FLASH_OB_Lock()

HAL_StatusTypeDef HAL_FLASH_OB_Lock

(

void

)

Lock the FLASH Option Bytes Registers access.

Return values

HAL

Status

Definition at line 563 of file stm32l4xx_hal_flash.c.

{
  /* Set the OPTLOCK Bit to lock the FLASH Option Byte Registers access */
  SET_BIT(FLASH->CR, FLASH_CR_OPTLOCK);

  return HAL_OK;
}

HAL_FLASH_OB_Unlock()

HAL_StatusTypeDef HAL_FLASH_OB_Unlock

(

void

)

Unlock the FLASH Option Bytes Registers access.

Return values

HAL

Status

Definition at line 543 of file stm32l4xx_hal_flash.c.

{
  if(READ_BIT(FLASH->CR, FLASH_CR_OPTLOCK) != 0U)
  {
    /* Authorizes the Option Byte register programming */
    WRITE_REG(FLASH->OPTKEYR, FLASH_OPTKEY1);
    WRITE_REG(FLASH->OPTKEYR, FLASH_OPTKEY2);
  }
  else
  {
    return HAL_ERROR;
  }

  return HAL_OK;
}

HAL_FLASH_Unlock()

HAL_StatusTypeDef HAL_FLASH_Unlock

(

void

)

Unlock the FLASH control register access.

Return values

HAL

Status

Definition at line 507 of file stm32l4xx_hal_flash.c.

{
  HAL_StatusTypeDef status = HAL_OK;

  if(READ_BIT(FLASH->CR, FLASH_CR_LOCK) != 0U)
  {
    /* Authorize the FLASH Registers access */
    WRITE_REG(FLASH->KEYR, FLASH_KEY1);
    WRITE_REG(FLASH->KEYR, FLASH_KEY2);

    /* Verify Flash is unlocked */
    if(READ_BIT(FLASH->CR, FLASH_CR_LOCK) != 0U)
    {
      status = HAL_ERROR;
    }
  }

  return status;
}