Initialization and Configuration Functions. More...

Functions
HAL_StatusTypeDef	HAL_FIREWALL_Config (FIREWALL_InitTypeDef *fw_init)
	Initialize the Firewall according to the FIREWALL_InitTypeDef structure parameters.
void	HAL_FIREWALL_GetConfig (FIREWALL_InitTypeDef *fw_config)
	Retrieve the Firewall configuration.
void	HAL_FIREWALL_EnableFirewall (void)
	Enable FIREWALL.
void	HAL_FIREWALL_EnablePreArmFlag (void)
	Enable FIREWALL pre arm.
void	HAL_FIREWALL_DisablePreArmFlag (void)
	Disable FIREWALL pre arm.

Detailed Description

Initialization and Configuration Functions.

===============================================================================
            ##### Initialization and Configuration functions #####
 ===============================================================================
    [..]
    This subsection provides the functions allowing to initialize the Firewall.
    Initialization is done by HAL_FIREWALL_Config():

      (+) Enable the Firewall clock thru __HAL_RCC_FIREWALL_CLK_ENABLE() macro.

      (+) Set the protected code segment address start and length.

      (+) Set the protected non-volatile and/or volatile data segments
          address starts and lengths if applicable.

      (+) Set the volatile data segment execution and sharing status.

      (+) Length must be set to 0 for an unprotected segment.

Function Documentation

HAL_StatusTypeDef HAL_FIREWALL_Config ( FIREWALL_InitTypeDef * fw_init )

Initialize the Firewall according to the FIREWALL_InitTypeDef structure parameters.

Parameters:

fw_init,: Firewall initialization structure

Note:: The API returns HAL_ERROR if the Firewall is already enabled.

Return values:

HAL status

Definition at line 102 of file stm32l4xx_hal_firewall.c.

void HAL_FIREWALL_DisablePreArmFlag ( void )

Disable FIREWALL pre arm.

Note:: When FPA bit is reset, any code executed outside the protected segment when the Firewall is opened will generate a system reset.; This API provides the same service as __HAL_FIREWALL_PREARM_DISABLE() macro but can't be executed inside a code area protected by the Firewall.; When the Firewall is disabled, user can resort to HAL_FIREWALL_EnablePreArmFlag() API any time.; When the Firewall is enabled and NVDSL register is equal to 0 (that is, when the non volatile data segment is not defined), ** this API can be executed when the Firewall is closed ** when the Firewall is opened, user should resort to __HAL_FIREWALL_PREARM_DISABLE() macro instead; When the Firewall is enabled and NVDSL register is different from 0 (that is, when the non volatile data segment is defined) ** FW_CR register can be accessed only when the Firewall is opened: user should resort to __HAL_FIREWALL_PREARM_DISABLE() macro instead.

Return values:

None

Definition at line 271 of file stm32l4xx_hal_firewall.c.

void HAL_FIREWALL_EnableFirewall ( void )

Enable FIREWALL.

Note:: Firewall is enabled in clearing FWDIS bit of SYSCFG CFGR1 register. Once enabled, the Firewall cannot be disabled by software. Only a system reset can set again FWDIS bit.

Return values:

None

Definition at line 220 of file stm32l4xx_hal_firewall.c.

void HAL_FIREWALL_EnablePreArmFlag ( void )

Enable FIREWALL pre arm.

Note:: When FPA bit is set, any code executed outside the protected segment will close the Firewall.; This API provides the same service as __HAL_FIREWALL_PREARM_ENABLE() macro but can't be executed inside a code area protected by the Firewall.; When the Firewall is disabled, user can resort to HAL_FIREWALL_EnablePreArmFlag() API any time.; When the Firewall is enabled and NVDSL register is equal to 0 (that is, when the non volatile data segment is not defined), ** this API can be executed when the Firewall is closed ** when the Firewall is opened, user should resort to __HAL_FIREWALL_PREARM_ENABLE() macro instead; When the Firewall is enabled and NVDSL register is different from 0 (that is, when the non volatile data segment is defined) ** FW_CR register can be accessed only when the Firewall is opened: user should resort to __HAL_FIREWALL_PREARM_ENABLE() macro instead.

Return values:

None

Definition at line 245 of file stm32l4xx_hal_firewall.c.

void HAL_FIREWALL_GetConfig ( FIREWALL_InitTypeDef * fw_config )

Retrieve the Firewall configuration.

Parameters:

fw_config,: Firewall configuration, type is same as initialization structure

Note:: This API can't be executed inside a code area protected by the Firewall when the Firewall is enabled; If NVDSL register is different from 0, that is, if the non volatile data segment is defined, this API can't be executed when the Firewall is enabled.; User should resort to __HAL_FIREWALL_GET_PREARM() macro to retrieve FPA bit status

Return values:

None

Definition at line 183 of file stm32l4xx_hal_firewall.c.

References __HAL_RCC_FIREWALL_CLK_ENABLE, FIREWALL_InitTypeDef::CodeSegmentLength, FIREWALL_InitTypeDef::CodeSegmentStartAddress, FIREWALL_InitTypeDef::NonVDataSegmentLength, FIREWALL_InitTypeDef::NonVDataSegmentStartAddress, FIREWALL_InitTypeDef::VDataSegmentLength, FIREWALL_InitTypeDef::VDataSegmentStartAddress, FIREWALL_InitTypeDef::VolatileDataExecution, and FIREWALL_InitTypeDef::VolatileDataShared.