en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_firewall.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
113:b3775bf36a83
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file stm32l0xx_hal_firewall.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.2.0
bogdanm 0:9b334a45a8ff 6 * @date 06-February-2015
bogdanm 0:9b334a45a8ff 7 * @brief FIREWALL HAL module driver.
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * This file provides firmware functions to manage the Firewall
bogdanm 0:9b334a45a8ff 10 * Peripheral initialization and enabling.
bogdanm 0:9b334a45a8ff 11 *
bogdanm 0:9b334a45a8ff 12 *
bogdanm 0:9b334a45a8ff 13 @verbatim
bogdanm 0:9b334a45a8ff 14 ===============================================================================
bogdanm 0:9b334a45a8ff 15 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 16 ===============================================================================
bogdanm 0:9b334a45a8ff 17 [..]
bogdanm 0:9b334a45a8ff 18 The FIREWALL HAL driver can be used as follows:
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 (#) Declare a FIREWALL_InitTypeDef initialization structure.
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 (#) Resort to HAL_FIREWALL_Config() API to initialize the Firewall
bogdanm 0:9b334a45a8ff 23
bogdanm 0:9b334a45a8ff 24 (#) Enable the FIREWALL in calling HAL_FIREWALL_EnableFirewall() API
bogdanm 0:9b334a45a8ff 25
bogdanm 0:9b334a45a8ff 26 (#) To ensure that any code executed outside the protected segment closes the
bogdanm 0:9b334a45a8ff 27 FIREWALL, the user must set the flag FIREWALL_PRE_ARM_SET in calling
bogdanm 0:9b334a45a8ff 28 __HAL_FIREWALL_PREARM_ENABLE() macro if called within a protected code segment
bogdanm 0:9b334a45a8ff 29 or
bogdanm 0:9b334a45a8ff 30 HAL_FIREWALL_EnablePreArmFlag() API if called outside of protected code segment
bogdanm 0:9b334a45a8ff 31 after HAL_FIREWALL_Config() call.
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 @endverbatim
bogdanm 0:9b334a45a8ff 35 ******************************************************************************
bogdanm 0:9b334a45a8ff 36 * @attention
bogdanm 0:9b334a45a8ff 37 *
bogdanm 0:9b334a45a8ff 38 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 39 *
bogdanm 0:9b334a45a8ff 40 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 41 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 42 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 43 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 44 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 45 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 46 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 47 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 48 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 49 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 50 *
bogdanm 0:9b334a45a8ff 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 52 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 54 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 58 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 59 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 61 *
bogdanm 0:9b334a45a8ff 62 ******************************************************************************
bogdanm 0:9b334a45a8ff 63 */
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 66 #include "stm32l0xx_hal.h"
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 /** @addtogroup STM32L0xx_HAL_Driver
bogdanm 0:9b334a45a8ff 69 * @{
bogdanm 0:9b334a45a8ff 70 */
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72 /** @defgroup FIREWALL FIREWALL
bogdanm 0:9b334a45a8ff 73 * @brief HAL FIREWALL module driver
bogdanm 0:9b334a45a8ff 74 * @{
bogdanm 0:9b334a45a8ff 75 */
bogdanm 0:9b334a45a8ff 76 #ifdef HAL_FIREWALL_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 /* Private typedef -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 79 /* Private define ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 80 /* Private macro -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 81 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 82 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 83 /* Private functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 84
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 /** @defgroup FIREWALL_Exported_Functions FIREWALL Exported Functions
bogdanm 0:9b334a45a8ff 87 * @{
bogdanm 0:9b334a45a8ff 88 */
bogdanm 0:9b334a45a8ff 89
bogdanm 0:9b334a45a8ff 90 /** @defgroup FIREWALL_Exported_Functions_Group1 Initialization Functions
bogdanm 0:9b334a45a8ff 91 * @brief Initialization and Configuration Functions
bogdanm 0:9b334a45a8ff 92 *
bogdanm 0:9b334a45a8ff 93 @verbatim
bogdanm 0:9b334a45a8ff 94 ===============================================================================
bogdanm 0:9b334a45a8ff 95 ##### Initialization and Configuration functions #####
bogdanm 0:9b334a45a8ff 96 ===============================================================================
bogdanm 0:9b334a45a8ff 97 [..]
bogdanm 0:9b334a45a8ff 98 This subsection provides the functions allowing to initialize the Firewall.
bogdanm 0:9b334a45a8ff 99 Initialization is done by HAL_FIREWALL_Config():
bogdanm 0:9b334a45a8ff 100
bogdanm 0:9b334a45a8ff 101 (+) Enable the Firewall clock thru __HAL_RCC_FIREWALL_CLK_ENABLE() macro.
bogdanm 0:9b334a45a8ff 102
bogdanm 0:9b334a45a8ff 103 (+) Set the protected code segment address start and length.
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 (+) Set the protected non-volatile and/or volatile data segments
bogdanm 0:9b334a45a8ff 106 address starts and lengths if applicable.
bogdanm 0:9b334a45a8ff 107
bogdanm 0:9b334a45a8ff 108 (+) Set the volatile data segment execution and sharing status.
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 (+) Length must be set to 0 for an unprotected segment.
bogdanm 0:9b334a45a8ff 111
bogdanm 0:9b334a45a8ff 112 @endverbatim
bogdanm 0:9b334a45a8ff 113 * @{
bogdanm 0:9b334a45a8ff 114 */
bogdanm 0:9b334a45a8ff 115
bogdanm 0:9b334a45a8ff 116 /**
bogdanm 0:9b334a45a8ff 117 * @brief Initialize the Firewall according to the FIREWALL_InitTypeDef structure parameters.
bogdanm 0:9b334a45a8ff 118 * @param fw_init: Firewall initialization structure
bogdanm 0:9b334a45a8ff 119 * @note The API returns HAL_ERROR if the Firewall is already enabled.
bogdanm 0:9b334a45a8ff 120 * @retval HAL status
bogdanm 0:9b334a45a8ff 121 */
bogdanm 0:9b334a45a8ff 122 HAL_StatusTypeDef HAL_FIREWALL_Config(FIREWALL_InitTypeDef * fw_init)
bogdanm 0:9b334a45a8ff 123 {
bogdanm 0:9b334a45a8ff 124 /* Check the Firewall initialization structure allocation */
bogdanm 0:9b334a45a8ff 125 if(fw_init == NULL)
bogdanm 0:9b334a45a8ff 126 {
bogdanm 0:9b334a45a8ff 127 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 128 }
bogdanm 0:9b334a45a8ff 129
bogdanm 0:9b334a45a8ff 130 /* Enable Firewall clock */
bogdanm 0:9b334a45a8ff 131 __HAL_RCC_FIREWALL_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 132
bogdanm 0:9b334a45a8ff 133 /* Make sure that Firewall is not enabled already */
bogdanm 0:9b334a45a8ff 134 if (__HAL_FIREWALL_IS_ENABLED() != RESET)
bogdanm 0:9b334a45a8ff 135 {
bogdanm 0:9b334a45a8ff 136 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 137 }
bogdanm 0:9b334a45a8ff 138
bogdanm 0:9b334a45a8ff 139 /* Check Firewall configuration addresses and lengths when segment is protected */
bogdanm 0:9b334a45a8ff 140 /* Code segment */
bogdanm 0:9b334a45a8ff 141 if (fw_init->CodeSegmentLength != 0)
bogdanm 0:9b334a45a8ff 142 {
bogdanm 0:9b334a45a8ff 143 assert_param(IS_FIREWALL_CODE_SEGMENT_ADDRESS(fw_init->CodeSegmentStartAddress));
bogdanm 0:9b334a45a8ff 144 assert_param(IS_FIREWALL_CODE_SEGMENT_LENGTH(fw_init->CodeSegmentStartAddress, fw_init->CodeSegmentLength));
bogdanm 0:9b334a45a8ff 145 }
bogdanm 0:9b334a45a8ff 146 /* Non volatile data segment */
bogdanm 0:9b334a45a8ff 147 if (fw_init->NonVDataSegmentLength != 0)
bogdanm 0:9b334a45a8ff 148 {
bogdanm 0:9b334a45a8ff 149 assert_param(IS_FIREWALL_NONVOLATILEDATA_SEGMENT_ADDRESS(fw_init->NonVDataSegmentStartAddress));
bogdanm 0:9b334a45a8ff 150 assert_param(IS_FIREWALL_NONVOLATILEDATA_SEGMENT_LENGTH(fw_init->NonVDataSegmentStartAddress, fw_init->NonVDataSegmentLength));
bogdanm 0:9b334a45a8ff 151 }
bogdanm 0:9b334a45a8ff 152 /* Volatile data segment */
bogdanm 0:9b334a45a8ff 153 if (fw_init->VDataSegmentLength != 0)
bogdanm 0:9b334a45a8ff 154 {
bogdanm 0:9b334a45a8ff 155 assert_param(IS_FIREWALL_VOLATILEDATA_SEGMENT_ADDRESS(fw_init->VDataSegmentStartAddress));
bogdanm 0:9b334a45a8ff 156 assert_param(IS_FIREWALL_VOLATILEDATA_SEGMENT_LENGTH(fw_init->VDataSegmentStartAddress, fw_init->VDataSegmentLength));
bogdanm 0:9b334a45a8ff 157 }
bogdanm 0:9b334a45a8ff 158
bogdanm 0:9b334a45a8ff 159 /* Check Firewall Configuration Register parameters */
bogdanm 0:9b334a45a8ff 160 assert_param(IS_FIREWALL_VOLATILEDATA_EXECUTE(fw_init->VolatileDataExecution));
bogdanm 0:9b334a45a8ff 161 assert_param(IS_FIREWALL_VOLATILEDATA_SHARE(fw_init->VolatileDataShared));
bogdanm 0:9b334a45a8ff 162
bogdanm 0:9b334a45a8ff 163
bogdanm 0:9b334a45a8ff 164 /* Configuration */
bogdanm 0:9b334a45a8ff 165
bogdanm 0:9b334a45a8ff 166 /* Protected code segment start address configuration */
bogdanm 0:9b334a45a8ff 167 WRITE_REG(FW->CSSA, (FW_CSSA_ADD & fw_init->CodeSegmentStartAddress));
bogdanm 0:9b334a45a8ff 168 /* Protected code segment length configuration */
bogdanm 0:9b334a45a8ff 169 WRITE_REG(FW->CSL, (FW_CSL_LENG & fw_init->CodeSegmentLength));
bogdanm 0:9b334a45a8ff 170
bogdanm 0:9b334a45a8ff 171 /* Protected non volatile data segment start address configuration */
bogdanm 0:9b334a45a8ff 172 WRITE_REG(FW->NVDSSA, (FW_NVDSSA_ADD & fw_init->NonVDataSegmentStartAddress));
bogdanm 0:9b334a45a8ff 173 /* Protected non volatile data segment length configuration */
bogdanm 0:9b334a45a8ff 174 WRITE_REG(FW->NVDSL, (FW_NVDSL_LENG & fw_init->NonVDataSegmentLength));
bogdanm 0:9b334a45a8ff 175
bogdanm 0:9b334a45a8ff 176 /* Protected volatile data segment start address configuration */
bogdanm 0:9b334a45a8ff 177 WRITE_REG(FW->VDSSA, (FW_VDSSA_ADD & fw_init->VDataSegmentStartAddress));
bogdanm 0:9b334a45a8ff 178 /* Protected volatile data segment length configuration */
bogdanm 0:9b334a45a8ff 179 WRITE_REG(FW->VDSL, (FW_VDSL_LENG & fw_init->VDataSegmentLength));
bogdanm 0:9b334a45a8ff 180
bogdanm 0:9b334a45a8ff 181 /* Set Firewall Configuration Register VDE and VDS bits
bogdanm 0:9b334a45a8ff 182 (volatile data execution and shared configuration) */
bogdanm 0:9b334a45a8ff 183 MODIFY_REG(FW->CR, FW_CR_VDS|FW_CR_VDE, fw_init->VolatileDataExecution|fw_init->VolatileDataShared);
bogdanm 0:9b334a45a8ff 184
bogdanm 0:9b334a45a8ff 185 return HAL_OK;
bogdanm 0:9b334a45a8ff 186 }
bogdanm 0:9b334a45a8ff 187
bogdanm 0:9b334a45a8ff 188 /**
bogdanm 0:9b334a45a8ff 189 * @brief Retrieve the Firewall configuration.
bogdanm 0:9b334a45a8ff 190 * @param fw_config: Firewall configuration, type is same as initialization structure
bogdanm 0:9b334a45a8ff 191 * @note This API can't be executed inside a code area protected by the Firewall
bogdanm 0:9b334a45a8ff 192 * when the Firewall is enabled
bogdanm 0:9b334a45a8ff 193 * @note If NVDSL register is different from 0, that is, if the non volatile data segment
bogdanm 0:9b334a45a8ff 194 * is defined, this API can't be executed when the Firewall is enabled.
bogdanm 0:9b334a45a8ff 195 * @note User should resort to __HAL_FIREWALL_GET_PREARM() macro to retrieve FPA bit status
bogdanm 0:9b334a45a8ff 196 * @retval None
bogdanm 0:9b334a45a8ff 197 */
bogdanm 0:9b334a45a8ff 198 void HAL_FIREWALL_GetConfig(FIREWALL_InitTypeDef * fw_config)
bogdanm 0:9b334a45a8ff 199 {
bogdanm 0:9b334a45a8ff 200
bogdanm 0:9b334a45a8ff 201 /* Enable Firewall clock, in case no Firewall configuration has been carried
bogdanm 0:9b334a45a8ff 202 out up to this point */
bogdanm 0:9b334a45a8ff 203 __HAL_RCC_FIREWALL_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 204
bogdanm 0:9b334a45a8ff 205 /* Retrieve code segment protection setting */
bogdanm 0:9b334a45a8ff 206 fw_config->CodeSegmentStartAddress = (READ_REG(FW->CSSA) & FW_CSSA_ADD);
bogdanm 0:9b334a45a8ff 207 fw_config->CodeSegmentLength = (READ_REG(FW->CSL) & FW_CSL_LENG);
bogdanm 0:9b334a45a8ff 208
bogdanm 0:9b334a45a8ff 209 /* Retrieve non volatile data segment protection setting */
bogdanm 0:9b334a45a8ff 210 fw_config->NonVDataSegmentStartAddress = (READ_REG(FW->NVDSSA) & FW_NVDSSA_ADD);
bogdanm 0:9b334a45a8ff 211 fw_config->NonVDataSegmentLength = (READ_REG(FW->NVDSL) & FW_NVDSL_LENG);
bogdanm 0:9b334a45a8ff 212
bogdanm 0:9b334a45a8ff 213 /* Retrieve volatile data segment protection setting */
bogdanm 0:9b334a45a8ff 214 fw_config->VDataSegmentStartAddress = (READ_REG(FW->VDSSA) & FW_VDSSA_ADD);
bogdanm 0:9b334a45a8ff 215 fw_config->VDataSegmentLength = (READ_REG(FW->VDSL) & FW_VDSL_LENG);
bogdanm 0:9b334a45a8ff 216
bogdanm 0:9b334a45a8ff 217 /* Retrieve volatile data execution setting */
bogdanm 0:9b334a45a8ff 218 fw_config->VolatileDataExecution = (READ_REG(FW->CR) & FW_CR_VDE);
bogdanm 0:9b334a45a8ff 219
bogdanm 0:9b334a45a8ff 220 /* Retrieve volatile data shared setting */
bogdanm 0:9b334a45a8ff 221 fw_config->VolatileDataShared = (READ_REG(FW->CR) & FW_CR_VDS);
bogdanm 0:9b334a45a8ff 222
bogdanm 0:9b334a45a8ff 223 return;
bogdanm 0:9b334a45a8ff 224 }
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226
bogdanm 0:9b334a45a8ff 227
bogdanm 0:9b334a45a8ff 228 /**
bogdanm 0:9b334a45a8ff 229 * @brief Enable FIREWALL.
bogdanm 0:9b334a45a8ff 230 * @note Firewall is enabled in clearing FWDIS bit of SYSCFG CFGR1 register.
bogdanm 0:9b334a45a8ff 231 * Once enabled, the Firewall cannot be disabled by software. Only a
bogdanm 0:9b334a45a8ff 232 * system reset can set again FWDIS bit.
bogdanm 0:9b334a45a8ff 233 * @retval None
bogdanm 0:9b334a45a8ff 234 */
bogdanm 0:9b334a45a8ff 235 void HAL_FIREWALL_EnableFirewall(void)
bogdanm 0:9b334a45a8ff 236 {
bogdanm 0:9b334a45a8ff 237 /* Clears FWDIS bit of SYSCFG CFGR1 register */
bogdanm 0:9b334a45a8ff 238 CLEAR_BIT(SYSCFG->CFGR2, SYSCFG_CFGR2_FWDISEN);
bogdanm 0:9b334a45a8ff 239
bogdanm 0:9b334a45a8ff 240 }
bogdanm 0:9b334a45a8ff 241
bogdanm 0:9b334a45a8ff 242 /**
bogdanm 0:9b334a45a8ff 243 * @brief Enable FIREWALL pre arm.
bogdanm 0:9b334a45a8ff 244 * @note When FPA bit is set, any code executed outside the protected segment
bogdanm 0:9b334a45a8ff 245 * will close the Firewall.
bogdanm 0:9b334a45a8ff 246 * @note This API provides the same service as __HAL_FIREWALL_PREARM_ENABLE() macro
bogdanm 0:9b334a45a8ff 247 * but can't be executed inside a code area protected by the Firewall.
bogdanm 0:9b334a45a8ff 248 * @note -- When the Firewall is disabled, user can resort to
bogdanm 0:9b334a45a8ff 249 * HAL_FIREWALL_EnablePreArmFlag() API any time.
bogdanm 0:9b334a45a8ff 250 * -- When the Firewall is enabled and NVDSL register is equal to 0 (that is,
bogdanm 0:9b334a45a8ff 251 * when the non volatile data segment is not defined),
bogdanm 0:9b334a45a8ff 252 * ** this API can be executed when the Firewall is closed
bogdanm 0:9b334a45a8ff 253 * ** when the Firewall is opened, user should resort to
bogdanm 0:9b334a45a8ff 254 * __HAL_FIREWALL_PREARM_ENABLE() macro instead
bogdanm 0:9b334a45a8ff 255 * -- When the Firewall is enabled and NVDSL register is different from 0
bogdanm 0:9b334a45a8ff 256 * (that is, when the non volatile data segment is defined)
bogdanm 0:9b334a45a8ff 257 * ** FW_CR register can be accessed only when the Firewall is opened:
bogdanm 0:9b334a45a8ff 258 * user should resort to __HAL_FIREWALL_PREARM_ENABLE() macro instead.
bogdanm 0:9b334a45a8ff 259 * @retval None
bogdanm 0:9b334a45a8ff 260 */
bogdanm 0:9b334a45a8ff 261 void HAL_FIREWALL_EnablePreArmFlag(void)
bogdanm 0:9b334a45a8ff 262 {
bogdanm 0:9b334a45a8ff 263 /* Set FPA bit */
bogdanm 0:9b334a45a8ff 264 SET_BIT(FW->CR, FW_CR_FPA);
bogdanm 0:9b334a45a8ff 265 }
bogdanm 0:9b334a45a8ff 266
bogdanm 0:9b334a45a8ff 267
bogdanm 0:9b334a45a8ff 268 /**
bogdanm 0:9b334a45a8ff 269 * @brief Disable FIREWALL pre arm.
bogdanm 0:9b334a45a8ff 270 * @note When FPA bit is reset, any code executed outside the protected segment
bogdanm 0:9b334a45a8ff 271 * when the Firewall is opened will generate a system reset.
bogdanm 0:9b334a45a8ff 272 * @note This API provides the same service as __HAL_FIREWALL_PREARM_DISABLE() macro
bogdanm 0:9b334a45a8ff 273 * but can't be executed inside a code area protected by the Firewall.
bogdanm 0:9b334a45a8ff 274 * @note -- When the Firewall is disabled, user can resort to
bogdanm 0:9b334a45a8ff 275 * HAL_FIREWALL_EnablePreArmFlag() API any time.
bogdanm 0:9b334a45a8ff 276 * -- When the Firewall is enabled and NVDSL register is equal to 0 (that is,
bogdanm 0:9b334a45a8ff 277 * when the non volatile data segment is not defined),
bogdanm 0:9b334a45a8ff 278 * ** this API can be executed when the Firewall is closed
bogdanm 0:9b334a45a8ff 279 * ** when the Firewall is opened, user should resort to
bogdanm 0:9b334a45a8ff 280 * __HAL_FIREWALL_PREARM_DISABLE() macro instead
bogdanm 0:9b334a45a8ff 281 * -- When the Firewall is enabled and NVDSL register is different from 0
bogdanm 0:9b334a45a8ff 282 * (that is, when the non volatile data segment is defined)
bogdanm 0:9b334a45a8ff 283 * ** FW_CR register can be accessed only when the Firewall is opened:
bogdanm 0:9b334a45a8ff 284 * user should resort to __HAL_FIREWALL_PREARM_DISABLE() macro instead.
bogdanm 0:9b334a45a8ff 285
bogdanm 0:9b334a45a8ff 286 * @retval None
bogdanm 0:9b334a45a8ff 287 */
bogdanm 0:9b334a45a8ff 288 void HAL_FIREWALL_DisablePreArmFlag(void)
bogdanm 0:9b334a45a8ff 289 {
bogdanm 0:9b334a45a8ff 290 /* Clear FPA bit */
bogdanm 0:9b334a45a8ff 291 CLEAR_BIT(FW->CR, FW_CR_FPA);
bogdanm 0:9b334a45a8ff 292 }
bogdanm 0:9b334a45a8ff 293
bogdanm 0:9b334a45a8ff 294 /**
bogdanm 0:9b334a45a8ff 295 * @}
bogdanm 0:9b334a45a8ff 296 */
bogdanm 0:9b334a45a8ff 297
bogdanm 0:9b334a45a8ff 298 /**
bogdanm 0:9b334a45a8ff 299 * @}
bogdanm 0:9b334a45a8ff 300 */
bogdanm 0:9b334a45a8ff 301
bogdanm 0:9b334a45a8ff 302 #endif /* HAL_FIREWALL_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 303 /**
bogdanm 0:9b334a45a8ff 304 * @}
bogdanm 0:9b334a45a8ff 305 */
bogdanm 0:9b334a45a8ff 306
bogdanm 0:9b334a45a8ff 307 /**
bogdanm 0:9b334a45a8ff 308 * @}
bogdanm 0:9b334a45a8ff 309 */
bogdanm 0:9b334a45a8ff 310
bogdanm 0:9b334a45a8ff 311 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/