sai kiran / mbed-src

Watchdog Timer

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F3/stm32f3xx_hal_iwdg.c@635:ac7d6880524d, 2015-09-28 (annotated)

Committer:
mbed_official
Date:
Mon Sep 28 20:15:09 2015 +0100
Revision:
635:ac7d6880524d
Parent:
633:7687fb9c4f91 
Synchronized with git revision 9b7d23d47153c298a6d24de9a415202705889d11



Full URL: https://github.com/mbedmicro/mbed/commit/9b7d23d47153c298a6d24de9a415202705889d11/



Revert "[NUCLEO_F303K8] add support of the STM32F303K8"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /**
mbed_official 237:f3da66175598 2 ******************************************************************************
mbed_official 237:f3da66175598 3 * @file stm32f3xx_hal_iwdg.c
mbed_official 237:f3da66175598 4 * @author MCD Application Team
mbed_official 635:ac7d6880524d 5 * @version V1.1.0
mbed_official 635:ac7d6880524d 6 * @date 12-Sept-2014
mbed_official 237:f3da66175598 7 * @brief IWDG HAL module driver.
mbed_official 237:f3da66175598 8 *
mbed_official 237:f3da66175598 9 * This file provides firmware functions to manage the following
mbed_official 237:f3da66175598 10 * functionalities of the Independent Watchdog (IWDG) peripheral:
mbed_official 237:f3da66175598 11 * + Initialization and Configuration functions
mbed_official 237:f3da66175598 12 * + IO operation functions
mbed_official 237:f3da66175598 13 * + Peripheral State functions
mbed_official 237:f3da66175598 14 *
mbed_official 237:f3da66175598 15 @verbatim
mbed_official 237:f3da66175598 16
mbed_official 237:f3da66175598 17 ================================================================================
mbed_official 237:f3da66175598 18 ##### IWDG specific features #####
mbed_official 237:f3da66175598 19 ================================================================================
mbed_official 237:f3da66175598 20 [..]
mbed_official 237:f3da66175598 21 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 237:f3da66175598 22 through option byte).
mbed_official 237:f3da66175598 23 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 237:f3da66175598 24 thus stays active even if the main clock fails.
mbed_official 237:f3da66175598 25 (+) Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 237:f3da66175598 26 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 237:f3da66175598 27 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 237:f3da66175598 28 a system reset is generated.
mbed_official 237:f3da66175598 29 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 237:f3da66175598 30 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 237:f3da66175598 31 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 237:f3da66175598 32 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 237:f3da66175598 33 (+) IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 237:f3da66175598 34 reset occurs.
mbed_official 237:f3da66175598 35 (+) Min-max timeout value @41KHz (LSI): ~0.1ms / ~25.5s
mbed_official 237:f3da66175598 36 The IWDG timeout may vary due to LSI frequency dispersion. STM32F30x
mbed_official 237:f3da66175598 37 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 237:f3da66175598 38 connected internally to TIM16 CH1 input capture). The measured value
mbed_official 237:f3da66175598 39 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 237:f3da66175598 40 For more information, please refer to the STM32F3xx Reference manual.
mbed_official 237:f3da66175598 41
mbed_official 237:f3da66175598 42 ##### How to use this driver #####
mbed_official 237:f3da66175598 43 ==============================================================================
mbed_official 237:f3da66175598 44 [..]
mbed_official 237:f3da66175598 45 (#) if Window option is disabled
mbed_official 237:f3da66175598 46 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 237:f3da66175598 47 (++) Enable write access to IWDG_PR, IWDG_RLR.
mbed_official 237:f3da66175598 48 (++) Configure the IWDG prescaler, counter reload value.
mbed_official 237:f3da66175598 49 This reload value will be loaded in the IWDG counter each time the counter
mbed_official 237:f3da66175598 50 is reloaded, then the IWDG will start counting down from this value.
mbed_official 237:f3da66175598 51 (+) Use IWDG using HAL_IWDG_Start() function to :
mbed_official 237:f3da66175598 52 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 237:f3da66175598 53 (++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 237:f3da66175598 54 to enable the LSI, it will be enabled by hardware).
mbed_official 237:f3da66175598 55 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 237:f3da66175598 56 intervals during normal operation to prevent an MCU reset, using
mbed_official 237:f3da66175598 57 HAL_IWDG_Refresh() function.
mbed_official 237:f3da66175598 58 (#) if Window option is enabled:
mbed_official 237:f3da66175598 59 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
mbed_official 237:f3da66175598 60 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 237:f3da66175598 61 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
mbed_official 237:f3da66175598 62 (++) Configure the IWDG prescaler, reload value and window value.
mbed_official 237:f3da66175598 63 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 237:f3da66175598 64 intervals during normal operation to prevent an MCU reset, using
mbed_official 237:f3da66175598 65 HAL_IWDG_Refresh() function.
mbed_official 237:f3da66175598 66
mbed_official 237:f3da66175598 67 *** IWDG HAL driver macros list ***
mbed_official 237:f3da66175598 68 ====================================
mbed_official 237:f3da66175598 69 [..]
mbed_official 237:f3da66175598 70 Below the list of most used macros in IWDG HAL driver.
mbed_official 237:f3da66175598 71
mbed_official 237:f3da66175598 72 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 237:f3da66175598 73 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 237:f3da66175598 74 (+) __HAL_IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
mbed_official 237:f3da66175598 75 (+) __HAL_IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
mbed_official 237:f3da66175598 76 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 237:f3da66175598 77
mbed_official 237:f3da66175598 78 @endverbatim
mbed_official 237:f3da66175598 79 ******************************************************************************
mbed_official 237:f3da66175598 80 * @attention
mbed_official 237:f3da66175598 81 *
mbed_official 635:ac7d6880524d 82 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 237:f3da66175598 83 *
mbed_official 237:f3da66175598 84 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 237:f3da66175598 85 * are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 86 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 87 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 88 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 89 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 90 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 91 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 92 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 93 * without specific prior written permission.
mbed_official 237:f3da66175598 94 *
mbed_official 237:f3da66175598 95 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 96 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 97 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 98 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 99 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 100 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 101 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 102 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 103 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 104 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 105 *
mbed_official 237:f3da66175598 106 ******************************************************************************
mbed_official 237:f3da66175598 107 */
mbed_official 237:f3da66175598 108
mbed_official 237:f3da66175598 109 /* Includes ------------------------------------------------------------------*/
mbed_official 237:f3da66175598 110 #include "stm32f3xx_hal.h"
mbed_official 237:f3da66175598 111
mbed_official 237:f3da66175598 112 /** @addtogroup STM32F3xx_HAL_Driver
mbed_official 237:f3da66175598 113 * @{
mbed_official 237:f3da66175598 114 */
mbed_official 237:f3da66175598 115
mbed_official 375:3d36234a1087 116 /** @defgroup IWDG IWDG HAL module driver
mbed_official 237:f3da66175598 117 * @brief IWDG HAL module driver.
mbed_official 237:f3da66175598 118 * @{
mbed_official 237:f3da66175598 119 */
mbed_official 237:f3da66175598 120
mbed_official 237:f3da66175598 121 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 237:f3da66175598 122
mbed_official 237:f3da66175598 123 /* Private typedef -----------------------------------------------------------*/
mbed_official 237:f3da66175598 124 /* Private define ------------------------------------------------------------*/
mbed_official 375:3d36234a1087 125
mbed_official 375:3d36234a1087 126 /** @defgroup IWDG_Private_Defines IWDG Private Defines
mbed_official 375:3d36234a1087 127 * @{
mbed_official 375:3d36234a1087 128 */
mbed_official 375:3d36234a1087 129 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
mbed_official 375:3d36234a1087 130 /**
mbed_official 375:3d36234a1087 131 * @}
mbed_official 375:3d36234a1087 132 */
mbed_official 375:3d36234a1087 133
mbed_official 237:f3da66175598 134 /* Private macro -------------------------------------------------------------*/
mbed_official 237:f3da66175598 135 /* Private variables ---------------------------------------------------------*/
mbed_official 237:f3da66175598 136 /* Private function prototypes -----------------------------------------------*/
mbed_official 237:f3da66175598 137 /* Private functions ---------------------------------------------------------*/
mbed_official 237:f3da66175598 138
mbed_official 375:3d36234a1087 139 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
mbed_official 237:f3da66175598 140 * @{
mbed_official 237:f3da66175598 141 */
mbed_official 237:f3da66175598 142
mbed_official 375:3d36234a1087 143 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 237:f3da66175598 144 * @brief Initialization and Configuration functions.
mbed_official 237:f3da66175598 145 *
mbed_official 237:f3da66175598 146 @verbatim
mbed_official 237:f3da66175598 147 ===============================================================================
mbed_official 237:f3da66175598 148 ##### Initialization functions #####
mbed_official 237:f3da66175598 149 ===============================================================================
mbed_official 237:f3da66175598 150 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 151 (+) Initialize the IWDG according to the specified parameters
mbed_official 237:f3da66175598 152 in the IWDG_InitTypeDef and create the associated handle
mbed_official 237:f3da66175598 153 (+) Manage Window option
mbed_official 237:f3da66175598 154 (+) Initialize the IWDG MSP
mbed_official 237:f3da66175598 155
mbed_official 237:f3da66175598 156 @endverbatim
mbed_official 237:f3da66175598 157 * @{
mbed_official 237:f3da66175598 158 */
mbed_official 237:f3da66175598 159
mbed_official 237:f3da66175598 160 /**
mbed_official 237:f3da66175598 161 * @brief Initializes the IWDG according to the specified
mbed_official 237:f3da66175598 162 * parameters in the IWDG_InitTypeDef and creates the associated handle.
mbed_official 375:3d36234a1087 163 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 375:3d36234a1087 164 * the configuration information for the specified IWDG module.
mbed_official 237:f3da66175598 165 * @retval HAL status
mbed_official 237:f3da66175598 166 */
mbed_official 237:f3da66175598 167 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 168 {
mbed_official 237:f3da66175598 169 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 170
mbed_official 237:f3da66175598 171 /* Check the IWDG handle allocation */
mbed_official 635:ac7d6880524d 172 if(hiwdg == HAL_NULL)
mbed_official 237:f3da66175598 173 {
mbed_official 237:f3da66175598 174 return HAL_ERROR;
mbed_official 237:f3da66175598 175 }
mbed_official 237:f3da66175598 176
mbed_official 237:f3da66175598 177 /* Check the parameters */
mbed_official 237:f3da66175598 178 assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
mbed_official 237:f3da66175598 179 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 237:f3da66175598 180 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 237:f3da66175598 181 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 237:f3da66175598 182
mbed_official 237:f3da66175598 183 /* Check pending flag, if previous update not done, return error */
mbed_official 375:3d36234a1087 184 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 375:3d36234a1087 185 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 375:3d36234a1087 186 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
mbed_official 237:f3da66175598 187 {
mbed_official 237:f3da66175598 188 return HAL_ERROR;
mbed_official 237:f3da66175598 189 }
mbed_official 237:f3da66175598 190
mbed_official 237:f3da66175598 191 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 237:f3da66175598 192 {
mbed_official 237:f3da66175598 193 /* Init the low level hardware */
mbed_official 237:f3da66175598 194 HAL_IWDG_MspInit(hiwdg);
mbed_official 237:f3da66175598 195 }
mbed_official 237:f3da66175598 196
mbed_official 237:f3da66175598 197 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 198 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 199
mbed_official 237:f3da66175598 200 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 237:f3da66175598 201 /* by writing 0x5555 in KR */
mbed_official 237:f3da66175598 202 __HAL_IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 237:f3da66175598 203
mbed_official 237:f3da66175598 204 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 237:f3da66175598 205 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 237:f3da66175598 206 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 237:f3da66175598 207
mbed_official 237:f3da66175598 208 /* check if window option is enabled */
mbed_official 237:f3da66175598 209 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 237:f3da66175598 210 {
mbed_official 237:f3da66175598 211 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 212
mbed_official 237:f3da66175598 213 /* Wait for register to be updated */
mbed_official 237:f3da66175598 214 while((uint32_t)(hiwdg->Instance->SR) != RESET)
mbed_official 237:f3da66175598 215 {
mbed_official 237:f3da66175598 216 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 217 {
mbed_official 237:f3da66175598 218 /* Set IWDG state */
mbed_official 237:f3da66175598 219 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 220 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 221 }
mbed_official 237:f3da66175598 222 }
mbed_official 237:f3da66175598 223
mbed_official 237:f3da66175598 224 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 237:f3da66175598 225 MODIFY_REG(hiwdg->Instance->WINR, IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 237:f3da66175598 226
mbed_official 237:f3da66175598 227 }
mbed_official 237:f3da66175598 228 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 229 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 230
mbed_official 237:f3da66175598 231 /* Return function status */
mbed_official 237:f3da66175598 232 return HAL_OK;
mbed_official 237:f3da66175598 233 }
mbed_official 237:f3da66175598 234
mbed_official 237:f3da66175598 235 /**
mbed_official 237:f3da66175598 236 * @brief Initializes the IWDG MSP.
mbed_official 375:3d36234a1087 237 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 375:3d36234a1087 238 * the configuration information for the specified IWDG module.
mbed_official 237:f3da66175598 239 * @retval None
mbed_official 237:f3da66175598 240 */
mbed_official 237:f3da66175598 241 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 242 {
mbed_official 237:f3da66175598 243 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 244 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 237:f3da66175598 245 */
mbed_official 237:f3da66175598 246 }
mbed_official 237:f3da66175598 247
mbed_official 237:f3da66175598 248 /**
mbed_official 237:f3da66175598 249 * @}
mbed_official 237:f3da66175598 250 */
mbed_official 237:f3da66175598 251
mbed_official 375:3d36234a1087 252 /** @defgroup IWDG_Exported_Functions_Group2 Input and Output operation functions
mbed_official 237:f3da66175598 253 * @brief IO operation functions
mbed_official 237:f3da66175598 254 *
mbed_official 237:f3da66175598 255 @verbatim
mbed_official 237:f3da66175598 256 ===============================================================================
mbed_official 237:f3da66175598 257 ##### IO operation functions #####
mbed_official 237:f3da66175598 258 ===============================================================================
mbed_official 237:f3da66175598 259 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 260 (+) Start the IWDG.
mbed_official 237:f3da66175598 261 (+) Refresh the IWDG.
mbed_official 237:f3da66175598 262
mbed_official 237:f3da66175598 263 @endverbatim
mbed_official 237:f3da66175598 264 * @{
mbed_official 237:f3da66175598 265 */
mbed_official 237:f3da66175598 266
mbed_official 237:f3da66175598 267 /**
mbed_official 237:f3da66175598 268 * @brief Starts the IWDG.
mbed_official 375:3d36234a1087 269 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 375:3d36234a1087 270 * the configuration information for the specified IWDG module.
mbed_official 237:f3da66175598 271 * @retval HAL status
mbed_official 237:f3da66175598 272 */
mbed_official 237:f3da66175598 273 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 274 {
mbed_official 237:f3da66175598 275 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 276
mbed_official 237:f3da66175598 277 /* Process Locked */
mbed_official 237:f3da66175598 278 __HAL_LOCK(hiwdg);
mbed_official 237:f3da66175598 279
mbed_official 237:f3da66175598 280 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 281 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 282
mbed_official 237:f3da66175598 283 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 237:f3da66175598 284 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 237:f3da66175598 285 {
mbed_official 237:f3da66175598 286 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 237:f3da66175598 287 }
mbed_official 237:f3da66175598 288
mbed_official 237:f3da66175598 289 /* Enable the IWDG peripheral */
mbed_official 237:f3da66175598 290 __HAL_IWDG_START(hiwdg);
mbed_official 237:f3da66175598 291
mbed_official 237:f3da66175598 292 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 293
mbed_official 237:f3da66175598 294 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 375:3d36234a1087 295 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 375:3d36234a1087 296 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 375:3d36234a1087 297 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
mbed_official 237:f3da66175598 298 {
mbed_official 237:f3da66175598 299 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 300 {
mbed_official 237:f3da66175598 301 /* Set IWDG state */
mbed_official 237:f3da66175598 302 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 303
mbed_official 237:f3da66175598 304 /* Process unlocked */
mbed_official 237:f3da66175598 305 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 306
mbed_official 237:f3da66175598 307 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 308 }
mbed_official 237:f3da66175598 309 }
mbed_official 237:f3da66175598 310
mbed_official 237:f3da66175598 311 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 312 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 313
mbed_official 237:f3da66175598 314 /* Process Unlocked */
mbed_official 237:f3da66175598 315 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 316
mbed_official 237:f3da66175598 317 /* Return function status */
mbed_official 237:f3da66175598 318 return HAL_OK;
mbed_official 237:f3da66175598 319 }
mbed_official 237:f3da66175598 320
mbed_official 237:f3da66175598 321 /**
mbed_official 237:f3da66175598 322 * @brief Refreshes the IWDG.
mbed_official 375:3d36234a1087 323 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 375:3d36234a1087 324 * the configuration information for the specified IWDG module.
mbed_official 237:f3da66175598 325 * @retval HAL status
mbed_official 237:f3da66175598 326 */
mbed_official 237:f3da66175598 327 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 328 {
mbed_official 237:f3da66175598 329 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 330
mbed_official 237:f3da66175598 331 /* Process Locked */
mbed_official 237:f3da66175598 332 __HAL_LOCK(hiwdg);
mbed_official 237:f3da66175598 333
mbed_official 237:f3da66175598 334 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 335 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 336
mbed_official 237:f3da66175598 337 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 338
mbed_official 237:f3da66175598 339 /* Wait until RVU flag is RESET */
mbed_official 237:f3da66175598 340 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 237:f3da66175598 341 {
mbed_official 237:f3da66175598 342 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 343 {
mbed_official 237:f3da66175598 344 /* Set IWDG state */
mbed_official 237:f3da66175598 345 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 346
mbed_official 237:f3da66175598 347 /* Process unlocked */
mbed_official 237:f3da66175598 348 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 349
mbed_official 237:f3da66175598 350 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 351 }
mbed_official 237:f3da66175598 352 }
mbed_official 237:f3da66175598 353
mbed_official 237:f3da66175598 354 /* Reload IWDG counter with value defined in the reload register */
mbed_official 237:f3da66175598 355 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 237:f3da66175598 356
mbed_official 237:f3da66175598 357 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 358 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 359
mbed_official 237:f3da66175598 360 /* Process Unlocked */
mbed_official 237:f3da66175598 361 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 362
mbed_official 237:f3da66175598 363 /* Return function status */
mbed_official 237:f3da66175598 364 return HAL_OK;
mbed_official 237:f3da66175598 365 }
mbed_official 237:f3da66175598 366
mbed_official 237:f3da66175598 367 /**
mbed_official 237:f3da66175598 368 * @}
mbed_official 237:f3da66175598 369 */
mbed_official 237:f3da66175598 370
mbed_official 375:3d36234a1087 371 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 237:f3da66175598 372 * @brief Peripheral State functions.
mbed_official 237:f3da66175598 373 *
mbed_official 237:f3da66175598 374 @verbatim
mbed_official 237:f3da66175598 375 ===============================================================================
mbed_official 237:f3da66175598 376 ##### Peripheral State functions #####
mbed_official 237:f3da66175598 377 ===============================================================================
mbed_official 237:f3da66175598 378 [..]
mbed_official 237:f3da66175598 379 This subsection permits to get in run-time the status of the peripheral
mbed_official 237:f3da66175598 380 and the data flow.
mbed_official 237:f3da66175598 381
mbed_official 237:f3da66175598 382 @endverbatim
mbed_official 237:f3da66175598 383 * @{
mbed_official 237:f3da66175598 384 */
mbed_official 237:f3da66175598 385
mbed_official 237:f3da66175598 386 /**
mbed_official 237:f3da66175598 387 * @brief Returns the IWDG state.
mbed_official 375:3d36234a1087 388 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 375:3d36234a1087 389 * the configuration information for the specified IWDG module.
mbed_official 237:f3da66175598 390 * @retval HAL state
mbed_official 237:f3da66175598 391 */
mbed_official 237:f3da66175598 392 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 393 {
mbed_official 237:f3da66175598 394 return hiwdg->State;
mbed_official 237:f3da66175598 395 }
mbed_official 237:f3da66175598 396
mbed_official 237:f3da66175598 397 /**
mbed_official 237:f3da66175598 398 * @}
mbed_official 237:f3da66175598 399 */
mbed_official 237:f3da66175598 400
mbed_official 237:f3da66175598 401 /**
mbed_official 237:f3da66175598 402 * @}
mbed_official 237:f3da66175598 403 */
mbed_official 237:f3da66175598 404
mbed_official 237:f3da66175598 405 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 237:f3da66175598 406 /**
mbed_official 237:f3da66175598 407 * @}
mbed_official 237:f3da66175598 408 */
mbed_official 237:f3da66175598 409
mbed_official 237:f3da66175598 410 /**
mbed_official 237:f3da66175598 411 * @}
mbed_official 237:f3da66175598 412 */
mbed_official 237:f3da66175598 413
mbed_official 237:f3da66175598 414 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/