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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_iwdg.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /**
mbed_official 610:813dcc80987e 2 ******************************************************************************
mbed_official 610:813dcc80987e 3 * @file stm32l4xx_hal_iwdg.c
mbed_official 610:813dcc80987e 4 * @author MCD Application Team
mbed_official 610:813dcc80987e 5 * @version V1.0.0
mbed_official 610:813dcc80987e 6 * @date 26-June-2015
mbed_official 610:813dcc80987e 7 * @brief IWDG HAL module driver.
mbed_official 610:813dcc80987e 8 * This file provides firmware functions to manage the following
mbed_official 610:813dcc80987e 9 * functionalities of the Independent Watchdog (IWDG) peripheral:
mbed_official 610:813dcc80987e 10 * + Initialization and de-initialization functions
mbed_official 610:813dcc80987e 11 * + IO operation functions
mbed_official 610:813dcc80987e 12 * + Peripheral State functions
mbed_official 610:813dcc80987e 13 *
mbed_official 610:813dcc80987e 14 @verbatim
mbed_official 610:813dcc80987e 15 ==============================================================================
mbed_official 610:813dcc80987e 16 ##### IWDG Generic features #####
mbed_official 610:813dcc80987e 17 ==============================================================================
mbed_official 610:813dcc80987e 18 [..]
mbed_official 610:813dcc80987e 19 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 610:813dcc80987e 20 through option byte).
mbed_official 610:813dcc80987e 21
mbed_official 610:813dcc80987e 22 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 610:813dcc80987e 23 thus stays active even if the main clock fails.
mbed_official 610:813dcc80987e 24 Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 610:813dcc80987e 25 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 610:813dcc80987e 26 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 610:813dcc80987e 27 a system reset is generated.
mbed_official 610:813dcc80987e 28
mbed_official 610:813dcc80987e 29 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 610:813dcc80987e 30 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 610:813dcc80987e 31
mbed_official 610:813dcc80987e 32 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 610:813dcc80987e 33 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 610:813dcc80987e 34 IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 610:813dcc80987e 35 reset occurs.
mbed_official 610:813dcc80987e 36
mbed_official 610:813dcc80987e 37 [..] Min-max timeout value @32KHz (LSI): ~125us / ~32.7s
mbed_official 610:813dcc80987e 38 The IWDG timeout may vary due to LSI frequency dispersion. STM32L4xx
mbed_official 610:813dcc80987e 39 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 610:813dcc80987e 40 connected internally to TIM16 CH1 input capture). The measured value
mbed_official 610:813dcc80987e 41 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 610:813dcc80987e 42
mbed_official 610:813dcc80987e 43
mbed_official 610:813dcc80987e 44 ##### How to use this driver #####
mbed_official 610:813dcc80987e 45 ==============================================================================
mbed_official 610:813dcc80987e 46 [..]
mbed_official 610:813dcc80987e 47 If Window option is disabled
mbed_official 610:813dcc80987e 48
mbed_official 610:813dcc80987e 49 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 610:813dcc80987e 50 (++) Enable write access to IWDG_PR, IWDG_RLR.
mbed_official 610:813dcc80987e 51 (++) Configure the IWDG prescaler, counter reload value.
mbed_official 610:813dcc80987e 52 This reload value will be loaded in the IWDG counter each time the counter
mbed_official 610:813dcc80987e 53 is reloaded, then the IWDG will start counting down from this value.
mbed_official 610:813dcc80987e 54 (+) Use IWDG using HAL_IWDG_Start() function to :
mbed_official 610:813dcc80987e 55 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 610:813dcc80987e 56 (++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 610:813dcc80987e 57 to enable the LSI, it will be enabled by hardware).
mbed_official 610:813dcc80987e 58 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 610:813dcc80987e 59 intervals during normal operation to prevent an MCU reset, using
mbed_official 610:813dcc80987e 60 HAL_IWDG_Refresh() function.
mbed_official 610:813dcc80987e 61 [..]
mbed_official 610:813dcc80987e 62 if Window option is enabled:
mbed_official 610:813dcc80987e 63
mbed_official 610:813dcc80987e 64 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
mbed_official 610:813dcc80987e 65 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 610:813dcc80987e 66 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
mbed_official 610:813dcc80987e 67 (++) Configure the IWDG prescaler, reload value and window value.
mbed_official 610:813dcc80987e 68 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 610:813dcc80987e 69 intervals during normal operation to prevent an MCU reset, using
mbed_official 610:813dcc80987e 70 HAL_IWDG_Refresh() function.
mbed_official 610:813dcc80987e 71
mbed_official 610:813dcc80987e 72 *** IWDG HAL driver macros list ***
mbed_official 610:813dcc80987e 73 ====================================
mbed_official 610:813dcc80987e 74 [..]
mbed_official 610:813dcc80987e 75 Below the list of most used macros in IWDG HAL driver.
mbed_official 610:813dcc80987e 76
mbed_official 610:813dcc80987e 77 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 610:813dcc80987e 78 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 610:813dcc80987e 79 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 610:813dcc80987e 80
mbed_official 610:813dcc80987e 81 @endverbatim
mbed_official 610:813dcc80987e 82 ******************************************************************************
mbed_official 610:813dcc80987e 83 * @attention
mbed_official 610:813dcc80987e 84 *
mbed_official 610:813dcc80987e 85 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 610:813dcc80987e 86 *
mbed_official 610:813dcc80987e 87 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 610:813dcc80987e 88 * are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 89 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 90 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 91 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 92 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 93 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 94 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 95 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 96 * without specific prior written permission.
mbed_official 610:813dcc80987e 97 *
mbed_official 610:813dcc80987e 98 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 99 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 101 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 104 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 105 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 106 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 107 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 108 *
mbed_official 610:813dcc80987e 109 ******************************************************************************
mbed_official 610:813dcc80987e 110 */
mbed_official 610:813dcc80987e 111
mbed_official 610:813dcc80987e 112 /* Includes ------------------------------------------------------------------*/
mbed_official 610:813dcc80987e 113 #include "stm32l4xx_hal.h"
mbed_official 610:813dcc80987e 114
mbed_official 610:813dcc80987e 115 /** @addtogroup STM32L4xx_HAL_Driver
mbed_official 610:813dcc80987e 116 * @{
mbed_official 610:813dcc80987e 117 */
mbed_official 610:813dcc80987e 118
mbed_official 610:813dcc80987e 119 /** @defgroup IWDG IWDG
mbed_official 610:813dcc80987e 120 * @brief IWDG HAL module driver.
mbed_official 610:813dcc80987e 121 * @{
mbed_official 610:813dcc80987e 122 */
mbed_official 610:813dcc80987e 123
mbed_official 610:813dcc80987e 124 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 610:813dcc80987e 125
mbed_official 610:813dcc80987e 126 /* Private typedef -----------------------------------------------------------*/
mbed_official 610:813dcc80987e 127 /* Private define ------------------------------------------------------------*/
mbed_official 610:813dcc80987e 128 /** @defgroup IWDG_Private_Defines IWDG Private Defines
mbed_official 610:813dcc80987e 129 * @{
mbed_official 610:813dcc80987e 130 */
mbed_official 610:813dcc80987e 131
mbed_official 610:813dcc80987e 132 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
mbed_official 610:813dcc80987e 133 /* Local define used to check the SR status register */
mbed_official 610:813dcc80987e 134 #define IWDG_SR_FLAGS (IWDG_FLAG_PVU | IWDG_FLAG_RVU | IWDG_FLAG_WVU)
mbed_official 610:813dcc80987e 135
mbed_official 610:813dcc80987e 136 /**
mbed_official 610:813dcc80987e 137 * @}
mbed_official 610:813dcc80987e 138 */
mbed_official 610:813dcc80987e 139 /* Private macro -------------------------------------------------------------*/
mbed_official 610:813dcc80987e 140 /* Private variables ---------------------------------------------------------*/
mbed_official 610:813dcc80987e 141 /* Private function prototypes -----------------------------------------------*/
mbed_official 610:813dcc80987e 142 /* Exported functions --------------------------------------------------------*/
mbed_official 610:813dcc80987e 143
mbed_official 610:813dcc80987e 144 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
mbed_official 610:813dcc80987e 145 * @{
mbed_official 610:813dcc80987e 146 */
mbed_official 610:813dcc80987e 147
mbed_official 610:813dcc80987e 148 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 610:813dcc80987e 149 * @brief Initialization and Configuration functions.
mbed_official 610:813dcc80987e 150 *
mbed_official 610:813dcc80987e 151 @verbatim
mbed_official 610:813dcc80987e 152 ===============================================================================
mbed_official 610:813dcc80987e 153 ##### Initialization and de-initialization functions #####
mbed_official 610:813dcc80987e 154 ===============================================================================
mbed_official 610:813dcc80987e 155 [..] This section provides functions allowing to:
mbed_official 610:813dcc80987e 156 (+) Initialize the IWDG according to the specified parameters
mbed_official 610:813dcc80987e 157 in the IWDG_InitTypeDef and create the associated handle
mbed_official 610:813dcc80987e 158 (+) Manage Window option
mbed_official 610:813dcc80987e 159 (+) Initialize the IWDG MSP
mbed_official 610:813dcc80987e 160 (+) DeInitialize the IWDG MSP
mbed_official 610:813dcc80987e 161
mbed_official 610:813dcc80987e 162 @endverbatim
mbed_official 610:813dcc80987e 163 * @{
mbed_official 610:813dcc80987e 164 */
mbed_official 610:813dcc80987e 165
mbed_official 610:813dcc80987e 166 /**
mbed_official 610:813dcc80987e 167 * @brief Initialize the IWDG according to the specified
mbed_official 610:813dcc80987e 168 * parameters in the IWDG_InitTypeDef and initialize the associated handle.
mbed_official 610:813dcc80987e 169 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 170 * the configuration information for the specified IWDG module.
mbed_official 610:813dcc80987e 171 * @retval HAL status
mbed_official 610:813dcc80987e 172 */
mbed_official 610:813dcc80987e 173 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 610:813dcc80987e 174 {
mbed_official 610:813dcc80987e 175 uint32_t tickstart = 0;
mbed_official 610:813dcc80987e 176
mbed_official 610:813dcc80987e 177 /* Check the IWDG handle allocation */
mbed_official 610:813dcc80987e 178 if(hiwdg == NULL)
mbed_official 610:813dcc80987e 179 {
mbed_official 610:813dcc80987e 180 return HAL_ERROR;
mbed_official 610:813dcc80987e 181 }
mbed_official 610:813dcc80987e 182
mbed_official 610:813dcc80987e 183 /* Check the parameters */
mbed_official 610:813dcc80987e 184 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 610:813dcc80987e 185 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 610:813dcc80987e 186 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 610:813dcc80987e 187
mbed_official 610:813dcc80987e 188 /* Check pending flag, if previous update not done, return error */
mbed_official 610:813dcc80987e 189 if(((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 610:813dcc80987e 190 {
mbed_official 610:813dcc80987e 191 return HAL_ERROR;
mbed_official 610:813dcc80987e 192 }
mbed_official 610:813dcc80987e 193
mbed_official 610:813dcc80987e 194 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 610:813dcc80987e 195 {
mbed_official 610:813dcc80987e 196 /* Allocate lock resource and initialize it */
mbed_official 610:813dcc80987e 197 hiwdg->Lock = HAL_UNLOCKED;
mbed_official 610:813dcc80987e 198
mbed_official 610:813dcc80987e 199 /* Init the low level hardware */
mbed_official 610:813dcc80987e 200 HAL_IWDG_MspInit(hiwdg);
mbed_official 610:813dcc80987e 201 }
mbed_official 610:813dcc80987e 202
mbed_official 610:813dcc80987e 203 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 204 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 610:813dcc80987e 205
mbed_official 610:813dcc80987e 206 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 610:813dcc80987e 207 /* by writing 0x5555 in KR */
mbed_official 610:813dcc80987e 208 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 610:813dcc80987e 209
mbed_official 610:813dcc80987e 210 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 610:813dcc80987e 211 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 610:813dcc80987e 212 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 610:813dcc80987e 213
mbed_official 610:813dcc80987e 214 /* check if window option is enabled */
mbed_official 610:813dcc80987e 215 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 610:813dcc80987e 216 {
mbed_official 610:813dcc80987e 217 tickstart = HAL_GetTick();
mbed_official 610:813dcc80987e 218
mbed_official 610:813dcc80987e 219 /* Wait for register to be updated */
mbed_official 610:813dcc80987e 220 while(((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 610:813dcc80987e 221 {
mbed_official 610:813dcc80987e 222 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 610:813dcc80987e 223 {
mbed_official 610:813dcc80987e 224 /* Set IWDG state */
mbed_official 610:813dcc80987e 225 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 610:813dcc80987e 226 return HAL_TIMEOUT;
mbed_official 610:813dcc80987e 227 }
mbed_official 610:813dcc80987e 228 }
mbed_official 610:813dcc80987e 229
mbed_official 610:813dcc80987e 230 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 610:813dcc80987e 231 MODIFY_REG(hiwdg->Instance->WINR, IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 610:813dcc80987e 232 }
mbed_official 610:813dcc80987e 233
mbed_official 610:813dcc80987e 234 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 235 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 610:813dcc80987e 236
mbed_official 610:813dcc80987e 237 /* Return function status */
mbed_official 610:813dcc80987e 238 return HAL_OK;
mbed_official 610:813dcc80987e 239 }
mbed_official 610:813dcc80987e 240
mbed_official 610:813dcc80987e 241 /**
mbed_official 610:813dcc80987e 242 * @brief Initialize the IWDG MSP.
mbed_official 610:813dcc80987e 243 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 244 * the configuration information for the specified IWDG module.
mbed_official 610:813dcc80987e 245 * @retval None
mbed_official 610:813dcc80987e 246 */
mbed_official 610:813dcc80987e 247 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 610:813dcc80987e 248 {
mbed_official 610:813dcc80987e 249 /* NOTE : This function should not be modified, when the callback is needed,
mbed_official 610:813dcc80987e 250 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 610:813dcc80987e 251 */
mbed_official 610:813dcc80987e 252 }
mbed_official 610:813dcc80987e 253
mbed_official 610:813dcc80987e 254 /**
mbed_official 610:813dcc80987e 255 * @}
mbed_official 610:813dcc80987e 256 */
mbed_official 610:813dcc80987e 257
mbed_official 610:813dcc80987e 258 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
mbed_official 610:813dcc80987e 259 * @brief IO operation functions
mbed_official 610:813dcc80987e 260 *
mbed_official 610:813dcc80987e 261 @verbatim
mbed_official 610:813dcc80987e 262 ===============================================================================
mbed_official 610:813dcc80987e 263 ##### IO operation functions #####
mbed_official 610:813dcc80987e 264 ===============================================================================
mbed_official 610:813dcc80987e 265 [..] This section provides functions allowing to:
mbed_official 610:813dcc80987e 266 (+) Start the IWDG.
mbed_official 610:813dcc80987e 267 (+) Refresh the IWDG.
mbed_official 610:813dcc80987e 268
mbed_official 610:813dcc80987e 269 @endverbatim
mbed_official 610:813dcc80987e 270 * @{
mbed_official 610:813dcc80987e 271 */
mbed_official 610:813dcc80987e 272
mbed_official 610:813dcc80987e 273 /**
mbed_official 610:813dcc80987e 274 * @brief Start the IWDG.
mbed_official 610:813dcc80987e 275 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 276 * the configuration information for the specified IWDG module.
mbed_official 610:813dcc80987e 277 * @retval HAL status
mbed_official 610:813dcc80987e 278 */
mbed_official 610:813dcc80987e 279 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 610:813dcc80987e 280 {
mbed_official 610:813dcc80987e 281 uint32_t tickstart = 0;
mbed_official 610:813dcc80987e 282
mbed_official 610:813dcc80987e 283 /* Process locked */
mbed_official 610:813dcc80987e 284 __HAL_LOCK(hiwdg);
mbed_official 610:813dcc80987e 285
mbed_official 610:813dcc80987e 286 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 287 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 610:813dcc80987e 288
mbed_official 610:813dcc80987e 289 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 610:813dcc80987e 290 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 610:813dcc80987e 291 {
mbed_official 610:813dcc80987e 292 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 610:813dcc80987e 293 }
mbed_official 610:813dcc80987e 294
mbed_official 610:813dcc80987e 295 /* Start the IWDG peripheral */
mbed_official 610:813dcc80987e 296 __HAL_IWDG_START(hiwdg);
mbed_official 610:813dcc80987e 297
mbed_official 610:813dcc80987e 298 tickstart = HAL_GetTick();
mbed_official 610:813dcc80987e 299
mbed_official 610:813dcc80987e 300 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 610:813dcc80987e 301 while(((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 610:813dcc80987e 302 {
mbed_official 610:813dcc80987e 303
mbed_official 610:813dcc80987e 304 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 610:813dcc80987e 305 {
mbed_official 610:813dcc80987e 306 /* Set IWDG state */
mbed_official 610:813dcc80987e 307 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 610:813dcc80987e 308
mbed_official 610:813dcc80987e 309 /* Process unlocked */
mbed_official 610:813dcc80987e 310 __HAL_UNLOCK(hiwdg);
mbed_official 610:813dcc80987e 311
mbed_official 610:813dcc80987e 312 return HAL_TIMEOUT;
mbed_official 610:813dcc80987e 313 }
mbed_official 610:813dcc80987e 314 }
mbed_official 610:813dcc80987e 315
mbed_official 610:813dcc80987e 316 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 317 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 610:813dcc80987e 318
mbed_official 610:813dcc80987e 319 /* Process Unlocked */
mbed_official 610:813dcc80987e 320 __HAL_UNLOCK(hiwdg);
mbed_official 610:813dcc80987e 321
mbed_official 610:813dcc80987e 322 /* Return function status */
mbed_official 610:813dcc80987e 323 return HAL_OK;
mbed_official 610:813dcc80987e 324 }
mbed_official 610:813dcc80987e 325
mbed_official 610:813dcc80987e 326 /**
mbed_official 610:813dcc80987e 327 * @brief Refresh the IWDG.
mbed_official 610:813dcc80987e 328 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 329 * the configuration information for the specified IWDG module.
mbed_official 610:813dcc80987e 330 * @retval HAL status
mbed_official 610:813dcc80987e 331 */
mbed_official 610:813dcc80987e 332 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 610:813dcc80987e 333 {
mbed_official 610:813dcc80987e 334 uint32_t tickstart = 0;
mbed_official 610:813dcc80987e 335
mbed_official 610:813dcc80987e 336 /* Process Locked */
mbed_official 610:813dcc80987e 337 __HAL_LOCK(hiwdg);
mbed_official 610:813dcc80987e 338
mbed_official 610:813dcc80987e 339 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 340 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 610:813dcc80987e 341
mbed_official 610:813dcc80987e 342 tickstart = HAL_GetTick();
mbed_official 610:813dcc80987e 343
mbed_official 610:813dcc80987e 344 /* Wait until RVU flag is RESET */
mbed_official 610:813dcc80987e 345 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 610:813dcc80987e 346 {
mbed_official 610:813dcc80987e 347 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 610:813dcc80987e 348 {
mbed_official 610:813dcc80987e 349 /* Set IWDG state */
mbed_official 610:813dcc80987e 350 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 610:813dcc80987e 351
mbed_official 610:813dcc80987e 352 /* Process unlocked */
mbed_official 610:813dcc80987e 353 __HAL_UNLOCK(hiwdg);
mbed_official 610:813dcc80987e 354
mbed_official 610:813dcc80987e 355 return HAL_TIMEOUT;
mbed_official 610:813dcc80987e 356 }
mbed_official 610:813dcc80987e 357 }
mbed_official 610:813dcc80987e 358
mbed_official 610:813dcc80987e 359 /* Reload IWDG counter with value defined in the reload register */
mbed_official 610:813dcc80987e 360 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 610:813dcc80987e 361
mbed_official 610:813dcc80987e 362 /* Change IWDG peripheral state */
mbed_official 610:813dcc80987e 363 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 610:813dcc80987e 364
mbed_official 610:813dcc80987e 365 /* Process Unlocked */
mbed_official 610:813dcc80987e 366 __HAL_UNLOCK(hiwdg);
mbed_official 610:813dcc80987e 367
mbed_official 610:813dcc80987e 368 /* Return function status */
mbed_official 610:813dcc80987e 369 return HAL_OK;
mbed_official 610:813dcc80987e 370 }
mbed_official 610:813dcc80987e 371
mbed_official 610:813dcc80987e 372 /**
mbed_official 610:813dcc80987e 373 * @}
mbed_official 610:813dcc80987e 374 */
mbed_official 610:813dcc80987e 375
mbed_official 610:813dcc80987e 376 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 610:813dcc80987e 377 * @brief Peripheral State functions.
mbed_official 610:813dcc80987e 378 *
mbed_official 610:813dcc80987e 379 @verbatim
mbed_official 610:813dcc80987e 380 ===============================================================================
mbed_official 610:813dcc80987e 381 ##### Peripheral State functions #####
mbed_official 610:813dcc80987e 382 ===============================================================================
mbed_official 610:813dcc80987e 383 [..]
mbed_official 610:813dcc80987e 384 This subsection permits to get in run-time the status of the peripheral.
mbed_official 610:813dcc80987e 385
mbed_official 610:813dcc80987e 386 @endverbatim
mbed_official 610:813dcc80987e 387 * @{
mbed_official 610:813dcc80987e 388 */
mbed_official 610:813dcc80987e 389
mbed_official 610:813dcc80987e 390 /**
mbed_official 610:813dcc80987e 391 * @brief Return the IWDG handle state.
mbed_official 610:813dcc80987e 392 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 393 * the configuration information for the specified IWDG module.
mbed_official 610:813dcc80987e 394 * @retval HAL state
mbed_official 610:813dcc80987e 395 */
mbed_official 610:813dcc80987e 396 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 610:813dcc80987e 397 {
mbed_official 610:813dcc80987e 398 /* Return IWDG handle state */
mbed_official 610:813dcc80987e 399 return hiwdg->State;
mbed_official 610:813dcc80987e 400 }
mbed_official 610:813dcc80987e 401
mbed_official 610:813dcc80987e 402 /**
mbed_official 610:813dcc80987e 403 * @}
mbed_official 610:813dcc80987e 404 */
mbed_official 610:813dcc80987e 405
mbed_official 610:813dcc80987e 406 /**
mbed_official 610:813dcc80987e 407 * @}
mbed_official 610:813dcc80987e 408 */
mbed_official 610:813dcc80987e 409
mbed_official 610:813dcc80987e 410 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 610:813dcc80987e 411 /**
mbed_official 610:813dcc80987e 412 * @}
mbed_official 610:813dcc80987e 413 */
mbed_official 610:813dcc80987e 414
mbed_official 610:813dcc80987e 415 /**
mbed_official 610:813dcc80987e 416 * @}
mbed_official 610:813dcc80987e 417 */
mbed_official 610:813dcc80987e 418
mbed_official 610:813dcc80987e 419 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/