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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L1/stm32l1xx_hal_iwdg.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Parent:
394:83f921546702 
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081



Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/



Initial version of drivers for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 354:e67efb2aab0e 1 /**
mbed_official 354:e67efb2aab0e 2 ******************************************************************************
mbed_official 354:e67efb2aab0e 3 * @file stm32l1xx_hal_iwdg.c
mbed_official 354:e67efb2aab0e 4 * @author MCD Application Team
mbed_official 354:e67efb2aab0e 5 * @version V1.0.0
mbed_official 354:e67efb2aab0e 6 * @date 5-September-2014
mbed_official 354:e67efb2aab0e 7 * @brief IWDG HAL module driver.
mbed_official 354:e67efb2aab0e 8 *
mbed_official 354:e67efb2aab0e 9 * This file provides firmware functions to manage the following
mbed_official 354:e67efb2aab0e 10 * functionalities of the IWDG peripheral:
mbed_official 354:e67efb2aab0e 11 * + Initialization and Configuration functions
mbed_official 354:e67efb2aab0e 12 * + IO operation functions
mbed_official 354:e67efb2aab0e 13 * + Peripheral State functions
mbed_official 354:e67efb2aab0e 14 *
mbed_official 354:e67efb2aab0e 15 @verbatim
mbed_official 354:e67efb2aab0e 16
mbed_official 354:e67efb2aab0e 17 ================================================================================
mbed_official 354:e67efb2aab0e 18 ##### IWDG specific features #####
mbed_official 354:e67efb2aab0e 19 ================================================================================
mbed_official 354:e67efb2aab0e 20 [..]
mbed_official 354:e67efb2aab0e 21 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 354:e67efb2aab0e 22 through option byte).
mbed_official 354:e67efb2aab0e 23 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 354:e67efb2aab0e 24 thus stays active even if the main clock fails.
mbed_official 354:e67efb2aab0e 25 (+) Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 354:e67efb2aab0e 26 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 354:e67efb2aab0e 27 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 354:e67efb2aab0e 28 a system reset is generated.
mbed_official 354:e67efb2aab0e 29 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 354:e67efb2aab0e 30 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 354:e67efb2aab0e 31 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 354:e67efb2aab0e 32 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 354:e67efb2aab0e 33 (+) IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 354:e67efb2aab0e 34 reset occurs.
mbed_official 354:e67efb2aab0e 35
mbed_official 354:e67efb2aab0e 36 (+) Min-max timeout value @37KHz (LSI): ~108us / ~28.3s
mbed_official 354:e67efb2aab0e 37 The IWDG timeout may vary due to LSI frequency dispersion. STM32L1xx
mbed_official 354:e67efb2aab0e 38 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 354:e67efb2aab0e 39 connected internally to TIM10 CH1 input capture). The measured value
mbed_official 354:e67efb2aab0e 40 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 354:e67efb2aab0e 41 For more information, please refer to the STM32L1xx Reference manual.
mbed_official 354:e67efb2aab0e 42
mbed_official 354:e67efb2aab0e 43 ##### How to use this driver #####
mbed_official 354:e67efb2aab0e 44 ==============================================================================
mbed_official 354:e67efb2aab0e 45 [..]
mbed_official 354:e67efb2aab0e 46 (+) Set the IWDG prescaler and reload value
mbed_official 354:e67efb2aab0e 47 using HAL_IWDG_Init() function.
mbed_official 354:e67efb2aab0e 48 (+) Use IWDG using HAL_IWDG_Start() function to:
mbed_official 354:e67efb2aab0e 49 (++) Enable write access to IWDG_PR and IWDG_RLR registers.
mbed_official 354:e67efb2aab0e 50 (++) Configure the IWDG prescaler and counter reload values.
mbed_official 354:e67efb2aab0e 51 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 354:e67efb2aab0e 52 (++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 354:e67efb2aab0e 53 to enable the LSI, it will be enabled by hardware).
mbed_official 354:e67efb2aab0e 54 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 354:e67efb2aab0e 55 intervals during normal operation to prevent an MCU reset, using
mbed_official 354:e67efb2aab0e 56 HAL_IWDG_Refresh() function.
mbed_official 354:e67efb2aab0e 57
mbed_official 354:e67efb2aab0e 58 *** IWDG HAL driver macros list ***
mbed_official 354:e67efb2aab0e 59 ====================================
mbed_official 354:e67efb2aab0e 60 [..]
mbed_official 354:e67efb2aab0e 61 Below the list of most used macros in IWDG HAL driver.
mbed_official 354:e67efb2aab0e 62
mbed_official 354:e67efb2aab0e 63 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 354:e67efb2aab0e 64 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 354:e67efb2aab0e 65 (+) __HAL_IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
mbed_official 354:e67efb2aab0e 66 (+) __HAL_IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
mbed_official 354:e67efb2aab0e 67 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 354:e67efb2aab0e 68 (+) __HAL_IWDG_CLEAR_FLAG: Clear the IWDG's pending flags
mbed_official 354:e67efb2aab0e 69
mbed_official 354:e67efb2aab0e 70 @endverbatim
mbed_official 354:e67efb2aab0e 71 ******************************************************************************
mbed_official 354:e67efb2aab0e 72 * @attention
mbed_official 354:e67efb2aab0e 73 *
mbed_official 354:e67efb2aab0e 74 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 354:e67efb2aab0e 75 *
mbed_official 354:e67efb2aab0e 76 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 354:e67efb2aab0e 77 * are permitted provided that the following conditions are met:
mbed_official 354:e67efb2aab0e 78 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 354:e67efb2aab0e 79 * this list of conditions and the following disclaimer.
mbed_official 354:e67efb2aab0e 80 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 354:e67efb2aab0e 81 * this list of conditions and the following disclaimer in the documentation
mbed_official 354:e67efb2aab0e 82 * and/or other materials provided with the distribution.
mbed_official 354:e67efb2aab0e 83 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 354:e67efb2aab0e 84 * may be used to endorse or promote products derived from this software
mbed_official 354:e67efb2aab0e 85 * without specific prior written permission.
mbed_official 354:e67efb2aab0e 86 *
mbed_official 354:e67efb2aab0e 87 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 354:e67efb2aab0e 88 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 354:e67efb2aab0e 89 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 354:e67efb2aab0e 90 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 354:e67efb2aab0e 91 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 354:e67efb2aab0e 92 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 354:e67efb2aab0e 93 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 354:e67efb2aab0e 94 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 354:e67efb2aab0e 95 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 354:e67efb2aab0e 96 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 354:e67efb2aab0e 97 *
mbed_official 354:e67efb2aab0e 98 ******************************************************************************
mbed_official 354:e67efb2aab0e 99 */
mbed_official 354:e67efb2aab0e 100
mbed_official 354:e67efb2aab0e 101 /* Includes ------------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 102 #include "stm32l1xx_hal.h"
mbed_official 354:e67efb2aab0e 103
mbed_official 354:e67efb2aab0e 104 /** @addtogroup STM32L1xx_HAL_Driver
mbed_official 354:e67efb2aab0e 105 * @{
mbed_official 354:e67efb2aab0e 106 */
mbed_official 354:e67efb2aab0e 107
mbed_official 354:e67efb2aab0e 108 /** @defgroup IWDG IWDG
mbed_official 354:e67efb2aab0e 109 * @brief IWDG HAL module driver.
mbed_official 354:e67efb2aab0e 110 * @{
mbed_official 354:e67efb2aab0e 111 */
mbed_official 354:e67efb2aab0e 112
mbed_official 354:e67efb2aab0e 113 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 354:e67efb2aab0e 114
mbed_official 354:e67efb2aab0e 115 /* Private typedef -----------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 116 /* Private define ------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 117
mbed_official 354:e67efb2aab0e 118 /** @defgroup IWDG_Private_Defines IWDG Private Defines
mbed_official 354:e67efb2aab0e 119 * @{
mbed_official 354:e67efb2aab0e 120 */
mbed_official 354:e67efb2aab0e 121
mbed_official 354:e67efb2aab0e 122 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
mbed_official 354:e67efb2aab0e 123
mbed_official 354:e67efb2aab0e 124 /**
mbed_official 354:e67efb2aab0e 125 * @}
mbed_official 354:e67efb2aab0e 126 */
mbed_official 354:e67efb2aab0e 127
mbed_official 354:e67efb2aab0e 128 /* Private macro -------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 129 /* Private variables ---------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 130 /* Private function prototypes -----------------------------------------------*/
mbed_official 354:e67efb2aab0e 131 /* Private functions ---------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 132
mbed_official 354:e67efb2aab0e 133 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
mbed_official 354:e67efb2aab0e 134 * @{
mbed_official 354:e67efb2aab0e 135 */
mbed_official 354:e67efb2aab0e 136
mbed_official 354:e67efb2aab0e 137 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 354:e67efb2aab0e 138 * @brief Initialization and Configuration functions.
mbed_official 354:e67efb2aab0e 139 *
mbed_official 354:e67efb2aab0e 140 @verbatim
mbed_official 354:e67efb2aab0e 141 ===============================================================================
mbed_official 354:e67efb2aab0e 142 ##### Initialization and de-initialization functions #####
mbed_official 354:e67efb2aab0e 143 ===============================================================================
mbed_official 354:e67efb2aab0e 144 [..] This section provides functions allowing to:
mbed_official 354:e67efb2aab0e 145 (+) Initialize the IWDG according to the specified parameters
mbed_official 354:e67efb2aab0e 146 in the IWDG_InitTypeDef and create the associated handle
mbed_official 354:e67efb2aab0e 147 (+) Initialize the IWDG MSP
mbed_official 354:e67efb2aab0e 148 (+) DeInitialize IWDG MSP
mbed_official 354:e67efb2aab0e 149
mbed_official 354:e67efb2aab0e 150 @endverbatim
mbed_official 354:e67efb2aab0e 151 * @{
mbed_official 354:e67efb2aab0e 152 */
mbed_official 354:e67efb2aab0e 153
mbed_official 354:e67efb2aab0e 154 /**
mbed_official 354:e67efb2aab0e 155 * @brief Initializes the IWDG according to the specified
mbed_official 354:e67efb2aab0e 156 * parameters in the IWDG_InitTypeDef and creates the associated handle.
mbed_official 354:e67efb2aab0e 157 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 158 * the configuration information for the specified IWDG module.
mbed_official 354:e67efb2aab0e 159 * @retval HAL status
mbed_official 354:e67efb2aab0e 160 */
mbed_official 354:e67efb2aab0e 161 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 354:e67efb2aab0e 162 {
mbed_official 354:e67efb2aab0e 163 /* Check the IWDG handle allocation */
mbed_official 354:e67efb2aab0e 164 if(hiwdg == HAL_NULL)
mbed_official 354:e67efb2aab0e 165 {
mbed_official 354:e67efb2aab0e 166 return HAL_ERROR;
mbed_official 354:e67efb2aab0e 167 }
mbed_official 354:e67efb2aab0e 168
mbed_official 354:e67efb2aab0e 169 /* Check the parameters */
mbed_official 354:e67efb2aab0e 170 assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
mbed_official 354:e67efb2aab0e 171 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 354:e67efb2aab0e 172 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 354:e67efb2aab0e 173
mbed_official 354:e67efb2aab0e 174 /* Check pending flag, if previous update not done, return error */
mbed_official 354:e67efb2aab0e 175 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 354:e67efb2aab0e 176 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET))
mbed_official 354:e67efb2aab0e 177 {
mbed_official 354:e67efb2aab0e 178 return HAL_ERROR;
mbed_official 354:e67efb2aab0e 179 }
mbed_official 354:e67efb2aab0e 180
mbed_official 354:e67efb2aab0e 181 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 354:e67efb2aab0e 182 {
mbed_official 354:e67efb2aab0e 183 /* Init the low level hardware */
mbed_official 354:e67efb2aab0e 184 HAL_IWDG_MspInit(hiwdg);
mbed_official 354:e67efb2aab0e 185 }
mbed_official 354:e67efb2aab0e 186
mbed_official 354:e67efb2aab0e 187 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 188 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 189
mbed_official 354:e67efb2aab0e 190 /* Enable write access to IWDG_PR and IWDG_RLR registers */
mbed_official 354:e67efb2aab0e 191 __HAL_IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 354:e67efb2aab0e 192
mbed_official 354:e67efb2aab0e 193 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 354:e67efb2aab0e 194 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 354:e67efb2aab0e 195 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 354:e67efb2aab0e 196
mbed_official 354:e67efb2aab0e 197 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 198 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 199
mbed_official 354:e67efb2aab0e 200 /* Return function status */
mbed_official 354:e67efb2aab0e 201 return HAL_OK;
mbed_official 354:e67efb2aab0e 202 }
mbed_official 354:e67efb2aab0e 203
mbed_official 354:e67efb2aab0e 204 /**
mbed_official 354:e67efb2aab0e 205 * @brief Initializes the IWDG MSP.
mbed_official 354:e67efb2aab0e 206 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 207 * the configuration information for the specified IWDG module.
mbed_official 354:e67efb2aab0e 208 * @retval None
mbed_official 354:e67efb2aab0e 209 */
mbed_official 354:e67efb2aab0e 210 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 354:e67efb2aab0e 211 {
mbed_official 354:e67efb2aab0e 212 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 354:e67efb2aab0e 213 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 354:e67efb2aab0e 214 */
mbed_official 354:e67efb2aab0e 215 }
mbed_official 354:e67efb2aab0e 216
mbed_official 354:e67efb2aab0e 217 /**
mbed_official 354:e67efb2aab0e 218 * @}
mbed_official 354:e67efb2aab0e 219 */
mbed_official 354:e67efb2aab0e 220
mbed_official 354:e67efb2aab0e 221 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
mbed_official 354:e67efb2aab0e 222 * @brief IO operation functions
mbed_official 354:e67efb2aab0e 223 *
mbed_official 354:e67efb2aab0e 224 @verbatim
mbed_official 354:e67efb2aab0e 225 ===============================================================================
mbed_official 354:e67efb2aab0e 226 ##### IO operation functions #####
mbed_official 354:e67efb2aab0e 227 ===============================================================================
mbed_official 354:e67efb2aab0e 228 [..] This section provides functions allowing to:
mbed_official 354:e67efb2aab0e 229 (+) Start the IWDG.
mbed_official 354:e67efb2aab0e 230 (+) Refresh the IWDG.
mbed_official 354:e67efb2aab0e 231
mbed_official 354:e67efb2aab0e 232 @endverbatim
mbed_official 354:e67efb2aab0e 233 * @{
mbed_official 354:e67efb2aab0e 234 */
mbed_official 354:e67efb2aab0e 235
mbed_official 354:e67efb2aab0e 236 /**
mbed_official 354:e67efb2aab0e 237 * @brief Starts the IWDG.
mbed_official 354:e67efb2aab0e 238 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 239 * the configuration information for the specified IWDG module.
mbed_official 354:e67efb2aab0e 240 * @retval HAL status
mbed_official 354:e67efb2aab0e 241 */
mbed_official 354:e67efb2aab0e 242 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 354:e67efb2aab0e 243 {
mbed_official 354:e67efb2aab0e 244 /* Process Locked */
mbed_official 354:e67efb2aab0e 245 __HAL_LOCK(hiwdg);
mbed_official 354:e67efb2aab0e 246
mbed_official 354:e67efb2aab0e 247 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 248 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 249
mbed_official 354:e67efb2aab0e 250 /* Start the IWDG peripheral */
mbed_official 354:e67efb2aab0e 251 __HAL_IWDG_START(hiwdg);
mbed_official 354:e67efb2aab0e 252
mbed_official 354:e67efb2aab0e 253 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 354:e67efb2aab0e 254 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 354:e67efb2aab0e 255
mbed_official 354:e67efb2aab0e 256 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 257 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 258
mbed_official 354:e67efb2aab0e 259 /* Process Unlocked */
mbed_official 354:e67efb2aab0e 260 __HAL_UNLOCK(hiwdg);
mbed_official 354:e67efb2aab0e 261
mbed_official 354:e67efb2aab0e 262 /* Return function status */
mbed_official 354:e67efb2aab0e 263 return HAL_OK;
mbed_official 354:e67efb2aab0e 264 }
mbed_official 354:e67efb2aab0e 265
mbed_official 354:e67efb2aab0e 266 /**
mbed_official 354:e67efb2aab0e 267 * @brief Refreshes the IWDG.
mbed_official 354:e67efb2aab0e 268 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 269 * the configuration information for the specified IWDG module.
mbed_official 354:e67efb2aab0e 270 * @retval HAL status
mbed_official 354:e67efb2aab0e 271 */
mbed_official 354:e67efb2aab0e 272 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 354:e67efb2aab0e 273 {
mbed_official 354:e67efb2aab0e 274 uint32_t tickstart = 0;
mbed_official 354:e67efb2aab0e 275
mbed_official 354:e67efb2aab0e 276 /* Process Locked */
mbed_official 354:e67efb2aab0e 277 __HAL_LOCK(hiwdg);
mbed_official 354:e67efb2aab0e 278
mbed_official 354:e67efb2aab0e 279 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 280 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 281
mbed_official 354:e67efb2aab0e 282 tickstart = HAL_GetTick();
mbed_official 354:e67efb2aab0e 283
mbed_official 354:e67efb2aab0e 284 /* Wait until RVU flag is RESET */
mbed_official 354:e67efb2aab0e 285 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 354:e67efb2aab0e 286 {
mbed_official 354:e67efb2aab0e 287 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 354:e67efb2aab0e 288 {
mbed_official 354:e67efb2aab0e 289 /* Set IWDG state */
mbed_official 354:e67efb2aab0e 290 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 354:e67efb2aab0e 291
mbed_official 354:e67efb2aab0e 292 /* Process unlocked */
mbed_official 354:e67efb2aab0e 293 __HAL_UNLOCK(hiwdg);
mbed_official 354:e67efb2aab0e 294
mbed_official 354:e67efb2aab0e 295 return HAL_TIMEOUT;
mbed_official 354:e67efb2aab0e 296 }
mbed_official 354:e67efb2aab0e 297 }
mbed_official 354:e67efb2aab0e 298
mbed_official 354:e67efb2aab0e 299 /* Reload IWDG counter with value defined in the reload register */
mbed_official 354:e67efb2aab0e 300 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 354:e67efb2aab0e 301
mbed_official 354:e67efb2aab0e 302 /* Change IWDG peripheral state */
mbed_official 354:e67efb2aab0e 303 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 304
mbed_official 354:e67efb2aab0e 305 /* Process Unlocked */
mbed_official 354:e67efb2aab0e 306 __HAL_UNLOCK(hiwdg);
mbed_official 354:e67efb2aab0e 307
mbed_official 354:e67efb2aab0e 308 /* Return function status */
mbed_official 354:e67efb2aab0e 309 return HAL_OK;
mbed_official 354:e67efb2aab0e 310 }
mbed_official 354:e67efb2aab0e 311
mbed_official 354:e67efb2aab0e 312 /**
mbed_official 354:e67efb2aab0e 313 * @}
mbed_official 354:e67efb2aab0e 314 */
mbed_official 354:e67efb2aab0e 315
mbed_official 354:e67efb2aab0e 316 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 354:e67efb2aab0e 317 * @brief Peripheral State functions.
mbed_official 354:e67efb2aab0e 318 *
mbed_official 354:e67efb2aab0e 319 @verbatim
mbed_official 354:e67efb2aab0e 320 ===============================================================================
mbed_official 354:e67efb2aab0e 321 ##### Peripheral State functions #####
mbed_official 354:e67efb2aab0e 322 ===============================================================================
mbed_official 354:e67efb2aab0e 323 [..]
mbed_official 354:e67efb2aab0e 324 This subsection permits to get in run-time the status of the peripheral
mbed_official 354:e67efb2aab0e 325 and the data flow.
mbed_official 354:e67efb2aab0e 326
mbed_official 354:e67efb2aab0e 327 @endverbatim
mbed_official 354:e67efb2aab0e 328 * @{
mbed_official 354:e67efb2aab0e 329 */
mbed_official 354:e67efb2aab0e 330
mbed_official 354:e67efb2aab0e 331 /**
mbed_official 354:e67efb2aab0e 332 * @brief Returns the IWDG state.
mbed_official 354:e67efb2aab0e 333 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 334 * the configuration information for the specified IWDG module.
mbed_official 354:e67efb2aab0e 335 * @retval HAL state
mbed_official 354:e67efb2aab0e 336 */
mbed_official 354:e67efb2aab0e 337 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 354:e67efb2aab0e 338 {
mbed_official 354:e67efb2aab0e 339 return hiwdg->State;
mbed_official 354:e67efb2aab0e 340 }
mbed_official 354:e67efb2aab0e 341
mbed_official 354:e67efb2aab0e 342 /**
mbed_official 354:e67efb2aab0e 343 * @}
mbed_official 354:e67efb2aab0e 344 */
mbed_official 354:e67efb2aab0e 345
mbed_official 354:e67efb2aab0e 346 /**
mbed_official 354:e67efb2aab0e 347 * @}
mbed_official 354:e67efb2aab0e 348 */
mbed_official 354:e67efb2aab0e 349
mbed_official 354:e67efb2aab0e 350 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 354:e67efb2aab0e 351 /**
mbed_official 354:e67efb2aab0e 352 * @}
mbed_official 354:e67efb2aab0e 353 */
mbed_official 354:e67efb2aab0e 354
mbed_official 354:e67efb2aab0e 355 /**
mbed_official 354:e67efb2aab0e 356 * @}
mbed_official 354:e67efb2aab0e 357 */
mbed_official 354:e67efb2aab0e 358
mbed_official 354:e67efb2aab0e 359 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
mbed_official 354:e67efb2aab0e 360