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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F4/stm32f4xx_hal_wwdg.c@581:39197bcd20f2, 2015-07-02 (annotated)

Committer:
mbed_official
Date:
Thu Jul 02 16:30:08 2015 +0100
Revision:
581:39197bcd20f2
Parent:
532:fe11edbda85c
Child:
613:bc40b8d2aec4
Synchronized with git revision ae2d3cdffe70184eb8736d94f76c45c93f4b7724



Full URL: https://github.com/mbedmicro/mbed/commit/ae2d3cdffe70184eb8736d94f76c45c93f4b7724/



Make it possible to build the core mbed library with yotta

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UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /**
mbed_official 87:085cde657901 2 ******************************************************************************
mbed_official 87:085cde657901 3 * @file stm32f4xx_hal_wwdg.c
mbed_official 87:085cde657901 4 * @author MCD Application Team
mbed_official 532:fe11edbda85c 5 * @version V1.3.0
mbed_official 532:fe11edbda85c 6 * @date 09-March-2015
mbed_official 87:085cde657901 7 * @brief WWDG HAL module driver.
mbed_official 87:085cde657901 8 * This file provides firmware functions to manage the following
mbed_official 87:085cde657901 9 * functionalities of the Window Watchdog (WWDG) peripheral:
mbed_official 87:085cde657901 10 * + Initialization and de-initialization functions
mbed_official 87:085cde657901 11 * + IO operation functions
mbed_official 87:085cde657901 12 * + Peripheral State functions
mbed_official 87:085cde657901 13 @verbatim
mbed_official 87:085cde657901 14 ==============================================================================
mbed_official 87:085cde657901 15 ##### WWDG specific features #####
mbed_official 87:085cde657901 16 ==============================================================================
mbed_official 87:085cde657901 17 [..]
mbed_official 87:085cde657901 18 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 87:085cde657901 19 time period, unless the program refreshes the counter (downcounter)
mbed_official 87:085cde657901 20 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 87:085cde657901 21 value rolls over from 0x40 to 0x3F).
mbed_official 87:085cde657901 22
mbed_official 87:085cde657901 23 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 87:085cde657901 24 before the counter has reached the refresh window value. This
mbed_official 87:085cde657901 25 implies that the counter must be refreshed in a limited window.
mbed_official 87:085cde657901 26 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 87:085cde657901 27 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 87:085cde657901 28 reset occurs.
mbed_official 87:085cde657901 29 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 87:085cde657901 30 by a programmable prescaler.
mbed_official 87:085cde657901 31 (+) WWDG clock (Hz) = PCLK1 / (4096 * Prescaler)
mbed_official 87:085cde657901 32 (+) WWDG timeout (mS) = 1000 * Counter / WWDG clock
mbed_official 87:085cde657901 33 (+) WWDG Counter refresh is allowed between the following limits :
mbed_official 87:085cde657901 34 (++) min time (mS) = 1000 * (Counter – Window) / WWDG clock
mbed_official 87:085cde657901 35 (++) max time (mS) = 1000 * (Counter – 0x40) / WWDG clock
mbed_official 87:085cde657901 36
mbed_official 87:085cde657901 37 (+) Min-max timeout value at 50 MHz(PCLK1): 81.9 us / 41.9 ms
mbed_official 87:085cde657901 38
mbed_official 87:085cde657901 39
mbed_official 87:085cde657901 40 ##### How to use this driver #####
mbed_official 87:085cde657901 41 ==============================================================================
mbed_official 87:085cde657901 42 [..]
mbed_official 532:fe11edbda85c 43 (+) Enable WWDG APB1 clock using __HAL_RCC_WWDG_CLK_ENABLE().
mbed_official 87:085cde657901 44 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 87:085cde657901 45 using HAL_WWDG_Init() function.
mbed_official 87:085cde657901 46 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 87:085cde657901 47 When the WWDG is enabled the counter value should be configured to
mbed_official 87:085cde657901 48 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 87:085cde657901 49 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 87:085cde657901 50 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 87:085cde657901 51 HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback is executed and user can
mbed_official 87:085cde657901 52 add his own code by customization of function pointer HAL_WWDG_WakeupCallback
mbed_official 87:085cde657901 53 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 87:085cde657901 54 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 87:085cde657901 55 intervals during normal operation to prevent an MCU reset, using
mbed_official 87:085cde657901 56 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 87:085cde657901 57 the counter is lower than the refresh window value already programmed.
mbed_official 87:085cde657901 58
mbed_official 87:085cde657901 59 *** WWDG HAL driver macros list ***
mbed_official 87:085cde657901 60 ==================================
mbed_official 87:085cde657901 61 [..]
mbed_official 87:085cde657901 62 Below the list of most used macros in WWDG HAL driver.
mbed_official 87:085cde657901 63
mbed_official 87:085cde657901 64 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 369:2e96f1b71984 65 (+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 369:2e96f1b71984 66 (+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 532:fe11edbda85c 67 (+) __HAL_WWDG_ENABLE_IT: Enables the WWDG early wake-up interrupt
mbed_official 87:085cde657901 68
mbed_official 87:085cde657901 69 @endverbatim
mbed_official 87:085cde657901 70 ******************************************************************************
mbed_official 87:085cde657901 71 * @attention
mbed_official 87:085cde657901 72 *
mbed_official 532:fe11edbda85c 73 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 87:085cde657901 74 *
mbed_official 87:085cde657901 75 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 87:085cde657901 76 * are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 77 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 78 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 79 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 80 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 81 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 82 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 83 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 84 * without specific prior written permission.
mbed_official 87:085cde657901 85 *
mbed_official 87:085cde657901 86 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 87 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 88 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 89 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 90 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 91 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 93 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 94 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 95 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 96 *
mbed_official 87:085cde657901 97 ******************************************************************************
mbed_official 87:085cde657901 98 */
mbed_official 87:085cde657901 99
mbed_official 87:085cde657901 100 /* Includes ------------------------------------------------------------------*/
mbed_official 87:085cde657901 101 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 102
mbed_official 87:085cde657901 103 /** @addtogroup STM32F4xx_HAL_Driver
mbed_official 87:085cde657901 104 * @{
mbed_official 87:085cde657901 105 */
mbed_official 87:085cde657901 106
mbed_official 532:fe11edbda85c 107 /** @defgroup WWDG WWDG
mbed_official 87:085cde657901 108 * @brief WWDG HAL module driver.
mbed_official 87:085cde657901 109 * @{
mbed_official 87:085cde657901 110 */
mbed_official 87:085cde657901 111
mbed_official 87:085cde657901 112 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 87:085cde657901 113
mbed_official 87:085cde657901 114 /* Private typedef -----------------------------------------------------------*/
mbed_official 87:085cde657901 115 /* Private define ------------------------------------------------------------*/
mbed_official 87:085cde657901 116 /* Private macro -------------------------------------------------------------*/
mbed_official 87:085cde657901 117 /* Private variables ---------------------------------------------------------*/
mbed_official 87:085cde657901 118 /* Private function prototypes -----------------------------------------------*/
mbed_official 532:fe11edbda85c 119 /* Exported functions --------------------------------------------------------*/
mbed_official 532:fe11edbda85c 120 /** @defgroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 87:085cde657901 121 * @{
mbed_official 87:085cde657901 122 */
mbed_official 87:085cde657901 123
mbed_official 532:fe11edbda85c 124 /** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 87:085cde657901 125 * @brief Initialization and Configuration functions.
mbed_official 87:085cde657901 126 *
mbed_official 87:085cde657901 127 @verbatim
mbed_official 87:085cde657901 128 ==============================================================================
mbed_official 87:085cde657901 129 ##### Initialization and de-initialization functions #####
mbed_official 87:085cde657901 130 ==============================================================================
mbed_official 87:085cde657901 131 [..]
mbed_official 87:085cde657901 132 This section provides functions allowing to:
mbed_official 87:085cde657901 133 (+) Initialize the WWDG according to the specified parameters
mbed_official 87:085cde657901 134 in the WWDG_InitTypeDef and create the associated handle
mbed_official 87:085cde657901 135 (+) DeInitialize the WWDG peripheral
mbed_official 87:085cde657901 136 (+) Initialize the WWDG MSP
mbed_official 87:085cde657901 137 (+) DeInitialize the WWDG MSP
mbed_official 87:085cde657901 138
mbed_official 87:085cde657901 139 @endverbatim
mbed_official 87:085cde657901 140 * @{
mbed_official 87:085cde657901 141 */
mbed_official 87:085cde657901 142
mbed_official 87:085cde657901 143 /**
mbed_official 87:085cde657901 144 * @brief Initializes the WWDG according to the specified
mbed_official 87:085cde657901 145 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 226:b062af740e40 146 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 147 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 148 * @retval HAL status
mbed_official 87:085cde657901 149 */
mbed_official 87:085cde657901 150 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 151 {
mbed_official 87:085cde657901 152 /* Check the WWDG handle allocation */
mbed_official 369:2e96f1b71984 153 if(hwwdg == HAL_NULL)
mbed_official 87:085cde657901 154 {
mbed_official 87:085cde657901 155 return HAL_ERROR;
mbed_official 87:085cde657901 156 }
mbed_official 369:2e96f1b71984 157
mbed_official 87:085cde657901 158 /* Check the parameters */
mbed_official 369:2e96f1b71984 159 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 87:085cde657901 160 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 87:085cde657901 161 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 87:085cde657901 162 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 87:085cde657901 163
mbed_official 87:085cde657901 164 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 87:085cde657901 165 {
mbed_official 532:fe11edbda85c 166 /* Allocate lock resource and initialize it */
mbed_official 532:fe11edbda85c 167 hwwdg->Lock = HAL_UNLOCKED;
mbed_official 87:085cde657901 168 /* Init the low level hardware */
mbed_official 87:085cde657901 169 HAL_WWDG_MspInit(hwwdg);
mbed_official 87:085cde657901 170 }
mbed_official 87:085cde657901 171
mbed_official 87:085cde657901 172 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 173 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 174
mbed_official 87:085cde657901 175 /* Set WWDG Prescaler and Window */
mbed_official 369:2e96f1b71984 176 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 87:085cde657901 177 /* Set WWDG Counter */
mbed_official 369:2e96f1b71984 178 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 369:2e96f1b71984 179
mbed_official 87:085cde657901 180 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 181 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 182
mbed_official 87:085cde657901 183 /* Return function status */
mbed_official 87:085cde657901 184 return HAL_OK;
mbed_official 87:085cde657901 185 }
mbed_official 87:085cde657901 186
mbed_official 87:085cde657901 187 /**
mbed_official 87:085cde657901 188 * @brief DeInitializes the WWDG peripheral.
mbed_official 226:b062af740e40 189 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 190 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 191 * @retval HAL status
mbed_official 87:085cde657901 192 */
mbed_official 87:085cde657901 193 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 369:2e96f1b71984 194 {
mbed_official 369:2e96f1b71984 195 /* Check the WWDG handle allocation */
mbed_official 369:2e96f1b71984 196 if(hwwdg == HAL_NULL)
mbed_official 369:2e96f1b71984 197 {
mbed_official 369:2e96f1b71984 198 return HAL_ERROR;
mbed_official 369:2e96f1b71984 199 }
mbed_official 369:2e96f1b71984 200
mbed_official 369:2e96f1b71984 201 /* Check the parameters */
mbed_official 369:2e96f1b71984 202 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 369:2e96f1b71984 203
mbed_official 87:085cde657901 204 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 205 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 206
mbed_official 87:085cde657901 207 /* DeInit the low level hardware */
mbed_official 87:085cde657901 208 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 87:085cde657901 209
mbed_official 87:085cde657901 210 /* Reset WWDG Control register */
mbed_official 87:085cde657901 211 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 87:085cde657901 212
mbed_official 87:085cde657901 213 /* Reset WWDG Configuration register */
mbed_official 87:085cde657901 214 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 87:085cde657901 215
mbed_official 87:085cde657901 216 /* Reset WWDG Status register */
mbed_official 87:085cde657901 217 hwwdg->Instance->SR = 0;
mbed_official 87:085cde657901 218
mbed_official 87:085cde657901 219 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 220 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 87:085cde657901 221
mbed_official 106:ced8cbb51063 222 /* Release Lock */
mbed_official 106:ced8cbb51063 223 __HAL_UNLOCK(hwwdg);
mbed_official 106:ced8cbb51063 224
mbed_official 87:085cde657901 225 /* Return function status */
mbed_official 87:085cde657901 226 return HAL_OK;
mbed_official 87:085cde657901 227 }
mbed_official 87:085cde657901 228
mbed_official 87:085cde657901 229 /**
mbed_official 87:085cde657901 230 * @brief Initializes the WWDG MSP.
mbed_official 226:b062af740e40 231 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 232 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 233 * @retval None
mbed_official 87:085cde657901 234 */
mbed_official 87:085cde657901 235 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 236 {
mbed_official 87:085cde657901 237 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 238 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 87:085cde657901 239 */
mbed_official 87:085cde657901 240 }
mbed_official 87:085cde657901 241
mbed_official 87:085cde657901 242 /**
mbed_official 87:085cde657901 243 * @brief DeInitializes the WWDG MSP.
mbed_official 226:b062af740e40 244 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 245 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 246 * @retval None
mbed_official 87:085cde657901 247 */
mbed_official 87:085cde657901 248 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 249 {
mbed_official 87:085cde657901 250 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 251 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 87:085cde657901 252 */
mbed_official 87:085cde657901 253 }
mbed_official 87:085cde657901 254
mbed_official 87:085cde657901 255 /**
mbed_official 87:085cde657901 256 * @}
mbed_official 87:085cde657901 257 */
mbed_official 87:085cde657901 258
mbed_official 532:fe11edbda85c 259 /** @defgroup WWDG_Exported_Functions_Group2 IO operation functions
mbed_official 87:085cde657901 260 * @brief IO operation functions
mbed_official 87:085cde657901 261 *
mbed_official 87:085cde657901 262 @verbatim
mbed_official 87:085cde657901 263 ==============================================================================
mbed_official 87:085cde657901 264 ##### IO operation functions #####
mbed_official 87:085cde657901 265 ==============================================================================
mbed_official 87:085cde657901 266 [..]
mbed_official 87:085cde657901 267 This section provides functions allowing to:
mbed_official 87:085cde657901 268 (+) Start the WWDG.
mbed_official 87:085cde657901 269 (+) Refresh the WWDG.
mbed_official 87:085cde657901 270 (+) Handle WWDG interrupt request.
mbed_official 87:085cde657901 271
mbed_official 87:085cde657901 272 @endverbatim
mbed_official 87:085cde657901 273 * @{
mbed_official 87:085cde657901 274 */
mbed_official 87:085cde657901 275
mbed_official 87:085cde657901 276 /**
mbed_official 87:085cde657901 277 * @brief Starts the WWDG.
mbed_official 226:b062af740e40 278 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 279 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 280 * @retval HAL status
mbed_official 87:085cde657901 281 */
mbed_official 87:085cde657901 282 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 283 {
mbed_official 87:085cde657901 284 /* Process Locked */
mbed_official 87:085cde657901 285 __HAL_LOCK(hwwdg);
mbed_official 87:085cde657901 286
mbed_official 87:085cde657901 287 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 288 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 289
mbed_official 87:085cde657901 290 /* Enable the peripheral */
mbed_official 87:085cde657901 291 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 87:085cde657901 292
mbed_official 87:085cde657901 293 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 294 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 295
mbed_official 87:085cde657901 296 /* Process Unlocked */
mbed_official 87:085cde657901 297 __HAL_UNLOCK(hwwdg);
mbed_official 87:085cde657901 298
mbed_official 87:085cde657901 299 /* Return function status */
mbed_official 87:085cde657901 300 return HAL_OK;
mbed_official 87:085cde657901 301 }
mbed_official 87:085cde657901 302
mbed_official 87:085cde657901 303 /**
mbed_official 87:085cde657901 304 * @brief Starts the WWDG with interrupt enabled.
mbed_official 226:b062af740e40 305 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 306 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 307 * @retval HAL status
mbed_official 87:085cde657901 308 */
mbed_official 87:085cde657901 309 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 369:2e96f1b71984 310 {
mbed_official 87:085cde657901 311 /* Process Locked */
mbed_official 87:085cde657901 312 __HAL_LOCK(hwwdg);
mbed_official 369:2e96f1b71984 313
mbed_official 87:085cde657901 314 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 315 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 369:2e96f1b71984 316
mbed_official 87:085cde657901 317 /* Enable the Early Wakeup Interrupt */
mbed_official 532:fe11edbda85c 318 __HAL_WWDG_ENABLE_IT(hwwdg, WWDG_IT_EWI);
mbed_official 87:085cde657901 319
mbed_official 87:085cde657901 320 /* Enable the peripheral */
mbed_official 87:085cde657901 321 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 369:2e96f1b71984 322
mbed_official 87:085cde657901 323 /* Return function status */
mbed_official 87:085cde657901 324 return HAL_OK;
mbed_official 87:085cde657901 325 }
mbed_official 87:085cde657901 326
mbed_official 87:085cde657901 327 /**
mbed_official 87:085cde657901 328 * @brief Refreshes the WWDG.
mbed_official 226:b062af740e40 329 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 330 * the configuration information for the specified WWDG module.
mbed_official 369:2e96f1b71984 331 * @param Counter: value of counter to put in WWDG counter
mbed_official 87:085cde657901 332 * @retval HAL status
mbed_official 87:085cde657901 333 */
mbed_official 87:085cde657901 334 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 87:085cde657901 335 {
mbed_official 87:085cde657901 336 /* Process Locked */
mbed_official 87:085cde657901 337 __HAL_LOCK(hwwdg);
mbed_official 87:085cde657901 338
mbed_official 87:085cde657901 339 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 340 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 341
mbed_official 87:085cde657901 342 /* Check the parameters */
mbed_official 87:085cde657901 343 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 87:085cde657901 344
mbed_official 87:085cde657901 345 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 369:2e96f1b71984 346 MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
mbed_official 87:085cde657901 347
mbed_official 87:085cde657901 348 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 349 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 350
mbed_official 87:085cde657901 351 /* Process Unlocked */
mbed_official 87:085cde657901 352 __HAL_UNLOCK(hwwdg);
mbed_official 87:085cde657901 353
mbed_official 87:085cde657901 354 /* Return function status */
mbed_official 87:085cde657901 355 return HAL_OK;
mbed_official 87:085cde657901 356 }
mbed_official 87:085cde657901 357
mbed_official 87:085cde657901 358 /**
mbed_official 87:085cde657901 359 * @brief Handles WWDG interrupt request.
mbed_official 87:085cde657901 360 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 87:085cde657901 361 * or data logging must be performed before the actual reset is generated.
mbed_official 87:085cde657901 362 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 87:085cde657901 363 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 87:085cde657901 364 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 87:085cde657901 365 * be used to trigger specific actions (such as communications or data
mbed_official 87:085cde657901 366 * logging), before resetting the device.
mbed_official 226:b062af740e40 367 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 368 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 369 * @retval None
mbed_official 87:085cde657901 370 */
mbed_official 87:085cde657901 371 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 372 {
mbed_official 532:fe11edbda85c 373 /* Check if Early Wakeup Interrupt is enable */
mbed_official 532:fe11edbda85c 374 if(__HAL_WWDG_GET_IT_SOURCE(hwwdg, WWDG_IT_EWI) != RESET)
mbed_official 87:085cde657901 375 {
mbed_official 532:fe11edbda85c 376 /* Check if WWDG Early Wakeup Interrupt occurred */
mbed_official 532:fe11edbda85c 377 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 532:fe11edbda85c 378 {
mbed_official 532:fe11edbda85c 379 /* Early Wakeup callback */
mbed_official 532:fe11edbda85c 380 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 532:fe11edbda85c 381
mbed_official 532:fe11edbda85c 382 /* Change WWDG peripheral state */
mbed_official 532:fe11edbda85c 383 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 532:fe11edbda85c 384
mbed_official 532:fe11edbda85c 385 /* Clear the WWDG Early Wakeup flag */
mbed_official 532:fe11edbda85c 386 __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
mbed_official 532:fe11edbda85c 387
mbed_official 532:fe11edbda85c 388 /* Process Unlocked */
mbed_official 532:fe11edbda85c 389 __HAL_UNLOCK(hwwdg);
mbed_official 532:fe11edbda85c 390 }
mbed_official 87:085cde657901 391 }
mbed_official 87:085cde657901 392 }
mbed_official 87:085cde657901 393
mbed_official 87:085cde657901 394 /**
mbed_official 87:085cde657901 395 * @brief Early Wakeup WWDG callback.
mbed_official 226:b062af740e40 396 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 397 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 398 * @retval None
mbed_official 87:085cde657901 399 */
mbed_official 87:085cde657901 400 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 87:085cde657901 401 {
mbed_official 87:085cde657901 402 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 403 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 87:085cde657901 404 */
mbed_official 87:085cde657901 405 }
mbed_official 87:085cde657901 406
mbed_official 87:085cde657901 407 /**
mbed_official 87:085cde657901 408 * @}
mbed_official 87:085cde657901 409 */
mbed_official 87:085cde657901 410
mbed_official 532:fe11edbda85c 411 /** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 87:085cde657901 412 * @brief Peripheral State functions.
mbed_official 87:085cde657901 413 *
mbed_official 87:085cde657901 414 @verbatim
mbed_official 87:085cde657901 415 ==============================================================================
mbed_official 87:085cde657901 416 ##### Peripheral State functions #####
mbed_official 87:085cde657901 417 ==============================================================================
mbed_official 87:085cde657901 418 [..]
mbed_official 87:085cde657901 419 This subsection permits to get in run-time the status of the peripheral
mbed_official 87:085cde657901 420 and the data flow.
mbed_official 87:085cde657901 421
mbed_official 87:085cde657901 422 @endverbatim
mbed_official 87:085cde657901 423 * @{
mbed_official 87:085cde657901 424 */
mbed_official 87:085cde657901 425
mbed_official 87:085cde657901 426 /**
mbed_official 87:085cde657901 427 * @brief Returns the WWDG state.
mbed_official 226:b062af740e40 428 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 226:b062af740e40 429 * the configuration information for the specified WWDG module.
mbed_official 87:085cde657901 430 * @retval HAL state
mbed_official 87:085cde657901 431 */
mbed_official 87:085cde657901 432 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 433 {
mbed_official 87:085cde657901 434 return hwwdg->State;
mbed_official 87:085cde657901 435 }
mbed_official 87:085cde657901 436
mbed_official 87:085cde657901 437 /**
mbed_official 87:085cde657901 438 * @}
mbed_official 87:085cde657901 439 */
mbed_official 87:085cde657901 440
mbed_official 87:085cde657901 441 /**
mbed_official 87:085cde657901 442 * @}
mbed_official 87:085cde657901 443 */
mbed_official 87:085cde657901 444
mbed_official 87:085cde657901 445 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 87:085cde657901 446 /**
mbed_official 87:085cde657901 447 * @}
mbed_official 87:085cde657901 448 */
mbed_official 87:085cde657901 449
mbed_official 87:085cde657901 450 /**
mbed_official 87:085cde657901 451 * @}
mbed_official 87:085cde657901 452 */
mbed_official 87:085cde657901 453
mbed_official 87:085cde657901 454 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/