sai kiran / mbed-src

Watchdog Timer

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F3/stm32f3xx_hal_wwdg.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_wwdg.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 WWDG 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 Window Watchdog (WWDG) peripheral:
mbed_official 237:f3da66175598 11 * + Initialization/de-initialization functions
mbed_official 237:f3da66175598 12 * + I/O 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 ##### WWDG specific features #####
mbed_official 237:f3da66175598 18 ==============================================================================
mbed_official 237:f3da66175598 19 [..] Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 237:f3da66175598 20 time period, unless the program refreshes the counter (downcounter)
mbed_official 237:f3da66175598 21 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 237:f3da66175598 22 value rolls over from 0x40 to 0x3F).
mbed_official 237:f3da66175598 23
mbed_official 237:f3da66175598 24 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 237:f3da66175598 25 before the counter has reached the refresh window value. This
mbed_official 237:f3da66175598 26 implies that the counter must be refreshed in a limited window.
mbed_official 237:f3da66175598 27 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 237:f3da66175598 28 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 237:f3da66175598 29 reset occurs.
mbed_official 237:f3da66175598 30 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 237:f3da66175598 31 by a programmable prescaler.
mbed_official 237:f3da66175598 32 (+) WWDG counter clock = PCLK1 / Prescaler
mbed_official 237:f3da66175598 33 WWDG timeout = (WWDG counter clock) * (counter value)
mbed_official 237:f3da66175598 34 (+) Min-max timeout value @42 MHz(PCLK1): ~97.5 us / ~49.9 ms
mbed_official 237:f3da66175598 35
mbed_official 237:f3da66175598 36 ##### How to use this driver #####
mbed_official 237:f3da66175598 37 ==============================================================================
mbed_official 237:f3da66175598 38 [..]
mbed_official 237:f3da66175598 39 (+) Enable WWDG APB1 clock using __WWDG_CLK_ENABLE().
mbed_official 237:f3da66175598 40 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 237:f3da66175598 41 using HAL_WWDG_Init() function.
mbed_official 237:f3da66175598 42 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 237:f3da66175598 43 When the WWDG is enabled the counter value should be configured to
mbed_official 237:f3da66175598 44 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 237:f3da66175598 45 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 237:f3da66175598 46 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 237:f3da66175598 47 HAL_WWDG_Start_IT().
mbed_official 237:f3da66175598 48 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 237:f3da66175598 49 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 237:f3da66175598 50 intervals during normal operation to prevent an MCU reset, using
mbed_official 237:f3da66175598 51 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 237:f3da66175598 52 the counter is lower than the refresh window value already programmed.
mbed_official 237:f3da66175598 53
mbed_official 237:f3da66175598 54 @endverbatim
mbed_official 237:f3da66175598 55 ******************************************************************************
mbed_official 237:f3da66175598 56 * @attention
mbed_official 237:f3da66175598 57 *
mbed_official 635:ac7d6880524d 58 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 237:f3da66175598 59 *
mbed_official 237:f3da66175598 60 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 237:f3da66175598 61 * are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 62 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 63 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 64 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 65 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 66 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 67 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 68 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 69 * without specific prior written permission.
mbed_official 237:f3da66175598 70 *
mbed_official 237:f3da66175598 71 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 72 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 73 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 74 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 75 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 76 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 77 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 78 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 79 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 80 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 81 *
mbed_official 237:f3da66175598 82 ******************************************************************************
mbed_official 237:f3da66175598 83 */
mbed_official 237:f3da66175598 84
mbed_official 237:f3da66175598 85 /* Includes ------------------------------------------------------------------*/
mbed_official 237:f3da66175598 86 #include "stm32f3xx_hal.h"
mbed_official 237:f3da66175598 87
mbed_official 237:f3da66175598 88 /** @addtogroup STM32F3xx_HAL_Driver
mbed_official 237:f3da66175598 89 * @{
mbed_official 237:f3da66175598 90 */
mbed_official 237:f3da66175598 91
mbed_official 375:3d36234a1087 92 /** @defgroup WWDG WWDG HAL module driver.
mbed_official 237:f3da66175598 93 * @brief WWDG HAL module driver.
mbed_official 237:f3da66175598 94 * @{
mbed_official 237:f3da66175598 95 */
mbed_official 237:f3da66175598 96
mbed_official 237:f3da66175598 97 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 237:f3da66175598 98
mbed_official 237:f3da66175598 99 /* Private typedef -----------------------------------------------------------*/
mbed_official 237:f3da66175598 100 /* Private define ------------------------------------------------------------*/
mbed_official 237:f3da66175598 101 /* Private macro -------------------------------------------------------------*/
mbed_official 237:f3da66175598 102 /* Private variables ---------------------------------------------------------*/
mbed_official 237:f3da66175598 103 /* Private function prototypes -----------------------------------------------*/
mbed_official 375:3d36234a1087 104 /* Exported functions ---------------------------------------------------------*/
mbed_official 237:f3da66175598 105
mbed_official 375:3d36234a1087 106 /** @defgroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 237:f3da66175598 107 * @{
mbed_official 237:f3da66175598 108 */
mbed_official 237:f3da66175598 109
mbed_official 375:3d36234a1087 110 /** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 237:f3da66175598 111 * @brief Initialization and Configuration functions.
mbed_official 237:f3da66175598 112 *
mbed_official 237:f3da66175598 113 @verbatim
mbed_official 237:f3da66175598 114 ===============================================================================
mbed_official 237:f3da66175598 115 ##### Initialization/de-initialization functions #####
mbed_official 237:f3da66175598 116 ===============================================================================
mbed_official 237:f3da66175598 117 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 118 (+) Initialize the WWDG according to the specified parameters
mbed_official 237:f3da66175598 119 in the WWDG_InitTypeDef and create the associated handle
mbed_official 237:f3da66175598 120 (+) DeInitialize the WWDG peripheral
mbed_official 237:f3da66175598 121 (+) Initialize the WWDG MSP
mbed_official 237:f3da66175598 122 (+) DeInitialize the WWDG MSP
mbed_official 237:f3da66175598 123
mbed_official 237:f3da66175598 124 @endverbatim
mbed_official 237:f3da66175598 125 * @{
mbed_official 237:f3da66175598 126 */
mbed_official 237:f3da66175598 127
mbed_official 237:f3da66175598 128 /**
mbed_official 237:f3da66175598 129 * @brief Initializes the WWDG according to the specified
mbed_official 237:f3da66175598 130 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 237:f3da66175598 131 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 132 * @retval HAL status
mbed_official 237:f3da66175598 133 */
mbed_official 237:f3da66175598 134 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 135 {
mbed_official 237:f3da66175598 136 /* Check the WWDG handle allocation */
mbed_official 635:ac7d6880524d 137 if(hwwdg == HAL_NULL)
mbed_official 237:f3da66175598 138 {
mbed_official 237:f3da66175598 139 return HAL_ERROR;
mbed_official 237:f3da66175598 140 }
mbed_official 237:f3da66175598 141
mbed_official 237:f3da66175598 142 /* Check the parameters */
mbed_official 237:f3da66175598 143 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 237:f3da66175598 144 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 237:f3da66175598 145 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 237:f3da66175598 146 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 237:f3da66175598 147
mbed_official 237:f3da66175598 148 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 237:f3da66175598 149 {
mbed_official 237:f3da66175598 150 /* Init the low level hardware */
mbed_official 237:f3da66175598 151 HAL_WWDG_MspInit(hwwdg);
mbed_official 237:f3da66175598 152 }
mbed_official 237:f3da66175598 153
mbed_official 237:f3da66175598 154 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 155 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 156
mbed_official 237:f3da66175598 157 /* Set WWDG Prescaler and Window */
mbed_official 375:3d36234a1087 158 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 237:f3da66175598 159
mbed_official 237:f3da66175598 160 /* Set WWDG Counter */
mbed_official 375:3d36234a1087 161 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 237:f3da66175598 162
mbed_official 237:f3da66175598 163 /* Return function status */
mbed_official 237:f3da66175598 164 return HAL_OK;
mbed_official 237:f3da66175598 165 }
mbed_official 237:f3da66175598 166
mbed_official 237:f3da66175598 167 /**
mbed_official 237:f3da66175598 168 * @brief DeInitializes the WWDG peripheral.
mbed_official 237:f3da66175598 169 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 170 * @retval HAL status
mbed_official 237:f3da66175598 171 */
mbed_official 237:f3da66175598 172 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 173 {
mbed_official 237:f3da66175598 174 /* Check the parameters */
mbed_official 237:f3da66175598 175 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 237:f3da66175598 176
mbed_official 237:f3da66175598 177 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 178 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 179
mbed_official 237:f3da66175598 180 /* DeInit the low level hardware */
mbed_official 237:f3da66175598 181 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 237:f3da66175598 182
mbed_official 237:f3da66175598 183 /* Reset WWDG Control register */
mbed_official 237:f3da66175598 184 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 237:f3da66175598 185
mbed_official 237:f3da66175598 186 /* Reset WWDG Configuration register */
mbed_official 237:f3da66175598 187 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 237:f3da66175598 188
mbed_official 237:f3da66175598 189 /* Reset WWDG Status register */
mbed_official 237:f3da66175598 190 hwwdg->Instance->SR = 0;
mbed_official 237:f3da66175598 191
mbed_official 237:f3da66175598 192 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 193 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 237:f3da66175598 194
mbed_official 237:f3da66175598 195 /* Return function status */
mbed_official 237:f3da66175598 196 return HAL_OK;
mbed_official 237:f3da66175598 197 }
mbed_official 237:f3da66175598 198
mbed_official 237:f3da66175598 199 /**
mbed_official 237:f3da66175598 200 * @brief Initializes the WWDG MSP.
mbed_official 237:f3da66175598 201 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 202 * @retval None
mbed_official 237:f3da66175598 203 */
mbed_official 237:f3da66175598 204 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 205 {
mbed_official 237:f3da66175598 206 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 207 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 237:f3da66175598 208 */
mbed_official 237:f3da66175598 209 }
mbed_official 237:f3da66175598 210
mbed_official 237:f3da66175598 211 /**
mbed_official 237:f3da66175598 212 * @brief DeInitializes the WWDG MSP.
mbed_official 237:f3da66175598 213 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 214 * @retval None
mbed_official 237:f3da66175598 215 */
mbed_official 237:f3da66175598 216 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 217 {
mbed_official 237:f3da66175598 218 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 219 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 237:f3da66175598 220 */
mbed_official 237:f3da66175598 221 }
mbed_official 237:f3da66175598 222
mbed_official 237:f3da66175598 223 /**
mbed_official 237:f3da66175598 224 * @brief Early Wakeup WWDG callback.
mbed_official 237:f3da66175598 225 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 226 * @retval None
mbed_official 237:f3da66175598 227 */
mbed_official 237:f3da66175598 228 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 237:f3da66175598 229 {
mbed_official 237:f3da66175598 230 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 231 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 237:f3da66175598 232 */
mbed_official 237:f3da66175598 233 }
mbed_official 237:f3da66175598 234
mbed_official 237:f3da66175598 235 /**
mbed_official 237:f3da66175598 236 * @}
mbed_official 237:f3da66175598 237 */
mbed_official 237:f3da66175598 238
mbed_official 375:3d36234a1087 239 /** @defgroup WWDG_Exported_Functions_Group2 Input and Output operation functions
mbed_official 237:f3da66175598 240 * @brief I/O operation functions
mbed_official 237:f3da66175598 241 *
mbed_official 237:f3da66175598 242 @verbatim
mbed_official 237:f3da66175598 243 ===============================================================================
mbed_official 237:f3da66175598 244 ##### IO operation functions #####
mbed_official 237:f3da66175598 245 ===============================================================================
mbed_official 237:f3da66175598 246 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 247 (+) Start the WWDG.
mbed_official 237:f3da66175598 248 (+) Refresh the WWDG.
mbed_official 237:f3da66175598 249 (+) Handle WWDG interrupt request.
mbed_official 237:f3da66175598 250
mbed_official 237:f3da66175598 251 @endverbatim
mbed_official 237:f3da66175598 252 * @{
mbed_official 237:f3da66175598 253 */
mbed_official 237:f3da66175598 254
mbed_official 237:f3da66175598 255 /**
mbed_official 237:f3da66175598 256 * @brief Starts the WWDG
mbed_official 237:f3da66175598 257 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 258 * @retval HAL status
mbed_official 237:f3da66175598 259 */
mbed_official 237:f3da66175598 260 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 261 {
mbed_official 237:f3da66175598 262 /* Process locked */
mbed_official 237:f3da66175598 263 __HAL_LOCK(hwwdg);
mbed_official 375:3d36234a1087 264
mbed_official 237:f3da66175598 265 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 266 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 375:3d36234a1087 267
mbed_official 237:f3da66175598 268 /* Enable the Peripheral */
mbed_official 237:f3da66175598 269 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 237:f3da66175598 270
mbed_official 237:f3da66175598 271 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 272 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 375:3d36234a1087 273
mbed_official 237:f3da66175598 274 /* Process unlocked */
mbed_official 237:f3da66175598 275 __HAL_UNLOCK(hwwdg);
mbed_official 375:3d36234a1087 276
mbed_official 237:f3da66175598 277 /* Return function status */
mbed_official 237:f3da66175598 278 return HAL_OK;
mbed_official 237:f3da66175598 279 }
mbed_official 237:f3da66175598 280
mbed_official 237:f3da66175598 281 /**
mbed_official 237:f3da66175598 282 * @brief Starts the WWDG with interrupt enabled.
mbed_official 237:f3da66175598 283 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 284 * @retval HAL status
mbed_official 237:f3da66175598 285 */
mbed_official 237:f3da66175598 286 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 287 {
mbed_official 237:f3da66175598 288 /* Process locked */
mbed_official 237:f3da66175598 289 __HAL_LOCK(hwwdg);
mbed_official 375:3d36234a1087 290
mbed_official 237:f3da66175598 291 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 292 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 293
mbed_official 237:f3da66175598 294 /* Enable the Early Wakeup Interrupt */
mbed_official 237:f3da66175598 295 __HAL_WWDG_ENABLE_IT(WWDG_IT_EWI);
mbed_official 375:3d36234a1087 296
mbed_official 237:f3da66175598 297 /* Enable the Peripheral */
mbed_official 237:f3da66175598 298 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 375:3d36234a1087 299
mbed_official 237:f3da66175598 300 /* Return function status */
mbed_official 237:f3da66175598 301 return HAL_OK;
mbed_official 237:f3da66175598 302 }
mbed_official 237:f3da66175598 303
mbed_official 237:f3da66175598 304 /**
mbed_official 237:f3da66175598 305 * @brief Refreshes the WWDG.
mbed_official 237:f3da66175598 306 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 307 * @param Counter: Counter value to refresh WWDG with
mbed_official 237:f3da66175598 308 * @retval HAL status
mbed_official 237:f3da66175598 309 */
mbed_official 237:f3da66175598 310 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 237:f3da66175598 311 {
mbed_official 237:f3da66175598 312 /* Process locked */
mbed_official 237:f3da66175598 313 __HAL_LOCK(hwwdg);
mbed_official 237:f3da66175598 314
mbed_official 237:f3da66175598 315 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 316 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 317
mbed_official 237:f3da66175598 318 /* Check the parameters */
mbed_official 237:f3da66175598 319 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 237:f3da66175598 320
mbed_official 237:f3da66175598 321 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 237:f3da66175598 322 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, Counter);
mbed_official 237:f3da66175598 323
mbed_official 237:f3da66175598 324 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 325 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 326
mbed_official 237:f3da66175598 327 /* Process unlocked */
mbed_official 237:f3da66175598 328 __HAL_UNLOCK(hwwdg);
mbed_official 237:f3da66175598 329
mbed_official 237:f3da66175598 330 /* Return function status */
mbed_official 237:f3da66175598 331 return HAL_OK;
mbed_official 237:f3da66175598 332 }
mbed_official 237:f3da66175598 333
mbed_official 237:f3da66175598 334 /**
mbed_official 237:f3da66175598 335 * @brief Handles WWDG interrupt request.
mbed_official 237:f3da66175598 336 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 237:f3da66175598 337 * or data logging must be performed before the actual reset is generated.
mbed_official 237:f3da66175598 338 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 237:f3da66175598 339 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 237:f3da66175598 340 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 237:f3da66175598 341 * be used to trigger specific actions (such as communications or data
mbed_official 237:f3da66175598 342 * logging), before resetting the device.
mbed_official 237:f3da66175598 343 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 344 * @retval None
mbed_official 237:f3da66175598 345 */
mbed_official 237:f3da66175598 346 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 347 {
mbed_official 237:f3da66175598 348 /* WWDG Early Wakeup Interrupt occurred */
mbed_official 237:f3da66175598 349 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 237:f3da66175598 350 {
mbed_official 237:f3da66175598 351 /* Early Wakeup callback */
mbed_official 237:f3da66175598 352 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 237:f3da66175598 353
mbed_official 237:f3da66175598 354 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 355 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 356
mbed_official 237:f3da66175598 357 /* Clear the WWDG Data Ready flag */
mbed_official 237:f3da66175598 358 __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
mbed_official 237:f3da66175598 359
mbed_official 237:f3da66175598 360 /* Process unlocked */
mbed_official 237:f3da66175598 361 __HAL_UNLOCK(hwwdg);
mbed_official 237:f3da66175598 362 }
mbed_official 237:f3da66175598 363 }
mbed_official 237:f3da66175598 364
mbed_official 237:f3da66175598 365 /**
mbed_official 237:f3da66175598 366 * @}
mbed_official 237:f3da66175598 367 */
mbed_official 237:f3da66175598 368
mbed_official 375:3d36234a1087 369 /** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 237:f3da66175598 370 * @brief Peripheral State functions.
mbed_official 237:f3da66175598 371 *
mbed_official 237:f3da66175598 372 @verbatim
mbed_official 237:f3da66175598 373 ===============================================================================
mbed_official 237:f3da66175598 374 ##### Peripheral State functions #####
mbed_official 237:f3da66175598 375 ===============================================================================
mbed_official 237:f3da66175598 376 [..]
mbed_official 237:f3da66175598 377 This subsection permits to get in run-time the status of the peripheral
mbed_official 237:f3da66175598 378 and the data flow.
mbed_official 237:f3da66175598 379
mbed_official 237:f3da66175598 380 @endverbatim
mbed_official 237:f3da66175598 381 * @{
mbed_official 237:f3da66175598 382 */
mbed_official 237:f3da66175598 383
mbed_official 237:f3da66175598 384 /**
mbed_official 237:f3da66175598 385 * @brief Returns the WWDG state.
mbed_official 237:f3da66175598 386 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 387 * @retval HAL state
mbed_official 237:f3da66175598 388 */
mbed_official 237:f3da66175598 389 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 390 {
mbed_official 237:f3da66175598 391 return hwwdg->State;
mbed_official 237:f3da66175598 392 }
mbed_official 237:f3da66175598 393 /**
mbed_official 237:f3da66175598 394 * @}
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 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 237:f3da66175598 402 /**
mbed_official 237:f3da66175598 403 * @}
mbed_official 237:f3da66175598 404 */
mbed_official 237:f3da66175598 405
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 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/