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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_NUCLEO_F334R8/stm32f3xx_hal_wwdg.c@237:f3da66175598, 2014-06-24 (annotated)

Committer:
mbed_official
Date:
Tue Jun 24 14:45:08 2014 +0100
Revision:
237:f3da66175598
Child:
375:3d36234a1087
Synchronized with git revision 8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7



Full URL: https://github.com/mbedmicro/mbed/commit/8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7/



[NUCLEO_F334R8] Add platform files

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 237:f3da66175598 5 * @version V1.0.1
mbed_official 237:f3da66175598 6 * @date 18-June-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 237:f3da66175598 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 237:f3da66175598 92 /** @defgroup WWDG
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 237:f3da66175598 104 /* Private functions ---------------------------------------------------------*/
mbed_official 237:f3da66175598 105
mbed_official 237:f3da66175598 106 /** @defgroup WWDG_Private_Functions
mbed_official 237:f3da66175598 107 * @{
mbed_official 237:f3da66175598 108 */
mbed_official 237:f3da66175598 109
mbed_official 237:f3da66175598 110 /** @defgroup HAL_WWDG_Group1 Initialization/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 uint32_t tmp = 0;
mbed_official 237:f3da66175598 137
mbed_official 237:f3da66175598 138 /* Check the WWDG handle allocation */
mbed_official 237:f3da66175598 139 if(hwwdg == NULL)
mbed_official 237:f3da66175598 140 {
mbed_official 237:f3da66175598 141 return HAL_ERROR;
mbed_official 237:f3da66175598 142 }
mbed_official 237:f3da66175598 143
mbed_official 237:f3da66175598 144 /* Check the parameters */
mbed_official 237:f3da66175598 145 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 237:f3da66175598 146 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 237:f3da66175598 147 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 237:f3da66175598 148 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 237:f3da66175598 149
mbed_official 237:f3da66175598 150 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 237:f3da66175598 151 {
mbed_official 237:f3da66175598 152 /* Init the low level hardware */
mbed_official 237:f3da66175598 153 HAL_WWDG_MspInit(hwwdg);
mbed_official 237:f3da66175598 154 }
mbed_official 237:f3da66175598 155
mbed_official 237:f3da66175598 156 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 157 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 158
mbed_official 237:f3da66175598 159 /* Set WWDG Prescaler and Window */
mbed_official 237:f3da66175598 160 /* Get the CFR register value */
mbed_official 237:f3da66175598 161 tmp = hwwdg->Instance->CFR;
mbed_official 237:f3da66175598 162
mbed_official 237:f3da66175598 163 /* Clear WDGTB[1:0] and W[6:0] bits */
mbed_official 237:f3da66175598 164 tmp &= ((uint32_t)~(WWDG_CFR_WDGTB | WWDG_CFR_W));
mbed_official 237:f3da66175598 165
mbed_official 237:f3da66175598 166 /* Prepare the WWDG Prescaler and Window parameters */
mbed_official 237:f3da66175598 167 tmp |= hwwdg->Init.Prescaler | hwwdg->Init.Window;
mbed_official 237:f3da66175598 168
mbed_official 237:f3da66175598 169 /* Write to WWDG CFR */
mbed_official 237:f3da66175598 170 hwwdg->Instance->CFR = tmp;
mbed_official 237:f3da66175598 171
mbed_official 237:f3da66175598 172 /* Set WWDG Counter */
mbed_official 237:f3da66175598 173 /* Get the CR register value */
mbed_official 237:f3da66175598 174 tmp = hwwdg->Instance->CR;
mbed_official 237:f3da66175598 175
mbed_official 237:f3da66175598 176 /* Clear T[6:0] bits */
mbed_official 237:f3da66175598 177 tmp &= ((uint32_t)~(WWDG_CR_T));
mbed_official 237:f3da66175598 178
mbed_official 237:f3da66175598 179 /* Prepare the WWDG Counter parameter */
mbed_official 237:f3da66175598 180 tmp |= (hwwdg->Init.Counter);
mbed_official 237:f3da66175598 181
mbed_official 237:f3da66175598 182 /* Write to WWDG CR */
mbed_official 237:f3da66175598 183 hwwdg->Instance->CR = tmp;
mbed_official 237:f3da66175598 184
mbed_official 237:f3da66175598 185 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 186 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 187
mbed_official 237:f3da66175598 188 /* Return function status */
mbed_official 237:f3da66175598 189 return HAL_OK;
mbed_official 237:f3da66175598 190 }
mbed_official 237:f3da66175598 191
mbed_official 237:f3da66175598 192 /**
mbed_official 237:f3da66175598 193 * @brief DeInitializes the WWDG peripheral.
mbed_official 237:f3da66175598 194 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 195 * @retval HAL status
mbed_official 237:f3da66175598 196 */
mbed_official 237:f3da66175598 197 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 198 {
mbed_official 237:f3da66175598 199 /* Check the parameters */
mbed_official 237:f3da66175598 200 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 237:f3da66175598 201
mbed_official 237:f3da66175598 202 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 203 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 204
mbed_official 237:f3da66175598 205 /* DeInit the low level hardware */
mbed_official 237:f3da66175598 206 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 237:f3da66175598 207
mbed_official 237:f3da66175598 208 /* Reset WWDG Control register */
mbed_official 237:f3da66175598 209 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 237:f3da66175598 210
mbed_official 237:f3da66175598 211 /* Reset WWDG Configuration register */
mbed_official 237:f3da66175598 212 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 237:f3da66175598 213
mbed_official 237:f3da66175598 214 /* Reset WWDG Status register */
mbed_official 237:f3da66175598 215 hwwdg->Instance->SR = 0;
mbed_official 237:f3da66175598 216
mbed_official 237:f3da66175598 217 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 218 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 237:f3da66175598 219
mbed_official 237:f3da66175598 220 /* Return function status */
mbed_official 237:f3da66175598 221 return HAL_OK;
mbed_official 237:f3da66175598 222 }
mbed_official 237:f3da66175598 223
mbed_official 237:f3da66175598 224 /**
mbed_official 237:f3da66175598 225 * @brief Initializes the WWDG MSP.
mbed_official 237:f3da66175598 226 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 227 * @retval None
mbed_official 237:f3da66175598 228 */
mbed_official 237:f3da66175598 229 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 230 {
mbed_official 237:f3da66175598 231 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 232 the HAL_WWDG_MspInit could be implemented in the user file
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 * @brief DeInitializes the WWDG MSP.
mbed_official 237:f3da66175598 238 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 239 * @retval None
mbed_official 237:f3da66175598 240 */
mbed_official 237:f3da66175598 241 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 242 {
mbed_official 237:f3da66175598 243 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 244 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 237:f3da66175598 245 */
mbed_official 237:f3da66175598 246 }
mbed_official 237:f3da66175598 247
mbed_official 237:f3da66175598 248 /**
mbed_official 237:f3da66175598 249 * @brief Early Wakeup WWDG callback.
mbed_official 237:f3da66175598 250 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 251 * @retval None
mbed_official 237:f3da66175598 252 */
mbed_official 237:f3da66175598 253 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 237:f3da66175598 254 {
mbed_official 237:f3da66175598 255 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 256 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 237:f3da66175598 257 */
mbed_official 237:f3da66175598 258 }
mbed_official 237:f3da66175598 259
mbed_official 237:f3da66175598 260 /**
mbed_official 237:f3da66175598 261 * @}
mbed_official 237:f3da66175598 262 */
mbed_official 237:f3da66175598 263
mbed_official 237:f3da66175598 264 /** @defgroup HAL_WWDG_Group2 I/O operation functions
mbed_official 237:f3da66175598 265 * @brief I/O operation functions
mbed_official 237:f3da66175598 266 *
mbed_official 237:f3da66175598 267 @verbatim
mbed_official 237:f3da66175598 268 ===============================================================================
mbed_official 237:f3da66175598 269 ##### IO operation functions #####
mbed_official 237:f3da66175598 270 ===============================================================================
mbed_official 237:f3da66175598 271 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 272 (+) Start the WWDG.
mbed_official 237:f3da66175598 273 (+) Refresh the WWDG.
mbed_official 237:f3da66175598 274 (+) Handle WWDG interrupt request.
mbed_official 237:f3da66175598 275
mbed_official 237:f3da66175598 276 @endverbatim
mbed_official 237:f3da66175598 277 * @{
mbed_official 237:f3da66175598 278 */
mbed_official 237:f3da66175598 279
mbed_official 237:f3da66175598 280 /**
mbed_official 237:f3da66175598 281 * @brief Starts the WWDG
mbed_official 237:f3da66175598 282 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 283 * @retval HAL status
mbed_official 237:f3da66175598 284 */
mbed_official 237:f3da66175598 285 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 286 {
mbed_official 237:f3da66175598 287 /* Process locked */
mbed_official 237:f3da66175598 288 __HAL_LOCK(hwwdg);
mbed_official 237:f3da66175598 289
mbed_official 237:f3da66175598 290 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 291 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 292
mbed_official 237:f3da66175598 293 /* Enable the Peripheral */
mbed_official 237:f3da66175598 294 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 237:f3da66175598 295
mbed_official 237:f3da66175598 296 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 297 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 298
mbed_official 237:f3da66175598 299 /* Process unlocked */
mbed_official 237:f3da66175598 300 __HAL_UNLOCK(hwwdg);
mbed_official 237:f3da66175598 301
mbed_official 237:f3da66175598 302 /* Return function status */
mbed_official 237:f3da66175598 303 return HAL_OK;
mbed_official 237:f3da66175598 304 }
mbed_official 237:f3da66175598 305
mbed_official 237:f3da66175598 306 /**
mbed_official 237:f3da66175598 307 * @brief Starts the WWDG with interrupt enabled.
mbed_official 237:f3da66175598 308 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 309 * @retval HAL status
mbed_official 237:f3da66175598 310 */
mbed_official 237:f3da66175598 311 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 312 {
mbed_official 237:f3da66175598 313 /* Process locked */
mbed_official 237:f3da66175598 314 __HAL_LOCK(hwwdg);
mbed_official 237:f3da66175598 315
mbed_official 237:f3da66175598 316 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 317 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 318
mbed_official 237:f3da66175598 319 /* Enable the Early Wakeup Interrupt */
mbed_official 237:f3da66175598 320 __HAL_WWDG_ENABLE_IT(WWDG_IT_EWI);
mbed_official 237:f3da66175598 321
mbed_official 237:f3da66175598 322 /* Enable the Peripheral */
mbed_official 237:f3da66175598 323 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 237:f3da66175598 324
mbed_official 237:f3da66175598 325 /* Return function status */
mbed_official 237:f3da66175598 326 return HAL_OK;
mbed_official 237:f3da66175598 327 }
mbed_official 237:f3da66175598 328
mbed_official 237:f3da66175598 329 /**
mbed_official 237:f3da66175598 330 * @brief Refreshes the WWDG.
mbed_official 237:f3da66175598 331 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 332 * @param Counter: Counter value to refresh WWDG with
mbed_official 237:f3da66175598 333 * @retval HAL status
mbed_official 237:f3da66175598 334 */
mbed_official 237:f3da66175598 335 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 237:f3da66175598 336 {
mbed_official 237:f3da66175598 337 /* Process locked */
mbed_official 237:f3da66175598 338 __HAL_LOCK(hwwdg);
mbed_official 237:f3da66175598 339
mbed_official 237:f3da66175598 340 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 341 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 237:f3da66175598 342
mbed_official 237:f3da66175598 343 /* Check the parameters */
mbed_official 237:f3da66175598 344 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 237:f3da66175598 345
mbed_official 237:f3da66175598 346 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 237:f3da66175598 347 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, Counter);
mbed_official 237:f3da66175598 348
mbed_official 237:f3da66175598 349 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 350 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 351
mbed_official 237:f3da66175598 352 /* Process unlocked */
mbed_official 237:f3da66175598 353 __HAL_UNLOCK(hwwdg);
mbed_official 237:f3da66175598 354
mbed_official 237:f3da66175598 355 /* Return function status */
mbed_official 237:f3da66175598 356 return HAL_OK;
mbed_official 237:f3da66175598 357 }
mbed_official 237:f3da66175598 358
mbed_official 237:f3da66175598 359 /**
mbed_official 237:f3da66175598 360 * @brief Handles WWDG interrupt request.
mbed_official 237:f3da66175598 361 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 237:f3da66175598 362 * or data logging must be performed before the actual reset is generated.
mbed_official 237:f3da66175598 363 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 237:f3da66175598 364 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 237:f3da66175598 365 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 237:f3da66175598 366 * be used to trigger specific actions (such as communications or data
mbed_official 237:f3da66175598 367 * logging), before resetting the device.
mbed_official 237:f3da66175598 368 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 369 * @retval None
mbed_official 237:f3da66175598 370 */
mbed_official 237:f3da66175598 371 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 372 {
mbed_official 237:f3da66175598 373 /* WWDG Early Wakeup Interrupt occurred */
mbed_official 237:f3da66175598 374 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 237:f3da66175598 375 {
mbed_official 237:f3da66175598 376 /* Early Wakeup callback */
mbed_official 237:f3da66175598 377 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 237:f3da66175598 378
mbed_official 237:f3da66175598 379 /* Change WWDG peripheral state */
mbed_official 237:f3da66175598 380 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 237:f3da66175598 381
mbed_official 237:f3da66175598 382 /* Clear the WWDG Data Ready flag */
mbed_official 237:f3da66175598 383 __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
mbed_official 237:f3da66175598 384
mbed_official 237:f3da66175598 385 /* Process unlocked */
mbed_official 237:f3da66175598 386 __HAL_UNLOCK(hwwdg);
mbed_official 237:f3da66175598 387 }
mbed_official 237:f3da66175598 388 }
mbed_official 237:f3da66175598 389
mbed_official 237:f3da66175598 390 /**
mbed_official 237:f3da66175598 391 * @}
mbed_official 237:f3da66175598 392 */
mbed_official 237:f3da66175598 393
mbed_official 237:f3da66175598 394 /** @defgroup HAL_WWDG_Group3 Peripheral State functions
mbed_official 237:f3da66175598 395 * @brief Peripheral State functions.
mbed_official 237:f3da66175598 396 *
mbed_official 237:f3da66175598 397 @verbatim
mbed_official 237:f3da66175598 398 ===============================================================================
mbed_official 237:f3da66175598 399 ##### Peripheral State functions #####
mbed_official 237:f3da66175598 400 ===============================================================================
mbed_official 237:f3da66175598 401 [..]
mbed_official 237:f3da66175598 402 This subsection permits to get in run-time the status of the peripheral
mbed_official 237:f3da66175598 403 and the data flow.
mbed_official 237:f3da66175598 404
mbed_official 237:f3da66175598 405 @endverbatim
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 * @brief Returns the WWDG state.
mbed_official 237:f3da66175598 411 * @param hwwdg: WWDG handle
mbed_official 237:f3da66175598 412 * @retval HAL state
mbed_official 237:f3da66175598 413 */
mbed_official 237:f3da66175598 414 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 237:f3da66175598 415 {
mbed_official 237:f3da66175598 416 return hwwdg->State;
mbed_official 237:f3da66175598 417 }
mbed_official 237:f3da66175598 418 /**
mbed_official 237:f3da66175598 419 * @}
mbed_official 237:f3da66175598 420 */
mbed_official 237:f3da66175598 421
mbed_official 237:f3da66175598 422 /**
mbed_official 237:f3da66175598 423 * @}
mbed_official 237:f3da66175598 424 */
mbed_official 237:f3da66175598 425
mbed_official 237:f3da66175598 426 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 237:f3da66175598 427 /**
mbed_official 237:f3da66175598 428 * @}
mbed_official 237:f3da66175598 429 */
mbed_official 237:f3da66175598 430
mbed_official 237:f3da66175598 431 /**
mbed_official 237:f3da66175598 432 * @}
mbed_official 237:f3da66175598 433 */
mbed_official 237:f3da66175598 434
mbed_official 237:f3da66175598 435 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/