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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_wwdg.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Parent:
489:119543c9f674 
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 376:cb4d9db17537 1 /**
mbed_official 376:cb4d9db17537 2 ******************************************************************************
mbed_official 376:cb4d9db17537 3 * @file stm32l0xx_hal_wwdg.c
mbed_official 376:cb4d9db17537 4 * @author MCD Application Team
mbed_official 489:119543c9f674 5 * @version V1.2.0
mbed_official 489:119543c9f674 6 * @date 06-February-2015
mbed_official 376:cb4d9db17537 7 * @brief WWDG HAL module driver.
mbed_official 376:cb4d9db17537 8 * This file provides firmware functions to manage the following
mbed_official 376:cb4d9db17537 9 * functionalities of the Window Watchdog (WWDG) peripheral:
mbed_official 376:cb4d9db17537 10 * + Initialization and de-initialization functions
mbed_official 376:cb4d9db17537 11 * + IO operation functions
mbed_official 376:cb4d9db17537 12 * + Peripheral State functions
mbed_official 376:cb4d9db17537 13 @verbatim
mbed_official 376:cb4d9db17537 14 ==============================================================================
mbed_official 376:cb4d9db17537 15 ##### WWDG specific features #####
mbed_official 376:cb4d9db17537 16 ==============================================================================
mbed_official 376:cb4d9db17537 17 [..]
mbed_official 376:cb4d9db17537 18 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 376:cb4d9db17537 19 time period, unless the program refreshes the counter (downcounter)
mbed_official 376:cb4d9db17537 20 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 376:cb4d9db17537 21 value rolls over from 0x40 to 0x3F).
mbed_official 376:cb4d9db17537 22
mbed_official 376:cb4d9db17537 23 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 376:cb4d9db17537 24 before the counter has reached the refresh window value. This
mbed_official 376:cb4d9db17537 25 implies that the counter must be refreshed in a limited window.
mbed_official 376:cb4d9db17537 26 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 376:cb4d9db17537 27 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 376:cb4d9db17537 28 reset occurs.
mbed_official 376:cb4d9db17537 29 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 376:cb4d9db17537 30 by a programmable prescaler.
mbed_official 376:cb4d9db17537 31 (+) WWDG counter clock = PCLK1 / Prescaler
mbed_official 376:cb4d9db17537 32 WWDG timeout = (WWDG counter clock) * (counter value)
mbed_official 376:cb4d9db17537 33 (+) Min-max timeout value @32 MHz(PCLK1): ~128.0 us / ~65.54 ms
mbed_official 376:cb4d9db17537 34
mbed_official 376:cb4d9db17537 35
mbed_official 376:cb4d9db17537 36 ##### How to use this driver #####
mbed_official 376:cb4d9db17537 37 ==============================================================================
mbed_official 376:cb4d9db17537 38 [..]
mbed_official 489:119543c9f674 39 (+) Enable WWDG APB1 clock using __HAL_RCC_WWDG_CLK_ENABLE().
mbed_official 376:cb4d9db17537 40 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 376:cb4d9db17537 41 using HAL_WWDG_Init() function.
mbed_official 376:cb4d9db17537 42 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 376:cb4d9db17537 43 When the WWDG is enabled the counter value should be configured to
mbed_official 376:cb4d9db17537 44 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 376:cb4d9db17537 45 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 376:cb4d9db17537 46 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 376:cb4d9db17537 47 HAL_WWDG_Start_IT().
mbed_official 376:cb4d9db17537 48 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 376:cb4d9db17537 49 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 376:cb4d9db17537 50 intervals during normal operation to prevent an MCU reset, using
mbed_official 376:cb4d9db17537 51 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 376:cb4d9db17537 52 the counter is lower than the refresh window value already programmed.
mbed_official 376:cb4d9db17537 53
mbed_official 376:cb4d9db17537 54 *** WWDG HAL driver macros list ***
mbed_official 376:cb4d9db17537 55 ==================================
mbed_official 376:cb4d9db17537 56 [..]
mbed_official 376:cb4d9db17537 57 Below the list of most used macros in WWDG HAL driver.
mbed_official 376:cb4d9db17537 58
mbed_official 376:cb4d9db17537 59 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 376:cb4d9db17537 60 (+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 376:cb4d9db17537 61 (+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 376:cb4d9db17537 62 (+) __HAL_WWDG_ENABLE_IT: Enables the WWDG early wakeup interrupt
mbed_official 376:cb4d9db17537 63
mbed_official 376:cb4d9db17537 64 @endverbatim
mbed_official 376:cb4d9db17537 65 ******************************************************************************
mbed_official 376:cb4d9db17537 66 * @attention
mbed_official 376:cb4d9db17537 67 *
mbed_official 489:119543c9f674 68 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 376:cb4d9db17537 69 *
mbed_official 376:cb4d9db17537 70 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 376:cb4d9db17537 71 * are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 72 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 73 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 74 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 75 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 76 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 77 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 78 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 79 * without specific prior written permission.
mbed_official 376:cb4d9db17537 80 *
mbed_official 376:cb4d9db17537 81 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 82 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 83 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 84 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 85 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 86 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 87 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 88 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 89 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 90 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 91 *
mbed_official 376:cb4d9db17537 92 ******************************************************************************
mbed_official 376:cb4d9db17537 93 */
mbed_official 376:cb4d9db17537 94
mbed_official 376:cb4d9db17537 95 /* Includes ------------------------------------------------------------------*/
mbed_official 376:cb4d9db17537 96 #include "stm32l0xx_hal.h"
mbed_official 376:cb4d9db17537 97
mbed_official 376:cb4d9db17537 98 /** @addtogroup STM32L0xx_HAL_Driver
mbed_official 376:cb4d9db17537 99 * @{
mbed_official 376:cb4d9db17537 100 */
mbed_official 376:cb4d9db17537 101
mbed_official 489:119543c9f674 102 /** @addtogroup WWDG
mbed_official 376:cb4d9db17537 103 * @brief WWDG HAL module driver.
mbed_official 376:cb4d9db17537 104 * @{
mbed_official 376:cb4d9db17537 105 */
mbed_official 376:cb4d9db17537 106
mbed_official 376:cb4d9db17537 107 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 376:cb4d9db17537 108
mbed_official 489:119543c9f674 109 /** @addtogroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 376:cb4d9db17537 110 * @{
mbed_official 376:cb4d9db17537 111 */
mbed_official 376:cb4d9db17537 112
mbed_official 489:119543c9f674 113 /** @addtogroup WWDG_Exported_Functions_Group1
mbed_official 376:cb4d9db17537 114 * @brief Initialization and Configuration functions.
mbed_official 376:cb4d9db17537 115 *
mbed_official 376:cb4d9db17537 116 @verbatim
mbed_official 376:cb4d9db17537 117 ==============================================================================
mbed_official 376:cb4d9db17537 118 ##### Initialization and de-initialization functions #####
mbed_official 376:cb4d9db17537 119 ==============================================================================
mbed_official 376:cb4d9db17537 120 [..]
mbed_official 376:cb4d9db17537 121 This section provides functions allowing to:
mbed_official 376:cb4d9db17537 122 (+) Initialize the WWDG according to the specified parameters
mbed_official 376:cb4d9db17537 123 in the WWDG_InitTypeDef and create the associated handle
mbed_official 376:cb4d9db17537 124 (+) DeInitialize the WWDG peripheral
mbed_official 376:cb4d9db17537 125 (+) Initialize the WWDG MSP
mbed_official 376:cb4d9db17537 126 (+) DeInitialize the WWDG MSP
mbed_official 376:cb4d9db17537 127
mbed_official 376:cb4d9db17537 128 @endverbatim
mbed_official 376:cb4d9db17537 129 * @{
mbed_official 376:cb4d9db17537 130 */
mbed_official 376:cb4d9db17537 131
mbed_official 376:cb4d9db17537 132 /**
mbed_official 376:cb4d9db17537 133 * @brief Initializes the WWDG according to the specified
mbed_official 376:cb4d9db17537 134 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 489:119543c9f674 135 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 136 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 137 * @retval HAL status
mbed_official 376:cb4d9db17537 138 */
mbed_official 376:cb4d9db17537 139 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 140 {
mbed_official 376:cb4d9db17537 141
mbed_official 376:cb4d9db17537 142 /* Check the WWDG handle allocation */
mbed_official 489:119543c9f674 143 if(hwwdg == NULL)
mbed_official 376:cb4d9db17537 144 {
mbed_official 376:cb4d9db17537 145 return HAL_ERROR;
mbed_official 376:cb4d9db17537 146 }
mbed_official 376:cb4d9db17537 147
mbed_official 376:cb4d9db17537 148 /* Check the parameters */
mbed_official 376:cb4d9db17537 149 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 376:cb4d9db17537 150 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 376:cb4d9db17537 151 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 376:cb4d9db17537 152 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 376:cb4d9db17537 153
mbed_official 376:cb4d9db17537 154 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 376:cb4d9db17537 155 {
mbed_official 376:cb4d9db17537 156 /* Init the low level hardware */
mbed_official 376:cb4d9db17537 157 HAL_WWDG_MspInit(hwwdg);
mbed_official 376:cb4d9db17537 158 }
mbed_official 376:cb4d9db17537 159
mbed_official 489:119543c9f674 160 /* Take lock and change peripheral state */
mbed_official 489:119543c9f674 161 __HAL_LOCK(hwwdg);
mbed_official 376:cb4d9db17537 162 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 163
mbed_official 489:119543c9f674 164 /* Set WWDG Prescaler and Window and Counter*/
mbed_official 489:119543c9f674 165 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 489:119543c9f674 166 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 376:cb4d9db17537 167
mbed_official 489:119543c9f674 168 /* Change peripheral state and release lock*/
mbed_official 376:cb4d9db17537 169 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 489:119543c9f674 170 __HAL_UNLOCK(hwwdg);
mbed_official 376:cb4d9db17537 171
mbed_official 376:cb4d9db17537 172 /* Return function status */
mbed_official 376:cb4d9db17537 173 return HAL_OK;
mbed_official 376:cb4d9db17537 174 }
mbed_official 376:cb4d9db17537 175
mbed_official 376:cb4d9db17537 176 /**
mbed_official 376:cb4d9db17537 177 * @brief DeInitializes the WWDG peripheral.
mbed_official 489:119543c9f674 178 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 179 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 180 * @retval HAL status
mbed_official 376:cb4d9db17537 181 */
mbed_official 376:cb4d9db17537 182 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 183 {
mbed_official 376:cb4d9db17537 184 /* Check the parameters */
mbed_official 376:cb4d9db17537 185 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 376:cb4d9db17537 186
mbed_official 489:119543c9f674 187 /* Take lock and change peripheral state */
mbed_official 489:119543c9f674 188 __HAL_LOCK(hwwdg);
mbed_official 376:cb4d9db17537 189 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 190
mbed_official 376:cb4d9db17537 191 /* DeInit the low level hardware */
mbed_official 376:cb4d9db17537 192 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 376:cb4d9db17537 193
mbed_official 489:119543c9f674 194 /* Reset WWDG Control, configuration and status register */
mbed_official 489:119543c9f674 195 MODIFY_REG(hwwdg->Instance->CR, (WWDG_CR_T | WWDG_CR_WDGA),0x0000007F);
mbed_official 489:119543c9f674 196 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W | WWDG_CFR_EWI),0x0000007F);
mbed_official 489:119543c9f674 197 MODIFY_REG(hwwdg->Instance->SR,WWDG_SR_EWIF,0x0);
mbed_official 376:cb4d9db17537 198
mbed_official 489:119543c9f674 199 /* Change peripheral state and release lock*/
mbed_official 376:cb4d9db17537 200 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 376:cb4d9db17537 201 __HAL_UNLOCK(hwwdg);
mbed_official 376:cb4d9db17537 202
mbed_official 376:cb4d9db17537 203 /* Return function status */
mbed_official 376:cb4d9db17537 204 return HAL_OK;
mbed_official 376:cb4d9db17537 205 }
mbed_official 376:cb4d9db17537 206
mbed_official 376:cb4d9db17537 207 /**
mbed_official 376:cb4d9db17537 208 * @brief Initializes the WWDG MSP.
mbed_official 489:119543c9f674 209 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 210 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 211 * @retval None
mbed_official 376:cb4d9db17537 212 */
mbed_official 376:cb4d9db17537 213 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 214 {
mbed_official 376:cb4d9db17537 215 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 376:cb4d9db17537 216 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 376:cb4d9db17537 217 */
mbed_official 376:cb4d9db17537 218 }
mbed_official 376:cb4d9db17537 219
mbed_official 376:cb4d9db17537 220 /**
mbed_official 376:cb4d9db17537 221 * @brief DeInitializes the WWDG MSP.
mbed_official 489:119543c9f674 222 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 223 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 224 * @retval None
mbed_official 376:cb4d9db17537 225 */
mbed_official 376:cb4d9db17537 226 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 227 {
mbed_official 376:cb4d9db17537 228 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 376:cb4d9db17537 229 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 376:cb4d9db17537 230 */
mbed_official 376:cb4d9db17537 231 }
mbed_official 376:cb4d9db17537 232
mbed_official 376:cb4d9db17537 233 /**
mbed_official 376:cb4d9db17537 234 * @}
mbed_official 376:cb4d9db17537 235 */
mbed_official 376:cb4d9db17537 236
mbed_official 489:119543c9f674 237 /** @addtogroup WWDG_Exported_Functions_Group2
mbed_official 376:cb4d9db17537 238 * @brief IO operation functions
mbed_official 376:cb4d9db17537 239 *
mbed_official 376:cb4d9db17537 240 @verbatim
mbed_official 376:cb4d9db17537 241 ==============================================================================
mbed_official 376:cb4d9db17537 242 ##### IO operation functions #####
mbed_official 376:cb4d9db17537 243 ==============================================================================
mbed_official 376:cb4d9db17537 244 [..]
mbed_official 376:cb4d9db17537 245 This section provides functions allowing to:
mbed_official 376:cb4d9db17537 246 (+) Start the WWDG.
mbed_official 376:cb4d9db17537 247 (+) Refresh the WWDG.
mbed_official 376:cb4d9db17537 248 (+) Handle WWDG interrupt request.
mbed_official 376:cb4d9db17537 249
mbed_official 376:cb4d9db17537 250 @endverbatim
mbed_official 376:cb4d9db17537 251 * @{
mbed_official 376:cb4d9db17537 252 */
mbed_official 376:cb4d9db17537 253
mbed_official 376:cb4d9db17537 254 /**
mbed_official 376:cb4d9db17537 255 * @brief Starts the WWDG.
mbed_official 489:119543c9f674 256 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 257 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 258 * @retval HAL status
mbed_official 376:cb4d9db17537 259 */
mbed_official 376:cb4d9db17537 260 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 261 {
mbed_official 489:119543c9f674 262 /* Take lock and change peripheral state */
mbed_official 376:cb4d9db17537 263 __HAL_LOCK(hwwdg);
mbed_official 376:cb4d9db17537 264 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 265
mbed_official 376:cb4d9db17537 266 /* Enable the peripheral */
mbed_official 376:cb4d9db17537 267 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 376:cb4d9db17537 268
mbed_official 489:119543c9f674 269 /* Change peripheral state and release lock*/
mbed_official 376:cb4d9db17537 270 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 376:cb4d9db17537 271 __HAL_UNLOCK(hwwdg);
mbed_official 376:cb4d9db17537 272
mbed_official 376:cb4d9db17537 273 /* Return function status */
mbed_official 376:cb4d9db17537 274 return HAL_OK;
mbed_official 376:cb4d9db17537 275 }
mbed_official 376:cb4d9db17537 276
mbed_official 376:cb4d9db17537 277 /**
mbed_official 376:cb4d9db17537 278 * @brief Starts the WWDG with interrupt enabled.
mbed_official 489:119543c9f674 279 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 280 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 281 * @retval HAL status
mbed_official 376:cb4d9db17537 282 */
mbed_official 376:cb4d9db17537 283 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 284 {
mbed_official 489:119543c9f674 285 /* Take lock and change peripheral state */
mbed_official 376:cb4d9db17537 286 __HAL_LOCK(hwwdg);
mbed_official 376:cb4d9db17537 287 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 288
mbed_official 376:cb4d9db17537 289 /* Enable the Early Wakeup Interrupt */
mbed_official 489:119543c9f674 290 __HAL_WWDG_ENABLE_IT(hwwdg,WWDG_IT_EWI);
mbed_official 376:cb4d9db17537 291
mbed_official 376:cb4d9db17537 292 /* Enable the peripheral */
mbed_official 376:cb4d9db17537 293 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 376:cb4d9db17537 294
mbed_official 489:119543c9f674 295 /* Change peripheral state and release lock*/
mbed_official 489:119543c9f674 296 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 489:119543c9f674 297 __HAL_UNLOCK(hwwdg);
mbed_official 489:119543c9f674 298
mbed_official 376:cb4d9db17537 299 /* Return function status */
mbed_official 376:cb4d9db17537 300 return HAL_OK;
mbed_official 376:cb4d9db17537 301 }
mbed_official 376:cb4d9db17537 302
mbed_official 376:cb4d9db17537 303 /**
mbed_official 376:cb4d9db17537 304 * @brief Refreshes the WWDG.
mbed_official 489:119543c9f674 305 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 306 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 307 * @param Counter: value of counter to put in WWDG counter
mbed_official 376:cb4d9db17537 308 * @retval HAL status
mbed_official 376:cb4d9db17537 309 */
mbed_official 376:cb4d9db17537 310 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 376:cb4d9db17537 311 {
mbed_official 376:cb4d9db17537 312
mbed_official 376:cb4d9db17537 313 /* Check the parameters */
mbed_official 376:cb4d9db17537 314 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 376:cb4d9db17537 315
mbed_official 376:cb4d9db17537 316 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 376:cb4d9db17537 317 MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
mbed_official 376:cb4d9db17537 318
mbed_official 376:cb4d9db17537 319 /* Return function status */
mbed_official 376:cb4d9db17537 320 return HAL_OK;
mbed_official 376:cb4d9db17537 321 }
mbed_official 376:cb4d9db17537 322
mbed_official 376:cb4d9db17537 323 /**
mbed_official 376:cb4d9db17537 324 * @brief Handles WWDG interrupt request.
mbed_official 376:cb4d9db17537 325 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 376:cb4d9db17537 326 * or data logging must be performed before the actual reset is generated.
mbed_official 376:cb4d9db17537 327 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 376:cb4d9db17537 328 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 376:cb4d9db17537 329 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 376:cb4d9db17537 330 * be used to trigger specific actions (such as communications or data
mbed_official 376:cb4d9db17537 331 * logging), before resetting the device.
mbed_official 489:119543c9f674 332 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 333 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 334 * @retval None
mbed_official 376:cb4d9db17537 335 */
mbed_official 376:cb4d9db17537 336 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 337 {
mbed_official 489:119543c9f674 338 /* Check if Early Wakeup Interrupt is enable */
mbed_official 489:119543c9f674 339 if(__HAL_WWDG_GET_IT_SOURCE(hwwdg, WWDG_IT_EWI) != RESET)
mbed_official 376:cb4d9db17537 340 {
mbed_official 489:119543c9f674 341 /* Check if WWDG Early Wakeup Interrupt occurred */
mbed_official 489:119543c9f674 342 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 489:119543c9f674 343 {
mbed_official 489:119543c9f674 344 /* Early Wakeup callback */
mbed_official 489:119543c9f674 345 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 376:cb4d9db17537 346
mbed_official 489:119543c9f674 347 /* Clear the WWDG Data Ready flag */
mbed_official 489:119543c9f674 348 __HAL_WWDG_CLEAR_IT(hwwdg, WWDG_FLAG_EWIF);
mbed_official 489:119543c9f674 349 }
mbed_official 376:cb4d9db17537 350 }
mbed_official 376:cb4d9db17537 351 }
mbed_official 376:cb4d9db17537 352
mbed_official 376:cb4d9db17537 353 /**
mbed_official 376:cb4d9db17537 354 * @brief Early Wakeup WWDG callback.
mbed_official 489:119543c9f674 355 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 356 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 357 * @retval None
mbed_official 376:cb4d9db17537 358 */
mbed_official 376:cb4d9db17537 359 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 376:cb4d9db17537 360 {
mbed_official 376:cb4d9db17537 361 }
mbed_official 376:cb4d9db17537 362
mbed_official 376:cb4d9db17537 363 /**
mbed_official 376:cb4d9db17537 364 * @}
mbed_official 376:cb4d9db17537 365 */
mbed_official 376:cb4d9db17537 366
mbed_official 489:119543c9f674 367 /** @addtogroup WWDG_Exported_Functions_Group3
mbed_official 376:cb4d9db17537 368 * @brief Peripheral State functions.
mbed_official 376:cb4d9db17537 369 *
mbed_official 376:cb4d9db17537 370 @verbatim
mbed_official 376:cb4d9db17537 371 ==============================================================================
mbed_official 376:cb4d9db17537 372 ##### Peripheral State functions #####
mbed_official 376:cb4d9db17537 373 ==============================================================================
mbed_official 376:cb4d9db17537 374 [..]
mbed_official 376:cb4d9db17537 375 This subsection permits to get in run-time the status of the peripheral
mbed_official 376:cb4d9db17537 376 and the data flow.
mbed_official 376:cb4d9db17537 377
mbed_official 376:cb4d9db17537 378 @endverbatim
mbed_official 376:cb4d9db17537 379 * @{
mbed_official 376:cb4d9db17537 380 */
mbed_official 376:cb4d9db17537 381
mbed_official 376:cb4d9db17537 382 /**
mbed_official 376:cb4d9db17537 383 * @brief Returns the WWDG state.
mbed_official 489:119543c9f674 384 * @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 385 * the configuration information for the specified WWDG module.
mbed_official 376:cb4d9db17537 386 * @retval HAL state
mbed_official 376:cb4d9db17537 387 */
mbed_official 376:cb4d9db17537 388 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 376:cb4d9db17537 389 {
mbed_official 376:cb4d9db17537 390 return hwwdg->State;
mbed_official 376:cb4d9db17537 391 }
mbed_official 376:cb4d9db17537 392
mbed_official 376:cb4d9db17537 393 /**
mbed_official 376:cb4d9db17537 394 * @}
mbed_official 376:cb4d9db17537 395 */
mbed_official 376:cb4d9db17537 396
mbed_official 376:cb4d9db17537 397 /**
mbed_official 376:cb4d9db17537 398 * @}
mbed_official 376:cb4d9db17537 399 */
mbed_official 376:cb4d9db17537 400
mbed_official 376:cb4d9db17537 401 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 376:cb4d9db17537 402 /**
mbed_official 376:cb4d9db17537 403 * @}
mbed_official 376:cb4d9db17537 404 */
mbed_official 376:cb4d9db17537 405
mbed_official 376:cb4d9db17537 406 /**
mbed_official 376:cb4d9db17537 407 * @}
mbed_official 376:cb4d9db17537 408 */
mbed_official 376:cb4d9db17537 409
mbed_official 376:cb4d9db17537 410 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
mbed_official 489:119543c9f674 411