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targets/cmsis/TARGET_STM/TARGET_STM32F0/stm32f0xx_hal_wwdg.c@636:a11c0372f0ba, 2015-09-30 (annotated)

Committer:
mbed_official
Date:
Wed Sep 30 17:00:09 2015 +0100
Revision:
636:a11c0372f0ba
Parent:
631:825f75ca301e 
Synchronized with git revision d29c98dae61be0946ddf3a3c641c7726056f9452



Full URL: https://github.com/mbedmicro/mbed/commit/d29c98dae61be0946ddf3a3c641c7726056f9452/



Added support for SAMW25

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /**
mbed_official 340:28d1f895c6fe 2 ******************************************************************************
mbed_official 340:28d1f895c6fe 3 * @file stm32f0xx_hal_wwdg.c
mbed_official 340:28d1f895c6fe 4 * @author MCD Application Team
mbed_official 631:825f75ca301e 5 * @version V1.3.0
mbed_official 631:825f75ca301e 6 * @date 26-June-2015
mbed_official 340:28d1f895c6fe 7 * @brief WWDG HAL module driver.
mbed_official 340:28d1f895c6fe 8 * This file provides firmware functions to manage the following
mbed_official 340:28d1f895c6fe 9 * functionalities of the Window Watchdog (WWDG) peripheral:
mbed_official 340:28d1f895c6fe 10 * + Initialization and de-initialization functions
mbed_official 340:28d1f895c6fe 11 * + IO operation functions
mbed_official 340:28d1f895c6fe 12 * + Peripheral State functions
mbed_official 340:28d1f895c6fe 13 @verbatim
mbed_official 340:28d1f895c6fe 14 ==============================================================================
mbed_official 340:28d1f895c6fe 15 ##### WWDG specific features #####
mbed_official 340:28d1f895c6fe 16 ==============================================================================
mbed_official 340:28d1f895c6fe 17 [..]
mbed_official 340:28d1f895c6fe 18 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 631:825f75ca301e 19 time period, unless the program refreshes the counter (T[6;0] downcounter)
mbed_official 340:28d1f895c6fe 20 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 340:28d1f895c6fe 21 value rolls over from 0x40 to 0x3F).
mbed_official 340:28d1f895c6fe 22
mbed_official 340:28d1f895c6fe 23 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 340:28d1f895c6fe 24 before the counter has reached the refresh window value. This
mbed_official 340:28d1f895c6fe 25 implies that the counter must be refreshed in a limited window.
mbed_official 340:28d1f895c6fe 26 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 631:825f75ca301e 27 (+) WWDGRST flag in RCC_CSR register informs when a WWDG reset has
mbed_official 631:825f75ca301e 28 occurred (check available with __HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST)).
mbed_official 340:28d1f895c6fe 29 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 340:28d1f895c6fe 30 by a programmable prescaler.
mbed_official 340:28d1f895c6fe 31 (+) WWDG clock (Hz) = PCLK / (4096 * Prescaler)
mbed_official 340:28d1f895c6fe 32 (+) WWDG timeout (mS) = 1000 * (T[5;0] + 1) / WWDG clock
mbed_official 340:28d1f895c6fe 33 where T[5;0] are the lowest 6 bits of Counter.
mbed_official 340:28d1f895c6fe 34 (+) WWDG Counter refresh is allowed between the following limits :
mbed_official 340:28d1f895c6fe 35 (++) min time (mS) = 1000 * (Counter-Window) / WWDG clock
mbed_official 340:28d1f895c6fe 36 (++) max time (mS) = 1000 * (Counter-0x40) / WWDG clock
mbed_official 340:28d1f895c6fe 37 (+) Min-max timeout value @48 MHz(PCLK): ~85,3us / ~5,46 ms
mbed_official 340:28d1f895c6fe 38
mbed_official 340:28d1f895c6fe 39 ##### How to use this driver #####
mbed_official 340:28d1f895c6fe 40 ===============================================================================
mbed_official 340:28d1f895c6fe 41 [..]
mbed_official 631:825f75ca301e 42 (+) Enable WWDG APB1 clock using __HAL_RCC_WWDG_CLK_ENABLE().
mbed_official 340:28d1f895c6fe 43 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 340:28d1f895c6fe 44 using HAL_WWDG_Init() function.
mbed_official 340:28d1f895c6fe 45 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 340:28d1f895c6fe 46 When the WWDG is enabled the counter value should be configured to
mbed_official 340:28d1f895c6fe 47 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 340:28d1f895c6fe 48 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 340:28d1f895c6fe 49 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 631:825f75ca301e 50 HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback() is executed and user can
mbed_official 631:825f75ca301e 51 add his own code by customization of function pointer HAL_WWDG_WakeupCallback().
mbed_official 340:28d1f895c6fe 52 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 631:825f75ca301e 53 (+) The application program must refresh the WWDG counter at regular
mbed_official 631:825f75ca301e 54 intervals during normal operation to prevent an MCU reset using
mbed_official 340:28d1f895c6fe 55 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 340:28d1f895c6fe 56 the counter is lower than the refresh window value already programmed.
mbed_official 340:28d1f895c6fe 57
mbed_official 340:28d1f895c6fe 58 *** WWDG HAL driver macros list ***
mbed_official 340:28d1f895c6fe 59 ==================================
mbed_official 340:28d1f895c6fe 60 [..]
mbed_official 340:28d1f895c6fe 61 Below the list of most used macros in WWDG HAL driver.
mbed_official 340:28d1f895c6fe 62
mbed_official 340:28d1f895c6fe 63 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 631:825f75ca301e 64 (+) __HAL_WWDG_ENABLE_IT: Enable the WWDG early wakeup interrupt
mbed_official 631:825f75ca301e 65 (+) __HAL_WWDG_GET_IT_SOURCE: Check the selected WWDG's interrupt source
mbed_official 340:28d1f895c6fe 66 (+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 340:28d1f895c6fe 67 (+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 340:28d1f895c6fe 68
mbed_official 340:28d1f895c6fe 69 @endverbatim
mbed_official 340:28d1f895c6fe 70 ******************************************************************************
mbed_official 340:28d1f895c6fe 71 * @attention
mbed_official 340:28d1f895c6fe 72 *
mbed_official 631:825f75ca301e 73 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 340:28d1f895c6fe 74 *
mbed_official 340:28d1f895c6fe 75 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 340:28d1f895c6fe 76 * are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 77 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 78 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 79 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 80 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 81 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 82 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 83 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 84 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 85 *
mbed_official 340:28d1f895c6fe 86 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 87 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 88 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 89 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 90 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 91 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 93 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 94 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 95 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 96 *
mbed_official 340:28d1f895c6fe 97 ******************************************************************************
mbed_official 340:28d1f895c6fe 98 */
mbed_official 340:28d1f895c6fe 99
mbed_official 340:28d1f895c6fe 100 /* Includes ------------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 101 #include "stm32f0xx_hal.h"
mbed_official 340:28d1f895c6fe 102
mbed_official 340:28d1f895c6fe 103 /** @addtogroup STM32F0xx_HAL_Driver
mbed_official 340:28d1f895c6fe 104 * @{
mbed_official 340:28d1f895c6fe 105 */
mbed_official 340:28d1f895c6fe 106
mbed_official 631:825f75ca301e 107 /** @defgroup WWDG WWDG
mbed_official 340:28d1f895c6fe 108 * @brief WWDG HAL module driver.
mbed_official 340:28d1f895c6fe 109 * @{
mbed_official 340:28d1f895c6fe 110 */
mbed_official 340:28d1f895c6fe 111
mbed_official 340:28d1f895c6fe 112 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 340:28d1f895c6fe 113
mbed_official 340:28d1f895c6fe 114 /* Private typedef -----------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 115 /* Private define ------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 116 /* Private macro -------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 117 /* Private variables ---------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 118 /* Private function prototypes -----------------------------------------------*/
mbed_official 442:d2c15dda23c1 119 /* Exported functions --------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 120
mbed_official 340:28d1f895c6fe 121 /** @defgroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 340:28d1f895c6fe 122 * @{
mbed_official 340:28d1f895c6fe 123 */
mbed_official 340:28d1f895c6fe 124
mbed_official 340:28d1f895c6fe 125 /** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 340:28d1f895c6fe 126 * @brief Initialization and Configuration functions.
mbed_official 340:28d1f895c6fe 127 *
mbed_official 340:28d1f895c6fe 128 @verbatim
mbed_official 340:28d1f895c6fe 129 ==============================================================================
mbed_official 340:28d1f895c6fe 130 ##### Initialization and de-initialization functions #####
mbed_official 340:28d1f895c6fe 131 ==============================================================================
mbed_official 340:28d1f895c6fe 132 [..]
mbed_official 340:28d1f895c6fe 133 This section provides functions allowing to:
mbed_official 340:28d1f895c6fe 134 (+) Initialize the WWDG according to the specified parameters
mbed_official 631:825f75ca301e 135 in the WWDG_InitTypeDef and initialize the associated handle.
mbed_official 631:825f75ca301e 136 (+) DeInitialize the WWDG peripheral.
mbed_official 631:825f75ca301e 137 (+) Initialize the WWDG MSP.
mbed_official 631:825f75ca301e 138 (+) DeInitialize the WWDG MSP.
mbed_official 340:28d1f895c6fe 139
mbed_official 340:28d1f895c6fe 140 @endverbatim
mbed_official 340:28d1f895c6fe 141 * @{
mbed_official 340:28d1f895c6fe 142 */
mbed_official 340:28d1f895c6fe 143
mbed_official 340:28d1f895c6fe 144 /**
mbed_official 631:825f75ca301e 145 * @brief Initialize the WWDG according to the specified
mbed_official 631:825f75ca301e 146 * parameters in the WWDG_InitTypeDef and initialize the associated handle.
mbed_official 340:28d1f895c6fe 147 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 148 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 149 * @retval HAL status
mbed_official 340:28d1f895c6fe 150 */
mbed_official 340:28d1f895c6fe 151 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 152 {
mbed_official 340:28d1f895c6fe 153 /* Check the WWDG handle allocation */
mbed_official 442:d2c15dda23c1 154 if(hwwdg == NULL)
mbed_official 340:28d1f895c6fe 155 {
mbed_official 340:28d1f895c6fe 156 return HAL_ERROR;
mbed_official 340:28d1f895c6fe 157 }
mbed_official 340:28d1f895c6fe 158
mbed_official 340:28d1f895c6fe 159 /* Check the parameters */
mbed_official 340:28d1f895c6fe 160 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 340:28d1f895c6fe 161 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 340:28d1f895c6fe 162 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 340:28d1f895c6fe 163 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 340:28d1f895c6fe 164
mbed_official 340:28d1f895c6fe 165 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 340:28d1f895c6fe 166 {
mbed_official 631:825f75ca301e 167 /* Allocate lock resource and initialize it */
mbed_official 631:825f75ca301e 168 hwwdg->Lock = HAL_UNLOCKED;
mbed_official 631:825f75ca301e 169
mbed_official 340:28d1f895c6fe 170 /* Init the low level hardware */
mbed_official 340:28d1f895c6fe 171 HAL_WWDG_MspInit(hwwdg);
mbed_official 340:28d1f895c6fe 172 }
mbed_official 340:28d1f895c6fe 173
mbed_official 340:28d1f895c6fe 174 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 175 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 176
mbed_official 340:28d1f895c6fe 177 /* Set WWDG Prescaler and Window */
mbed_official 340:28d1f895c6fe 178 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 340:28d1f895c6fe 179
mbed_official 340:28d1f895c6fe 180 /* Set WWDG Counter */
mbed_official 340:28d1f895c6fe 181 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 340:28d1f895c6fe 182
mbed_official 340:28d1f895c6fe 183 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 184 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 185
mbed_official 340:28d1f895c6fe 186 /* Return function status */
mbed_official 340:28d1f895c6fe 187 return HAL_OK;
mbed_official 340:28d1f895c6fe 188 }
mbed_official 340:28d1f895c6fe 189
mbed_official 340:28d1f895c6fe 190 /**
mbed_official 631:825f75ca301e 191 * @brief DeInitialize the WWDG peripheral.
mbed_official 340:28d1f895c6fe 192 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 193 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 194 * @retval HAL status
mbed_official 340:28d1f895c6fe 195 */
mbed_official 340:28d1f895c6fe 196 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 197 {
mbed_official 631:825f75ca301e 198 /* Check the WWDG handle allocation */
mbed_official 631:825f75ca301e 199 if(hwwdg == NULL)
mbed_official 631:825f75ca301e 200 {
mbed_official 631:825f75ca301e 201 return HAL_ERROR;
mbed_official 631:825f75ca301e 202 }
mbed_official 631:825f75ca301e 203
mbed_official 340:28d1f895c6fe 204 /* Check the parameters */
mbed_official 340:28d1f895c6fe 205 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 340:28d1f895c6fe 206
mbed_official 340:28d1f895c6fe 207 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 208 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 209
mbed_official 340:28d1f895c6fe 210 /* DeInit the low level hardware */
mbed_official 340:28d1f895c6fe 211 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 340:28d1f895c6fe 212
mbed_official 340:28d1f895c6fe 213 /* Reset WWDG Control register */
mbed_official 340:28d1f895c6fe 214 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 340:28d1f895c6fe 215
mbed_official 340:28d1f895c6fe 216 /* Reset WWDG Configuration register */
mbed_official 340:28d1f895c6fe 217 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 340:28d1f895c6fe 218
mbed_official 340:28d1f895c6fe 219 /* Reset WWDG Status register */
mbed_official 340:28d1f895c6fe 220 hwwdg->Instance->SR = 0;
mbed_official 340:28d1f895c6fe 221
mbed_official 340:28d1f895c6fe 222 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 223 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 340:28d1f895c6fe 224
mbed_official 340:28d1f895c6fe 225 /* Release Lock */
mbed_official 340:28d1f895c6fe 226 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 227
mbed_official 340:28d1f895c6fe 228 /* Return function status */
mbed_official 340:28d1f895c6fe 229 return HAL_OK;
mbed_official 340:28d1f895c6fe 230 }
mbed_official 340:28d1f895c6fe 231
mbed_official 340:28d1f895c6fe 232 /**
mbed_official 631:825f75ca301e 233 * @brief Initialize the WWDG MSP.
mbed_official 340:28d1f895c6fe 234 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 235 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 236 * @retval None
mbed_official 340:28d1f895c6fe 237 */
mbed_official 340:28d1f895c6fe 238 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 239 {
mbed_official 631:825f75ca301e 240 /* NOTE: This function should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 241 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 340:28d1f895c6fe 242 */
mbed_official 340:28d1f895c6fe 243 }
mbed_official 340:28d1f895c6fe 244
mbed_official 340:28d1f895c6fe 245 /**
mbed_official 631:825f75ca301e 246 * @brief DeInitialize the WWDG MSP.
mbed_official 340:28d1f895c6fe 247 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 248 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 249 * @retval None
mbed_official 340:28d1f895c6fe 250 */
mbed_official 340:28d1f895c6fe 251 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 252 {
mbed_official 631:825f75ca301e 253 /* NOTE: This function should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 254 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 340:28d1f895c6fe 255 */
mbed_official 340:28d1f895c6fe 256 }
mbed_official 340:28d1f895c6fe 257
mbed_official 340:28d1f895c6fe 258 /**
mbed_official 340:28d1f895c6fe 259 * @}
mbed_official 340:28d1f895c6fe 260 */
mbed_official 340:28d1f895c6fe 261
mbed_official 340:28d1f895c6fe 262 /** @defgroup WWDG_Exported_Functions_Group2 IO operation functions
mbed_official 340:28d1f895c6fe 263 * @brief IO operation functions
mbed_official 340:28d1f895c6fe 264 *
mbed_official 340:28d1f895c6fe 265 @verbatim
mbed_official 340:28d1f895c6fe 266 ==============================================================================
mbed_official 340:28d1f895c6fe 267 ##### IO operation functions #####
mbed_official 340:28d1f895c6fe 268 ==============================================================================
mbed_official 340:28d1f895c6fe 269 [..]
mbed_official 340:28d1f895c6fe 270 This section provides functions allowing to:
mbed_official 340:28d1f895c6fe 271 (+) Start the WWDG.
mbed_official 340:28d1f895c6fe 272 (+) Refresh the WWDG.
mbed_official 631:825f75ca301e 273 (+) Handle WWDG interrupt request and associated function callback.
mbed_official 340:28d1f895c6fe 274
mbed_official 340:28d1f895c6fe 275 @endverbatim
mbed_official 340:28d1f895c6fe 276 * @{
mbed_official 340:28d1f895c6fe 277 */
mbed_official 340:28d1f895c6fe 278
mbed_official 340:28d1f895c6fe 279 /**
mbed_official 631:825f75ca301e 280 * @brief Start the WWDG.
mbed_official 340:28d1f895c6fe 281 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 282 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 283 * @retval HAL status
mbed_official 340:28d1f895c6fe 284 */
mbed_official 340:28d1f895c6fe 285 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 286 {
mbed_official 340:28d1f895c6fe 287 /* Process Locked */
mbed_official 340:28d1f895c6fe 288 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 289
mbed_official 340:28d1f895c6fe 290 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 291 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 292
mbed_official 340:28d1f895c6fe 293 /* Enable the peripheral */
mbed_official 340:28d1f895c6fe 294 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 340:28d1f895c6fe 295
mbed_official 340:28d1f895c6fe 296 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 297 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 298
mbed_official 340:28d1f895c6fe 299 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 300 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 301
mbed_official 340:28d1f895c6fe 302 /* Return function status */
mbed_official 340:28d1f895c6fe 303 return HAL_OK;
mbed_official 340:28d1f895c6fe 304 }
mbed_official 340:28d1f895c6fe 305
mbed_official 340:28d1f895c6fe 306 /**
mbed_official 631:825f75ca301e 307 * @brief Start the WWDG with interrupt enabled.
mbed_official 340:28d1f895c6fe 308 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 309 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 310 * @retval HAL status
mbed_official 340:28d1f895c6fe 311 */
mbed_official 340:28d1f895c6fe 312 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 313 {
mbed_official 340:28d1f895c6fe 314 /* Process Locked */
mbed_official 340:28d1f895c6fe 315 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 316
mbed_official 340:28d1f895c6fe 317 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 318 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 319
mbed_official 340:28d1f895c6fe 320 /* Enable the Early Wakeup Interrupt */
mbed_official 442:d2c15dda23c1 321 __HAL_WWDG_ENABLE_IT(hwwdg, WWDG_IT_EWI);
mbed_official 340:28d1f895c6fe 322
mbed_official 340:28d1f895c6fe 323 /* Enable the peripheral */
mbed_official 340:28d1f895c6fe 324 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 340:28d1f895c6fe 325
mbed_official 340:28d1f895c6fe 326 /* Return function status */
mbed_official 340:28d1f895c6fe 327 return HAL_OK;
mbed_official 340:28d1f895c6fe 328 }
mbed_official 340:28d1f895c6fe 329
mbed_official 340:28d1f895c6fe 330 /**
mbed_official 631:825f75ca301e 331 * @brief Refresh the WWDG.
mbed_official 340:28d1f895c6fe 332 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 333 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 334 * @param Counter: value of counter to put in WWDG counter
mbed_official 340:28d1f895c6fe 335 * @retval HAL status
mbed_official 340:28d1f895c6fe 336 */
mbed_official 340:28d1f895c6fe 337 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 340:28d1f895c6fe 338 {
mbed_official 340:28d1f895c6fe 339 /* Process Locked */
mbed_official 340:28d1f895c6fe 340 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 341
mbed_official 340:28d1f895c6fe 342 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 343 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 344
mbed_official 340:28d1f895c6fe 345 /* Check the parameters */
mbed_official 340:28d1f895c6fe 346 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 340:28d1f895c6fe 347
mbed_official 340:28d1f895c6fe 348 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 340:28d1f895c6fe 349 MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
mbed_official 340:28d1f895c6fe 350
mbed_official 340:28d1f895c6fe 351 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 352 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 353
mbed_official 340:28d1f895c6fe 354 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 355 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 356
mbed_official 340:28d1f895c6fe 357 /* Return function status */
mbed_official 340:28d1f895c6fe 358 return HAL_OK;
mbed_official 340:28d1f895c6fe 359 }
mbed_official 340:28d1f895c6fe 360
mbed_official 340:28d1f895c6fe 361 /**
mbed_official 631:825f75ca301e 362 * @brief Handle WWDG interrupt request.
mbed_official 340:28d1f895c6fe 363 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 340:28d1f895c6fe 364 * or data logging must be performed before the actual reset is generated.
mbed_official 442:d2c15dda23c1 365 * The EWI interrupt is enabled when calling HAL_WWDG_Start_IT function.
mbed_official 340:28d1f895c6fe 366 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 340:28d1f895c6fe 367 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 340:28d1f895c6fe 368 * be used to trigger specific actions (such as communications or data
mbed_official 340:28d1f895c6fe 369 * logging), before resetting the device.
mbed_official 340:28d1f895c6fe 370 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 371 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 372 * @retval None
mbed_official 340:28d1f895c6fe 373 */
mbed_official 340:28d1f895c6fe 374 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 375 {
mbed_official 442:d2c15dda23c1 376 /* Check if Early Wakeup Interrupt is enable */
mbed_official 442:d2c15dda23c1 377 if(__HAL_WWDG_GET_IT_SOURCE(hwwdg, WWDG_IT_EWI) != RESET)
mbed_official 340:28d1f895c6fe 378 {
mbed_official 631:825f75ca301e 379 /* Check if WWDG Early Wakeup Interrupt occurred */
mbed_official 442:d2c15dda23c1 380 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 442:d2c15dda23c1 381 {
mbed_official 442:d2c15dda23c1 382 /* Early Wakeup callback */
mbed_official 442:d2c15dda23c1 383 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 442:d2c15dda23c1 384
mbed_official 442:d2c15dda23c1 385 /* Change WWDG peripheral state */
mbed_official 442:d2c15dda23c1 386 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 442:d2c15dda23c1 387
mbed_official 442:d2c15dda23c1 388 /* Clear the WWDG Early Wakeup flag */
mbed_official 442:d2c15dda23c1 389 __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
mbed_official 442:d2c15dda23c1 390
mbed_official 442:d2c15dda23c1 391 /* Process Unlocked */
mbed_official 442:d2c15dda23c1 392 __HAL_UNLOCK(hwwdg);
mbed_official 442:d2c15dda23c1 393 }
mbed_official 442:d2c15dda23c1 394 }
mbed_official 340:28d1f895c6fe 395 }
mbed_official 340:28d1f895c6fe 396
mbed_official 340:28d1f895c6fe 397 /**
mbed_official 340:28d1f895c6fe 398 * @brief Early Wakeup WWDG callback.
mbed_official 340:28d1f895c6fe 399 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 400 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 401 * @retval None
mbed_official 340:28d1f895c6fe 402 */
mbed_official 340:28d1f895c6fe 403 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 340:28d1f895c6fe 404 {
mbed_official 631:825f75ca301e 405 /* NOTE: This function should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 406 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 340:28d1f895c6fe 407 */
mbed_official 340:28d1f895c6fe 408 }
mbed_official 340:28d1f895c6fe 409
mbed_official 340:28d1f895c6fe 410 /**
mbed_official 340:28d1f895c6fe 411 * @}
mbed_official 340:28d1f895c6fe 412 */
mbed_official 340:28d1f895c6fe 413
mbed_official 340:28d1f895c6fe 414 /** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 340:28d1f895c6fe 415 * @brief Peripheral State functions.
mbed_official 340:28d1f895c6fe 416 *
mbed_official 340:28d1f895c6fe 417 @verbatim
mbed_official 340:28d1f895c6fe 418 ==============================================================================
mbed_official 340:28d1f895c6fe 419 ##### Peripheral State functions #####
mbed_official 340:28d1f895c6fe 420 ==============================================================================
mbed_official 340:28d1f895c6fe 421 [..]
mbed_official 340:28d1f895c6fe 422 This subsection permits to get in run-time the status of the peripheral
mbed_official 340:28d1f895c6fe 423 and the data flow.
mbed_official 340:28d1f895c6fe 424
mbed_official 340:28d1f895c6fe 425 @endverbatim
mbed_official 340:28d1f895c6fe 426 * @{
mbed_official 340:28d1f895c6fe 427 */
mbed_official 340:28d1f895c6fe 428
mbed_official 340:28d1f895c6fe 429 /**
mbed_official 631:825f75ca301e 430 * @brief Return the WWDG handle state.
mbed_official 340:28d1f895c6fe 431 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 432 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 433 * @retval HAL state
mbed_official 340:28d1f895c6fe 434 */
mbed_official 340:28d1f895c6fe 435 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 436 {
mbed_official 340:28d1f895c6fe 437 return hwwdg->State;
mbed_official 340:28d1f895c6fe 438 }
mbed_official 340:28d1f895c6fe 439
mbed_official 340:28d1f895c6fe 440 /**
mbed_official 340:28d1f895c6fe 441 * @}
mbed_official 340:28d1f895c6fe 442 */
mbed_official 340:28d1f895c6fe 443
mbed_official 340:28d1f895c6fe 444 /**
mbed_official 340:28d1f895c6fe 445 * @}
mbed_official 340:28d1f895c6fe 446 */
mbed_official 340:28d1f895c6fe 447
mbed_official 340:28d1f895c6fe 448 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 340:28d1f895c6fe 449 /**
mbed_official 340:28d1f895c6fe 450 * @}
mbed_official 340:28d1f895c6fe 451 */
mbed_official 340:28d1f895c6fe 452
mbed_official 340:28d1f895c6fe 453 /**
mbed_official 340:28d1f895c6fe 454 * @}
mbed_official 340:28d1f895c6fe 455 */
mbed_official 340:28d1f895c6fe 456
mbed_official 340:28d1f895c6fe 457 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/