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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F401RE/stm32f4xx_hal_wwdg.c@87:085cde657901, 2014-02-08 (annotated)

Committer:
mbed_official
Date:
Sat Feb 08 19:45:06 2014 +0000
Revision:
87:085cde657901
Child:
106:ced8cbb51063
Synchronized with git revision 9272cdeb45ec7e6077641536509413da8fd2ebc2



Full URL: https://github.com/mbedmicro/mbed/commit/9272cdeb45ec7e6077641536509413da8fd2ebc2/



Add NUCLEO_F401RE, improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /**
mbed_official 87:085cde657901 2 ******************************************************************************
mbed_official 87:085cde657901 3 * @file stm32f4xx_hal_wwdg.c
mbed_official 87:085cde657901 4 * @author MCD Application Team
mbed_official 87:085cde657901 5 * @version V1.0.0RC2
mbed_official 87:085cde657901 6 * @date 04-February-2014
mbed_official 87:085cde657901 7 * @brief WWDG HAL module driver.
mbed_official 87:085cde657901 8 * This file provides firmware functions to manage the following
mbed_official 87:085cde657901 9 * functionalities of the Window Watchdog (WWDG) peripheral:
mbed_official 87:085cde657901 10 * + Initialization and de-initialization functions
mbed_official 87:085cde657901 11 * + IO operation functions
mbed_official 87:085cde657901 12 * + Peripheral State functions
mbed_official 87:085cde657901 13 @verbatim
mbed_official 87:085cde657901 14 ==============================================================================
mbed_official 87:085cde657901 15 ##### WWDG specific features #####
mbed_official 87:085cde657901 16 ==============================================================================
mbed_official 87:085cde657901 17 [..]
mbed_official 87:085cde657901 18 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 87:085cde657901 19 time period, unless the program refreshes the counter (downcounter)
mbed_official 87:085cde657901 20 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 87:085cde657901 21 value rolls over from 0x40 to 0x3F).
mbed_official 87:085cde657901 22
mbed_official 87:085cde657901 23 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 87:085cde657901 24 before the counter has reached the refresh window value. This
mbed_official 87:085cde657901 25 implies that the counter must be refreshed in a limited window.
mbed_official 87:085cde657901 26 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 87:085cde657901 27 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 87:085cde657901 28 reset occurs.
mbed_official 87:085cde657901 29 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 87:085cde657901 30 by a programmable prescaler.
mbed_official 87:085cde657901 31 (+) WWDG clock (Hz) = PCLK1 / (4096 * Prescaler)
mbed_official 87:085cde657901 32 (+) WWDG timeout (mS) = 1000 * Counter / WWDG clock
mbed_official 87:085cde657901 33 (+) WWDG Counter refresh is allowed between the following limits :
mbed_official 87:085cde657901 34 (++) min time (mS) = 1000 * (Counter – Window) / WWDG clock
mbed_official 87:085cde657901 35 (++) max time (mS) = 1000 * (Counter – 0x40) / WWDG clock
mbed_official 87:085cde657901 36
mbed_official 87:085cde657901 37 (+) Min-max timeout value at 50 MHz(PCLK1): 81.9 us / 41.9 ms
mbed_official 87:085cde657901 38
mbed_official 87:085cde657901 39
mbed_official 87:085cde657901 40 ##### How to use this driver #####
mbed_official 87:085cde657901 41 ==============================================================================
mbed_official 87:085cde657901 42 [..]
mbed_official 87:085cde657901 43 (+) Enable WWDG APB1 clock using __WWDG_CLK_ENABLE().
mbed_official 87:085cde657901 44 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 87:085cde657901 45 using HAL_WWDG_Init() function.
mbed_official 87:085cde657901 46 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 87:085cde657901 47 When the WWDG is enabled the counter value should be configured to
mbed_official 87:085cde657901 48 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 87:085cde657901 49 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 87:085cde657901 50 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 87:085cde657901 51 HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback is executed and user can
mbed_official 87:085cde657901 52 add his own code by customization of function pointer HAL_WWDG_WakeupCallback
mbed_official 87:085cde657901 53 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 87:085cde657901 54 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 87:085cde657901 55 intervals during normal operation to prevent an MCU reset, using
mbed_official 87:085cde657901 56 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 87:085cde657901 57 the counter is lower than the refresh window value already programmed.
mbed_official 87:085cde657901 58
mbed_official 87:085cde657901 59 *** WWDG HAL driver macros list ***
mbed_official 87:085cde657901 60 ==================================
mbed_official 87:085cde657901 61 [..]
mbed_official 87:085cde657901 62 Below the list of most used macros in WWDG HAL driver.
mbed_official 87:085cde657901 63
mbed_official 87:085cde657901 64 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 87:085cde657901 65 (+) __HAL_IWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 87:085cde657901 66 (+) __HAL_IWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 87:085cde657901 67 (+) __HAL_IWDG_RELOAD_COUNTER: Enables the WWDG early wakeup interrupt
mbed_official 87:085cde657901 68
mbed_official 87:085cde657901 69 @endverbatim
mbed_official 87:085cde657901 70 ******************************************************************************
mbed_official 87:085cde657901 71 * @attention
mbed_official 87:085cde657901 72 *
mbed_official 87:085cde657901 73 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 87:085cde657901 74 *
mbed_official 87:085cde657901 75 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 87:085cde657901 76 * are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 77 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 78 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 79 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 80 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 81 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 82 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 83 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 84 * without specific prior written permission.
mbed_official 87:085cde657901 85 *
mbed_official 87:085cde657901 86 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 87 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 88 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 89 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 90 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 91 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 93 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 94 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 95 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 96 *
mbed_official 87:085cde657901 97 ******************************************************************************
mbed_official 87:085cde657901 98 */
mbed_official 87:085cde657901 99
mbed_official 87:085cde657901 100 /* Includes ------------------------------------------------------------------*/
mbed_official 87:085cde657901 101 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 102
mbed_official 87:085cde657901 103 /** @addtogroup STM32F4xx_HAL_Driver
mbed_official 87:085cde657901 104 * @{
mbed_official 87:085cde657901 105 */
mbed_official 87:085cde657901 106
mbed_official 87:085cde657901 107 /** @defgroup WWDG
mbed_official 87:085cde657901 108 * @brief WWDG HAL module driver.
mbed_official 87:085cde657901 109 * @{
mbed_official 87:085cde657901 110 */
mbed_official 87:085cde657901 111
mbed_official 87:085cde657901 112 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 87:085cde657901 113
mbed_official 87:085cde657901 114 /* Private typedef -----------------------------------------------------------*/
mbed_official 87:085cde657901 115 /* Private define ------------------------------------------------------------*/
mbed_official 87:085cde657901 116 /* Private macro -------------------------------------------------------------*/
mbed_official 87:085cde657901 117 /* Private variables ---------------------------------------------------------*/
mbed_official 87:085cde657901 118 /* Private function prototypes -----------------------------------------------*/
mbed_official 87:085cde657901 119 /* Private functions ---------------------------------------------------------*/
mbed_official 87:085cde657901 120
mbed_official 87:085cde657901 121 /** @defgroup WWDG_Private_Functions
mbed_official 87:085cde657901 122 * @{
mbed_official 87:085cde657901 123 */
mbed_official 87:085cde657901 124
mbed_official 87:085cde657901 125 /** @defgroup WWDG_Group1 Initialization and de-initialization functions
mbed_official 87:085cde657901 126 * @brief Initialization and Configuration functions.
mbed_official 87:085cde657901 127 *
mbed_official 87:085cde657901 128 @verbatim
mbed_official 87:085cde657901 129 ==============================================================================
mbed_official 87:085cde657901 130 ##### Initialization and de-initialization functions #####
mbed_official 87:085cde657901 131 ==============================================================================
mbed_official 87:085cde657901 132 [..]
mbed_official 87:085cde657901 133 This section provides functions allowing to:
mbed_official 87:085cde657901 134 (+) Initialize the WWDG according to the specified parameters
mbed_official 87:085cde657901 135 in the WWDG_InitTypeDef and create the associated handle
mbed_official 87:085cde657901 136 (+) DeInitialize the WWDG peripheral
mbed_official 87:085cde657901 137 (+) Initialize the WWDG MSP
mbed_official 87:085cde657901 138 (+) DeInitialize the WWDG MSP
mbed_official 87:085cde657901 139
mbed_official 87:085cde657901 140 @endverbatim
mbed_official 87:085cde657901 141 * @{
mbed_official 87:085cde657901 142 */
mbed_official 87:085cde657901 143
mbed_official 87:085cde657901 144 /**
mbed_official 87:085cde657901 145 * @brief Initializes the WWDG according to the specified
mbed_official 87:085cde657901 146 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 87:085cde657901 147 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 148 * @retval HAL status
mbed_official 87:085cde657901 149 */
mbed_official 87:085cde657901 150 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 151 {
mbed_official 87:085cde657901 152 uint32_t tmp = 0;
mbed_official 87:085cde657901 153
mbed_official 87:085cde657901 154 /* Check the WWDG handle allocation */
mbed_official 87:085cde657901 155 if(hwwdg == NULL)
mbed_official 87:085cde657901 156 {
mbed_official 87:085cde657901 157 return HAL_ERROR;
mbed_official 87:085cde657901 158 }
mbed_official 87:085cde657901 159
mbed_official 87:085cde657901 160 /* Check the parameters */
mbed_official 87:085cde657901 161 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 87:085cde657901 162 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 87:085cde657901 163 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 87:085cde657901 164
mbed_official 87:085cde657901 165 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 87:085cde657901 166 {
mbed_official 87:085cde657901 167 /* Init the low level hardware */
mbed_official 87:085cde657901 168 HAL_WWDG_MspInit(hwwdg);
mbed_official 87:085cde657901 169 }
mbed_official 87:085cde657901 170
mbed_official 87:085cde657901 171 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 172 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 173
mbed_official 87:085cde657901 174 /* Set WWDG Prescaler and Window */
mbed_official 87:085cde657901 175 /* Get the CFR register value */
mbed_official 87:085cde657901 176 tmp = hwwdg->Instance->CFR;
mbed_official 87:085cde657901 177
mbed_official 87:085cde657901 178 /* Clear WDGTB[1:0] and W[6:0] bits */
mbed_official 87:085cde657901 179 tmp &= ((uint32_t)~(WWDG_CFR_WDGTB | WWDG_CFR_W));
mbed_official 87:085cde657901 180
mbed_official 87:085cde657901 181 /* Prepare the WWDG Prescaler and Window parameters */
mbed_official 87:085cde657901 182 tmp |= hwwdg->Init.Prescaler | hwwdg->Init.Window;
mbed_official 87:085cde657901 183
mbed_official 87:085cde657901 184 /* Write to WWDG CFR */
mbed_official 87:085cde657901 185 hwwdg->Instance->CFR = tmp;
mbed_official 87:085cde657901 186
mbed_official 87:085cde657901 187 /* Set WWDG Counter */
mbed_official 87:085cde657901 188 /* Get the CR register value */
mbed_official 87:085cde657901 189 tmp = hwwdg->Instance->CR;
mbed_official 87:085cde657901 190
mbed_official 87:085cde657901 191 /* Clear T[6:0] bits */
mbed_official 87:085cde657901 192 tmp &= ((uint32_t)~(WWDG_CR_T));
mbed_official 87:085cde657901 193
mbed_official 87:085cde657901 194 /* Prepare the WWDG Counter parameter */
mbed_official 87:085cde657901 195 tmp |= (hwwdg->Init.Counter);
mbed_official 87:085cde657901 196
mbed_official 87:085cde657901 197 /* Write to WWDG CR */
mbed_official 87:085cde657901 198 hwwdg->Instance->CR = tmp;
mbed_official 87:085cde657901 199
mbed_official 87:085cde657901 200 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 201 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 202
mbed_official 87:085cde657901 203 /* Return function status */
mbed_official 87:085cde657901 204 return HAL_OK;
mbed_official 87:085cde657901 205 }
mbed_official 87:085cde657901 206
mbed_official 87:085cde657901 207 /**
mbed_official 87:085cde657901 208 * @brief DeInitializes the WWDG peripheral.
mbed_official 87:085cde657901 209 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 210 * @retval HAL status
mbed_official 87:085cde657901 211 */
mbed_official 87:085cde657901 212 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 213 {
mbed_official 87:085cde657901 214 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 215 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 216
mbed_official 87:085cde657901 217 /* DeInit the low level hardware */
mbed_official 87:085cde657901 218 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 87:085cde657901 219
mbed_official 87:085cde657901 220 /* Reset WWDG Control register */
mbed_official 87:085cde657901 221 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 87:085cde657901 222
mbed_official 87:085cde657901 223 /* Reset WWDG Configuration register */
mbed_official 87:085cde657901 224 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 87:085cde657901 225
mbed_official 87:085cde657901 226 /* Reset WWDG Status register */
mbed_official 87:085cde657901 227 hwwdg->Instance->SR = 0;
mbed_official 87:085cde657901 228
mbed_official 87:085cde657901 229 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 230 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 87:085cde657901 231
mbed_official 87:085cde657901 232 /* Return function status */
mbed_official 87:085cde657901 233 return HAL_OK;
mbed_official 87:085cde657901 234 }
mbed_official 87:085cde657901 235
mbed_official 87:085cde657901 236 /**
mbed_official 87:085cde657901 237 * @brief Initializes the WWDG MSP.
mbed_official 87:085cde657901 238 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 239 * @retval None
mbed_official 87:085cde657901 240 */
mbed_official 87:085cde657901 241 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 242 {
mbed_official 87:085cde657901 243 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 244 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 87:085cde657901 245 */
mbed_official 87:085cde657901 246 }
mbed_official 87:085cde657901 247
mbed_official 87:085cde657901 248 /**
mbed_official 87:085cde657901 249 * @brief DeInitializes the WWDG MSP.
mbed_official 87:085cde657901 250 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 251 * @retval None
mbed_official 87:085cde657901 252 */
mbed_official 87:085cde657901 253 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 254 {
mbed_official 87:085cde657901 255 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 256 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 87:085cde657901 257 */
mbed_official 87:085cde657901 258 }
mbed_official 87:085cde657901 259
mbed_official 87:085cde657901 260 /**
mbed_official 87:085cde657901 261 * @}
mbed_official 87:085cde657901 262 */
mbed_official 87:085cde657901 263
mbed_official 87:085cde657901 264 /** @defgroup WWDG_Group2 IO operation functions
mbed_official 87:085cde657901 265 * @brief IO operation functions
mbed_official 87:085cde657901 266 *
mbed_official 87:085cde657901 267 @verbatim
mbed_official 87:085cde657901 268 ==============================================================================
mbed_official 87:085cde657901 269 ##### IO operation functions #####
mbed_official 87:085cde657901 270 ==============================================================================
mbed_official 87:085cde657901 271 [..]
mbed_official 87:085cde657901 272 This section provides functions allowing to:
mbed_official 87:085cde657901 273 (+) Start the WWDG.
mbed_official 87:085cde657901 274 (+) Refresh the WWDG.
mbed_official 87:085cde657901 275 (+) Handle WWDG interrupt request.
mbed_official 87:085cde657901 276
mbed_official 87:085cde657901 277 @endverbatim
mbed_official 87:085cde657901 278 * @{
mbed_official 87:085cde657901 279 */
mbed_official 87:085cde657901 280
mbed_official 87:085cde657901 281 /**
mbed_official 87:085cde657901 282 * @brief Starts the WWDG.
mbed_official 87:085cde657901 283 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 284 * @retval HAL status
mbed_official 87:085cde657901 285 */
mbed_official 87:085cde657901 286 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 287 {
mbed_official 87:085cde657901 288 /* Process Locked */
mbed_official 87:085cde657901 289 __HAL_LOCK(hwwdg);
mbed_official 87:085cde657901 290
mbed_official 87:085cde657901 291 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 292 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 293
mbed_official 87:085cde657901 294 /* Enable the peripheral */
mbed_official 87:085cde657901 295 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 87:085cde657901 296
mbed_official 87:085cde657901 297 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 298 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 299
mbed_official 87:085cde657901 300 /* Process Unlocked */
mbed_official 87:085cde657901 301 __HAL_UNLOCK(hwwdg);
mbed_official 87:085cde657901 302
mbed_official 87:085cde657901 303 /* Return function status */
mbed_official 87:085cde657901 304 return HAL_OK;
mbed_official 87:085cde657901 305 }
mbed_official 87:085cde657901 306
mbed_official 87:085cde657901 307 /**
mbed_official 87:085cde657901 308 * @brief Starts the WWDG with interrupt enabled.
mbed_official 87:085cde657901 309 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 310 * @retval HAL status
mbed_official 87:085cde657901 311 */
mbed_official 87:085cde657901 312 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 313 {
mbed_official 87:085cde657901 314 /* Process Locked */
mbed_official 87:085cde657901 315 __HAL_LOCK(hwwdg);
mbed_official 87:085cde657901 316
mbed_official 87:085cde657901 317 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 318 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 319
mbed_official 87:085cde657901 320 /* Enable the Early Wakeup Interrupt */
mbed_official 87:085cde657901 321 __HAL_WWDG_ENABLE_IT(WWDG_IT_EWI);
mbed_official 87:085cde657901 322
mbed_official 87:085cde657901 323 /* Enable the peripheral */
mbed_official 87:085cde657901 324 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 87:085cde657901 325
mbed_official 87:085cde657901 326 /* Return function status */
mbed_official 87:085cde657901 327 return HAL_OK;
mbed_official 87:085cde657901 328 }
mbed_official 87:085cde657901 329
mbed_official 87:085cde657901 330 /**
mbed_official 87:085cde657901 331 * @brief Refreshes the WWDG.
mbed_official 87:085cde657901 332 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 333 * @retval HAL status
mbed_official 87:085cde657901 334 */
mbed_official 87:085cde657901 335 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 87:085cde657901 336 {
mbed_official 87:085cde657901 337 /* Process Locked */
mbed_official 87:085cde657901 338 __HAL_LOCK(hwwdg);
mbed_official 87:085cde657901 339
mbed_official 87:085cde657901 340 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 341 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 87:085cde657901 342
mbed_official 87:085cde657901 343 /* Check the parameters */
mbed_official 87:085cde657901 344 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 87:085cde657901 345
mbed_official 87:085cde657901 346 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 87:085cde657901 347 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, Counter);
mbed_official 87:085cde657901 348
mbed_official 87:085cde657901 349 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 350 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 351
mbed_official 87:085cde657901 352 /* Process Unlocked */
mbed_official 87:085cde657901 353 __HAL_UNLOCK(hwwdg);
mbed_official 87:085cde657901 354
mbed_official 87:085cde657901 355 /* Return function status */
mbed_official 87:085cde657901 356 return HAL_OK;
mbed_official 87:085cde657901 357 }
mbed_official 87:085cde657901 358
mbed_official 87:085cde657901 359 /**
mbed_official 87:085cde657901 360 * @brief Handles WWDG interrupt request.
mbed_official 87:085cde657901 361 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 87:085cde657901 362 * or data logging must be performed before the actual reset is generated.
mbed_official 87:085cde657901 363 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 87:085cde657901 364 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 87:085cde657901 365 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 87:085cde657901 366 * be used to trigger specific actions (such as communications or data
mbed_official 87:085cde657901 367 * logging), before resetting the device.
mbed_official 87:085cde657901 368 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 369 * @retval None
mbed_official 87:085cde657901 370 */
mbed_official 87:085cde657901 371 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 372 {
mbed_official 87:085cde657901 373 /* WWDG Early Wakeup Interrupt occurred */
mbed_official 87:085cde657901 374 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 87:085cde657901 375 {
mbed_official 87:085cde657901 376 /* Early Wakeup callback */
mbed_official 87:085cde657901 377 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 87:085cde657901 378
mbed_official 87:085cde657901 379 /* Change WWDG peripheral state */
mbed_official 87:085cde657901 380 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 87:085cde657901 381
mbed_official 87:085cde657901 382 /* Clear the WWDG Data Ready flag */
mbed_official 87:085cde657901 383 __HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
mbed_official 87:085cde657901 384
mbed_official 87:085cde657901 385 /* Process Unlocked */
mbed_official 87:085cde657901 386 __HAL_UNLOCK(hwwdg);
mbed_official 87:085cde657901 387 }
mbed_official 87:085cde657901 388 }
mbed_official 87:085cde657901 389
mbed_official 87:085cde657901 390 /**
mbed_official 87:085cde657901 391 * @brief Early Wakeup WWDG callback.
mbed_official 87:085cde657901 392 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 393 * @retval None
mbed_official 87:085cde657901 394 */
mbed_official 87:085cde657901 395 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 87:085cde657901 396 {
mbed_official 87:085cde657901 397 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 87:085cde657901 398 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 87:085cde657901 399 */
mbed_official 87:085cde657901 400 }
mbed_official 87:085cde657901 401
mbed_official 87:085cde657901 402 /**
mbed_official 87:085cde657901 403 * @}
mbed_official 87:085cde657901 404 */
mbed_official 87:085cde657901 405
mbed_official 87:085cde657901 406 /** @defgroup WWDG_Group3 Peripheral State functions
mbed_official 87:085cde657901 407 * @brief Peripheral State functions.
mbed_official 87:085cde657901 408 *
mbed_official 87:085cde657901 409 @verbatim
mbed_official 87:085cde657901 410 ==============================================================================
mbed_official 87:085cde657901 411 ##### Peripheral State functions #####
mbed_official 87:085cde657901 412 ==============================================================================
mbed_official 87:085cde657901 413 [..]
mbed_official 87:085cde657901 414 This subsection permits to get in run-time the status of the peripheral
mbed_official 87:085cde657901 415 and the data flow.
mbed_official 87:085cde657901 416
mbed_official 87:085cde657901 417 @endverbatim
mbed_official 87:085cde657901 418 * @{
mbed_official 87:085cde657901 419 */
mbed_official 87:085cde657901 420
mbed_official 87:085cde657901 421 /**
mbed_official 87:085cde657901 422 * @brief Returns the WWDG state.
mbed_official 87:085cde657901 423 * @param hwwdg: WWDG handle
mbed_official 87:085cde657901 424 * @retval HAL state
mbed_official 87:085cde657901 425 */
mbed_official 87:085cde657901 426 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 87:085cde657901 427 {
mbed_official 87:085cde657901 428 return hwwdg->State;
mbed_official 87:085cde657901 429 }
mbed_official 87:085cde657901 430
mbed_official 87:085cde657901 431 /**
mbed_official 87:085cde657901 432 * @}
mbed_official 87:085cde657901 433 */
mbed_official 87:085cde657901 434
mbed_official 87:085cde657901 435 /**
mbed_official 87:085cde657901 436 * @}
mbed_official 87:085cde657901 437 */
mbed_official 87:085cde657901 438
mbed_official 87:085cde657901 439 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 87:085cde657901 440 /**
mbed_official 87:085cde657901 441 * @}
mbed_official 87:085cde657901 442 */
mbed_official 87:085cde657901 443
mbed_official 87:085cde657901 444 /**
mbed_official 87:085cde657901 445 * @}
mbed_official 87:085cde657901 446 */
mbed_official 87:085cde657901 447
mbed_official 87:085cde657901 448 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/