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targets/cmsis/TARGET_STM/TARGET_STM32L1/stm32l1xx_hal_wwdg.c@592:5e2eb8beba71, 2015-07-10 (annotated)

Committer:
dcnichols
Date:
Fri Jul 10 17:36:27 2015 +0000
Revision:
592:5e2eb8beba71
Parent:
395:83f921546702 
updating to latest mbed-src

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 354:e67efb2aab0e 1 /**
mbed_official 354:e67efb2aab0e 2 ******************************************************************************
mbed_official 354:e67efb2aab0e 3 * @file stm32l1xx_hal_wwdg.c
mbed_official 354:e67efb2aab0e 4 * @author MCD Application Team
mbed_official 354:e67efb2aab0e 5 * @version V1.0.0
mbed_official 354:e67efb2aab0e 6 * @date 5-September-2014
mbed_official 354:e67efb2aab0e 7 * @brief WWDG HAL module driver.
mbed_official 354:e67efb2aab0e 8 * This file provides firmware functions to manage the following
mbed_official 354:e67efb2aab0e 9 * functionalities of the Window Watchdog (WWDG) peripheral:
mbed_official 354:e67efb2aab0e 10 * + Initialization and de-initialization functions
mbed_official 354:e67efb2aab0e 11 * + IO operation functions
mbed_official 354:e67efb2aab0e 12 * + Peripheral State functions
mbed_official 354:e67efb2aab0e 13 @verbatim
mbed_official 354:e67efb2aab0e 14 ==============================================================================
mbed_official 354:e67efb2aab0e 15 ##### WWDG specific features #####
mbed_official 354:e67efb2aab0e 16 ==============================================================================
mbed_official 354:e67efb2aab0e 17 [..]
mbed_official 354:e67efb2aab0e 18 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 354:e67efb2aab0e 19 time period, unless the program refreshes the counter (downcounter)
mbed_official 354:e67efb2aab0e 20 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 354:e67efb2aab0e 21 value rolls over from 0x40 to 0x3F).
mbed_official 354:e67efb2aab0e 22
mbed_official 354:e67efb2aab0e 23 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 354:e67efb2aab0e 24 before the counter has reached the refresh window value. This
mbed_official 354:e67efb2aab0e 25 implies that the counter must be refreshed in a limited window.
mbed_official 354:e67efb2aab0e 26 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 354:e67efb2aab0e 27 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 354:e67efb2aab0e 28 reset occurs.
mbed_official 354:e67efb2aab0e 29 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 354:e67efb2aab0e 30 by a programmable prescaler.
mbed_official 354:e67efb2aab0e 31 (+) WWDG clock (Hz) = PCLK1 / (4096 * Prescaler)
mbed_official 354:e67efb2aab0e 32 (+) WWDG timeout (mS) = 1000 * Counter / WWDG clock
mbed_official 354:e67efb2aab0e 33 (+) WWDG Counter refresh is allowed between the following limits :
mbed_official 354:e67efb2aab0e 34 (++) min time (mS) = 1000 * (Counter – Window) / WWDG clock
mbed_official 354:e67efb2aab0e 35 (++) max time (mS) = 1000 * (Counter – 0x40) / WWDG clock
mbed_official 354:e67efb2aab0e 36
mbed_official 354:e67efb2aab0e 37 (+) Min-max timeout value at @32MHz (PCLK1): ~128us / ~65.6ms.
mbed_official 354:e67efb2aab0e 38
mbed_official 354:e67efb2aab0e 39
mbed_official 354:e67efb2aab0e 40 ##### How to use this driver #####
mbed_official 354:e67efb2aab0e 41 ==============================================================================
mbed_official 354:e67efb2aab0e 42 [..]
mbed_official 354:e67efb2aab0e 43 (+) Enable WWDG APB1 clock using __WWDG_CLK_ENABLE().
mbed_official 354:e67efb2aab0e 44 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 354:e67efb2aab0e 45 using HAL_WWDG_Init() function.
mbed_official 354:e67efb2aab0e 46 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 354:e67efb2aab0e 47 When the WWDG is enabled the counter value should be configured to
mbed_official 354:e67efb2aab0e 48 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 354:e67efb2aab0e 49 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 354:e67efb2aab0e 50 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 354:e67efb2aab0e 51 HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback is executed and user can
mbed_official 354:e67efb2aab0e 52 add his own code by customization of function pointer HAL_WWDG_WakeupCallback
mbed_official 354:e67efb2aab0e 53 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 354:e67efb2aab0e 54 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 354:e67efb2aab0e 55 intervals during normal operation to prevent an MCU reset, using
mbed_official 354:e67efb2aab0e 56 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 354:e67efb2aab0e 57 the counter is lower than the refresh window value already programmed.
mbed_official 354:e67efb2aab0e 58
mbed_official 354:e67efb2aab0e 59 *** WWDG HAL driver macros list ***
mbed_official 354:e67efb2aab0e 60 ==================================
mbed_official 354:e67efb2aab0e 61 [..]
mbed_official 354:e67efb2aab0e 62 Below the list of most used macros in WWDG HAL driver.
mbed_official 354:e67efb2aab0e 63
mbed_official 354:e67efb2aab0e 64 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 354:e67efb2aab0e 65 (+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 354:e67efb2aab0e 66 (+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 354:e67efb2aab0e 67 (+) __HAL_WWDG_ENABLE_IT: Enables the WWDG early wakeup interrupt
mbed_official 354:e67efb2aab0e 68
mbed_official 354:e67efb2aab0e 69 @endverbatim
mbed_official 354:e67efb2aab0e 70 ******************************************************************************
mbed_official 354:e67efb2aab0e 71 * @attention
mbed_official 354:e67efb2aab0e 72 *
mbed_official 354:e67efb2aab0e 73 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 354:e67efb2aab0e 74 *
mbed_official 354:e67efb2aab0e 75 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 354:e67efb2aab0e 76 * are permitted provided that the following conditions are met:
mbed_official 354:e67efb2aab0e 77 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 354:e67efb2aab0e 78 * this list of conditions and the following disclaimer.
mbed_official 354:e67efb2aab0e 79 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 354:e67efb2aab0e 80 * this list of conditions and the following disclaimer in the documentation
mbed_official 354:e67efb2aab0e 81 * and/or other materials provided with the distribution.
mbed_official 354:e67efb2aab0e 82 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 354:e67efb2aab0e 83 * may be used to endorse or promote products derived from this software
mbed_official 354:e67efb2aab0e 84 * without specific prior written permission.
mbed_official 354:e67efb2aab0e 85 *
mbed_official 354:e67efb2aab0e 86 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 354:e67efb2aab0e 87 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 354:e67efb2aab0e 88 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 354:e67efb2aab0e 89 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 354:e67efb2aab0e 90 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 354:e67efb2aab0e 91 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 354:e67efb2aab0e 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 354:e67efb2aab0e 93 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 354:e67efb2aab0e 94 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 354:e67efb2aab0e 95 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 354:e67efb2aab0e 96 *
mbed_official 354:e67efb2aab0e 97 ******************************************************************************
mbed_official 354:e67efb2aab0e 98 */
mbed_official 354:e67efb2aab0e 99
mbed_official 354:e67efb2aab0e 100 /* Includes ------------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 101 #include "stm32l1xx_hal.h"
mbed_official 354:e67efb2aab0e 102
mbed_official 354:e67efb2aab0e 103 /** @addtogroup STM32L1xx_HAL_Driver
mbed_official 354:e67efb2aab0e 104 * @{
mbed_official 354:e67efb2aab0e 105 */
mbed_official 354:e67efb2aab0e 106
mbed_official 354:e67efb2aab0e 107 /** @defgroup WWDG WWDG
mbed_official 354:e67efb2aab0e 108 * @brief WWDG HAL module driver.
mbed_official 354:e67efb2aab0e 109 * @{
mbed_official 354:e67efb2aab0e 110 */
mbed_official 354:e67efb2aab0e 111
mbed_official 354:e67efb2aab0e 112 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 354:e67efb2aab0e 113
mbed_official 354:e67efb2aab0e 114 /* Private typedef -----------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 115 /* Private define ------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 116 /* Private macro -------------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 117 /* Private variables ---------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 118 /* Private function prototypes -----------------------------------------------*/
mbed_official 354:e67efb2aab0e 119 /* Private functions ---------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 120
mbed_official 354:e67efb2aab0e 121 /** @defgroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 354:e67efb2aab0e 122 * @{
mbed_official 354:e67efb2aab0e 123 */
mbed_official 354:e67efb2aab0e 124
mbed_official 354:e67efb2aab0e 125 /** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 354:e67efb2aab0e 126 * @brief Initialization and Configuration functions.
mbed_official 354:e67efb2aab0e 127 *
mbed_official 354:e67efb2aab0e 128 @verbatim
mbed_official 354:e67efb2aab0e 129 ==============================================================================
mbed_official 354:e67efb2aab0e 130 ##### Initialization and de-initialization functions #####
mbed_official 354:e67efb2aab0e 131 ==============================================================================
mbed_official 354:e67efb2aab0e 132 [..]
mbed_official 354:e67efb2aab0e 133 This section provides functions allowing to:
mbed_official 354:e67efb2aab0e 134 (+) Initialize the WWDG according to the specified parameters
mbed_official 354:e67efb2aab0e 135 in the WWDG_InitTypeDef and create the associated handle
mbed_official 354:e67efb2aab0e 136 (+) DeInitialize the WWDG peripheral
mbed_official 354:e67efb2aab0e 137 (+) Initialize the WWDG MSP
mbed_official 354:e67efb2aab0e 138 (+) DeInitialize the WWDG MSP
mbed_official 354:e67efb2aab0e 139
mbed_official 354:e67efb2aab0e 140 @endverbatim
mbed_official 354:e67efb2aab0e 141 * @{
mbed_official 354:e67efb2aab0e 142 */
mbed_official 354:e67efb2aab0e 143
mbed_official 354:e67efb2aab0e 144 /**
mbed_official 354:e67efb2aab0e 145 * @brief Initializes the WWDG according to the specified
mbed_official 354:e67efb2aab0e 146 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 354:e67efb2aab0e 147 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 148 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 149 * @retval HAL status
mbed_official 354:e67efb2aab0e 150 */
mbed_official 354:e67efb2aab0e 151 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 152 {
mbed_official 354:e67efb2aab0e 153 /* Check the WWDG handle allocation */
mbed_official 354:e67efb2aab0e 154 if(hwwdg == HAL_NULL)
mbed_official 354:e67efb2aab0e 155 {
mbed_official 354:e67efb2aab0e 156 return HAL_ERROR;
mbed_official 354:e67efb2aab0e 157 }
mbed_official 354:e67efb2aab0e 158
mbed_official 354:e67efb2aab0e 159 /* Check the parameters */
mbed_official 354:e67efb2aab0e 160 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 354:e67efb2aab0e 161 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 354:e67efb2aab0e 162 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 354:e67efb2aab0e 163 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 354:e67efb2aab0e 164
mbed_official 354:e67efb2aab0e 165 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 354:e67efb2aab0e 166 {
mbed_official 354:e67efb2aab0e 167 /* Init the low level hardware */
mbed_official 354:e67efb2aab0e 168 HAL_WWDG_MspInit(hwwdg);
mbed_official 354:e67efb2aab0e 169 }
mbed_official 354:e67efb2aab0e 170
mbed_official 354:e67efb2aab0e 171 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 172 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 173
mbed_official 354:e67efb2aab0e 174 /* Set WWDG Prescaler and Window */
mbed_official 354:e67efb2aab0e 175 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 354:e67efb2aab0e 176
mbed_official 354:e67efb2aab0e 177 /* Set WWDG Counter */
mbed_official 354:e67efb2aab0e 178 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 354:e67efb2aab0e 179
mbed_official 354:e67efb2aab0e 180 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 181 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 182
mbed_official 354:e67efb2aab0e 183 /* Return function status */
mbed_official 354:e67efb2aab0e 184 return HAL_OK;
mbed_official 354:e67efb2aab0e 185 }
mbed_official 354:e67efb2aab0e 186
mbed_official 354:e67efb2aab0e 187 /**
mbed_official 354:e67efb2aab0e 188 * @brief DeInitializes the WWDG peripheral.
mbed_official 354:e67efb2aab0e 189 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 190 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 191 * @retval HAL status
mbed_official 354:e67efb2aab0e 192 */
mbed_official 354:e67efb2aab0e 193 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 194 {
mbed_official 354:e67efb2aab0e 195 /* Check the parameters */
mbed_official 354:e67efb2aab0e 196 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 354:e67efb2aab0e 197
mbed_official 354:e67efb2aab0e 198 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 199 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 200
mbed_official 354:e67efb2aab0e 201 /* DeInit the low level hardware */
mbed_official 354:e67efb2aab0e 202 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 354:e67efb2aab0e 203
mbed_official 354:e67efb2aab0e 204 /* Reset WWDG Control register */
mbed_official 354:e67efb2aab0e 205 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 354:e67efb2aab0e 206
mbed_official 354:e67efb2aab0e 207 /* Reset WWDG Configuration register */
mbed_official 354:e67efb2aab0e 208 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 354:e67efb2aab0e 209
mbed_official 354:e67efb2aab0e 210 /* Reset WWDG Status register */
mbed_official 354:e67efb2aab0e 211 hwwdg->Instance->SR = 0;
mbed_official 354:e67efb2aab0e 212
mbed_official 354:e67efb2aab0e 213 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 214 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 354:e67efb2aab0e 215
mbed_official 354:e67efb2aab0e 216 /* Release Lock */
mbed_official 354:e67efb2aab0e 217 __HAL_UNLOCK(hwwdg);
mbed_official 354:e67efb2aab0e 218
mbed_official 354:e67efb2aab0e 219 /* Return function status */
mbed_official 354:e67efb2aab0e 220 return HAL_OK;
mbed_official 354:e67efb2aab0e 221 }
mbed_official 354:e67efb2aab0e 222
mbed_official 354:e67efb2aab0e 223 /**
mbed_official 354:e67efb2aab0e 224 * @brief Initializes the WWDG MSP.
mbed_official 354:e67efb2aab0e 225 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 226 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 227 * @retval None
mbed_official 354:e67efb2aab0e 228 */
mbed_official 354:e67efb2aab0e 229 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 230 {
mbed_official 354:e67efb2aab0e 231 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 354:e67efb2aab0e 232 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 354:e67efb2aab0e 233 */
mbed_official 354:e67efb2aab0e 234 }
mbed_official 354:e67efb2aab0e 235
mbed_official 354:e67efb2aab0e 236 /**
mbed_official 354:e67efb2aab0e 237 * @brief DeInitializes the WWDG MSP.
mbed_official 354:e67efb2aab0e 238 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 239 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 240 * @retval None
mbed_official 354:e67efb2aab0e 241 */
mbed_official 354:e67efb2aab0e 242 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 243 {
mbed_official 354:e67efb2aab0e 244 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 354:e67efb2aab0e 245 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 354:e67efb2aab0e 246 */
mbed_official 354:e67efb2aab0e 247 }
mbed_official 354:e67efb2aab0e 248
mbed_official 354:e67efb2aab0e 249 /**
mbed_official 354:e67efb2aab0e 250 * @}
mbed_official 354:e67efb2aab0e 251 */
mbed_official 354:e67efb2aab0e 252
mbed_official 354:e67efb2aab0e 253 /** @defgroup WWDG_Exported_Functions_Group2 IO operation functions
mbed_official 354:e67efb2aab0e 254 * @brief IO operation functions
mbed_official 354:e67efb2aab0e 255 *
mbed_official 354:e67efb2aab0e 256 @verbatim
mbed_official 354:e67efb2aab0e 257 ==============================================================================
mbed_official 354:e67efb2aab0e 258 ##### IO operation functions #####
mbed_official 354:e67efb2aab0e 259 ==============================================================================
mbed_official 354:e67efb2aab0e 260 [..]
mbed_official 354:e67efb2aab0e 261 This section provides functions allowing to:
mbed_official 354:e67efb2aab0e 262 (+) Start the WWDG.
mbed_official 354:e67efb2aab0e 263 (+) Refresh the WWDG.
mbed_official 354:e67efb2aab0e 264 (+) Handle WWDG interrupt request.
mbed_official 354:e67efb2aab0e 265
mbed_official 354:e67efb2aab0e 266 @endverbatim
mbed_official 354:e67efb2aab0e 267 * @{
mbed_official 354:e67efb2aab0e 268 */
mbed_official 354:e67efb2aab0e 269
mbed_official 354:e67efb2aab0e 270 /**
mbed_official 354:e67efb2aab0e 271 * @brief Starts the WWDG.
mbed_official 354:e67efb2aab0e 272 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 273 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 274 * @retval HAL status
mbed_official 354:e67efb2aab0e 275 */
mbed_official 354:e67efb2aab0e 276 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 277 {
mbed_official 354:e67efb2aab0e 278 /* Process Locked */
mbed_official 354:e67efb2aab0e 279 __HAL_LOCK(hwwdg);
mbed_official 354:e67efb2aab0e 280
mbed_official 354:e67efb2aab0e 281 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 282 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 283
mbed_official 354:e67efb2aab0e 284 /* Enable the peripheral */
mbed_official 354:e67efb2aab0e 285 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 354:e67efb2aab0e 286
mbed_official 354:e67efb2aab0e 287 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 288 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 289
mbed_official 354:e67efb2aab0e 290 /* Process Unlocked */
mbed_official 354:e67efb2aab0e 291 __HAL_UNLOCK(hwwdg);
mbed_official 354:e67efb2aab0e 292
mbed_official 354:e67efb2aab0e 293 /* Return function status */
mbed_official 354:e67efb2aab0e 294 return HAL_OK;
mbed_official 354:e67efb2aab0e 295 }
mbed_official 354:e67efb2aab0e 296
mbed_official 354:e67efb2aab0e 297 /**
mbed_official 354:e67efb2aab0e 298 * @brief Starts the WWDG with interrupt enabled.
mbed_official 354:e67efb2aab0e 299 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 300 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 301 * @retval HAL status
mbed_official 354:e67efb2aab0e 302 */
mbed_official 354:e67efb2aab0e 303 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 304 {
mbed_official 354:e67efb2aab0e 305 /* Process Locked */
mbed_official 354:e67efb2aab0e 306 __HAL_LOCK(hwwdg);
mbed_official 354:e67efb2aab0e 307
mbed_official 354:e67efb2aab0e 308 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 309 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 310
mbed_official 354:e67efb2aab0e 311 /* Enable the Early Wakeup Interrupt */
mbed_official 354:e67efb2aab0e 312 __HAL_WWDG_ENABLE_IT(WWDG_IT_EWI);
mbed_official 354:e67efb2aab0e 313
mbed_official 354:e67efb2aab0e 314 /* Enable the peripheral */
mbed_official 354:e67efb2aab0e 315 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 354:e67efb2aab0e 316
mbed_official 354:e67efb2aab0e 317 /* Return function status */
mbed_official 354:e67efb2aab0e 318 return HAL_OK;
mbed_official 354:e67efb2aab0e 319 }
mbed_official 354:e67efb2aab0e 320
mbed_official 354:e67efb2aab0e 321 /**
mbed_official 354:e67efb2aab0e 322 * @brief Refreshes the WWDG.
mbed_official 354:e67efb2aab0e 323 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 324 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 325 * @param Counter: value of counter to put in WWDG counter
mbed_official 354:e67efb2aab0e 326 * @retval HAL status
mbed_official 354:e67efb2aab0e 327 */
mbed_official 354:e67efb2aab0e 328 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 354:e67efb2aab0e 329 {
mbed_official 354:e67efb2aab0e 330 /* Process Locked */
mbed_official 354:e67efb2aab0e 331 __HAL_LOCK(hwwdg);
mbed_official 354:e67efb2aab0e 332
mbed_official 354:e67efb2aab0e 333 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 334 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 354:e67efb2aab0e 335
mbed_official 354:e67efb2aab0e 336 /* Check the parameters */
mbed_official 354:e67efb2aab0e 337 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 354:e67efb2aab0e 338
mbed_official 354:e67efb2aab0e 339 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 354:e67efb2aab0e 340 MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
mbed_official 354:e67efb2aab0e 341
mbed_official 354:e67efb2aab0e 342 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 343 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 344
mbed_official 354:e67efb2aab0e 345 /* Process Unlocked */
mbed_official 354:e67efb2aab0e 346 __HAL_UNLOCK(hwwdg);
mbed_official 354:e67efb2aab0e 347
mbed_official 354:e67efb2aab0e 348 /* Return function status */
mbed_official 354:e67efb2aab0e 349 return HAL_OK;
mbed_official 354:e67efb2aab0e 350 }
mbed_official 354:e67efb2aab0e 351
mbed_official 354:e67efb2aab0e 352 /**
mbed_official 354:e67efb2aab0e 353 * @brief Handles WWDG interrupt request.
mbed_official 354:e67efb2aab0e 354 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 354:e67efb2aab0e 355 * or data logging must be performed before the actual reset is generated.
mbed_official 354:e67efb2aab0e 356 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 354:e67efb2aab0e 357 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 354:e67efb2aab0e 358 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 354:e67efb2aab0e 359 * be used to trigger specific actions (such as communications or data
mbed_official 354:e67efb2aab0e 360 * logging), before resetting the device.
mbed_official 354:e67efb2aab0e 361 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 362 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 363 * @retval None
mbed_official 354:e67efb2aab0e 364 */
mbed_official 354:e67efb2aab0e 365 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 366 {
mbed_official 354:e67efb2aab0e 367 /* WWDG Early Wakeup Interrupt occurred */
mbed_official 354:e67efb2aab0e 368 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 354:e67efb2aab0e 369 {
mbed_official 354:e67efb2aab0e 370 /* Early Wakeup callback */
mbed_official 354:e67efb2aab0e 371 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 354:e67efb2aab0e 372
mbed_official 354:e67efb2aab0e 373 /* Change WWDG peripheral state */
mbed_official 354:e67efb2aab0e 374 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 354:e67efb2aab0e 375
mbed_official 354:e67efb2aab0e 376 /* Clear the WWDG Data Ready flag */
mbed_official 354:e67efb2aab0e 377 __HAL_WWDG_CLEAR_IT(hwwdg, WWDG_FLAG_EWIF);
mbed_official 354:e67efb2aab0e 378
mbed_official 354:e67efb2aab0e 379 /* Process Unlocked */
mbed_official 354:e67efb2aab0e 380 __HAL_UNLOCK(hwwdg);
mbed_official 354:e67efb2aab0e 381 }
mbed_official 354:e67efb2aab0e 382 }
mbed_official 354:e67efb2aab0e 383
mbed_official 354:e67efb2aab0e 384 /**
mbed_official 354:e67efb2aab0e 385 * @brief Early Wakeup WWDG callback.
mbed_official 354:e67efb2aab0e 386 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 387 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 388 * @retval None
mbed_official 354:e67efb2aab0e 389 */
mbed_official 354:e67efb2aab0e 390 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 354:e67efb2aab0e 391 {
mbed_official 354:e67efb2aab0e 392 /* NOTE: This function Should not be modified, when the callback is needed,
mbed_official 354:e67efb2aab0e 393 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 354:e67efb2aab0e 394 */
mbed_official 354:e67efb2aab0e 395 }
mbed_official 354:e67efb2aab0e 396
mbed_official 354:e67efb2aab0e 397 /**
mbed_official 354:e67efb2aab0e 398 * @}
mbed_official 354:e67efb2aab0e 399 */
mbed_official 354:e67efb2aab0e 400
mbed_official 354:e67efb2aab0e 401 /** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 354:e67efb2aab0e 402 * @brief Peripheral State functions.
mbed_official 354:e67efb2aab0e 403 *
mbed_official 354:e67efb2aab0e 404 @verbatim
mbed_official 354:e67efb2aab0e 405 ==============================================================================
mbed_official 354:e67efb2aab0e 406 ##### Peripheral State functions #####
mbed_official 354:e67efb2aab0e 407 ==============================================================================
mbed_official 354:e67efb2aab0e 408 [..]
mbed_official 354:e67efb2aab0e 409 This subsection permits to get in run-time the status of the peripheral
mbed_official 354:e67efb2aab0e 410 and the data flow.
mbed_official 354:e67efb2aab0e 411
mbed_official 354:e67efb2aab0e 412 @endverbatim
mbed_official 354:e67efb2aab0e 413 * @{
mbed_official 354:e67efb2aab0e 414 */
mbed_official 354:e67efb2aab0e 415
mbed_official 354:e67efb2aab0e 416 /**
mbed_official 354:e67efb2aab0e 417 * @brief Returns the WWDG state.
mbed_official 354:e67efb2aab0e 418 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 354:e67efb2aab0e 419 * the configuration information for the specified WWDG module.
mbed_official 354:e67efb2aab0e 420 * @retval HAL state
mbed_official 354:e67efb2aab0e 421 */
mbed_official 354:e67efb2aab0e 422 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 354:e67efb2aab0e 423 {
mbed_official 354:e67efb2aab0e 424 return hwwdg->State;
mbed_official 354:e67efb2aab0e 425 }
mbed_official 354:e67efb2aab0e 426
mbed_official 354:e67efb2aab0e 427 /**
mbed_official 354:e67efb2aab0e 428 * @}
mbed_official 354:e67efb2aab0e 429 */
mbed_official 354:e67efb2aab0e 430
mbed_official 354:e67efb2aab0e 431 /**
mbed_official 354:e67efb2aab0e 432 * @}
mbed_official 354:e67efb2aab0e 433 */
mbed_official 354:e67efb2aab0e 434
mbed_official 354:e67efb2aab0e 435 #endif /* HAL_WWDG_MODULE_ENABLED */
mbed_official 354:e67efb2aab0e 436 /**
mbed_official 354:e67efb2aab0e 437 * @}
mbed_official 354:e67efb2aab0e 438 */
mbed_official 354:e67efb2aab0e 439
mbed_official 354:e67efb2aab0e 440 /**
mbed_official 354:e67efb2aab0e 441 * @}
mbed_official 354:e67efb2aab0e 442 */
mbed_official 354:e67efb2aab0e 443
mbed_official 354:e67efb2aab0e 444 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/