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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F0/stm32f0xx_hal_wwdg.c@392:2b59412bb664, 2014-11-07 (annotated)

Committer:
mbed_official
Date:
Fri Nov 07 08:15:08 2014 +0000
Revision:
392:2b59412bb664
Parent:
targets/cmsis/TARGET_STM/TARGET_NUCLEO_F091RC/stm32f0xx_hal_wwdg.c@340:28d1f895c6fe
Child:
441:d2c15dda23c1
Synchronized with git revision eec0be05cd92349bee83c65f9e1302b25b5badf4



Full URL: https://github.com/mbedmicro/mbed/commit/eec0be05cd92349bee83c65f9e1302b25b5badf4/



Targets: STM32F0 - Factorisation of NUCLEO_F030R8/F072RB/F091RC cmsis folders

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 340:28d1f895c6fe 5 * @version V1.1.0
mbed_official 340:28d1f895c6fe 6 * @date 03-Oct-2014
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 *
mbed_official 340:28d1f895c6fe 14 @verbatim
mbed_official 340:28d1f895c6fe 15 ==============================================================================
mbed_official 340:28d1f895c6fe 16 ##### WWDG specific features #####
mbed_official 340:28d1f895c6fe 17 ==============================================================================
mbed_official 340:28d1f895c6fe 18 [..]
mbed_official 340:28d1f895c6fe 19 Once enabled the WWDG generates a system reset on expiry of a programmed
mbed_official 340:28d1f895c6fe 20 time period, unless the program refreshes the Counter (T[6;0] downcounter)
mbed_official 340:28d1f895c6fe 21 before reaching 0x3F value (i.e. a reset is generated when the counter
mbed_official 340:28d1f895c6fe 22 value rolls over from 0x40 to 0x3F).
mbed_official 340:28d1f895c6fe 23
mbed_official 340:28d1f895c6fe 24 (+) An MCU reset is also generated if the counter value is refreshed
mbed_official 340:28d1f895c6fe 25 before the counter has reached the refresh window value. This
mbed_official 340:28d1f895c6fe 26 implies that the counter must be refreshed in a limited window.
mbed_official 340:28d1f895c6fe 27 (+) Once enabled the WWDG cannot be disabled except by a system reset.
mbed_official 340:28d1f895c6fe 28 (+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
mbed_official 340:28d1f895c6fe 29 reset occurs.
mbed_official 340:28d1f895c6fe 30 (+) The WWDG counter input clock is derived from the APB clock divided
mbed_official 340:28d1f895c6fe 31 by a programmable prescaler.
mbed_official 340:28d1f895c6fe 32 (+) WWDG clock (Hz) = PCLK / (4096 * Prescaler)
mbed_official 340:28d1f895c6fe 33 (+) WWDG timeout (mS) = 1000 * (T[5;0] + 1) / WWDG clock
mbed_official 340:28d1f895c6fe 34 where T[5;0] are the lowest 6 bits of Counter.
mbed_official 340:28d1f895c6fe 35 (+) WWDG Counter refresh is allowed between the following limits :
mbed_official 340:28d1f895c6fe 36 (++) min time (mS) = 1000 * (Counter-Window) / WWDG clock
mbed_official 340:28d1f895c6fe 37 (++) max time (mS) = 1000 * (Counter-0x40) / WWDG clock
mbed_official 340:28d1f895c6fe 38
mbed_official 340:28d1f895c6fe 39 (+) Min-max timeout value @48 MHz(PCLK): ~85,3us / ~5,46 ms
mbed_official 340:28d1f895c6fe 40
mbed_official 340:28d1f895c6fe 41 ===============================================================================
mbed_official 340:28d1f895c6fe 42 ##### How to use this driver #####
mbed_official 340:28d1f895c6fe 43 ===============================================================================
mbed_official 340:28d1f895c6fe 44 [..]
mbed_official 340:28d1f895c6fe 45 (+) Enable WWDG APB1 clock using __WWDG_CLK_ENABLE().
mbed_official 340:28d1f895c6fe 46 (+) Set the WWDG prescaler, refresh window and counter value
mbed_official 340:28d1f895c6fe 47 using HAL_WWDG_Init() function.
mbed_official 340:28d1f895c6fe 48 (+) Start the WWDG using HAL_WWDG_Start() function.
mbed_official 340:28d1f895c6fe 49 When the WWDG is enabled the counter value should be configured to
mbed_official 340:28d1f895c6fe 50 a value greater than 0x40 to prevent generating an immediate reset.
mbed_official 340:28d1f895c6fe 51 (+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
mbed_official 340:28d1f895c6fe 52 generated when the counter reaches 0x40, and then start the WWDG using
mbed_official 340:28d1f895c6fe 53 HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback is executed and user can
mbed_official 340:28d1f895c6fe 54 add his own code by customization of function pointer HAL_WWDG_WakeupCallback
mbed_official 340:28d1f895c6fe 55 Once enabled, EWI interrupt cannot be disabled except by a system reset.
mbed_official 340:28d1f895c6fe 56 (+) Then the application program must refresh the WWDG counter at regular
mbed_official 340:28d1f895c6fe 57 intervals during normal operation to prevent an MCU reset, using
mbed_official 340:28d1f895c6fe 58 HAL_WWDG_Refresh() function. This operation must occur only when
mbed_official 340:28d1f895c6fe 59 the counter is lower than the refresh window value already programmed.
mbed_official 340:28d1f895c6fe 60
mbed_official 340:28d1f895c6fe 61 *** WWDG HAL driver macros list ***
mbed_official 340:28d1f895c6fe 62 ==================================
mbed_official 340:28d1f895c6fe 63 [..]
mbed_official 340:28d1f895c6fe 64 Below the list of most used macros in WWDG HAL driver.
mbed_official 340:28d1f895c6fe 65
mbed_official 340:28d1f895c6fe 66 (+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
mbed_official 340:28d1f895c6fe 67 (+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
mbed_official 340:28d1f895c6fe 68 (+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
mbed_official 340:28d1f895c6fe 69 (+) __HAL_WWDG_ENABLE_IT: Enables the WWDG early wakeup interrupt
mbed_official 340:28d1f895c6fe 70
mbed_official 340:28d1f895c6fe 71 @endverbatim
mbed_official 340:28d1f895c6fe 72 ******************************************************************************
mbed_official 340:28d1f895c6fe 73 * @attention
mbed_official 340:28d1f895c6fe 74 *
mbed_official 340:28d1f895c6fe 75 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 340:28d1f895c6fe 76 *
mbed_official 340:28d1f895c6fe 77 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 340:28d1f895c6fe 78 * are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 79 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 80 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 81 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 82 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 83 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 84 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 85 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 86 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 87 *
mbed_official 340:28d1f895c6fe 88 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 89 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 90 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 91 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 92 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 93 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 94 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 95 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 96 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 97 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 98 *
mbed_official 340:28d1f895c6fe 99 ******************************************************************************
mbed_official 340:28d1f895c6fe 100 */
mbed_official 340:28d1f895c6fe 101
mbed_official 340:28d1f895c6fe 102 /* Includes ------------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 103 #include "stm32f0xx_hal.h"
mbed_official 340:28d1f895c6fe 104
mbed_official 340:28d1f895c6fe 105 /** @addtogroup STM32F0xx_HAL_Driver
mbed_official 340:28d1f895c6fe 106 * @{
mbed_official 340:28d1f895c6fe 107 */
mbed_official 340:28d1f895c6fe 108
mbed_official 340:28d1f895c6fe 109 /** @defgroup WWDG WWDG HAL module driver
mbed_official 340:28d1f895c6fe 110 * @brief WWDG HAL module driver.
mbed_official 340:28d1f895c6fe 111 * @{
mbed_official 340:28d1f895c6fe 112 */
mbed_official 340:28d1f895c6fe 113
mbed_official 340:28d1f895c6fe 114 #ifdef HAL_WWDG_MODULE_ENABLED
mbed_official 340:28d1f895c6fe 115
mbed_official 340:28d1f895c6fe 116 /* Private typedef -----------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 117 /* Private define ------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 118 /* Private macro -------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 119 /* Private variables ---------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 120 /* Private function prototypes -----------------------------------------------*/
mbed_official 340:28d1f895c6fe 121 /* Private functions ---------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 122
mbed_official 340:28d1f895c6fe 123 /** @defgroup WWDG_Exported_Functions WWDG Exported Functions
mbed_official 340:28d1f895c6fe 124 * @{
mbed_official 340:28d1f895c6fe 125 */
mbed_official 340:28d1f895c6fe 126
mbed_official 340:28d1f895c6fe 127 /** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 340:28d1f895c6fe 128 * @brief Initialization and Configuration functions.
mbed_official 340:28d1f895c6fe 129 *
mbed_official 340:28d1f895c6fe 130 @verbatim
mbed_official 340:28d1f895c6fe 131 ==============================================================================
mbed_official 340:28d1f895c6fe 132 ##### Initialization and de-initialization functions #####
mbed_official 340:28d1f895c6fe 133 ==============================================================================
mbed_official 340:28d1f895c6fe 134 [..]
mbed_official 340:28d1f895c6fe 135 This section provides functions allowing to:
mbed_official 340:28d1f895c6fe 136 (+) Initialize the WWDG according to the specified parameters
mbed_official 340:28d1f895c6fe 137 in the WWDG_InitTypeDef and create the associated handle
mbed_official 340:28d1f895c6fe 138 (+) DeInitialize the WWDG peripheral
mbed_official 340:28d1f895c6fe 139 (+) Initialize the WWDG MSP
mbed_official 340:28d1f895c6fe 140 (+) DeInitialize the WWDG MSP
mbed_official 340:28d1f895c6fe 141
mbed_official 340:28d1f895c6fe 142 @endverbatim
mbed_official 340:28d1f895c6fe 143 * @{
mbed_official 340:28d1f895c6fe 144 */
mbed_official 340:28d1f895c6fe 145
mbed_official 340:28d1f895c6fe 146 /**
mbed_official 340:28d1f895c6fe 147 * @brief Initializes the WWDG according to the specified
mbed_official 340:28d1f895c6fe 148 * parameters in the WWDG_InitTypeDef and creates the associated handle.
mbed_official 340:28d1f895c6fe 149 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 150 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 151 * @retval HAL status
mbed_official 340:28d1f895c6fe 152 */
mbed_official 340:28d1f895c6fe 153 HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 154 {
mbed_official 340:28d1f895c6fe 155 /* Check the WWDG handle allocation */
mbed_official 340:28d1f895c6fe 156 if(hwwdg == HAL_NULL)
mbed_official 340:28d1f895c6fe 157 {
mbed_official 340:28d1f895c6fe 158 return HAL_ERROR;
mbed_official 340:28d1f895c6fe 159 }
mbed_official 340:28d1f895c6fe 160
mbed_official 340:28d1f895c6fe 161 /* Check the parameters */
mbed_official 340:28d1f895c6fe 162 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 340:28d1f895c6fe 163 assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
mbed_official 340:28d1f895c6fe 164 assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
mbed_official 340:28d1f895c6fe 165 assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
mbed_official 340:28d1f895c6fe 166
mbed_official 340:28d1f895c6fe 167 if(hwwdg->State == HAL_WWDG_STATE_RESET)
mbed_official 340:28d1f895c6fe 168 {
mbed_official 340:28d1f895c6fe 169 /* Init the low level hardware */
mbed_official 340:28d1f895c6fe 170 HAL_WWDG_MspInit(hwwdg);
mbed_official 340:28d1f895c6fe 171 }
mbed_official 340:28d1f895c6fe 172
mbed_official 340:28d1f895c6fe 173 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 174 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 175
mbed_official 340:28d1f895c6fe 176 /* Set WWDG Prescaler and Window */
mbed_official 340:28d1f895c6fe 177 MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
mbed_official 340:28d1f895c6fe 178
mbed_official 340:28d1f895c6fe 179 /* Set WWDG Counter */
mbed_official 340:28d1f895c6fe 180 MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
mbed_official 340:28d1f895c6fe 181
mbed_official 340:28d1f895c6fe 182 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 183 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 184
mbed_official 340:28d1f895c6fe 185 /* Return function status */
mbed_official 340:28d1f895c6fe 186 return HAL_OK;
mbed_official 340:28d1f895c6fe 187 }
mbed_official 340:28d1f895c6fe 188
mbed_official 340:28d1f895c6fe 189 /**
mbed_official 340:28d1f895c6fe 190 * @brief DeInitializes the WWDG peripheral.
mbed_official 340:28d1f895c6fe 191 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 192 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 193 * @retval HAL status
mbed_official 340:28d1f895c6fe 194 */
mbed_official 340:28d1f895c6fe 195 HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 196 {
mbed_official 340:28d1f895c6fe 197 /* Check the parameters */
mbed_official 340:28d1f895c6fe 198 assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
mbed_official 340:28d1f895c6fe 199
mbed_official 340:28d1f895c6fe 200 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 201 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 202
mbed_official 340:28d1f895c6fe 203 /* DeInit the low level hardware */
mbed_official 340:28d1f895c6fe 204 HAL_WWDG_MspDeInit(hwwdg);
mbed_official 340:28d1f895c6fe 205
mbed_official 340:28d1f895c6fe 206 /* Reset WWDG Control register */
mbed_official 340:28d1f895c6fe 207 hwwdg->Instance->CR = (uint32_t)0x0000007F;
mbed_official 340:28d1f895c6fe 208
mbed_official 340:28d1f895c6fe 209 /* Reset WWDG Configuration register */
mbed_official 340:28d1f895c6fe 210 hwwdg->Instance->CFR = (uint32_t)0x0000007F;
mbed_official 340:28d1f895c6fe 211
mbed_official 340:28d1f895c6fe 212 /* Reset WWDG Status register */
mbed_official 340:28d1f895c6fe 213 hwwdg->Instance->SR = 0;
mbed_official 340:28d1f895c6fe 214
mbed_official 340:28d1f895c6fe 215 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 216 hwwdg->State = HAL_WWDG_STATE_RESET;
mbed_official 340:28d1f895c6fe 217
mbed_official 340:28d1f895c6fe 218 /* Release Lock */
mbed_official 340:28d1f895c6fe 219 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 220
mbed_official 340:28d1f895c6fe 221 /* Return function status */
mbed_official 340:28d1f895c6fe 222 return HAL_OK;
mbed_official 340:28d1f895c6fe 223 }
mbed_official 340:28d1f895c6fe 224
mbed_official 340:28d1f895c6fe 225 /**
mbed_official 340:28d1f895c6fe 226 * @brief Initializes the WWDG MSP.
mbed_official 340:28d1f895c6fe 227 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 228 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 229 * @retval None
mbed_official 340:28d1f895c6fe 230 */
mbed_official 340:28d1f895c6fe 231 __weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 232 {
mbed_official 340:28d1f895c6fe 233 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 234 the HAL_WWDG_MspInit could be implemented in the user file
mbed_official 340:28d1f895c6fe 235 */
mbed_official 340:28d1f895c6fe 236 }
mbed_official 340:28d1f895c6fe 237
mbed_official 340:28d1f895c6fe 238 /**
mbed_official 340:28d1f895c6fe 239 * @brief DeInitializes the WWDG MSP.
mbed_official 340:28d1f895c6fe 240 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 241 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 242 * @retval None
mbed_official 340:28d1f895c6fe 243 */
mbed_official 340:28d1f895c6fe 244 __weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 245 {
mbed_official 340:28d1f895c6fe 246 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 247 the HAL_WWDG_MspDeInit could be implemented in the user file
mbed_official 340:28d1f895c6fe 248 */
mbed_official 340:28d1f895c6fe 249 }
mbed_official 340:28d1f895c6fe 250
mbed_official 340:28d1f895c6fe 251 /**
mbed_official 340:28d1f895c6fe 252 * @}
mbed_official 340:28d1f895c6fe 253 */
mbed_official 340:28d1f895c6fe 254
mbed_official 340:28d1f895c6fe 255 /** @defgroup WWDG_Exported_Functions_Group2 IO operation functions
mbed_official 340:28d1f895c6fe 256 * @brief IO operation functions
mbed_official 340:28d1f895c6fe 257 *
mbed_official 340:28d1f895c6fe 258 @verbatim
mbed_official 340:28d1f895c6fe 259 ==============================================================================
mbed_official 340:28d1f895c6fe 260 ##### IO operation functions #####
mbed_official 340:28d1f895c6fe 261 ==============================================================================
mbed_official 340:28d1f895c6fe 262 [..]
mbed_official 340:28d1f895c6fe 263 This section provides functions allowing to:
mbed_official 340:28d1f895c6fe 264 (+) Start the WWDG.
mbed_official 340:28d1f895c6fe 265 (+) Refresh the WWDG.
mbed_official 340:28d1f895c6fe 266 (+) Handle WWDG interrupt request.
mbed_official 340:28d1f895c6fe 267
mbed_official 340:28d1f895c6fe 268 @endverbatim
mbed_official 340:28d1f895c6fe 269 * @{
mbed_official 340:28d1f895c6fe 270 */
mbed_official 340:28d1f895c6fe 271
mbed_official 340:28d1f895c6fe 272 /**
mbed_official 340:28d1f895c6fe 273 * @brief Starts the WWDG.
mbed_official 340:28d1f895c6fe 274 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 275 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 276 * @retval HAL status
mbed_official 340:28d1f895c6fe 277 */
mbed_official 340:28d1f895c6fe 278 HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 279 {
mbed_official 340:28d1f895c6fe 280 /* Process Locked */
mbed_official 340:28d1f895c6fe 281 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 282
mbed_official 340:28d1f895c6fe 283 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 284 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 285
mbed_official 340:28d1f895c6fe 286 /* Enable the peripheral */
mbed_official 340:28d1f895c6fe 287 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 340:28d1f895c6fe 288
mbed_official 340:28d1f895c6fe 289 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 290 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 291
mbed_official 340:28d1f895c6fe 292 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 293 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 294
mbed_official 340:28d1f895c6fe 295 /* Return function status */
mbed_official 340:28d1f895c6fe 296 return HAL_OK;
mbed_official 340:28d1f895c6fe 297 }
mbed_official 340:28d1f895c6fe 298
mbed_official 340:28d1f895c6fe 299 /**
mbed_official 340:28d1f895c6fe 300 * @brief Starts the WWDG with interrupt enabled.
mbed_official 340:28d1f895c6fe 301 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 302 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 303 * @retval HAL status
mbed_official 340:28d1f895c6fe 304 */
mbed_official 340:28d1f895c6fe 305 HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 306 {
mbed_official 340:28d1f895c6fe 307 /* Process Locked */
mbed_official 340:28d1f895c6fe 308 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 309
mbed_official 340:28d1f895c6fe 310 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 311 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 312
mbed_official 340:28d1f895c6fe 313 /* Enable the Early Wakeup Interrupt */
mbed_official 340:28d1f895c6fe 314 __HAL_WWDG_ENABLE_IT(WWDG_IT_EWI);
mbed_official 340:28d1f895c6fe 315
mbed_official 340:28d1f895c6fe 316 /* Enable the peripheral */
mbed_official 340:28d1f895c6fe 317 __HAL_WWDG_ENABLE(hwwdg);
mbed_official 340:28d1f895c6fe 318
mbed_official 340:28d1f895c6fe 319 /* Return function status */
mbed_official 340:28d1f895c6fe 320 return HAL_OK;
mbed_official 340:28d1f895c6fe 321 }
mbed_official 340:28d1f895c6fe 322
mbed_official 340:28d1f895c6fe 323 /**
mbed_official 340:28d1f895c6fe 324 * @brief Refreshes the WWDG.
mbed_official 340:28d1f895c6fe 325 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 326 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 327 * @param Counter: value of counter to put in WWDG counter
mbed_official 340:28d1f895c6fe 328 * @retval HAL status
mbed_official 340:28d1f895c6fe 329 */
mbed_official 340:28d1f895c6fe 330 HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
mbed_official 340:28d1f895c6fe 331 {
mbed_official 340:28d1f895c6fe 332 /* Process Locked */
mbed_official 340:28d1f895c6fe 333 __HAL_LOCK(hwwdg);
mbed_official 340:28d1f895c6fe 334
mbed_official 340:28d1f895c6fe 335 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 336 hwwdg->State = HAL_WWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 337
mbed_official 340:28d1f895c6fe 338 /* Check the parameters */
mbed_official 340:28d1f895c6fe 339 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 340:28d1f895c6fe 340
mbed_official 340:28d1f895c6fe 341 /* Write to WWDG CR the WWDG Counter value to refresh with */
mbed_official 340:28d1f895c6fe 342 MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
mbed_official 340:28d1f895c6fe 343
mbed_official 340:28d1f895c6fe 344 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 345 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 346
mbed_official 340:28d1f895c6fe 347 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 348 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 349
mbed_official 340:28d1f895c6fe 350 /* Return function status */
mbed_official 340:28d1f895c6fe 351 return HAL_OK;
mbed_official 340:28d1f895c6fe 352 }
mbed_official 340:28d1f895c6fe 353
mbed_official 340:28d1f895c6fe 354 /**
mbed_official 340:28d1f895c6fe 355 * @brief Handles WWDG interrupt request.
mbed_official 340:28d1f895c6fe 356 * @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
mbed_official 340:28d1f895c6fe 357 * or data logging must be performed before the actual reset is generated.
mbed_official 340:28d1f895c6fe 358 * The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
mbed_official 340:28d1f895c6fe 359 * When the downcounter reaches the value 0x40, and EWI interrupt is
mbed_official 340:28d1f895c6fe 360 * generated and the corresponding Interrupt Service Routine (ISR) can
mbed_official 340:28d1f895c6fe 361 * be used to trigger specific actions (such as communications or data
mbed_official 340:28d1f895c6fe 362 * logging), before resetting the device.
mbed_official 340:28d1f895c6fe 363 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 364 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 365 * @retval None
mbed_official 340:28d1f895c6fe 366 */
mbed_official 340:28d1f895c6fe 367 void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 368 {
mbed_official 340:28d1f895c6fe 369 /* WWDG Early Wakeup Interrupt occurred */
mbed_official 340:28d1f895c6fe 370 if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
mbed_official 340:28d1f895c6fe 371 {
mbed_official 340:28d1f895c6fe 372 /* Early Wakeup callback */
mbed_official 340:28d1f895c6fe 373 HAL_WWDG_WakeupCallback(hwwdg);
mbed_official 340:28d1f895c6fe 374
mbed_official 340:28d1f895c6fe 375 /* Change WWDG peripheral state */
mbed_official 340:28d1f895c6fe 376 hwwdg->State = HAL_WWDG_STATE_READY;
mbed_official 340:28d1f895c6fe 377
mbed_official 340:28d1f895c6fe 378 /* Clear the WWDG Data Ready flag */
mbed_official 340:28d1f895c6fe 379 __HAL_WWDG_CLEAR_IT(hwwdg, WWDG_FLAG_EWIF);
mbed_official 340:28d1f895c6fe 380
mbed_official 340:28d1f895c6fe 381 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 382 __HAL_UNLOCK(hwwdg);
mbed_official 340:28d1f895c6fe 383 }
mbed_official 340:28d1f895c6fe 384 }
mbed_official 340:28d1f895c6fe 385
mbed_official 340:28d1f895c6fe 386 /**
mbed_official 340:28d1f895c6fe 387 * @brief Early Wakeup WWDG callback.
mbed_official 340:28d1f895c6fe 388 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 389 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 390 * @retval None
mbed_official 340:28d1f895c6fe 391 */
mbed_official 340:28d1f895c6fe 392 __weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
mbed_official 340:28d1f895c6fe 393 {
mbed_official 340:28d1f895c6fe 394 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 395 the HAL_WWDG_WakeupCallback could be implemented in the user file
mbed_official 340:28d1f895c6fe 396 */
mbed_official 340:28d1f895c6fe 397 }
mbed_official 340:28d1f895c6fe 398
mbed_official 340:28d1f895c6fe 399 /**
mbed_official 340:28d1f895c6fe 400 * @}
mbed_official 340:28d1f895c6fe 401 */
mbed_official 340:28d1f895c6fe 402
mbed_official 340:28d1f895c6fe 403 /** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 340:28d1f895c6fe 404 * @brief Peripheral State functions.
mbed_official 340:28d1f895c6fe 405 *
mbed_official 340:28d1f895c6fe 406 @verbatim
mbed_official 340:28d1f895c6fe 407 ==============================================================================
mbed_official 340:28d1f895c6fe 408 ##### Peripheral State functions #####
mbed_official 340:28d1f895c6fe 409 ==============================================================================
mbed_official 340:28d1f895c6fe 410 [..]
mbed_official 340:28d1f895c6fe 411 This subsection permits to get in run-time the status of the peripheral
mbed_official 340:28d1f895c6fe 412 and the data flow.
mbed_official 340:28d1f895c6fe 413
mbed_official 340:28d1f895c6fe 414 @endverbatim
mbed_official 340:28d1f895c6fe 415 * @{
mbed_official 340:28d1f895c6fe 416 */
mbed_official 340:28d1f895c6fe 417
mbed_official 340:28d1f895c6fe 418 /**
mbed_official 340:28d1f895c6fe 419 * @brief Returns the WWDG state.
mbed_official 340:28d1f895c6fe 420 * @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 421 * the configuration information for the specified WWDG module.
mbed_official 340:28d1f895c6fe 422 * @retval HAL state
mbed_official 340:28d1f895c6fe 423 */
mbed_official 340:28d1f895c6fe 424 HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
mbed_official 340:28d1f895c6fe 425 {
mbed_official 340:28d1f895c6fe 426 return hwwdg->State;
mbed_official 340:28d1f895c6fe 427 }
mbed_official 340:28d1f895c6fe 428
mbed_official 340:28d1f895c6fe 429 /**
mbed_official 340:28d1f895c6fe 430 * @}
mbed_official 340:28d1f895c6fe 431 */
mbed_official 340:28d1f895c6fe 432
mbed_official 340:28d1f895c6fe 433 /**
mbed_official 340:28d1f895c6fe 434 * @}
mbed_official 340:28d1f895c6fe 435 */
mbed_official 340:28d1f895c6fe 436
mbed_official 340:28d1f895c6fe 437 #endif /* HAL_WWDG_MODULE_ENABLED */
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 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/